# SDR ABXA20230522112

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 19, 2023
- Submitted: May 22, 2023
- Operation: Air carrier
- Aircraft: [N312AA](https://openairdocs.org/aircraft/N312AA), registered now
- Make and model: Boeing 767223
- Aircraft serial: 22315
- Aircraft time: 92,791 hours, 23,867 cycles
- System (JASC): [2721 · Rudder Tab Control System](https://openairdocs.org/jasc/2721)
- Part: Actuator
- Part number: 3790011107
- Part serial: 0480
- Condition: Leaking
- Location: Zone 300
- Stage of operation: TX
- How discovered: V
- Nature of condition: J
- Precautionary procedure: D
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ABXA20230522112

## Discrepancy

RUDDER RATIO EICAS MESSAGE AFTER ENGINE START. AIRCRAFT BACK TO BLOCK AND GROUNDED BY MAINTENANCE. MAINTENANCE REMOVED AND REPLACED RUDDER RATIO ACTUATOR ASSY. IAW B767 AMM CHAPT. 27-21-15. RAN HYD SYSTEMS, NO LEAKS NOTED. NO EICAS MESSAGE APPEARS. AIRCRAFT RETURNED TO SERVICE.

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