# SDR AALA201906049019

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 3, 2019
- Submitted: June 19, 2019
- Operation: Air carrier
- Aircraft: [N163US](https://openairdocs.org/aircraft/N163US), registered now
- Make and model: Airbus A321-211
- Registry model: [Airbus A321-211](https://openairdocs.org/model/airbus-a321-211) (OpenAirDocs)
- Aircraft serial: 1417
- Aircraft time: 60,617 hours, 22,943 cycles
- System (JASC): [2720 · Rudder Control System](https://openairdocs.org/jasc/2720)
- Part: Feel Unit
- Part number: D27270400012
- Part serial: TH1667
- Condition: Faulted
- Location: Rudder System
- Part time: 60,626 hours, 22,946 cycles
- Stage of operation: AP
- How discovered: O
- Nature of condition: E
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA201906049019

## Discrepancy

AIRCRAFT WAS GROUNDED: STRONG VIBRATION IN RUDDER PEDALS 2000' AGL BEFORE GEAR EXTENSION TO 500' AGL GEAR DOWN VIBRATION CONTINUED 20 SECONDS AFTER AUTOPILOT OFF. PEDALS LEFT AND RIGHT BOTH SIDES CAPT & FO MOVING 3/8" DISPLACEMENT. PUSHING ON BOTH PEDALS WOULD NOT STOP PEDALS FROM JUMPING AROUND, WENT AWAY AT 500' AGL.   MAINTENANCE REPLACED THE ARTIFICIAL FEEL AND TRIM UNIT IAW AMM 27-23-41-4 00-001-A AND PERFORMED OPERATIONAL TEST OF THE ARTIFICAL FEEL AND TRIM UNIT IAW AMM 27-23-00-710-001-A AND 27-23-00-710-001-A-01 AND PERFORMED OPERATIONAL TEST OF THE RUDDER TRIM ACTUATION IAW AMM 27-22-00-710-002-A AND TESTS ARE OK.

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