# SDR UIEA2017020800166

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 7, 2017
- Submitted: February 8, 2017
- Operation: Air carrier
- Aircraft: [N412MC](https://openairdocs.org/aircraft/N412MC), registered now
- Make and model: Boeing 747-47UF
- Registry model: [Boeing 747-47UF](https://openairdocs.org/model/boeing-747-47uf) (OpenAirDocs)
- Aircraft serial: 30559
- Aircraft time: 69,575 hours, 10,999 cycles
- System (JASC): [2741 · Stabilizer Position Indicating](https://openairdocs.org/jasc/2741)
- Part: Limit Switch
- Condition: Out Of Adjust
- Location: Stab Trim
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UIEA2017020800166

## Discrepancy

FUNCTIONAL FAIL OF THE STABILIZER TRIM CONTROL COLUMN CUTOUT SWITCHES AND CIRCUIT. PERFORM WIRING CONTINUITY CHECK FORM SRM TO STAB TRIM CONTROL MODULE RESULT WAS SATISFACTORY  IAW WDM 27-41-11 AND 27-41-24 REV 41.  PERFORMED STABILIZER TRIM ELEVATOR CONTROL ACTUATED LIMIT SWITCH ADJUSTMENT IAW AMM 27-41-07-835-001 REV 88 STEP A TO E.  PERFORM OPERATIONAL TEST, RESULT WAS NORMAL IAW AMM 27-41-07-835-001 REV 88 STEP E(4).

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