DOC AIRBUS | AMM A320FCompensation Adjustment/Test of the Standby Compass
TASK 34-22-00-730-001-A
Compensation Adjustment/Test of the Standby Compass
A. Fixtures, Tools, Test and Support Equipment
B. Work Zones and Access Panels
C. Expendable Parts
D. Referenced Information
3. Job Set-up
Subtask 34-22-00-861-050-A
Subtask 34-22-00-730-050-A ** ON A/C NOT FOR ALL
Subtask 34-22-00-860-053-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.01 00:59:49 UTC
Compensation Adjustment/Test of the Standby Compass
WARNING:
MAKE SURE THAT ALL THE CIRCUITS IN MAINTENANCE ARE ISOLATED BEFORE YOU SUPPLY ELECTRICAL POWER TO THE AIRCRAFT. UNWANTED ELECTRICAL POWER CAN BE DANGEROUS.
NOTE: To move the aircraft for this procedure, you can use:
- A tractor (before each adjustment, it is necessary to disconnect the tractor and the towbar and move the tractor 70 meters minimum away from the aircraft), or
- The aircraft engines (this is the recommended procedure).
ZONE: 210
1. Reason for the Job- To adjust the compensation of the standby compass
- To find the deviation curve of the compass values when they are more than + or - 8° from the magnetic heading.
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | AR | SCREWDRIVER WIDTH 2 MM (0,23 IN) - NON MAGNETIC |
| CE2-40 | AR | KEY-CORRECTOR |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 210 | CKPT,FWD COMPT BHD TO FLT COMPT BULKHEAD |
| FIG.ITEM | DESIGNATION | IPC-CSN |
|---|---|---|
| 1 | TWO CORRECTION CARDS | AIPC 11-31-34-01-010 |
| 1 | TWO CORRECTION CARDS | AIPC 25-13-81-43-010 |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 24-41-00-861-002-A | Energize the Aircraft Electrical Circuits from the External Power |
| TASK 24-41-00-861-002-A-01 | Energize the Aircraft Electrical Circuits from the APU |
| TASK 24-41-00-861-002-A-02 | Energize the Aircraft Electrical Circuits from Engine 1(2) |
| TASK 24-41-00-862-002-A | De-energize the Aircraft Electrical Circuits Supplied from the External Power |
| TASK 24-41-00-862-002-A-01 | De-energize the Aircraft Electrical Circuits Supplied from the APU |
| TASK 24-41-00-862-002-A-02 | De-energize the Aircraft Electrical Circuits Supplied from the Engine 1(2) |
| TASK 31-60-00-860-001-A | EIS Start Procedure |
| TASK 31-60-00-860-002-A | EIS Stop Procedure |
| TASK 34-10-00-860-004-A | Inertial Reference (IR) Alignment-Procedure |
| TASK 34-10-00-860-004-A-01 | Automatic Inertial Reference (IR) Alignment-Procedure |
| TASK 34-10-00-860-004-A-02 | Inertial Reference (IR) Alignment-Procedure to do a Check of the Links between each Flight Management and Guidance Computer (FMGC) and the three Air Data/Inertial Reference Units (ADIRUs) |
| TASK 34-10-00-860-005-A | ADIRS Stop Procedure |
| TASK 34-22-00-710-001-A | Operational Check of the Standby Compass Including Light Test and Visual Check |
| TASK 34-22-00-710-001-A-01 | Operational Check of the Standby Compass Including Light Test and Visual Check (with the Standby Compass Calibrator) |
| TASK 71-00-00-710-003-A | Engine Automatic Start |
| TASK 71-00-00-710-003-B | Engine Automatic Start |
| TASK 71-00-00-710-018-A | Discontinued Start, Restart and Shutdown Procedures |
| TASK 71-00-00-710-028-A | Engine Shutdown |
| TASK 71-00-00-710-028-B | Engine Shutdown |
| TASK 71-00-00-710-043-A | Normal Engine Automatic-Start Procedure |
| TASK 71-00-00-860-814-A | Shutdown of the Engine |
| TASK 71-00-00-860-823-A | Start the Engine (Normal Automatic Start) |
Standby CompassSubtask 34-22-00-861-050-A
A. Aircraft Maintenance Configuration
(1) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).
Subtask 34-22-00-860-052-B ** ON A/C NOT FOR ALL (1) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).
B. Aircraft Maintenance Configuration
Ferromagnetic parts near the standby compass can cause compass heading errors (fasteners, tools, etc).
(2) Start the engines (recommended procedure) (Ref. AMM TASK 71-00-00-710-043).
(4) Do the EIS start procedure (NDs only) (Ref. AMM TASK 31-60-00-860-001).
(5) Do the IR alignment procedure (Ref. AMM TASK 34-10-00-860-004).
(6) Adjust the position of the aircraft until its lubber line points to the North with a deviation less than 2°.
Subtask 34-22-00-860-052-D ** ON A/C NOT FOR ALL NOTE: For this procedure the aircraft must be on a compensation base that can support the weight of the aircraft.
(1) Make sure that there are no ferromagnetic parts installed near the standby compass. - The compensation base must have the certification of the local applicable authorities.
Ferromagnetic parts near the standby compass can cause compass heading errors (fasteners, tools, etc).
(2) Start the engines (recommended procedure) (Ref. AMM TASK 71-00-00-710-043).
NOTE: You can also do the compensation procedure with the engines off.
(3) Make sure that the standby compass operates correctly (Ref. AMM TASK 34-22-00-710-001). (4) Do the EIS start procedure (NDs only) (Ref. AMM TASK 31-60-00-860-001).
(5) Do the IR alignment procedure (Ref. AMM TASK 34-10-00-860-004).
(6) Adjust the position of the aircraft until its lubber line points to the North with a deviation less than 2°.
NOTE: The lubber line is the north-south marking on the compensation base or the magnetic north value shown on the NDs.
B. Aircraft Maintenance Configuration
Ferromagnetic parts near the standby compass can cause compass heading errors (fasteners, tools, etc.).
(2) Start the engines (recommended procedure) (Ref. AMM TASK 71-00-00-710-003).
(4) Do the EIS start procedure (NDs only) (Ref. AMM TASK 31-60-00-860-001).
(5) Do the IR alignment procedure (Ref. AMM TASK 34-10-00-860-004).
(6) Adjust the position of the aircraft until its lubber line points to the North with a deviation less than 2°.
Subtask 34-22-00-860-052-F ** ON A/C NOT FOR ALL NOTE: For this procedure the aircraft must be on a compensation base that can support the weight of the aircraft.
(1) Make sure that there are no ferromagnetic parts installed near the standby compass. - The compensation base must have the certification of the local applicable authorities.
Ferromagnetic parts near the standby compass can cause compass heading errors (fasteners, tools, etc.).
(2) Start the engines (recommended procedure) (Ref. AMM TASK 71-00-00-710-003).
NOTE: You can also do the compensation procedure with the engines off.
(3) Make sure that the standby compass operates correctly (Ref. AMM TASK 34-22-00-710-001). (4) Do the EIS start procedure (NDs only) (Ref. AMM TASK 31-60-00-860-001).
