# SDR CALA2022072501877

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 25, 2022
- Submitted: July 25, 2022
- Operation: Air carrier
- Aircraft: [N29717](https://openairdocs.org/aircraft/N29717), registered now
- Make and model: Boeing 737
- Aircraft serial: 28936
- Aircraft time: 69,282 hours, 24,388 cycles
- System (JASC): [2200 · Auto Flight System](https://openairdocs.org/jasc/2200)
- Part: None
- Part number: NA
- Condition: Faulty
- Location: Na
- Stage of operation: CR
- How discovered: O
- Nature of condition: O
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2022072501877

## Discrepancy

A AUTOPILOT WOULD NEVER ENGAGE B A/P WOULD ENGAGE FOR A  SECOND AND FAIL .SYSTEM SUSPECTS FAULTY ELEVATOR AUTOPILOT PRESSURE ENGAGE BUTTONS. REPLACED ELEVATOR A/P PRESSURE SWITCH, NO HELP. REPLACED ELEVATOR POSITION SENSOR M929 CAPABILITY.OPS CKS GOOD.

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