# SDR FDEA201504221274

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 22, 2015
- Submitted: April 22, 2015
- Operation: Air carrier
- Aircraft: [N936FD](https://openairdocs.org/aircraft/N936FD), registered now
- Make and model: Boeing 757-2T7
- Registry model: [Boeing 757-2T7](https://openairdocs.org/model/boeing-757-2t7) (OpenAirDocs)
- Aircraft serial: 23293
- Aircraft time: 881 hours, 31,870 cycles
- System (JASC): [2720 · Rudder Control System](https://openairdocs.org/jasc/2720)
- Part: Servo
- Condition: Malfunctioned
- Location: Rudder
- Stage of operation: CL
- How discovered: O
- Nature of condition: F
- Precautionary procedure: J, B, A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/FDEA201504221274

## Discrepancy

AFTER TAKEOFF RUDDER STARTED CYCLING LT TO RT.  RUDDER CYCLE BECAME MORE VIOLENT THE FASTER  WE WENT.  SLOWED TO 220KTS & LEVELED OFF AT 15000'.  STATUS MSG, RUDDER PCU.  NO QRH TO LOOK AT, RETURNED TO LAND.  REPLACED YAW DAMP MODULE & YAW DAMP SERVO.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.