# SDR AALA991429

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 20, 1999
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: [N386AA](https://openairdocs.org/aircraft/N386AA), registered now
- Make and model: Boeing 767323
- Aircraft serial: 27060
- System (JASC): [2760 · Drag Control System](https://openairdocs.org/jasc/2760)
- Part: O-Ring
- Condition: Torn
- Location: Nr 9 Spoiler
- Stage of operation: CL
- Nature of condition: K, J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA991429

## Discrepancy

ORD - FLT 84 - AFTER TAKEOFF ORD-FRA, CENTER HYDRAULIC SYSTEM LOST QUANTITY FOLLOWED BY LOSS OF PRESSURE.  RESERVE BRAKES/STEERING SWITCH SELECTED FOLLOWING GEAR EXTENSION WHICH MOMENTARILY RESTORED PRESSURE.  ALTERNATE FLAP EXTENSION PERFORMED.  AIRCRAFT RETURNED TO ORD AND LANDED WITHOUT INCIDENT.  REPLACED O-RING IN NR 9 SPOILER ACTUATOR.  ALSO, REPLACED AC MOTOR DRIVEN HYDRAULIC PUMPS, AIR DRIVEN HYDRAULIC PUMP, AND FILTERS AS PRECAUTIONARY MEASURE.  SYSTEM GROUND CHECKED NORMAL OPERATION.  (M)

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