DOC AIRBUS | AMM A320FSpecial Detailed Inspection (TC) of Forward Engine Mount Pylon Bolts [CFMI]
TASK 71-21-11-210-803-A
Special Detailed Inspection (TC) of Forward Engine Mount Pylon Bolts
Refer to the MPD TASK: 712111-05
SPECIAL DETAILED INSPECTION (TC) OF FORWARD ENGINE MOUNT PYLON BOLTS
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Consumable Materials
C. Work Zones and Access Panels
D. Referenced Information
3. Job Set-up
Subtask 71-21-11-860-057-A ** ON A/C NOT FOR ALL
Subtask 71-21-11-210-055-A ** ON A/C NOT FOR ALL
(2) Remove the nut (200), the washers (185), (195), the bolt (180) and the retainer (190) from the forward engine mount (150).
(a) Visually examine the nut (200), the washers (185) and (195), the bolt (180) and the retainer (190) for indication of damage. If there are scratches, marks and/or other damage, reject the parts.
(3) Check the TORQUE of the forward mount bolt using the 98D71203002002 CHEST TORQUE SET NM - CFM56-5 ENGINE.
(a) Check the TORQUE value of the bolt (135) is 256 lbf.ft (34.71 m.daN).
1 If using tool adaptor P/N 98D71203002206 with the angle of 22.5 degrees: set the torque wrench 240.8 lbf.ft (32.65 m.daN) to check the required TORQUE value 256 lbf.ft (34.71 m.daN).
2 If using tool adaptor P/N 98D71203002206 with the angle of 67.5 degrees: set the torque wrench 245.6 lbf.ft (33.30 m.daN) to check the required TORQUE values 256 lbf.ft (34.71 m.daN).
(4) If the bolts (135) turn and the torque value is less than the required torque value, all four bolts (135), washers (145) and nuts (140) must be discarded (Ref. AMM TASK 71-21-11-000-044) and (Ref. AMM TASK 71-21-11-400-044).
(5) Put the retainer (190) over the nut (140) and install the retainer (190) on the forward engine mount (150) with the washers (185) and (195), bolt (180) and nut (200).
(6) TORQUE the bolt (180) to between 36 and 24 lbf.in (0.41 and 0.27 m.daN )
.
(7) Installation of the lockwire.
CP8002 lockwire 0.032 in. (0.8 mm) dia CP8006 safety cable 0.032 in. (0.8 mm) dia.
5. Close-up
Subtask 71-21-11-410-072-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.01 02:22:48 UTC
Special Detailed Inspection (TC) of Forward Engine Mount Pylon Bolts
WARNING:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
ZONE: 400
1. Reason for the JobRefer to the MPD TASK: 712111-05
SPECIAL DETAILED INSPECTION (TC) OF FORWARD ENGINE MOUNT PYLON BOLTS
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | AR | ACCESS PLATFORM 1M(3 FT) |
| No specific | AR | WARNING NOTICE(S) |
| No specific | Torque wrench: range to between 36 and 24 lbf.in (0.41 and 0.27 m.daN ) | |
| 98D27803500001 | 1 | LOCKING TOOL ZERO POS |
| 98D71203002002 | 1 | CHEST TORQUE SET NM - CFM56-5 ENGINE |
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.CP8002) | lockwire 0.032 in. (0.8 mm) dia |
| (Material No.CP8006) | safety cable 0.032 in. (0.8 mm) dia. |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 400 | POWER PLANT, NACELLES AND PYLONS |
| FOR [1000EM1] (ENGINE-1) | |
| 437AL, 438AR, 451AL, 452AR | |
| FOR [1000EM2] (ENGINE-2) | |
| 447AL, 448AR, 461AL, 462AR | |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 71-13-00-010-040-A | Opening of the Fan Cowl Doors |
| TASK 71-13-00-410-040-A | Closing of the Fan Cowl Doors |
| TASK 71-21-11-000-044-A | Removal of the Forward Engine Mount Bolts One at a Time |
| TASK 71-21-11-400-044-A | Installation of the Forward Engine Mount Bolts One at a Time |
| TASK 78-30-00-081-041-A | Make the Thrust Reverser Serviceable after Maintenance |
| TASK 78-30-00-481-041-A | Make the Thrust Reverser Unserviceable for Maintenance |
| TASK 78-36-00-010-040-A | Opening of the Thrust Reverser Doors |
| TASK 78-36-00-410-040-A | Closing of the Thrust Reverser Doors |
Forward Engine Mount BoltsSubtask 71-21-11-860-057-A ** ON A/C NOT FOR ALL
A. Aircraft Maintenance Configuration
(1) On the center pedestal, on the ENG panel 115VU, make sure that a WARNING NOTICE(S) is in position to tell persons not to start the engine.
(2) Make sure that the engine 1(2) shutdown occurred not less than five minutes before you do this procedure.
(3) On the overhead maintenance panel 50VU, make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off. Make sure that a WARNING NOTICE(S) is in position to tell persons not to energize the FADEC 1(2).
(4) Make sure that the ACCESS PLATFORM 1M(3 FT) is in position.
(5) Make sure that the slats are retracted and install the 98D27803500001 LOCKING TOOL ZERO POS on the flap and slat control lever.
Subtask 71-21-11-010-080-A ** ON A/C NOT FOR ALL (1) On the center pedestal, on the ENG panel 115VU, make sure that a WARNING NOTICE(S) is in position to tell persons not to start the engine.
