# SDR QXEA2026080700172

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 5, 2026
- Submitted: August 8, 2026
- Operation: Air carrier
- Aircraft: [N637QX](https://openairdocs.org/aircraft/N637QX), registered now
- Make and model: Emb ERJ 170-200 LR
- Registry model: [EMB ERJ 170-200 LR](https://openairdocs.org/model/embraer-s-a-erj-170-200-lr) (OpenAirDocs)
- Aircraft serial: 17000755
- Aircraft time: 20,278 hours, 14,653 cycles
- System (JASC): [2722 · Rudder Actuator](https://openairdocs.org/jasc/2722)
- Part: Pcu
- Part number: 4154001009
- Part serial: 1838A
- Condition: Malfunctioned
- Location: Zone 300
- Part time: 19,059 hours, 15,249 cycles
- Stage of operation: NR
- How discovered: O
- Nature of condition: F
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/QXEA2026080700172

## Discrepancy

FLIGHT 2152. DURING FLT HAD TWO EVENTS OF EXCESSIVE RT YAW MOVEMENTS.  FIRST EVENT FL280 IN CRUISE FOR ABOUT 5 SECS, EVENT SELF CORRECTED.  SECOND EVENT ON INITIAL DESCENT SUDDEN MOVEMENT TO RT.  LASTED 2-3 MINUTES.  AP WAS MANUALLY DISCONNECTED & YAW TRIM USED.  USED ABOUT 3/4 OF TRIM TO LT.  EVENT CORRECTED SLOWLY AND TRIM WAS NEUTRALIZED.  AP ENGAGED BOTH EVENTS.  PFD INDICATION SHOWED FULL DEFLECTION TO LT.  TURBULANCE NILL/ CROSSWIND UNKOWN. LANDING UNEVENTFUL. REMOVED FROM SERVICE. REPLACED  UPPER RUDDER PCU. REF LOGPAGE 1152017 FOR OPS CHKD FLT RELEASE. FLIGHT PASSED. RETURNED TO SERVICE.

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