# SDR AALA202502102761

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 8, 2025
- Submitted: February 10, 2025
- Operation: Air carrier
- Aircraft: [N907NN](https://openairdocs.org/aircraft/N907NN), registered now
- Make and model: Boeing 737823
- Aircraft serial: 31158
- Aircraft time: 35,991 hours, 15,562 cycles
- System (JASC): [2210 · Autopilot System](https://openairdocs.org/jasc/2210)
- Part: Control Unit
- Part number: 4082499903
- Condition: Failed
- Location: Zone 100
- Stage of operation: AP
- How discovered: O
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202502102761

## Discrepancy

AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS NOT DECLARED DUE TO: DURING APPROACH AUTO THROTTLE MOVEMENT WAS NOT SYMMETRICAL WITH NUMBER 2 THRUST LEVER LEADING NUMBER 1 BY ONE KNOB LENGTH. AT GLIDESLOPE INTERCEPT NUMBER 2 THRUST LEVER ADVANCED TOWARD GO AROUND THRUST WITH NUMBER 1 THROTTLE LAGGING BY APPROXIMATELY 5 KNOB LENGTHS; AIRCRAFT AIR INTERRUPTED BACK TO AND LANDED SAFELY AT MIA. REPLACED FLIGHT CONTROL COMPUTER-A. PER MM 22-11-33 AND ACCOMPLISHED DFCS TEST PER MM 23-11-00, OPERTIONAL CHECK NORMAL.

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