# SDR ASAA2016090117911

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 1, 2016
- Submitted: September 6, 2016
- Operation: Air carrier
- Aircraft: [N487AS](https://openairdocs.org/aircraft/N487AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 44108
- Aircraft time: 3,478 hours, 1,129 cycles
- System (JASC): [4900 · Airborne Auxiliary Power Unit (APU) System](https://openairdocs.org/jasc/4900)
- Part: Warning Light
- Condition: False Activation
- Location: Apu
- Stage of operation: NR
- How discovered: O
- Nature of condition: N
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2016090117911

## Discrepancy

BLUE APU MAINTENANCE LIGHT ILLUMINATED.  ACFT GROUNDED.  INTERROGATED CDU. NO RECENT FAULTS OR HISTORY. CHECKED APU OIL QTY LEVEL. OIL LEVEL AT FULL. ACCOMPLISHED RESTART APU. NO MAINT LIGHT OR FURTHER FAULTS NOTED. APU START SUCCESSFUL IAW AMM 49-90-00-007.

---
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.