# SDR USAA2014102400007

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 23, 2014
- Submitted: December 3, 2014
- Operation: Air carrier
- Aircraft: N204UW
- Make and model: Boeing 757-23N
- Registry model: [Boeing 757-23N](https://openairdocs.org/model/boeing-757-23n) (OpenAirDocs)
- Aircraft serial: 30886
- Aircraft time: 45,763 hours, 13,433 cycles
- System (JASC): [2721 · Rudder Tab Control System](https://openairdocs.org/jasc/2721)
- Part: Trim Switch
- Part number: 024804002
- Condition: Failed
- Location: Cockpit
- Component: Control Panel, Boeing
- Component part number: 233T620121
- Stage of operation: CR
- How discovered: O
- Nature of condition: O
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/USAA2014102400007

## Discrepancy

PRIOR TO COAST OUT WHILE TRIMMING RUDDER NOSE LT, TRIM WAS MOVING VERY SLOW.  TRIMMED NOSE RT & TRIM SPEED WAS NORMAL.  WHEN ATTEMPTED NOSE LT AGAIN, RUDDER TRIM WOULD NOT WORK, STILL WILL TRIM NOSE RT.  MAINTENANCE R&R THE AILERON / RUDDER TRIM CONTROL MODULE.  VENDOR SHOP FINDINGS: UNIT FAILED PRELIMINARY FUNCTIONAL TESTING. VERIFIED CUSTOMER REASON FOR UNIT REMOVAL FROM AIRCRAFT. FOUND THE RUDDER TRIM SWITCH DEFECTIVE. REPLACED THE RUDDER TRIM SWITCH.

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