# SDR 371PA0034

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 23, 2004
- Submitted: February 4, 2004
- Operation: Air carrier
- Aircraft: [N371PA](https://openairdocs.org/aircraft/N371PA), registered now
- Make and model: Boeing 737306
- Aircraft serial: 23543
- Aircraft time: 34,477 hours, 26,104 cycles
- System (JASC): [2210 · Autopilot System](https://openairdocs.org/jasc/2210)
- Part: Computer
- Part number: 4051600913
- Condition: Malfunctioned
- Location: Flt Control
- Stage of operation: CR
- How discovered: O
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/371PA0034

## Discrepancy

AUTOPILOT DRIFTED OFF ALTITUDE IN CRUISE +320 FT, THEN RECAPTURED ASSIGNED ALTITUDE.  PLACED AUTOPILOT ALTITUDE HOLD ON MEL 22-1. REPLACED "A" FLIGHT CONTROL COMPUTER PER MM 34-60.  PERFORMED FCC TEST AND LAND VERIFY. TEST NORMAL.

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