DOC AIRBUS | TSM A320FOil Overtemperature on Engine 1
1. Possible Causes
· ACOC ( 6002EM )
· FCOC ( 6003EM )
· EEC ( 4000KS )
· SENSOR-LOW LEVEL, LEFT WING TK INNER CHANNEL A ( 38QJ1 )
· SENSOR-TEMP, LEFT WING TK INNER CHANNEL A ( 29QJ1 )
· SENSOR-TEMP, LEFT WING TK OUTER CHANNEL A ( 30QJ1 )
· SENSOR-HIGH LVL, LEFT WING SURGE TK CHANNEL A ( 28QJ1 )
· FLSCU-1 ( 7QJ )
· Left Temperature Sensor Dummy (41QJ)
2 Job Set-up Information
A. Referenced Information
REFERENCE DESIGNATION
28-46-00-810-812-A L(R) Surge Tank Overflow Sensor 28QJ1(2)
28-46-00-810-813-A L(R) Inner Temperature Sensor 29QJ1(2)
28-46-00-810-814-A L(R) Outer Temperature Sensor 30QJ1(2)
28-46-00-810-815-A L(R) IDG Shut Off Sensor 38QJ1(2)
28-46-00-810-818-A FLSCU1(2) 7QJ(9QJ)
Ref. AMM 28-42-00-740-003 Interrogation of the FQIS Input Parameters Pages
Ref. AMM 28-42-00-740-007 Interrogation of the (SMITHS INDUSTRIES) FQIS Trouble Shooting
Data
Ref. AMM 28-46-00-740-001 Functional (BITE) Test
Ref. AMM 28-46-16-000-001 Removal of the Overflow Sensor
Ref. AMM 28-46-16-400-001 Installation of the Overflow Sensor
Ref. AMM 28-46-17-000-001 Removal of the Temperature Sensor
REFERENCE DESIGNATION
Ref. AMM 28-46-17-000-002 Removal of the Temperature Sensor
Ref. AMM 28-46-17-400-001 Installation of the Temperature Sensor
Ref. AMM 28-46-17-400-002 Installation of the Temperature Sensor
Ref. AMM 28-46-19-000-001 Removal of the IDG Shut-off Sensor.
Ref. AMM 28-46-19-400-001 Installation of the IDG Shut-off Sensor.
Ref. AMM 28-46-34-000-001 Removal of the Fuel-Level Sensing Control-Unit (FLSCU)
Ref. AMM 28-46-34-400-001 Installation of the Fuel-Level Sensing Control-Unit (FLSCU)
Ref. AMM 71-13-00-410-010 Closing of the Fan Cowls 437AL(447AL),438AR(448AR)
Ref. AMM 73-22-34-000-010 Removal of the Electronic Engine Control (EEC)
Ref. AMM 73-22-34-400-010 Installation of the Electronic Engine Control (EEC)
Ref. AMM 79-21-42-000-010 Removal of the Air Cooled Oil Cooler
Ref. AMM 79-21-42-400-010 Installation of the Air Cooled Oil Cooler
Ref. AMM 79-21-43-000-010 Removal of the Fuel Cooled Oil Cooler
Ref. AMM 79-21-43-400-010 Installation of the Fuel Cooled Oil Cooler
3. Fault Confirmation
Subtask 79-00-00-710-050-A
A. Test
Not applicable, you cannot always confirm this fault on the ground.
4. Fault Isolation
Subtask 79-00-00-810-050-A
A. If the fault symptom is identified by the CFDS message HMS-ENG OIL OVTMP1 and the ECAM warning
ENG1 FADEC:
· replace the ACOC ( 6002EM ) Ref. AMM 79-21-42-000-010 and Ref. AMM 79-21-42-400-010 .
(1) If the fault continues:
· examine the ACOC air ducts for blockage.
(2) If the fault continues:
· replace the FCOC ( 6003EM ) Ref. AMM 79-21-43-000-010 and Ref. AMM 79-21-43-400-010 .
(3) If the fault continues:
· replace the EEC ( 4000KS ) Ref. AMM 73-22-34-000-010 and Ref. AMM 73-22-34-400-010 .
Subtask 79-00-00-810-105-A
B. If NO FAILURE messages are present:
(1) Confirm that the associated wing tank Temperature and Level sensors are indicating the correct state.
(a) Check on the FUEL PAGE of the lower Display Unit (DU) the inner and outer tank temperatures.
