# SDR PIDA20050201

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 23, 2005
- Submitted: December 28, 2005
- Operation: Air carrier
- Aircraft: N380WL
- Make and model: Boeing 737-3G7
- Registry model: [Boeing 737-3G7](https://openairdocs.org/model/boeing-737-3g7) (OpenAirDocs)
- Aircraft serial: 23218
- Aircraft time: 57,361 hours, 44,360 cycles
- System (JASC): [2210 · Autopilot System](https://openairdocs.org/jasc/2210)
- Part: Autopilot Sys
- Condition: Malfunctioned
- Location: B Channel
- Stage of operation: DE
- 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/PIDA20050201

## Discrepancy

B-CHANNEL AUTO PILOT CAPTURES PRESELECTED ALTITUDE 300 FEET HIGH ON DESCENT BELOW FLIGHT LEVEL 20,000.  A-CHANNEL WORKS FINE.  PLACED B-AUTO PILOT ON MEL 22-1.

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