# SDR ASAA2018100526371

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 4, 2018
- Submitted: October 5, 2018
- Operation: Air carrier
- Aircraft: [N481AS](https://openairdocs.org/aircraft/N481AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 44106
- Aircraft time: 12,719 hours, 4,284 cycles
- System (JASC): [4970 · APU Indicating System](https://openairdocs.org/jasc/4970)
- Part: Warning System
- Condition: False Activation
- Location: Cockpit
- Stage of operation: TX
- How discovered: O
- Nature of condition: N
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2018100526371

## Discrepancy

POWER TRANSFER TO AC APU SHUT DOWN, " APU FAULT". GROUNDED - YES. PERFORMED APU BITE; NO CURRENT FAULTS. PERFORMED APU START AND SHUTDOWN; NO FAULTS. INITIAL EVALUATION PERFORMED. REF. FIM 49-90 TASK 809, FIM 44-60 TASK 802, AND FIM 49-10 TASK 801.

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