# SDR AALA20141223011

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 23, 2014
- Submitted: December 24, 2014
- Operation: Air carrier
- Aircraft: N9621A
- Make and model: Doug DC-9-83
- Registry model: [Doug DC-9-83](https://openairdocs.org/model/douglas-dc-9-83) (OpenAirDocs)
- Aircraft serial: 53592
- Aircraft time: 46,938 hours, 22,365 cycles
- System (JASC): [3460 · Flight Management Computing Hardware System](https://openairdocs.org/jasc/3460)
- Part: Fmc
- Part number: 4052504927
- Part serial: 88041387
- Condition: Inoperative
- Location: Zone 100
- Stage of operation: CR
- How discovered: O
- Nature of condition: G
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA20141223011

## Discrepancy

AIR INTERRUPT, RETURNED FOR LOST HEADING & NAVIGATION DATA.  EMER NOT DECLARED, LANDED UNEVENTFULLY & WAS NOT OVERWEIGHT.  REPLACED FMC & ACCOMPLISHED OVERWEIGHT LANDING INSPECTION.  PERFORMED REQUIRED TEST IAW AMM 34-63-03.  ACCOMPLISHED MCDU OPERATIONS TEST IAW AMM 34-63-04.  ALL TEST PASSED.

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