(5) Do the IR alignment procedure (Ref. AMM TASK 34-10-00-860-004).
(6) Adjust the position of the aircraft until its lubber line points to the North with a deviation less than 2°.
NOTE: The lubber line is the north-south marking on the compensation base or the magnetic north value shown on the NDs.
(7) On the ADIRS CDU, set the DISPLAY DATA selector switch to HDG. B. Aircraft Maintenance Configuration
Ferromagnetic parts near the standby compass can cause compass heading errors (fasteners, tools, etc.).
(2) Start the engines (recommended procedure) (Ref. AMM TASK 71-00-00-710-003).
(4) Do the EIS start procedure (NDs only) (Ref. AMM TASK 31-60-00-860-001).
(5) Do the IR alignment procedure (Ref. AMM TASK 34-10-00-860-004).
(6) Adjust the position of the aircraft until its lubber line points to the North with a deviation less than 2°.
Subtask 34-22-00-860-052-G ** ON A/C NOT FOR ALL NOTE: For this procedure the aircraft must be on a compensation base that can support the weight of the aircraft.
(1) Make sure that there are no ferromagnetic parts installed near the standby compass. - The compensation base must have the certification of the local applicable authorities.
Ferromagnetic parts near the standby compass can cause compass heading errors (fasteners, tools, etc.).
(2) Start the engines (recommended procedure) (Ref. AMM TASK 71-00-00-710-003).
NOTE: You can also do the compensation procedure with the engines off.
(3) Make sure that the standby compass operates correctly (Ref. AMM TASK 34-22-00-710-001). (4) Do the EIS start procedure (NDs only) (Ref. AMM TASK 31-60-00-860-001).
(5) Do the IR alignment procedure (Ref. AMM TASK 34-10-00-860-004).
(6) Adjust the position of the aircraft until its lubber line points to the North with a deviation less than 2°.
NOTE: The lubber line is the north-south marking on the compensation base or the magnetic north value shown on the NDs.
B. Aircraft Maintenance Configuration
Ferromagnetic parts near the standby compass can cause compass heading errors (fasteners, tools, etc).
(2) Start the engines (recommended procedure) (Ref. AMM TASK 71-00-00-860-823).
(4) Do the EIS start procedure (NDs only) (Ref. AMM TASK 31-60-00-860-001).
(5) Do the IR alignment procedure (Ref. AMM TASK 34-10-00-860-004).
(6) Adjust the position of the aircraft until its lubber line points to the North with a deviation less than 2°.
Subtask 34-22-00-865-050-A NOTE: For this procedure the aircraft must be on a compensation base that can support the weight of the aircraft.
(1) Make sure that there are no ferromagnetic parts installed near the standby compass. - The compensation base must have the certification of the local applicable authorities.
Ferromagnetic parts near the standby compass can cause compass heading errors (fasteners, tools, etc).
(2) Start the engines (recommended procedure) (Ref. AMM TASK 71-00-00-860-823).
NOTE: You can also do the compensation procedure with the engines off.
(3) Make sure that the standby compass operates correctly (Ref. AMM TASK 34-22-00-710-001). (4) Do the EIS start procedure (NDs only) (Ref. AMM TASK 31-60-00-860-001).
(5) Do the IR alignment procedure (Ref. AMM TASK 34-10-00-860-004).
(6) Adjust the position of the aircraft until its lubber line points to the North with a deviation less than 2°.
NOTE: The lubber line is the north-south marking on the compensation base or the magnetic north value shown on the NDs.
C. Make sure that these circuit breakers are closed to get the radio/ magnetic environment that usually occurs in flight :
4. Procedure| PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| 49VU | NAV/ADF/1 | 1RP1 | H14 |
| ** ON A/C ALL | |||
| 49VU | NAV/VOR/1 | 2RS1 | G13 |
| 49VU | COM/VHF/1 | 2RC1 | G09 |
| ** ON A/C NOT FOR ALL | |||
| 49VU | HF1 | 1RE1 | HA14 |
| ** ON A/C NOT FOR ALL | |||
| 49VU | NAV PROBES/ADF/1 | 1RP1 | F09 |
| ** ON A/C NOT FOR ALL | |||
| 121VU | COM NAV/VHF/3 | 2RC3 | L05 |
| 121VU | COM NAV/VHF/2 | 2RC2 | L04 |
| ** ON A/C ALL | |||
| 121VU | COM NAV/VOR/2 | 2RS2 | K08 |
| ** ON A/C NOT FOR ALL | |||
| 121VU | COM NAV/ADF/2 | 1RP2 | K02 |
| ** ON A/C NOT FOR ALL | |||
| 121VU | COM/VHF/3 | 2RC3 | L05 |
| 121VU | COM/VHF/2 | 2RC2 | L04 |
| ** ON A/C NOT FOR ALL | |||
| 121VU | COM NAV/HF2 | 1RE2 | L13 |
Subtask 34-22-00-730-050-A ** ON A/C NOT FOR ALL
A.
(2) Set the aircraft to the Magnetic Heading North (MHN):
For example: if you must set the aircraft to the reference MHN at an airport with a magnetic variation of +3 degrees (3 degrees East), do as follows:
DN = MHN - CH
(b) The adjustment value (AV) is equal to the DN.
(c) Correct the CH indication with the AV to get the compensated compass heading.
(d) Put the SCREWDRIVER WIDTH 2 MM (0,23 IN) - NON MAGNETIC into the NS hole of the standby compass.
(e) Use the SCREWDRIVER WIDTH 2 MM (0,23 IN) - NON MAGNETIC to set the standby compass to the compensated compass heading.
Example:
1 If MHN = 360° and CH = 356°
DN = 360° - 356° = +4°
AV = +4
Correct the CH indication of the standby compass with the AV to get the compensated compass heading:
356° + 4 = 360°
2 If MHN = 0° and CH = 002°
DN = 0° - 2° = -2°
AV = -2°
Correct the CH indication of the standby compass with the AV to get the compensated compass heading:
2° +(-2°) = 0
(3) Set the aircraft to the Magnetic Heading East (MHE):
(a) Calculate and record the magnetic deviation (DE) between the MHE and the CH shown on the standby compass:
DE = MHE - CH
(b) The AV is equal to the DE.
(c) Correct the CH indication with the AV to get the compensated compass heading.
(d) Put the SCREWDRIVER WIDTH 2 MM (0,23 IN) - NON MAGNETIC into the EW hole of the standby compass.
(e) Use the SCREWDRIVER WIDTH 2 MM (0,23 IN) - NON MAGNETIC to set the standby compass to the compensated compass heading (refer to step 4.A.(2) to calculate the AV).
(4) Set the aircraft to the Magnetic Heading South (MHS):
(a) Calculate and record the magnetic deviation (DS) between the MHS and the CH shown on the standby compass:
DS = MHS - CH
(b) Correct the CH indication with the AV to get the compensated compass heading.
(c) Put the SCREWDRIVER WIDTH 2 MM (0,23 IN) - NON MAGNETIC into the NS hole of the standby compass.
