# SDR AALA990997

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 4, 1999
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: N710AA
- Make and model: Boeing 727223
- Aircraft serial: 22467
- System (JASC): [2210 · Autopilot System](https://openairdocs.org/jasc/2210)
- Part: Coupler
- Part number: 2588880901
- Condition: Defective
- Location: Autopilot
- Component: Honeywell
- Stage of operation: CR
- Nature of condition: F
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA990997

## Discrepancy

MIA - FLT 0971 - EN ROUTE BNA/MIA, HARD UNCOMMANDED RUDDER KICK TO THE RIGHT, AIRCRAFT ROLLED LEFT AS RESULT, AUTOPILOT DISENGAGED TO RECOVER AIRCRAFT.  INCIDENT ONLY OCCURRED ONCE.  ALL SUBSEQUENT INDICATIONS NORMAL.  FLIGHT 28,000, 300 KNOTS, SMOOTH AIR, KICK RESULTED IN APPROXIMATELY 10 DEGREE ROLL.  LANDED MIA WITHOUT FURTHER INCIDENT.  REPLACED UPPER AND LOWER YAW DAMPENER COUPLERS.  ACCOMPLISHED ADJUSTMENT TEST OF LOWER AND UPPER RUDDER POWER UNITS.  DOWNGRADED TO NOT CAT II.  SYSTEM GROUND CHECKED, NORMAL OPERATION.  (X)

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