# SDR ASAA2014080608770

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 6, 2014
- Submitted: August 7, 2014
- Operation: Air carrier
- Aircraft: [N559AS](https://openairdocs.org/aircraft/N559AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35178
- Aircraft time: 29,321 hours, 8,765 cycles
- System (JASC): [4997 · APU System Wiring](https://openairdocs.org/jasc/4997)
- Part: Wire Harness
- Part number: 38884492
- Condition: Failed
- Location: Apu
- Stage of operation: NR
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2014080608770

## Discrepancy

WHILE OPERATING PACKS, APU PRESSURE HAD BEEN NORMAL THEN DROPPED TO 15 PSI WITH NO SWITCH MANIPULATION.  ACFT GROUNDED.   REPLACED APU WIRE HARNESS AND OPS NORMAL IAW AMM 49-11-01.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.