# SDR ASAA2017110922527

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 9, 2017
- Submitted: November 13, 2017
- Operation: Air carrier
- Aircraft: [N487AS](https://openairdocs.org/aircraft/N487AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 44108
- Aircraft time: 8,221 hours, 2,676 cycles
- System (JASC): [4970 · APU Indicating System](https://openairdocs.org/jasc/4970)
- Part: Warning System
- Condition: False Activation
- Location: Cockpit
- Stage of operation: NR
- 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/ASAA2017110922527

## Discrepancy

UPON APU START UP RECEIVED A BLUE MAINT LIGHT. GROUNDED - YES. VERIFY BLUE MAINT LIGHT WAS ON, SHUT DOWN APU AND THEN I STARTED APU AGAIN AND RAN IT FOR 5 MIN AND BLUE MAINT LIGHT WENT OFF. PERFORMED BITE CHECK AND OIL LEVEL WAS FULL. GROUND VERIFICATION CHECK GOOD REF FIM 49-90 TASK 804. NO FAULT LIGHT ON A/C OK FOR SERVICE.

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