# SDR ASAA2018121207485

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 10, 2018
- Submitted: December 20, 2018
- Operation: Air carrier
- Aircraft: [N464AS](https://openairdocs.org/aircraft/N464AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 40714
- Aircraft time: 18,510 hours, 6,026 cycles
- System (JASC): [4997 · APU System Wiring](https://openairdocs.org/jasc/4997)
- Part: Wire Harness
- Part number: 38884492
- Condition: Unknown
- Location: Apu
- Stage of operation: TX
- How discovered: O
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2018121207485

## Discrepancy

FLT ATTENDANT REPORTS LOUD BANGING IN AFT GALLEY DOOR DURING S.E. TAXI WITH APU RUNNING. GROUNDED - YES. VERIFIED LOUD BANGING SOUND COMING FROM APU WHEN HIGHER BLEED AIR IS REQUIRED (HIGHER THAN 20 PSI). NO DEFECTS IN TAIL PIPE. REPLACED APU ENGINE WIRE HARNESS REF B737-900 AMM 49-11-01. OPS TEST GOOD. LEAK CHECK GOOD.

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