(d) Use the SCREWDRIVER WIDTH 2 MM (0,23 IN) - NON MAGNETIC to set the standby compass to the compensated compass heading.
Example:
1 If MHS = 180° and CH = 174°
DS = 180° - 174° = +6°
Correct the CH indication of the standby compass with the AV to get the compensated compass heading.
174° + 3° = 177°
2 If MHS = 180° and CH = 182°
DS = 180° - 182° = -2°
Correct the CH indication of the standby compass with the AV to get the compensated compass heading.
182 + (-1) = 181
(5) Set the aircraft to the Magnetic Heading West (MHW):
(a) Calculate and record the magnetic deviation (DW) between the MHW and the CH shown on the standby compass:
DW = MHW - CH
(b) Correct the CH indication with the AV to get the compensated compass heading.
(c) Put the SCREWDRIVER WIDTH 2 MM (0,23 IN) - NON MAGNETIC into the EW hole of the standby compass.
(d) Use the SCREWDRIVER WIDTH 2 MM (0,23 IN) - NON MAGNETIC to set the standby compass to the compensated compass heading (refer to step 4.A.(4) to calculate the AV).
Subtask 34-22-00-730-067-A ** ON A/C NOT FOR ALL NOTE: The reference magnetic heading is equal to the true heading indication (read on the Control and Display Unit (CDU) of the Air Data/Inertial Reference System (ADIRS)), minus the magnetic variation of the airport (a natural condition which changes continuously). The magnetic variation is given in the approved airport charts.
NOTE: You cannot use the magnetic heading as a reference. To calculate it, the Air Data/Inertial Reference Unit (ADIRU) uses its magnetic variation table, which is not updated. Thus, for better precision, we recommend that you use the magnetic variation given for the approved airport charts.
(1) Below the display window, on the front face of the standby compass, remove and safety the protection cover of the compensator.(2) Set the aircraft to the Magnetic Heading North (MHN):
For example: if you must set the aircraft to the reference MHN at an airport with a magnetic variation of +3 degrees (3 degrees East), do as follows:
- Set the aircraft with the true heading:
True heading = MHN + magnetic variation of the airport (360° + 3° = 3°).
- Set the aircraft with the true heading:
True heading = MHN + Magnetic declination of the airport (360° + (-3°) = 357°).
DN = MHN - CH
(b) The adjustment value (AV) is equal to the DN.
(c) Correct the CH indication with the AV to get the compensated compass heading.
(d) Put the SCREWDRIVER WIDTH 2 MM (0,23 IN) - NON MAGNETIC into the NS hole of the standby compass.
(e) Use the SCREWDRIVER WIDTH 2 MM (0,23 IN) - NON MAGNETIC to set the standby compass to the compensated compass heading.
Example:
1 If MHN = 360° and CH = 356°
DN = 360° - 356° = +4°
AV = +4
Correct the CH indication of the standby compass with the AV to get the compensated compass heading:
356° + 4 = 360°
2 If MHN = 0° and CH = 002°
DN = 0° - 2° = -2°
AV = -2°
Correct the CH indication of the standby compass with the AV to get the compensated compass heading:
2° +(-2°) = 0
(3) Set the aircraft to the Magnetic Heading East (MHE):
(a) Calculate and record the magnetic deviation (DE) between the MHE and the CH shown on the standby compass:
DE = MHE - CH
(b) The AV is equal to the DE.
(c) Correct the CH indication with the AV to get the compensated compass heading.
(d) Put the SCREWDRIVER WIDTH 2 MM (0,23 IN) - NON MAGNETIC into the EW hole of the standby compass.
(e) Use the SCREWDRIVER WIDTH 2 MM (0,23 IN) - NON MAGNETIC to set the standby compass to the compensated compass heading (refer to step 4.A.(2) to calculate the AV).
(4) Set the aircraft to the Magnetic Heading South (MHS):
(a) Calculate and record the magnetic deviation (DS) between the MHS and the CH shown on the standby compass:
DS = MHS - CH
| ------------- |
| ! DS ! |
| ! AV = -- ! |
| ! 2 ! |
| ------------- |
(b) Correct the CH indication with the AV to get the compensated compass heading.
(c) Put the SCREWDRIVER WIDTH 2 MM (0,23 IN) - NON MAGNETIC into the NS hole of the standby compass.
(d) Use the SCREWDRIVER WIDTH 2 MM (0,23 IN) - NON MAGNETIC to set the standby compass to the compensated compass heading.
Example:
1 If MHS = 180° and CH = 174°
DS = 180° - 174° = +6°
| ----------------------- |
| ! DS 6 ! |
| ! AV = -- = + - = +3 ! |
| ! 2 2 ! |
| ----------------------- |
Correct the CH indication of the standby compass with the AV to get the compensated compass heading.
174° + 3° = 177°
2 If MHS = 180° and CH = 182°
DS = 180° - 182° = -2°
| ----------------------- |
| ! DS 2 ! |
| ! AV = -- = - - = -1 ! |
| ! 2 2 ! |
| ----------------------- |
Correct the CH indication of the standby compass with the AV to get the compensated compass heading.
182 + (-1) = 181
(5) Set the aircraft to the Magnetic Heading West (MHW):
(a) Calculate and record the magnetic deviation (DW) between the MHW and the CH shown on the standby compass:
DW = MHW - CH
| ------------- |
| ! DW ! |
| ! AV = -- ! |
| ! 2 ! |
| ------------- |
(b) Correct the CH indication with the AV to get the compensated compass heading.
(c) Put the SCREWDRIVER WIDTH 2 MM (0,23 IN) - NON MAGNETIC into the EW hole of the standby compass.
(d) Use the SCREWDRIVER WIDTH 2 MM (0,23 IN) - NON MAGNETIC to set the standby compass to the compensated compass heading (refer to step 4.A.(4) to calculate the AV).
B.
For example: if you must set the aircraft to the reference MHN at an airport with a magnetic variation of +3 degrees (3 degrees East), do as follows:
DN = MHN - CH
(b) The adjustment value (AV) is equal to the DN.
(c) Correct the CH indication with the AV to get the compensated compass heading.
(d) Put the CE2-40 KEY-CORRECTOR into hole C of the standby compass.
(e) Use the CE2-40 KEY-CORRECTOR to set the standby compass to the compensated compass heading.
Example:
1 If MHN = 360° and CH = 356°
DN = 360° - 356° = +4°
AV = +4
Correct the CH indication of the standby compass with the AV to get the compensated compass heading:
356° + 4 = 360°
2 If MHN = 0° and CH = 002°
DN = 0° - 2° = -2°
AV = -2°
Correct the CH indication of the standby compass with the AV to get the compensated compass heading:
2° +(-2°) = 0
(2) Set the aircraft to the Magnetic Heading East (MHE):
(a) Calculate and record the magnetic deviation (DE) between the MHE and the CH shown on the standby compass:
DE = MHE - CH
(b) The AV is equal to the DE.
(c) Correct the CH indication with the AV to get the compensated compass heading.
(d) Put the CE2-40 KEY-CORRECTOR into hole B of the standby compass.
