# SDR CALA2013100291670

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 28, 2013
- Submitted: October 4, 2013
- Operation: Air carrier
- Aircraft: [N105UA](https://openairdocs.org/aircraft/N105UA), registered now
- Make and model: Boeing 747451
- Aircraft serial: 26473
- Aircraft time: 78,681 hours, 9,213 cycles
- Engine: Pwa PW4056
- System (JASC): [3251 · Steering Unit](https://openairdocs.org/jasc/3251)
- Part: Actuator
- Condition: Failed
- Location: Lt Blg
- Stage of operation: TX
- How discovered: O
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2013100291670

## Discrepancy

BLG STEERING MALFUNCTION ON PUSHBACK FROM GATE.  RT SIDE TURNS, LT SIDE FAILS TO MOVE.  CHECKED HISTORY, NON FDE.  FOUND MESSAGE 'LEFT BODY GEAR LEFT ACTUATOR LOCK SWITCHES DISAGREE'.  REPLACED LT BLG, LT ACTUATOR IAW AMM.  GROUND TEST & LEAK CHECK PASSED.

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