- main power supply to the ECB (59KD)
- APU MAIN RELAY (4KD)
- APU/MASTER SW PBS/W (14KD)
- aircraft wiring
- ECB (59KD)
2. Job Set-up Information
______________________
A. Referenced Information
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REFERENCE DESIGNATION
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24-00-00-810-802 Power Supply Interruption
AMM 24-41-00-861-002 Energize the Aircraft Electrical Circuits from the
External Power
AMM 49-00-00-710-010 Operational Test of the APU (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)) ASM 49-61/01
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
POWER SUPPLY INTERRUPT
(4) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002)
(5) Make sure that the 28VDC power supply of the APU BAT BUS (301PP) is correct at (Ref. ASM 49-61/01):
- the pin 2 on the circuit breaker ECB SUPPLY (1KD),
- the pin 2 on circuit breaker APU CTL (2KD).
「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 A260
201-210, Config-1 Aug 01/05 CES
(a) If the power supply is not correct:
- do the trouble-shooting for the DC GENERATION (Ref. TASK 24-00-00-810-802).
(b) If the power supply is correct:
- do the operational test of the APU (Ref. AMM TASK 49-00-00-710-010).
4. Fault Isolation
_______________
A. If an APU auto shutdown occurs during the APU operation and the APU
SHUTDOWN report gives the maintenance message:
LOSS OF DC POWER
POWER SUPPLY INTERRUPT
associated with Fault Code Numbers (FCN) 218
- do a check of the main power supply to the ECB (59KD) (Ref. ASM 49-61/01):
- do a check for 28VDC at the ECB (59KD) AC/7.
NOTE : The APU MASTER SW PBS/W (14KD) on the panel 25VU must be in the ON
____
position during the check.
(1) If the power supply to the ECB (59KD) is not correct:
- do a check and replace (Ref. ASM 49-61/01):
- the APU MAIN RELAY (4KD),
- the APU/MASTER SW PBS/W (14KD).
(a) If the fault continues:
- do a check and repair the aircraft wiring from the ECB (59KD) AC/3 to the ground, and the ECB (59KD) AC/7 to the circuit breaker MAIN SUPPLY (1KD) via the APU MAIN RELAY (4KD), and the ECB (59KD) AB/F9 to the circuit breaker APU CTL (2KD) via the APU MAIN RELAY (4KD), and the ECB (59KD) AB/F9 to the ground via the APU/MASTER SW PBS/W (14KD) A/A1. (Ref. ASM 49-61/01).
(2) If the power supply to the ECB (59KD) is correct:
- replace the ECB (59KD) (Ref. AMM TASK 49-61-34-000-003) and (Ref. AMM TASK 49-61-34-400-003).
「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 A261
201-210, Config-1 Aug 01/05 CES
TASK 49-00-81-810-851
Inlet-Guide Vane-Actuator (P21) Fault (131-9(A))
1. Possible Causes
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- IGV TORQUE MOTOR SHOWS OPEN CIRCUIT
- IGV TORQUE MOTOR SHOWS SHORT CIRCUIT
- damage/contamination of electrical connector P21
- IGV ACTUATOR (P21)
- aircraft wiring
- ECB (59KD)
- IGV ACTUATOR (8014KM)
2. Job Set-up Information
______________________
A. Fixtures, Tools, Test and Support Equipment
-------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific multimeter
B. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
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