# SDR 97UAL900561

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 20, 1997
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: [N772UA](https://openairdocs.org/aircraft/N772UA), registered now
- Make and model: Boeing 777222
- Aircraft serial: 26930
- Engine: Pwa PW4077
- System (JASC): [2210 · Autopilot System](https://openairdocs.org/jasc/2210)
- Part: Auto Pilot
- Condition: Malfunctioned
- Location: E/E Compt
- Stage of operation: DE
- Nature of condition: F
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/97UAL900561

## Discrepancy

WITH A/P ENGAGED AND SPEED BRAKE EXTENDED TO FULL UP POS.  ON DESCENT PLANE TRIED TO NOSE DIVE UP TO 10 DEG NOSE DOWN. DESCENT RATE WENT TO 5880 FPM.  DISENGAGED A/P WORKED FINE. TRIED A 2ND TIME WITH A/P ENGAGED SAME PROBLEM.  WITH A/P DISENGAGED USED SPEED BRAKE TWICE WITH NO NOSE DOWN EXCESS.

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