(e) Use the CE2-40 KEY-CORRECTOR to set the standby compass to the compensated compass heading (refer to step 4.B.(1) to calculate the AV).
(3) Set the aircraft to the Magnetic Heading South (MHS):
(a) Calculate and record the magnetic deviation (DS) between the MHS and the CH shown on the standby compass:
DS = MHS - CH
(b) Correct the CH indication with the AV to get the compensated compass heading.
(c) Put the CE2-40 KEY-CORRECTOR into hole C of the standby compass.
(d) Use the CE2-40 KEY-CORRECTOR to set the standby compass to the compensated compass heading.
Example:
1 If MHS = 180° and CH = 174°
DS = 180° - 174° = +6°
Correct the CH indication of the standby compass with the AV to get the compensated compass heading:
174° + 3° = 177°
2 If MHS = 180° and CH = 182°
DS = 180° - 182° = -2°
Correct the CH indication of the standby compass with the AV to get the compensated compass heading:
182 + (-1) = 181
(4) Set the aircraft to the Magnetic Heading West (MHW):
(a) Calculate and record the magnetic deviation (DW) between the MHW and the CH shown on the standby compass:
DW = MHW - CH
(b) Correct the CH indication with the AV to get the compensated compass heading.
(c) Put the CE2-40 KEY-CORRECTOR into hole B of the standby compass.
(d) Use the CE2-40 KEY-CORRECTOR to set the standby compass to the compensated compass heading (refer to step 4.B.(3) to calculate the AV).
Subtask 34-22-00-730-050-B ** ON A/C NOT FOR ALL NOTE: To do this test, you can use the CE2-40 KEY-CORRECTOR or a standard non-magnetic screwdriver.
NOTE: The reference magnetic heading is equal to the true heading indication (read on the Control and Display Unit (CDU) of the Air Data/Inertial Reference System (ADIRS)), minus the magnetic variation of the airport (a natural condition which changes continuously). The magnetic variation is given in the approved airport charts.
NOTE: You cannot use the magnetic heading as a reference. To calculate it, the Air Data/Inertial Reference Unit (ADIRU) uses its magnetic variation table, which is not updated. Thus, for better precision, we recommend that you use the magnetic variation given for the approved airport charts.
(1) Set the aircraft to the Magnetic Heading North (MHN): For example: if you must set the aircraft to the reference MHN at an airport with a magnetic variation of +3 degrees (3 degrees East), do as follows:
- Set the aircraft with the true heading:
True heading = MHN + Magnetic variation of the airport (360° + 3° = 3°).
- Set the aircraft with the true heading:
True heading = MHN + Magnetic declination of the airport (360° + (-3°) = 357°).
DN = MHN - CH
(b) The adjustment value (AV) is equal to the DN.
(c) Correct the CH indication with the AV to get the compensated compass heading.
(d) Put the CE2-40 KEY-CORRECTOR into hole C of the standby compass.
(e) Use the CE2-40 KEY-CORRECTOR to set the standby compass to the compensated compass heading.
Example:
1 If MHN = 360° and CH = 356°
DN = 360° - 356° = +4°
AV = +4
Correct the CH indication of the standby compass with the AV to get the compensated compass heading:
356° + 4 = 360°
2 If MHN = 0° and CH = 002°
DN = 0° - 2° = -2°
AV = -2°
Correct the CH indication of the standby compass with the AV to get the compensated compass heading:
2° +(-2°) = 0
(2) Set the aircraft to the Magnetic Heading East (MHE):
(a) Calculate and record the magnetic deviation (DE) between the MHE and the CH shown on the standby compass:
DE = MHE - CH
(b) The AV is equal to the DE.
(c) Correct the CH indication with the AV to get the compensated compass heading.
(d) Put the CE2-40 KEY-CORRECTOR into hole B of the standby compass.
(e) Use the CE2-40 KEY-CORRECTOR to set the standby compass to the compensated compass heading (refer to step 4.B.(1) to calculate the AV).
(3) Set the aircraft to the Magnetic Heading South (MHS):
(a) Calculate and record the magnetic deviation (DS) between the MHS and the CH shown on the standby compass:
DS = MHS - CH
| ------------ |
| ! DS ! |
| ! AV = -- ! |
| ! 2 ! |
| ------------ |
(b) Correct the CH indication with the AV to get the compensated compass heading.
(c) Put the CE2-40 KEY-CORRECTOR into hole C of the standby compass.
(d) Use the CE2-40 KEY-CORRECTOR to set the standby compass to the compensated compass heading.
Example:
1 If MHS = 180° and CH = 174°
DS = 180° - 174° = +6°
| ----------------------- |
| ! DS 6 ! |
| ! AV = -- = + - = +3 ! |
| ! 2 2 ! |
| ----------------------- |
Correct the CH indication of the standby compass with the AV to get the compensated compass heading:
174° + 3° = 177°
2 If MHS = 180° and CH = 182°
DS = 180° - 182° = -2°
| ----------------------- |
| ! DS 2 ! |
| ! AV = -- = - - = -1 ! |
| ! 2 2 ! |
| ----------------------- |
Correct the CH indication of the standby compass with the AV to get the compensated compass heading:
182 + (-1) = 181
(4) Set the aircraft to the Magnetic Heading West (MHW):
(a) Calculate and record the magnetic deviation (DW) between the MHW and the CH shown on the standby compass:
DW = MHW - CH
| ------------ |
| ! DW ! |
| ! AV = -- ! |
| ! 2 ! |
| ------------ |
(b) Correct the CH indication with the AV to get the compensated compass heading.
(c) Put the CE2-40 KEY-CORRECTOR into hole B of the standby compass.
(d) Use the CE2-40 KEY-CORRECTOR to set the standby compass to the compensated compass heading (refer to step 4.B.(3) to calculate the AV).
C.
(2) Set the aircraft to the Magnetic Heading North (MHN):
For example: if you must set the aircraft to the reference MHN at an airport with a magnetic variation of +3 degrees (3 degrees East), do as follows:
DN = MHN - CH
(b) The adjustment value (AV) is equal to the DN.
(c) Correct the CH indication with the AV to get the compensated compass heading.
(d) Put the SCREWDRIVER WIDTH 2 MM (0,23 IN) - NON MAGNETIC into the NS hole of the standby compass.
(e) Use the SCREWDRIVER WIDTH 2 MM (0,23 IN) - NON MAGNETIC to set the standby compass to the compensated compass heading.
Example:
1 If MHN = 360° and CH = 356°
DN = 360° - 356° = +4°
AV = +4
Correct the CH indication of the standby compass with the AV to get the compensated compass heading:
356° + 4 = 360°
2 If MHN = 0° and CH = 002°
DN = 0° - 2° = -2°
AV = -2°
Correct the CH indication of the standby compass with the AV to get the compensated compass heading:
2° +(-2°) = 0
(3) Set the aircraft to the Magnetic heading East (MHE):
(a) Calculate and record the magnetic deviation (DE) between the MHE and the CH indication shown on the standby compass:
DE = MHE - CH
(b) The AV is equal to the DE.
