# SDR ASAA2019121643612

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 14, 2019
- Submitted: December 17, 2019
- Operation: Air carrier
- Aircraft: [N481AS](https://openairdocs.org/aircraft/N481AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 44106
- Aircraft time: 17,254 hours, 5,590 cycles
- System (JASC): [3460 · Flight Management Computing Hardware System](https://openairdocs.org/jasc/3460)
- Part: Fmc
- Condition: Malfunctioned
- Location: Left
- Stage of operation: CR
- 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/ASAA2019121643612

## Discrepancy

INTERMITTENT INDICATIONS OF LEFT FMC FAILURE APPROXIMATELY 30 MINS. CONDITIONS RESOLVED ITSELF EVENTUALLY. NORMAL INDICATIONS FOR LAST 2 HOURS OF FLT. GROUNDED - YES. ACCOMP L/H FMC BITE TEST LAST FLT LEG SHOWS PGM FAULT INTERMITTENT. CYCLED PWR TO A/C. ACCOMP FMC SENSOR TEST, ALL PASS. ACCOMP FMC FIXED OUTPUTS TEST ALL PASS TEST. REF B737-900 FIM 34-61 TASK 801 & TASK 807 & B737-900 AMM 34-61-00-710-026.

---
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.