# SDR 96UAL900720

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 21, 1996
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: N7454U
- Make and model: Boeing 727222
- Aircraft serial: 21908
- Engine: Pwa JT8D15
- System (JASC): [3422 · Directional Gyro and Indicating System](https://openairdocs.org/jasc/3422)
- Part: Direct Gyro
- Part number: 25883024
- Condition: Failed
- Location: Nr 1
- Component: 4O30951901
- Stage of operation: CR
- Nature of condition: F
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/96UAL900720

## Discrepancy

UPON ENGAGEMENT OF THE AILERON CHANNEL OF THE AUTOPILOT, MODE A, HARD UNCOMMANDED ROLL TO THE RIGHT OCCURS.   SAME CONDITION OCCURS IN MODE B BUT AT A REDUCED RATE AND CORRECTS ITSELF.   REPLACED ROLL COMPUTER AND NR 1 DIRECTIONAL GYRO DUE TO FAILURE.

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