# SDR ASAA2017041320462

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 13, 2017
- Submitted: April 17, 2017
- Operation: Air carrier
- Aircraft: [N468AS](https://openairdocs.org/aircraft/N468AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 41735
- Aircraft time: 11,122 hours, 3,740 cycles
- System (JASC): [3460 · Flight Management Computing Hardware System](https://openairdocs.org/jasc/3460)
- Part: Fmc
- Condition: Malfunctioned
- Stage of operation: NR
- 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/ASAA2017041320462

## Discrepancy

NR 2 FMC ON MEL, FMC SELECTOR ON "BOTH ON LEFT" POSITION, INTERMITTENT VTK DISPLAYED ON BOTH ND DISPLAYS & MAP FLAGS. ACFT GROUNDED. FMCS BITE NO SENSOR FAULTS. 13 INFLIGHT FAULTS LOGGED ON LEGS 2 AND 9. FAULTS ON BOTH LEGS IDENTICAL.  VERIFIED BOTH FMC SOFTWARE PROVISIONS ARE SAME AND EFFECTIVE.  ACCOMPLISHED PROGRAM PINS TEST IAW AMM 34-61-00-730-801 STEP (7).  ALL NORMAL IAW TABLES 506 AND 507.  RELOADED FMC SOFTWARE IAW AMM 34-61-00-470-805. CROSS-LOADED NORMAL.  FMC SOFTWARE CONFIGURATION CHECKED NORMAL IAW AMM 34-61-00-750-801. TESTS LOADED VERIFIED OPS, NDB, OPC, MEDB, ADDB, AND LDDB.

---
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.