# SDR ASMF201109009

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 23, 2011
- Submitted: October 4, 2011
- Operation: Air carrier
- Aircraft: N520AM
- Make and model: Boeing 737-81Q
- Registry model: [Boeing 737-81Q](https://openairdocs.org/model/boeing-737-81q) (OpenAirDocs)
- Aircraft serial: 29052
- Aircraft time: 32,896 hours, 11,104 cycles
- System (JASC): [2740 · Stabilizer Control System](https://openairdocs.org/jasc/2740)
- Part: Gearbox
- Condition: Lack Of Lube
- Location: Stab Trim
- Stage of operation: AP
- How discovered: O
- Nature of condition: F
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASMF201109009

## Discrepancy

CAPTAIN REPORTED THAT DURING APPROACH, THE STABILIZER TRIM WITH HIGH VIBRATION AND SOUND.  MX PERSONNEL WAS PERFORMED THE FIM 27-41-00 TASK 803 / 804 PROCEDURE, CONFIRMING THE FAILURE.   ACFT WAS SENT TO THE HANGAR AND THE HORIZ STABILIZER CONTROL SYS WAS CHECKED IAW MM 27-41-00, DETECTING STUCK THE GEARBOX; SO THE HORIZ STABILIZER JACKSCREW, BALL NUT AND UPPER GIMBAL WERE LUBRICATED AND TESTED IAW MM 12-22-41 AND MM 27-41-00, ALL CORRECT.

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