(c) Correct the CH indication with the AV to get the compensated compass heading.
(d) Put the SCREWDRIVER WIDTH 2 MM (0,23 IN) - NON MAGNETIC into the EW hole of the standby compass.
(e) Use the SCREWDRIVER WIDTH 2 MM (0,23 IN) - NON MAGNETIC to set the standby compass to the compensated compass heading (refer to step 4.A.(2) to calculate AV).
(4) Set the aircraft to the Magnetic Heading South (MHS):
(a) Calculate and record the magnetic deviation (DS) between the MHS and the CH indication shown on the standby compass:
DS = MHS - CH
(b) Correct the CH indication with the AV to get the compensated compass heading.
(c) Put the SCREWDRIVER WIDTH 2 MM (0,23 IN) - NON MAGNETIC into the NS hole of the standby compass.
(d) Use the SCREWDRIVER WIDTH 2 MM (0,23 IN) - NON MAGNETIC to set the standby compass to the compensated compass heading.
Example:
1 If MHS = 180° and CH = 174°
DS = 180° - 174° = +6°
Correct the CH indication of the standby compass with the AV to get the compensated compass heading.
174° + 3° = 177°
2 If MHS = 180° and CH = 182°
DS = 180° - 182° = -2°
Correct the CH indication of the standby compass with the AV to get the compensated compass heading.
182 + (-1) = 181
(5) Set the aircraft to the Magnetic Heading West (MHW):
(a) Calculate and record the magnetic deviation (DW) between the MHW and the CH indication shown on the standby compass:
DW = MHW - CH
(b) Correct the CH indication with AV to get the compensated compass heading.
(c) Put the SCREWDRIVER WIDTH 2 MM (0,23 IN) - NON MAGNETIC into the EW hole of the standby compass.
(d) Use the SCREWDRIVER WIDTH 2 MM (0,23 IN) - NON MAGNETIC to set the standby compass to the compensated compass heading (refer to step 4.A.(4) to calculate the AV).
Subtask 34-22-00-730-067-B ** ON A/C NOT FOR ALL NOTE: The reference magnetic heading is equal to the true heading indication (read on the IRS MONITOR page), minus the magnetic variation of the airport (a natural condition which changes continuously). The magnetic variation is given in the approved airport charts.
NOTE: You cannot use the magnetic heading as a reference. To calculate it, the Air Data/Inertial Reference Unit (ADIRU) uses its magnetic variation table, which is not updated. Thus, for better precision, we recommend that you use the magnetic variation given for the approved airport charts.
NOTE: You can get access to the IRS MONITOR page from the Multipurpose Control and Display Unit (MCDU).
(1) Below the display window, on the front face of the standby compass, remove and safety the protection cover of the compensator. (2) Set the aircraft to the Magnetic Heading North (MHN):
For example: if you must set the aircraft to the reference MHN at an airport with a magnetic variation of +3 degrees (3 degrees East), do as follows:
- Set the aircraft with the true heading:
True heading = MHN + magnetic variation of the airport (360° + 3° = 3°).
One more example: if you must set the aircraft to the reference MHN at an airport with a magnetic declination of -3 degrees (3 degrees West), do as follows: - Set the aircraft with the true heading:
True heading = MHN + Magnetic declination of the airport (360° + (-3°) = 357°).
DN = MHN - CH
(b) The adjustment value (AV) is equal to the DN.
(c) Correct the CH indication with the AV to get the compensated compass heading.
(d) Put the SCREWDRIVER WIDTH 2 MM (0,23 IN) - NON MAGNETIC into the NS hole of the standby compass.
(e) Use the SCREWDRIVER WIDTH 2 MM (0,23 IN) - NON MAGNETIC to set the standby compass to the compensated compass heading.
Example:
1 If MHN = 360° and CH = 356°
DN = 360° - 356° = +4°
AV = +4
Correct the CH indication of the standby compass with the AV to get the compensated compass heading:
356° + 4 = 360°
2 If MHN = 0° and CH = 002°
DN = 0° - 2° = -2°
AV = -2°
Correct the CH indication of the standby compass with the AV to get the compensated compass heading:
2° +(-2°) = 0
(3) Set the aircraft to the Magnetic heading East (MHE):
(a) Calculate and record the magnetic deviation (DE) between the MHE and the CH indication shown on the standby compass:
DE = MHE - CH
(b) The AV is equal to the DE.
(c) Correct the CH indication with the AV to get the compensated compass heading.
(d) Put the SCREWDRIVER WIDTH 2 MM (0,23 IN) - NON MAGNETIC into the EW hole of the standby compass.
(e) Use the SCREWDRIVER WIDTH 2 MM (0,23 IN) - NON MAGNETIC to set the standby compass to the compensated compass heading (refer to step 4.A.(2) to calculate AV).
(4) Set the aircraft to the Magnetic Heading South (MHS):
(a) Calculate and record the magnetic deviation (DS) between the MHS and the CH indication shown on the standby compass:
DS = MHS - CH
| ------------ |
| ! DS ! |
| ! AV = -- ! |
| ! 2 ! |
| ------------ |
(b) Correct the CH indication with the AV to get the compensated compass heading.
(c) Put the SCREWDRIVER WIDTH 2 MM (0,23 IN) - NON MAGNETIC into the NS hole of the standby compass.
(d) Use the SCREWDRIVER WIDTH 2 MM (0,23 IN) - NON MAGNETIC to set the standby compass to the compensated compass heading.
Example:
1 If MHS = 180° and CH = 174°
DS = 180° - 174° = +6°
| ----------------------- |
| ! DS 6 ! |
| ! AV = -- = + - = +3 ! |
| ! 2 2 ! |
| ----------------------- |
Correct the CH indication of the standby compass with the AV to get the compensated compass heading.
174° + 3° = 177°
2 If MHS = 180° and CH = 182°
DS = 180° - 182° = -2°
| ----------------------- |
| ! DS 2 ! |
| ! AV = -- = - - = -1 ! |
| ! 2 2 ! |
| ----------------------- |
Correct the CH indication of the standby compass with the AV to get the compensated compass heading.
182 + (-1) = 181
(5) Set the aircraft to the Magnetic Heading West (MHW):
(a) Calculate and record the magnetic deviation (DW) between the MHW and the CH indication shown on the standby compass:
DW = MHW - CH
| -------------- |
| ! DW ! |
| ! AV = -- ! |
| ! 2 ! |
| -------------- |
(b) Correct the CH indication with AV to get the compensated compass heading.
(c) Put the SCREWDRIVER WIDTH 2 MM (0,23 IN) - NON MAGNETIC into the EW hole of the standby compass.
(d) Use the SCREWDRIVER WIDTH 2 MM (0,23 IN) - NON MAGNETIC to set the standby compass to the compensated compass heading (refer to step 4.A.(4) to calculate the AV).
D.
For example: if you must set the aircraft to the reference MHN at an airport with a magnetic variation of +3 degrees (3 degrees East), do as follows:
DN = MHN - CH
(b) The adjustment value (AV) is equal to the DN.
