# SDR ASAA2019022528324

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 25, 2019
- Submitted: February 26, 2019
- Operation: Air carrier
- Aircraft: [N442AS](https://openairdocs.org/aircraft/N442AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 43293
- Aircraft time: 21,022 hours, 6,917 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: IN
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2019022528324

## Discrepancy

APU HAS HISTORY OF NO BLEED. GROUNDED - YES. REMOVED APU ENGINE WIRE HARNESS AND INSTALLED A SERVICEABLE UNIT. REF B737-900 AMM 49-11-01-00-802. PULLED / RESET TWO C/B'S AS REQUIRED. USED APU BLEED SOURCE TO START ENGINES WITH NO DEFECTS. PERFORMED APU BITE AND NO CURRENT FAULTS. APU BITE REF AMM 49-61-00.

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