# SDR AALA970532

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 12, 1997
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: [N1424M](https://openairdocs.org/aircraft/N1424M), registered now
- Make and model: Fokker F.28 MK 0100
- Registry model: [Fokker F.28 MK 0100](https://openairdocs.org/model/fokker-f-28-mk-0100) (OpenAirDocs)
- Aircraft serial: 11407
- System (JASC): [2211 · Autopilot Computer](https://openairdocs.org/jasc/2211)
- Part: Computer
- Condition: Malfunctioned
- Location: Autopilot
- Stage of operation: AP
- Nature of condition: F
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA970532

## Discrepancy

IAD - FLT 1823 - DURING APPROACH TO DCA WHEN NR 1 AUTOPILOT WAS DISCONNECTED, A/C FELT NOSE HEAVY AND STAB TRIM NOTED AT FULL NOSE DOWN.  STAB TRIM THEN RAN TO FULL NOSE UP FOLLOWED BY NR 1 AND NR 2 STAB TRIM FAULTING.  A/C DIVERTED TO IAD, LANDED W/O INCIDENT.  FAULT TEST REVEALED NO FAULTS.  PREVIOUS FAULT REVIEW REVEALED AP DISC/INH FMP, TRIM 1 FAIL TRIM SERVO/FAC 1, AP DISC/INH TRIM SERVO/FAC2.  AFCS TESTS REVEALED NO SYSTEM FAULTS.  PRECAUTIONARY REPLACED FLT AUGMENTATION COMPUTER.  SYS GROUND CHECKED NORM OPS.  ACCOMP FUNCTIONAL CHECK/MX FERRY FLT IAD/ORD WITH NO DEFECTS FOUND.  SYS OPS CHECKED NORM AND A/C RETURNED TO SERV.  (M)

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