# SDR ASAA2023091645162

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 16, 2023
- Submitted: September 18, 2023
- Operation: Air carrier
- Aircraft: [N918AK](https://openairdocs.org/aircraft/N918AK), registered now
- Make and model: Boeing 737-9
- Registry model: [Boeing 737-9](https://openairdocs.org/model/boeing-737-9) (OpenAirDocs)
- Aircraft serial: 44083
- Aircraft time: 8,867 hours, 2,685 cycles
- System (JASC): [3460 · Flight Management Computing Hardware System](https://openairdocs.org/jasc/3460)
- Part: Fmc
- Part number: 1762000101
- Part serial: 013396
- Condition: Faulty
- Location: E/E Bay, E5-2
- Part time: 19,027 hours, 5,855 cycles
- Stage of operation: CR
- 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/ASAA2023091645162

## Discrepancy

AT CRUSE MOMENTARLY DUEL FMC FAILURE. LAV/VNAV DISCONNECT. SYSTEM RECOVERED AFTER 10 SECONDS. QRM PROCEDURE PERFORMED. GROUNDED - YES. FOUND MAINTENACE FAULT MGS 34-69001 "MORE THAN 1 SYSTEM HAS NO INPUT FROM FMC 1" PERFORMED IFIM 34-61-00-810-836 THE FMC FAULT IS NO LONGER ACTIVE BUT DUE TO RECENT HISTORY ON LAST 2 LEGS REMOVED L FMC COMPUTER PER AMM 34-61-02-000-801. INSTALLED L FMC COMPUTER PER AMM 34-61-02-400-801. PERF ALL SOFTWARE LOADS AND VERIFICATION PER AMM 34-61-00-470-802. ACCOMPLISHEDFMC OPERATIONAL TEST PER AMM 34-61-00-710-801 OPS TEST PASSED. SEAMC PETER ADVISED. INSTALLED/REMOVED 2 MIG-51A TAGS.

---
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.