(c) Correct the CH indication with the AV to get the compensated compass heading.
(d) Put the CE2-40 KEY-CORRECTOR into hole C of the standby compass.
(e) Use the CE2-40 KEY-CORRECTOR to set the standby compass to the compensated compass heading.
Example:
1 If MHN = 360° and CH = 356°
DN = 360° - 356° = +4°
AV = +4
Correct the CH indication of the standby compass with the AV to get the compensated compass heading:
356° + 4 = 360°
2 If MHN = 0° and CH = 002°
DN = 0° - 2° = -2°
AV = -2°
Correct the CH indication of the standby compass with the AV to get the compensated compass heading:
2° +(-2°) = 0
(2) Set the aircraft to the Magnetic Heading East (MHE):
(a) Calculate and record the magnetic deviation (DE) between the MHE and the CH indication shown on the standby compass:
DE = MHE - CH
(b) The AV is equal to the DE.
(c) Correct the CH indication with the AV to get the compensated compass heading.
(d) Put the CE2-40 KEY-CORRECTOR into hole B of the standby compass.
(e) Use the CE2-40 KEY-CORRECTOR to set the standby compass to the compensated compass heading (refer to step 4.B.(1) to calculate AV).
(3) Set the aircraft to the Magnetic Heading South (MHS):
(a) Calculate and record the magnetic deviation (DS) between the MHS and the CH indication shown on the standby compass:
DS = MHS - CH
(b) Correct the CH indication with the AV to get the compensated compass heading.
(c) Put the CE2-40 KEY-CORRECTOR into hole C of the standby compass.
(d) Use the CE2-40 KEY-CORRECTOR to set the standby compass to the compensated compass heading.
Example:
1 If MHS = 180° and CH = 174°
DS = 180° - 174° = +6°
Correct the CH indication of the standby compass with the AV to get the compensated compass heading:
174° + 3° = 177°
2 If MHS = 180° and CH = 182°
DS = 180° - 182° = -2°
Correct the CH indication of the standby compass with the AV to get the compensated compass heading:
182 + (-1) = 181
(4) Set the aircraft to the Magnetic Heading West (MHW):
(a) Calculate and record the magnetic deviation (DW) between the MHW and the CH indication shown on the standby compass.
DW = MHW - CH
(b) Correct the CH indication with the AV to get the compensated compass heading.
(c) Put the CE2-40 KEY-CORRECTOR into hole B of the standby compass.
(d) Use the CE2-40 KEY-CORRECTOR to set the standby compass to the compensated compass heading (refer to step 4.B.(3) to calculate the AV).
Subtask 34-22-00-730-051-A ** ON A/C NOT FOR ALL NOTE: The reference magnetic heading is equal to the true heading indication (read on the IRS MONITOR page), minus the magnetic variation of the airport (a natural condition which changes continuously). The magnetic variation is given in the approved airport charts.
NOTE: You cannot use the magnetic heading as a reference. To calculate it, the Air Data/Inertial Reference Unit (ADIRU) uses its magnetic variation table, which is not updated. Thus, for better precision, we recommend that you use the magnetic variation given for the approved airport charts.
NOTE: You can get access to the IRS MONITOR page from the Multipurpose Control and Display Unit (MCDU).
(1) Set the aircraft to the Magnetic Heading North (MHN): For example: if you must set the aircraft to the reference MHN at an airport with a magnetic variation of +3 degrees (3 degrees East), do as follows:
- Set the aircraft with the true heading:
True heading = MHN + magnetic variation of the airport (360° + 3° = 3°).
One more example: if you must set the aircraft to the reference MHN at an airport with a magnetic declination of -3 degrees (3 degrees West), do as follows: - Set the aircraft with the true heading:
True heading = MHN + Magnetic declination of the airport (360° + (-3°) = 357°).
DN = MHN - CH
(b) The adjustment value (AV) is equal to the DN.
(c) Correct the CH indication with the AV to get the compensated compass heading.
(d) Put the CE2-40 KEY-CORRECTOR into hole C of the standby compass.
(e) Use the CE2-40 KEY-CORRECTOR to set the standby compass to the compensated compass heading.
Example:
1 If MHN = 360° and CH = 356°
DN = 360° - 356° = +4°
AV = +4
Correct the CH indication of the standby compass with the AV to get the compensated compass heading:
356° + 4 = 360°
2 If MHN = 0° and CH = 002°
DN = 0° - 2° = -2°
AV = -2°
Correct the CH indication of the standby compass with the AV to get the compensated compass heading:
2° +(-2°) = 0
(2) Set the aircraft to the Magnetic Heading East (MHE):
(a) Calculate and record the magnetic deviation (DE) between the MHE and the CH indication shown on the standby compass:
DE = MHE - CH
(b) The AV is equal to the DE.
(c) Correct the CH indication with the AV to get the compensated compass heading.
(d) Put the CE2-40 KEY-CORRECTOR into hole B of the standby compass.
(e) Use the CE2-40 KEY-CORRECTOR to set the standby compass to the compensated compass heading (refer to step 4.B.(1) to calculate AV).
(3) Set the aircraft to the Magnetic Heading South (MHS):
(a) Calculate and record the magnetic deviation (DS) between the MHS and the CH indication shown on the standby compass:
DS = MHS - CH
| --------------- |
| ! DS ! |
| ! AV = -- ! |
| ! 2 ! |
| --------------- |
(b) Correct the CH indication with the AV to get the compensated compass heading.
(c) Put the CE2-40 KEY-CORRECTOR into hole C of the standby compass.
(d) Use the CE2-40 KEY-CORRECTOR to set the standby compass to the compensated compass heading.
Example:
1 If MHS = 180° and CH = 174°
DS = 180° - 174° = +6°
| ----------------------- |
| ! DS 6 ! |
| ! AV = -- = + - = +3 ! |
| ! 2 2 ! |
| ----------------------- |
Correct the CH indication of the standby compass with the AV to get the compensated compass heading:
174° + 3° = 177°
2 If MHS = 180° and CH = 182°
DS = 180° - 182° = -2°
| ----------------------- |
| ! DS 2 ! |
| ! AV = -- = - - = -1 ! |
| ! 2 2 ! |
| ----------------------- |
Correct the CH indication of the standby compass with the AV to get the compensated compass heading:
182 + (-1) = 181
(4) Set the aircraft to the Magnetic Heading West (MHW):
(a) Calculate and record the magnetic deviation (DW) between the MHW and the CH indication shown on the standby compass.
DW = MHW - CH
| --------------- |
| ! DW ! |
| ! AV = -- ! |
| ! 2 ! |
| --------------- |
(b) Correct the CH indication with the AV to get the compensated compass heading.
(c) Put the CE2-40 KEY-CORRECTOR into hole B of the standby compass.
(d) Use the CE2-40 KEY-CORRECTOR to set the standby compass to the compensated compass heading (refer to step 4.B.(3) to calculate the AV).
E. Find the deviation curve
(2) Set the aircraft to the 12 magnetic headings, one after the other, to find the deviation curve:
0°, 30°, 60°, 90°, 120°, 150°, 180°, 210°, 240°, 270°, 300°, 330°.
