# SDR FDEA202610021468

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 2, 2026
- Submitted: October 2, 2026
- Operation: Air carrier
- Aircraft: [N988FD](https://openairdocs.org/aircraft/N988FD), registered now
- Make and model: Boeing 757222
- Aircraft serial: 26705
- Aircraft time: 68,639 hours, 27,499 cycles
- System (JASC): [2720 · Rudder Control System](https://openairdocs.org/jasc/2720)
- Part: Rudder Control
- Condition: Abnormal
- Location: Zone 300
- Stage of operation: CL
- How discovered: O
- Nature of condition: F
- Precautionary procedure: B, A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/FDEA202610021468

## Discrepancy

UPON TAKEOFF, ONCE AIRBORNE RUDDER BEGAN YAWING LEFT AND RIGHT AT ABOUT 1 HZ. CONTINUED YAWING LEFT  RIGHT LEFT RIGHT THE ENTIRE DURATION OF THE FLIGHT. LEVELED OFF AT 8000 FEET AND SLOWED TO 230 KN AND CONTINUE   TO BRING THE SPEED BACK TO TRY TO KEEP AERODYNAMIC FORCES OFF OF THE VERTICAL STABILIZER AND RUDDER. TRIED TO   PUT PRESSURE ON THE RIGHT RUDDER MANUALLY DID NULL THE OSCILLATIONS. TRIED THE LEFT RUDDER DID NOT AFFECT THE   OSCILLATIONS. OSCILLATIONS CONTD WITH THE LEFT AUTO PILOT ENGAGED, DISENGAGED THE AUTO PILOT STILL NO EFFECT.  SELECTED VNAV, SPEED, FLIGHT LEVEL CHANGE AND VERTICAL SPEED NO CHANGES. CONFIGURED THE FLAPS 1 AT 200   KN, NO CHANGE. FINALLY ON FINAL FULLY CONFIGURED AT 150 KN WAS ABLE TO PUT PRESSURE ON A RUDDER NULLED OUT   THE ISOLATIONS. LANDED SAFELY. NO EICAS THROUGHOUT THE EVENT. NO WARNING LIGHTS, NO YAW DAMPER, RUDDER   RATIO, ETC. NO INDICATIONS OF CAUSE OF FAILURE.  ***EMERGENCY DECLARED***

---
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.