# SDR ASAA2020060832782

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 5, 2020
- Submitted: June 8, 2020
- Operation: Air carrier
- Aircraft: [N487AS](https://openairdocs.org/aircraft/N487AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 44108
- Aircraft time: 18,111 hours, 5,667 cycles
- System (JASC): [4930 · APU Engine Fuel and Control](https://openairdocs.org/jasc/4930)
- Part: Fcu
- Part number: 4419215
- Part serial: CUC21162
- Condition: Malfunctioned
- Location: Apu
- Part time: 5,761 hours, 10,256 cycles
- Stage of operation: CR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2020060832782

## Discrepancy

FAULT LIGHT ILLUMINATED DURING APU START ATTEMPT FL 390 SUCCESSFUL CSS ACCOMPLISHED AFTER FAULT LIGHT EXTINGUISHED. GROUNDED - YES. REMOVED AND REPLACED APU FUEL CONTROL UNIT REF AMM 49-91-11 AND APU LUBE MODULE REF AMM 49-31-11. LEAK AND OPS CHECKS GOOD. NO FAULTS NOTED.

---
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.