# SDR ASAA2022090539821

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 5, 2022
- Submitted: September 7, 2022
- Operation: Air carrier
- Aircraft: [N469AS](https://openairdocs.org/aircraft/N469AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 41702
- Aircraft time: 30,398 hours, 9,680 cycles
- System (JASC): [3460 · Flight Management Computing Hardware System](https://openairdocs.org/jasc/3460)
- Part: Fmc
- Part number: 1762000101
- Part serial: 001937
- Condition: Failed
- Location: E/E, E5
- Part time: 3,985 hours, 1,177 cycles
- Stage of operation: NR
- How discovered: V
- Nature of condition: J
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2022090539821

## Discrepancy

CA SIDE "TERRAIN FAIL" MESSAGE ON ND. INTERMITTENLY OPERATES NORMALLY, THEN FAILS AGAIN. EGPWS TEST OK. GROUNDED - YES. REMOVED AND REPLACED CAPTAINS FLIGHT MANAGEMENT COMPUTER REF B737-900 AMM 34-61-02.

---
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.