(2) Make sure that the engine 1(2) shutdown occurred not less than five minutes before you do this procedure.
(3) On the overhead maintenance panel 50VU, make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off. Make sure that a WARNING NOTICE(S) is in position to tell persons not to energize the FADEC 1(2).
(4) Make sure that the ACCESS PLATFORM 1M(3 FT) is in position.
(5) Make sure that the slats are retracted and install the 98D27803500001 LOCKING TOOL ZERO POS on the flap and slat control lever.
B. Get Access
(1) Make sure that the fan cowl doors are open (Ref. AMM TASK 71-13-00-010-040):
(2) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(3) FOR [1000EM2] (ENGINE-2)
447AL 448AR
Subtask 71-21-11-040-062-A ** ON A/C NOT FOR ALL Subtask 71-21-11-010-107-A ** ON A/C NOT FOR ALL (1) Make sure that the fan cowl doors are open (Ref. AMM TASK 71-13-00-010-040):
(2) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(3) FOR [1000EM2] (ENGINE-2)
447AL 448AR
D. Make sure that the thrust reverser doors are open (Ref. AMM TASK 78-36-00-010-040)
(1) FOR [1000EM1] (ENGINE-1)
451AL, 452AR
(2) FOR [1000EM2] (ENGINE-2)
461AL, 462AR
4. Procedure(1) FOR [1000EM1] (ENGINE-1)
451AL, 452AR
(2) FOR [1000EM2] (ENGINE-2)
461AL, 462AR
Subtask 71-21-11-210-055-A ** ON A/C NOT FOR ALL
CAUTION:
ONLY CHECK ONE BOLT A TIME.
A. Do a TORQUE Check of the Forward Engine Mount Pylon Bolts NOTE: Do not loosen the bolts before checking the torque.
NOTE: Perform the torque check one bolt at a time.
(1) Removal of the lockwire. WARNING:
USE GOGGLES AND GLOVES WHEN YOU REMOVE OR INSTALL LOCKWIRE. EACH TIME YOU CUT LOCKWIRE, REMOVE AND DISCARD IT IMMEDIATELY. LOOSE LOCKWIRE CAN CUT YOU OR MAKE YOU BLIND, AND/OR CAN CAUSE DAMAGE.
(a) Cut and remove the lockwire or safety cable from the bolt (135). (2) Remove the nut (200), the washers (185), (195), the bolt (180) and the retainer (190) from the forward engine mount (150).
(a) Visually examine the nut (200), the washers (185) and (195), the bolt (180) and the retainer (190) for indication of damage. If there are scratches, marks and/or other damage, reject the parts.
(3) Check the TORQUE of the forward mount bolt using the 98D71203002002 CHEST TORQUE SET NM - CFM56-5 ENGINE.
(a) Check the TORQUE value of the bolt (135) is 256 lbf.ft (34.71 m.daN).
1 If using tool adaptor P/N 98D71203002206 with the angle of 22.5 degrees: set the torque wrench 240.8 lbf.ft (32.65 m.daN) to check the required TORQUE value 256 lbf.ft (34.71 m.daN).
2 If using tool adaptor P/N 98D71203002206 with the angle of 67.5 degrees: set the torque wrench 245.6 lbf.ft (33.30 m.daN) to check the required TORQUE values 256 lbf.ft (34.71 m.daN).
(4) If the bolts (135) turn and the torque value is less than the required torque value, all four bolts (135), washers (145) and nuts (140) must be discarded (Ref. AMM TASK 71-21-11-000-044) and (Ref. AMM TASK 71-21-11-400-044).
(5) Put the retainer (190) over the nut (140) and install the retainer (190) on the forward engine mount (150) with the washers (185) and (195), bolt (180) and nut (200).
(6) TORQUE the bolt (180) to between 36 and 24 lbf.in (0.41 and 0.27 m.daN )
. (7) Installation of the lockwire.
WARNING:
USE GOGGLES AND GLOVES WHEN YOU REMOVE OR INSTALL LOCKWIRE. EACH TIME YOU CUT LOCKWIRE, REMOVE AND DISCARD IT IMMEDIATELY. LOOSE LOCKWIRE CAN CUT YOU OR MAKE YOU BLIND, AND/OR CAN CAUSE DAMAGE.
(a) Safety the bolt (135) with Subtask 71-21-11-410-072-A ** ON A/C NOT FOR ALL
A. Close the thrust reverser cowl doors (Ref. AMM TASK 78-36-00-410-040):
(1) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(2) FOR [1000EM2] (ENGINE-2)
461AL 462AR
Subtask 71-21-11-440-057-A ** ON A/C NOT FOR ALL Subtask 71-21-11-410-073-A ** ON A/C NOT FOR ALL (1) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(2) FOR [1000EM2] (ENGINE-2)
461AL 462AR
C. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-040):
(3) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(4) FOR [1000EM2] (ENGINE-2)
447AL 448AR
(5) Remove the WARNING NOTICE(S).
(6) On the panel 114VU remove the locking tool from the flap and slat control lever.
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-040):
(3) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(4) FOR [1000EM2] (ENGINE-2)
447AL 448AR
(5) Remove the WARNING NOTICE(S).
(6) On the panel 114VU remove the locking tool from the flap and slat control lever.