- blockage of the APU inlet
- fire of the APU inlet
- damage/contamination of the electrical connector P6
- aircraft wiring
- APU INLET TEMPERATURE SENSOR (P6)
- ECB (59KD)
- APU (4005KM)
- APU INLET TEMPERATURE SENSOR (8010KM).
2. Job Set-up Information
______________________
A. Fixtures, Tools, Test and Support Equipment
-------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific jumper No specific multimeter
B. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION
-------------------------------------------------------------------------------
AMM 49-00-00-860-008 APU Start by External Power (131-9(A))
AMM 49-11-11-000-004 Removal of the Power Plant (APU) (131-9(A))
AMM 49-11-11-400-004 Installation of the Power Plant (APU) (131-9(A))
AMM 49-23-14-000-001 Removal of the Sensor-APU Inlet Temperature (8010KM)
(131-9(A)) AMM 49-23-14-400-001 Installation of the Sensor-APU Inlet Temperature (8010KM) (131-9(A)) AMM 49-61-34-000-003 Removal of the Electronic Control Box (ECB) (131-9(A)) AMM 49-61-34-400-003 Installation of the Electronic Control Box (ECB) (131-9(A))
「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1R EFF : 001-049, 101-105, 107-107, 151-199, ∞∞49-00-81∞∞∞∞∞∞∞∞∞∞Page A239
201-210, Config-1 Aug 01/05 CES
3. Fault Confirmation
__________________
A. Read-out of ECB Trouble-Shooting Data
(1) Put the APU MASTER SW to the ON position.
(2) Get access to the APU SHUTDOWN report.
(3) Push the '>' adjacent to LRU DATA:
- the MCDU menu shows
NO LRU FAULT DETECTED
(4) Start the APU and apply Bleed Air for 20 seconds, minimum (Ref. AMM TASK 49-00-00-860-008).
4. Fault Isolation
_______________ R **ON A/C 001-049, 101-105, 107-107, 151-154, 201-207,
A. If an APU auto shutdown occurs during the APU operation and the APU SHUTDOWN report gives the maintenance message:
INLET OVERHEAT
CHECK APU INLET
associated with Fault Code Numbers (FCN) 213
- do a check for blockage of the APU inlet.
(1) If the fault continues:
- do a check for a fire of the APU inlet:
- do a check of the inlet plenum for fire damage.
- do a check of the APU inlet duct through the inlet flap for fire damage.
(a) If there are signs of fire damage:
- replace the APU (4005KM) (Ref. AMM TASK 49-11-11-000-004) and (Ref. AMM TASK 49-11-11-400-004).
(b) If there are no signs of fire damage:
- do a check for damage/contamination of the electrical connector P6 of the APU INLET TEMPERATURE SENSOR (P6).
1 If the electrical connector P6 is damaged/contaminated:
_
- do a repair/cleaning. 2 If the electrical conector is OK:
_
- disconnect the electrical connector P6
- put a jumper across the sockets A and B of the electrical connector P6.
「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1R EFF : 001-049, 101-105, 107-107, 151-199, ∞∞49-00-81∞∞∞∞∞∞∞∞∞∞Page A240
201-210, Config-1 Aug 01/05 CES
- use a multimeter to do a resistance check of the aircraft wiring across the ECB (59KD) AB/H4 to ECB (59KD) AB/H3.
a If the resictance value is > 10 Ohms:
_
- replace the aircraft wiring.
b If the fault continues:
_
- replace th APU INLET TEMPERATURE SENSOR (P6) (Ref. AMM TASK 49-23-14-000-001) and (Ref. AMM TASK 49-23-14-400-001).
c If the fault continues:
_
- replace the ECB (59KD)of the APU (4005KM) (Ref. AMM TASK 49-61-34-000-003) and (Ref. AMM TASK 49-61-34-400-003).
**ON A/C 001-049, 101-105, 151-199, 201-210,
Post SB 49-1062 For A/C 001-049,101-105,151-154,201-207,
A. If an APU auto shutdown occurs during the APU operation and the APU SHUTDOWN report gives the maintenance message:
INLET OVERHEAT
CHECK APU INLET
associated with Fault Code Numbers (FCN) 213
- do a check for blockage of the APU inlet.
(1) If the fault continues:
- do a check for a fire of the APU inlet:
- do a check of the inlet plenum for fire damage.
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