· Record the tank temperatures and confirm that the inner tank is indicating less than 53.5 deg.C
(128.30 deg.F) and the outer tank is indicating less than 56 deg.C (132.80 deg.F).
(b) Transfer fuel or refuel such that inner tanks contain 1000 kg (2204.62 lb).
NOTE: This is to ensure that the inner wing tanks temperature and low Level (IDG shut off)
sensors are wet.
(c) Access the FQIS input parameter pages (refer to Para. 4.A(1) of Ref. AMM 28-42-00-740-003
and access the FQIS discrete inputs.
· Confirm that the temperature sensor positions indicate state "0"= LOW and that the IDG SHUT
OFF SENSOR and OVER FLOW SENSORS indicate state "1" in accordance with the Para.
4.C. Discrete Input Parameters Ref. AMM 28-42-00-740-003 .
1 M1 - SENSOR-LOW LEVEL, LEFT WING TK INNER CHANNEL A ( 38QJ1 ) : 1 = Wet; 0 =
Not wet - Should be state 1.
2 N6 - T1 SENSOR-TEMP, LEFT WING TK INNER CHANNEL A ( 29QJ1 ) : 1 = High; 0 =
Low - Should be state 0.
3 E5 - T2 SENSOR-TEMP, LEFT WING TK OUTER CHANNEL A ( 30QJ1 ) : 1 = High; 0 =
Low - Should be state 0.
4 N8 - SENSOR-HIGH LVL, LEFT WING SURGE TK CHANNEL A ( 28QJ1 ) : 1 = Dry; 0 =
Not dry - Should be state 1.
(d) Check the status of the IDG recirculation logic as follows:
1 N2 - FLSCU-1 Sensor Failure - Should be 0 (no fault).
2 N7 - LOGIC-1 (IDG) ( FLSCU-1 ( 7QJ ) ) - 1 = Open; 0 = Not open (Should be 1 during
engine ground run (Open)).
(2) If any sensor indicates the incorrect state:
(a) Perform the FLSCU commanded BITE test Ref. AMM 28-46-00-740-001 .
1 If a CFDS message, relative to one of the fuel or temperature level sensors, refer to
associated TSM task:
a If Overflow Sensor 28QJ1 is reported as failed, perform (Ref. TSM 28-46-00-810-812) .
If necessary, replace the surge level sensor Ref. AMM 28-46-16-000-001 and Ref.
AMM 28-46-16-400-001 .
b If Temperature Sensor 29QJ1 is reported as failed, perform
(Ref. TSM 28-46-00-810-813) . If necessary, replace the temperature sensor Ref.
AMM 28-46-17-000-001 and Ref. AMM 28-46-17-400-001 .
c If Temperature Sensor 30QJ1 is reported as failed, perform
(Ref. TSM 28-46-00-810-814) . If necessary, replace temperature sensor Ref.
AMM 28-46-17-000-002 and Ref. AMM 28-46-17-400-002 .
d If IDG shut off sensor 38QJ1 is reported as failed, perform
(Ref. TSM 28-46-00-810-815) . If necessary, replace the IDG shut off sensor Ref.
AMM 28-46-19-000-001 and Ref. AMM 28-46-19-400-001 .
2 If a CFDS message, relative to the fuel or temperature sensors, is not displayed, perform
trouble shooting in accordance with (Ref. TSM 28-46-00-810-818) .
3 If a CFDS message associated with the FLSCU is identified, interrogate the FLSCU Trouble
Shooting Data Ref. AMM 28-42-00-740-007 .
(3) If the level sensors show the correct state but the LOGIC-1 is indicating state 0 (Not Open)
during engine ground run, replace the FLSCU-1 7QJ Ref. AMM 28-46-34-000-001 and Ref.
AMM 28-46-34-400-001 .
(4) If the level sensors show the correct state, and the LOGIC-1 (IDG Recirculation) is indicating the
correct state, do the inspection of the magnetic chip detectors.
Subtask 79-00-00-810-105-B
B. If NO FAILURE messages are present or if CFDS message associated with FLSCU is identified:
(1) Confirm that the associated wing tank Temperature and Level sensors are indicating the correct state.
(a) Check on the FUEL PAGE of the lower Display Unit (DU) the tank temperatures.
· Record the tank temperatures and confirm that the tank is indicating less than 53.5 deg.C
(128.30 deg.F).
