# SDR ASAA2015061512101

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 15, 2015
- Submitted: June 19, 2015
- Operation: Air carrier
- Aircraft: [N532AS](https://openairdocs.org/aircraft/N532AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 36346
- Aircraft time: 19,671 hours, 5,920 cycles
- System (JASC): [4940 · APU Start/Ignition System](https://openairdocs.org/jasc/4940)
- Part: Exciter
- Part number: 38880585
- Part serial: J13480331
- Condition: Failed
- Location: Apu
- Part time: 1,155 hours, 2,387 cycles
- Stage of operation: TX
- How discovered: O
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2015061512101

## Discrepancy

ON TAXI IN, APU WOULD NOT START AND "FAULT" LIGHT ILLUMINATED.  ACFT GROUNDED. ACCOMPLISHED APU BITE PROCEDURE IAW 49-60, TASK 801. FOUND MAINTENANCE MESSAGE 49-41011, "NO FLAME SHUTDOWN".  ACCOMPLISHED FAULT, ISOLATION TASK 49-40, 802.  FAULT 49-41011 WAS DISPLAY AGAIN IN MAINTENANCE MESSAGE.  ACCOMPLISHED TEST APU IAW FIM TASK 49-40,  TASK 802, STEP 1-G6, ITEM F.  REPLACED IGNITER LEAD REF AMM 49-41-52-400-801/ 000-801 AND IGNITER PLUG REF AMM 49-41-51-000-801/ 400-801.  OPS CHECK- NO HELP.  WHILE T/S FOUND APU LUBE MODULE OIL FILTER INDICATOR POPPED.  REPLACED LUBE FILTER ELEMENT REF AMM 49-91-12-000-802/ 400-802 AND FOUND BUTTON ON THE OIL FILTER WON'T RESET.  REPLACED IGNITION UNIT IAW AMM 49-41-31-400-801, OPS CHECKS GOOD, APU STARTS AND OPERATES NORMALLY. REPLACED OIL FILTER INDICATOR.  REF AMM 49-91-13-400-802.  OPS CHECKS GOOD.

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