# SDR UPS06647836

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 30, 2006
- Submitted: September 1, 2006
- Operation: Air carrier
- Aircraft: [N306UP](https://openairdocs.org/aircraft/N306UP), registered now
- Make and model: Boeing 767-300
- Registry model: [Boeing 767-300](https://openairdocs.org/model/boeing-767-300) (OpenAirDocs)
- Aircraft serial: 27759
- System (JASC): [2720 · Rudder Control System](https://openairdocs.org/jasc/2720)
- Part: Servo
- Condition: Malfunctioned
- Location: Yaw Damper
- Stage of operation: NR
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UPS06647836

## Discrepancy

UNCOMMANDED RUDDER YAW TWICE IN FLIGHT.   R & R LT & RT YAW DAMPER SERVO IAW MM 22-21-02-4. LEAK CHECK RIGHT & LEFT YAW DAMPER SERVO PER TECH SERVICES. R&R RIGHT YAW DAMPER MODULE ASSY IAW MM 22-21-04-2. ALSO R&R LEFT YAW DAMPER MODULE ASSY AS PRECAUTIONARY. PERFORMED MCDP BITE TEST 09,30,40,69 PER MM 22-00-02-2 & FIM 22-21-00 YAW DAMPER SYSTEM BITE. NO FAULTS NOTED

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