# SDR 2002UALA00921

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 25, 2002
- Submitted: June 11, 2002
- Operation: Air carrier
- Aircraft: N370UA
- Make and model: Boeing 737322
- Aircraft serial: 24539
- Aircraft time: 38,162 hours, 26,095 cycles
- Engine: Ge CFM56*
- System (JASC): [2720 · Rudder Control System](https://openairdocs.org/jasc/2720)
- Part: Pcu
- Part number: MR272761545
- Part serial: 2293ABC
- Condition: Malfunctioned
- Location: Rudder
- Stage of operation: AP
- How discovered: O
- Nature of condition: E, F
- Precautionary procedure: L
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2002UALA00921

## Discrepancy

LANDED UNDER AMBER ALERT FOR RUDDER VIBRATION.  SUPPLEMENTAL DATA UPDATE NUMEROUS FLIGHT CONTROL AND HYDRAULIC SYSTEM COMPONENTS WERE TESTED.  A VERIFICATION TEST FLIGHT WAS PERFORMED TO CHECK FOR VIBRATION.  DURING THE TEST FLIGHT; THERE WERE NO VIBRATIONS.

---
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.