For example, in an airport with a magnetic variation of - 3 degrees (3 degrees West), you must set the aircraft with the true heading on the IR MONITOR page as follows:
To prevent many aircraft maneuvers, a tolerance of one degree is permitted for each heading.
A correction of this tolerance occurs when the standby compass heading is compared with the reference magnetic heading.
(3) Record the values of the standby compass and of the reference magnetic heading (true heading read on the IRS MONITOR page minus the magnetic variation of the airport) for each aircraft position.
(4) Calculate the remaining deviation values R(°):
R(°) = Reference Magnetic Heading - Indication of the standby compass.
For example, refer to Table 2 that follows if the magnetic variation of an airport is - 3 degrees (3 degrees West):
(5) Make sure that:
(7)
Subtask 34-22-00-730-051-C ** ON A/C NOT FOR ALL NOTE: The reference magnetic heading is equal to the true heading indication (read on the Control and Display Unit (CDU) of the Air Data/Inertial Reference System (ADIRS)), minus the magnetic variation of the airport (a natural condition which changes continuously). The magnetic variation is given in the approved airport charts.
Magnetic heading = True heading - (Magnetic variation of the airport).
Magnetic heading = True heading - (Magnetic variation of the airport).
NOTE: During the adjustment procedure, the standby compass turns 360 degrees.
(1) Make sure that there is no damage to the letters and graduations on the standby compass card. (2) Set the aircraft to the 12 magnetic headings, one after the other, to find the deviation curve:
0°, 30°, 60°, 90°, 120°, 150°, 180°, 210°, 240°, 270°, 300°, 330°.
For example, in an airport with a magnetic variation of - 3 degrees (3 degrees West), you must set the aircraft with the true heading on the IR MONITOR page as follows:
| Reference values | True Heading read on the ADIRS CDU |
|---|---|
| 0° | 357° |
| 30° | 27° |
| 60° | 57° |
| 90° | 87° |
| 120° | 117° |
| 150° | 147° |
| 180° | 177° |
| 210° | 207° |
| 240° | 237° |
| 270° | 267° |
| 300° | 297° |
| 330° | 327° |
A correction of this tolerance occurs when the standby compass heading is compared with the reference magnetic heading.
(3) Record the values of the standby compass and of the reference magnetic heading (true heading read on the IRS MONITOR page minus the magnetic variation of the airport) for each aircraft position.
(4) Calculate the remaining deviation values R(°):
R(°) = Reference Magnetic Heading - Indication of the standby compass.
For example, refer to Table 2 that follows if the magnetic variation of an airport is - 3 degrees (3 degrees West):
| Reference Magnetic Heading | True Heading read on the ADIRS CDU | Compass indication (example values) | R (example values) |
|---|---|---|---|
| 0° | 357° | 3° | -3° |
| 30° | 27° | 28° | 2° |
| 60° | 57° | 62° | -2° |
| 90° | 87° | 88° | 2° |
| 120° | 117° | 119° | 1° |
| 150° | 147° | 151° | -1° |
| 180° | 177° | 179° | 1° |
| 210° | 207° | 212° | -2° |
| 240° | 237° | 241° | -1° |
| 270° | 267° | 273° | -3° |
| 300° | 297° | 298° | 2° |
| 330° | 327° | 332° | -2° |
- The remaining deviation values R(°) are not more than + or - 8 degrees for each magnetic heading.
- The maximum range between the positive and negative deviation values R(°) is not more than ten degrees.
- The difference between each magnetic heading value on the standby compass and the reference magnetic heading is not more than eight degrees. If the difference is more than eight degrees, adjust the compensation.
(7)
E. Find the Deviation Curve
(2) Set the aircraft to the 12 magnetic headings, one after the other, to find the deviation curve:
0°, 30°, 60°, 90°, 120°, 150°, 180°, 210°, 240°, 270°, 300°, 330°.
For example, in an airport with a magnetic variation of - 3 degrees (3 degrees West), you must set the aircraft with the true heading on the IRS MONITOR page as follows:
To prevent many aircraft maneuvers, a tolerance of one degree is permitted for each heading.
A correction of this tolerance occurs when the standby compass heading is compared with the reference magnetic heading.
(3) Record the values of the standby compass and of the reference magnetic heading (true heading read on the IRS MONITOR page minus the magnetic variation of the airport) for each aircraft position.
(4) Calculate the remaining deviation values R(°):
R(°) = Reference Magnetic Heading - Indication of the standby compass.
For example, refer to Table 4 that follows if the magnetic variation of an airport is - 3 degrees (3 degrees West):
(5) Make sure that:
(7)
5. Close-upNOTE: The reference magnetic heading is equal to the true heading indication (read on the IRS MONITOR page), minus the magnetic variation of the airport (a natural condition which changes continuously). The magnetic variation is given in the approved airport charts.
Magnetic heading = True heading - (Magnetic variation of the airport).
Magnetic heading = True heading - (Magnetic variation of the airport).
NOTE: During the adjustment procedure, the standby compass turns 360 degrees.
(1) Make sure that there is no damage to the letters and graduations on the standby compass card. (2) Set the aircraft to the 12 magnetic headings, one after the other, to find the deviation curve:
0°, 30°, 60°, 90°, 120°, 150°, 180°, 210°, 240°, 270°, 300°, 330°.
For example, in an airport with a magnetic variation of - 3 degrees (3 degrees West), you must set the aircraft with the true heading on the IRS MONITOR page as follows:
| Reference values | True Heading read on the IRS MONITOR page |
|---|---|
| 0° | 357° |
| 30° | 27° |
| 60° | 57° |
| 90° | 87° |
| 120° | 117° |
| 150° | 147° |
| 180° | 177° |
| 210° | 207° |
| 240° | 237° |
| 270° | 267° |
| 300° | 297° |
| 330° | 327° |
A correction of this tolerance occurs when the standby compass heading is compared with the reference magnetic heading.
(3) Record the values of the standby compass and of the reference magnetic heading (true heading read on the IRS MONITOR page minus the magnetic variation of the airport) for each aircraft position.
(4) Calculate the remaining deviation values R(°):
R(°) = Reference Magnetic Heading - Indication of the standby compass.
For example, refer to Table 4 that follows if the magnetic variation of an airport is - 3 degrees (3 degrees West):
| Reference Magnetic Heading | True Heading read on the IRS MONITOR page | Compass indication (example values) | R (example values) |
|---|---|---|---|
| 0° | 357° | 3° | -3° |
| 30° | 27° | 28° | 2° |
| 60° | 57° | 62° | -2° |
| 90° | 87° | 88° | 2° |
| 120° | 117° | 119° | 1° |
| 150° | 147° | 151° | -1° |
| 180° | 177° | 179° | 1° |
| 210° | 207° | 212° | -2° |
| 240° | 237° | 241° | -1° |
| 270° | 267° | 273° | -3° |
| 300° | 297° | 298° | 2° |
| 330° | 327° | 332° | -2° |
- The remaining deviation values R(°) are not more than + or - 8 degrees for each magnetic heading.
