- do a check and repair of the wiring between ECB (59KD) AB/J10 and STARTER MOTOR (8KA) positive terminal (Ref. ASM 49-42/01).
(a) If the fault continues:
- replace the ECB (59KD) (Ref. AMM TASK 49-61-34-000-002) and (Ref. AMM TASK 49-61-34-400-002).
(2) If the APU Last Leg Report gives the maintenance message:
CONTACTOR 5KA
Fault Code Number: 017
「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 : 106-106, 108-149, 211-299, 301-399, ∞∞49-00-00∞∞∞∞∞∞∞∞∞∞Page A264
Config-2 Aug 01/05 CES select the A/C batteries ON:
- check and repair the aircraft wiring from the ECB (59KD) AC/1 to the START CONTACTOR (5KA) B/3 for a short circuit (Ref. ASM 49-42/01).
(a) If the fault continues:
- replace the CONTACTOR-MAIN START (5KA).
1 If the fault continues:
_
- replace the ECB 59KD (Ref. AMM TASK 49-61-34-000-002) and (Ref. AMM TASK 49-61-34-400-002).
B. Do the test given in para. 3.
AIRBORNE AUXILIARY POWER - GENERAL ((GTCP 36-300)) - TASK SUPPORTING DATA
_________________________________________________________________________
R **ON A/C 001-003, 051-099, 401-499,
1. Supporting Data
_______________ APU Fault Symptom Peculiarities (Ref. Fig. 301) Whenever the operation of the APU may result in damage to the aircraft, the APU or the Electronic Control Box (ECB) of the APU, the ECB shuts down the APU automatically. The cause of the Shutdown and associated LRUs are stored in the ECB memory. This information is available on the APU system related CFDS menu page APU SHUTDOWNS.
i.e. NO FLAME (shutdown cause)
IGNITION EXCITER P12 (faulty LRU) In parallel the ECB generates a maintenance message with associated ATA Chapter and related Fault Class of the faulty LRU. This maintenance message is available on the Post Flight Report (PFR), which is, in the AIRBUS TSM philosophy, the entry point to the TSM.
i.e. ATA 494138 CLASS: 1 IGNITION EXCITER P12
During several operator conferences concerning the APU TSM it has been shown that likely most operators prefer into TSM with the information of the APU SHUTDOWNS menu, which shows the same faulty LRU as the PFR but additionally the shutdown reason.
It has been decided to follow the operators preferences to combine the PFR maintenance message with the Shutdown cause in one Fault Symptom in TSM 49:
i.e. Source Message ATA Class
ECB NO FLAME ASD *
associated with
ECB IGNITION EXCITER P12 494138 1
R **ON A/C 063-099, 401-499,
A. LRU Faults, Shutdowns and Fault Tree, Fault Code Numbers (FCN) Three classes of LRU faults exist, class 1 are the most serious and class 3 are the least serious. When certain class 1 LRU faults are detected, the ECB initiates an APU shutdown (if not inhibited) due to the impact of the failed LRU on the overall system operation. The class of the LRU faults and the text, sent to the CFDS, are shown in table 1, 2 and 3. The protective shutdowns with their associated text, shown on the APU shutdown page of the CFDS, are presented in table 4.
The fault tree (table 4, col. 3) is used to associate a protective shutdown with a failed LRU that caused the shutdown. The fault tree is used in the following manner:
「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 : 001-003, 051-099, 401-499, ∞∞49-00-00∞∞∞∞∞∞∞∞∞∞Page 301
Config-1 Aug 01/05 CES
Example of APU Fault Symptom Page
Figure 301
「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 : 001-003, 051-099, 401-499, ∞∞49-00-00∞∞∞∞∞∞∞∞∞∞Page 302
Config-1 Aug 01/05 CES
If a protective shutdown occurs, the ECB search the fault tree for this
particular shutdown. Once the shutdown is located, the ECB shall compare
any failed LRUs that where detected on the current APU run with the LRU
faults associated with the shutdown reason. If a failed LRU matches one
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