# SDR AALA202604215384

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 19, 2026
- Submitted: April 22, 2026
- Operation: Air carrier
- Aircraft: [N960AN](https://openairdocs.org/aircraft/N960AN), registered now
- Make and model: Boeing 737823
- Aircraft serial: 29542
- Aircraft time: 70,624 hours, 30,051 cycles
- System (JASC): [2210 · Autopilot System](https://openairdocs.org/jasc/2210)
- Part: Control Panel
- Condition: Failed
- Location: Autopilot
- Component: Autopilot Sys, Hnywl
- Component part number: 8221567104
- Stage of operation: CL
- How discovered: O
- Nature of condition: F
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202604215384

## Discrepancy

AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED DUE TO: DURING INITIAL CLIMB OUT WHEN GIVEN A HIGHER ALTITUDE, MCP ALTITUDE WINDOW STOPPED AT 4100 AND WOULD NOT ALLOW ANY FURTHER ADJUSTMENTS. AIRCRAFT AIR INTERRUPTED BACK TO AND LANDED SAFELY AT IAH.  REMOVED AND REPLACED MODE CONTROL PANEL, PER AMM 22-11-34-00-801 AND PERFORMED BITE TEST, PER 22-11-00-810-801. ALL TEST PASSED AT THIS TIME NO DEFECTS NOTED AT THIS TIME.

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