- The maximum range between the positive and negative deviation values R(°) is not more than ten degrees.
- The difference between each magnetic heading value on the standby compass and the reference magnetic heading is not more than eight degrees. If the difference is more than eight degrees, adjust the compensation.
(7)
Subtask 34-22-00-860-053-A ** ON A/C NOT FOR ALL
A. Put the aircraft back to its initial configuration.
(For aircraft fitted with standby compass P/N C5K).
(1) Do the EIS stop procedure (Ref. AMM TASK 31-60-00-860-002).
(2) Do the ADIRS stop procedure (Ref. AMM TASK 34-10-00-860-005).
(3) Install the protection cover on the compensator.
(4) If necessary, stop the engines (Ref. AMM TASK 71-00-00-710-018).
(5) Put the aircraft back to the serviceable condition.
(6) Remove the ground support and maintenance equipment, the special and standard tools and all other items.
Subtask 34-22-00-860-068-A ** ON A/C NOT FOR ALL (For aircraft fitted with standby compass P/N C5K).
(1) Do the EIS stop procedure (Ref. AMM TASK 31-60-00-860-002).
(2) Do the ADIRS stop procedure (Ref. AMM TASK 34-10-00-860-005).
(3) Install the protection cover on the compensator.
(4) If necessary, stop the engines (Ref. AMM TASK 71-00-00-710-018).
(5) Put the aircraft back to the serviceable condition.
(6) Remove the ground support and maintenance equipment, the special and standard tools and all other items.
B. Put the aircraft back to its initial configuration.
(For aircraft fitted with standby compass P/N PGA0105W).
(1) Do the EIS stop procedure (Ref. AMM TASK 31-60-00-860-002).
(2) Do the ADIRS stop procedure (Ref. AMM TASK 34-10-00-860-005).
(3) If necessary, stop the engines (Ref. AMM TASK 71-00-00-710-018).
(4) Put the aircraft back to the serviceable condition.
(5) Remove the ground support and maintenance equipment, the special and standard tools and all other items.
Subtask 34-22-00-860-053-C ** ON A/C NOT FOR ALL (For aircraft fitted with standby compass P/N PGA0105W).
(1) Do the EIS stop procedure (Ref. AMM TASK 31-60-00-860-002).
(2) Do the ADIRS stop procedure (Ref. AMM TASK 34-10-00-860-005).
(3) If necessary, stop the engines (Ref. AMM TASK 71-00-00-710-018).
(4) Put the aircraft back to the serviceable condition.
(5) Remove the ground support and maintenance equipment, the special and standard tools and all other items.
C. Put the aircraft back to its initial configuration.
(for aircraft fitted with standby compass P/N C5K).
(1) Do the EIS stop procedure (Ref. AMM TASK 31-60-00-860-002).
(2) Do the ADIRS stop procedure (Ref. AMM TASK 34-10-00-860-005).
(3) Install the protection cover on the compensator.
(4) If necessary, stop the engines (Ref. AMM TASK 71-00-00-710-028).
(5) Put the aircraft back to the serviceable condition.
(6) Remove the ground support and maintenance equipment, the special and standard tools and all other items.
Subtask 34-22-00-860-068-D ** ON A/C NOT FOR ALL (for aircraft fitted with standby compass P/N C5K).
(1) Do the EIS stop procedure (Ref. AMM TASK 31-60-00-860-002).
(2) Do the ADIRS stop procedure (Ref. AMM TASK 34-10-00-860-005).
(3) Install the protection cover on the compensator.
(4) If necessary, stop the engines (Ref. AMM TASK 71-00-00-710-028).
(5) Put the aircraft back to the serviceable condition.
(6) Remove the ground support and maintenance equipment, the special and standard tools and all other items.
D. Put the aircraft back to its initial configuration.
(for aircraft fitted with standby compass P/N PGA0105W).
(1) Do the EIS stop procedure (NDs only) (Ref. AMM TASK 31-60-00-860-002).
(2) Do the ADIRS stop procedure (Ref. AMM TASK 34-10-00-860-005).
(3) If necessary, stop the engines (Ref. AMM TASK 71-00-00-710-028).
(4) Put the aircraft back to the serviceable condition.
(5) Remove the ground support and maintenance equipment, the special and standard tools and all other items.
Subtask 34-22-00-860-053-D ** ON A/C NOT FOR ALL (for aircraft fitted with standby compass P/N PGA0105W).
(1) Do the EIS stop procedure (NDs only) (Ref. AMM TASK 31-60-00-860-002).
(2) Do the ADIRS stop procedure (Ref. AMM TASK 34-10-00-860-005).
(3) If necessary, stop the engines (Ref. AMM TASK 71-00-00-710-028).
(4) Put the aircraft back to the serviceable condition.
(5) Remove the ground support and maintenance equipment, the special and standard tools and all other items.
E. Put the aircraft back to its initial configuration.
(For aircraft fitted with standby compass P/N C5K).
(1) Do the EIS stop procedure (Ref. AMM TASK 31-60-00-860-002).
(2) Do the ADIRS stop procedure (Ref. AMM TASK 34-10-00-860-005).
(3) Install the protection cover on the compensator.
(4) If necessary, stop the engines (Ref. AMM TASK 71-00-00-860-814).
(5) Put the aircraft back to the serviceable condition.
(6) Remove the ground support and maintenance equipment, the special and standard tools and all other items.
Subtask 34-22-00-860-068-E ** ON A/C NOT FOR ALL (For aircraft fitted with standby compass P/N C5K).
(1) Do the EIS stop procedure (Ref. AMM TASK 31-60-00-860-002).
(2) Do the ADIRS stop procedure (Ref. AMM TASK 34-10-00-860-005).
(3) Install the protection cover on the compensator.
(4) If necessary, stop the engines (Ref. AMM TASK 71-00-00-860-814).
(5) Put the aircraft back to the serviceable condition.
(6) Remove the ground support and maintenance equipment, the special and standard tools and all other items.
F. Put the aircraft back to its initial configuration.
(For aircraft fitted with standby compass P/N PGA0105W).
(1) Do the EIS stop procedure (Ref. AMM TASK 31-60-00-860-002).
(2) Do the ADIRS stop procedure (Ref. AMM TASK 34-10-00-860-005).
(3) If necessary, stop the engines (Ref. AMM TASK 71-00-00-860-814).
(4) Put the aircraft back to the serviceable condition.
(5) Remove the ground support and maintenance equipment, the special and standard tools and all other items.
Subtask 34-22-00-862-050-A (For aircraft fitted with standby compass P/N PGA0105W).
(1) Do the EIS stop procedure (Ref. AMM TASK 31-60-00-860-002).
(2) Do the ADIRS stop procedure (Ref. AMM TASK 34-10-00-860-005).
(3) If necessary, stop the engines (Ref. AMM TASK 71-00-00-860-814).
(4) Put the aircraft back to the serviceable condition.
(5) Remove the ground support and maintenance equipment, the special and standard tools and all other items.
G. Put the aircraft back to its initial configuration.
(1) De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).
(1) De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).