# SDR 252TR0005

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 23, 2003
- Submitted: June 27, 2003
- Operation: Air carrier
- Aircraft: N252TR
- Make and model: Boeing 737228
- Aircraft serial: 23001
- Aircraft time: 39,563 hours, 31,089 cycles
- System (JASC): [2210 · Autopilot System](https://openairdocs.org/jasc/2210)
- Part: Coupler
- Part number: 2590650901
- Condition: Inoperative
- Location: Mach Trim
- Stage of operation: CR
- 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/252TR0005

## Discrepancy

AUTO PILOT AT 315 KTS TRIM ROLLS BACK AND FORTH 3 TURNS EACH DIRECTION.  REPLACED MACH TRIM COUPLER IAW MM 22-21-0.  OPS TEST NORMAL.

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