(b) Transfer fuel or refuel such that wing tanks contain 1000 kg (2204.62 lb).
NOTE: This is to ensure that the wing tank temperature and low Level (IDG shut Off) sensors are
wet.
(c) Access the FQIS input parameter pages (refer to Para. 4.A(1) of Ref. AMM 28-42-00-740-003
and access the FQIS discrete inputs.
· Confirm that the temperature sensor positions indicate state "0"= LOW and that the IDG SHUT
OFF SENSOR and OVER FLOW SENSORS indicate state "1"= WET in accordance with the
Para. 4.C. Discrete Input Parameters Ref. AMM 28-42-00-740-003 .
1 J3 - SENSOR-LOW LEVEL, LEFT WING TK INNER CHANNEL A ( 38QJ1 ) : 1 = Wet; 0 =
Not wet - Should be state 1.
2 D5 - T1 SENSOR-TEMP, LEFT WING TK INNER CHANNEL A ( 29QJ1 ) : 1 = High; 0 =
Low - Should be state 0.
3 E5 - T2 Left Temperature Sensor Dummy (41QJ) : 1 = High; 0 = Low - Should be state 0.
4 D3 - SENSOR-HIGH LVL, LEFT WING SURGE TK CHANNEL A ( 28QJ1 ) : 1 = Dry; 0 =
Wet - Should be state 1.
(2) If any sensor indicates the incorrect state perform the following trouble shooting:
(a) Perform the FLSCU commanded BITE test Ref. AMM 28-46-00-740-001 .
1 If a CFDS message, relative to the fuel or temperature sensors, is displayed:
· Do the applicable trouble shooting procedure:
a If Overflow Sensor 28QJ1 is reported as failed, perform (Ref. TSM 28-46-00-810-812) .
If necessary, replace the surge level sensor Ref. AMM 28-46-16-000-001 and Ref.
AMM 28-46-16-400-001 .
b If Temperature Sensor 29QJ1 is reported as failed, perform
(Ref. TSM 28-46-00-810-813) . If necessary, replace the temperature sensor Ref.
AMM 28-46-17-000-001 and Ref. AMM 28-46-17-400-001 .
c If IDG Shut Off Sensor 38QJ1 is reported as failed, perform
(Ref. TSM 28-46-00-810-815) . If necessary, replace the IDG Shut Off Sensor Ref.
AMM 28-46-19-000-001 and Ref. AMM 28-46-19-400-001 .
2 If a CFDS message, relative to the fuel or temperature sensors, is not displayed, refer to
(Ref. TSM 28-46-00-810-818) .
3 If a CFDS message, relative to the IDG control circuit, is displayed:
· Do the applicable trouble shooting procedure.
NOTE: If the Temperature sensor Dummy shows the incorrect state, confirm aircraft effectivity
in A320-28-1100, if aircraft is effective in the service bulletin, check that SB
A320-28-1100 has been completed on the aircraft.
(3) If NO FAULTS identified with the level and temperature sensors, check the FLSCU-1 LOGIC-1 (Left
wing IDG control) and FLSCU-1 sensor failures.
(a) Confirm the following is displayed: A5-FLSCU-1 LOG 1 Right IDG cooling State; 1 = Open; 0 =
Shut - State should be 1 during engine ground run.
· If LOGIC-1 state is indicating state 0 (Shut), then this could indicate a fault with the FLSCU.
Replace the FLSCU-1 7QJ Ref. AMM 28-46-34-000-001 and Ref. AMM 28-46-34-400-001 .
(b) Confirm the following is displayed: C5 - FLSCU-1 Sensor failure monitor; 1 = FAIL; 0 = OK -
State should be 0.
· If state is indicating 1 (FAIL), then perform trouble shooting in accordance with
(Ref. TSM 28-46-00-810-818) .
If logic statuses are incorrect, replace the applicable FLSCU, Ref.
AMM 28-46-34-000-001 and Ref. AMM 28-46-34-400-001 .
(4) Do the inspection of the magnetic chip detectors.
Subtask 79-00-00-710-051-A
C. After the subsequent flight, make sure that the fault does not continue.
5. Close-up
Subtask 79-00-00-860-050-A
A. Make sure that the fan cowls 437AL and 438AR are closed Ref. AMM 71-13-00-410-010 . [Rev.6 from Feb 2017] 2026.04.04 04:38:25 UTC