# SDR AALA20110101TUL01

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 1, 2011
- Submitted: May 17, 2011
- Operation: Air carrier
- Aircraft: [N436AA](https://openairdocs.org/aircraft/N436AA), registered now
- Make and model: Doug DC-9-83
- Registry model: [Doug DC-9-83](https://openairdocs.org/model/douglas-dc-9-83) (OpenAirDocs)
- Aircraft serial: 49454
- Aircraft time: 74,207 hours, 34,139 cycles
- System (JASC): [2910 · Hydraulic System, Main](https://openairdocs.org/jasc/2910)
- Part: Control Valve
- Condition: Leaking
- Location: Hydrauilic Sys
- Stage of operation: CL
- How discovered: O
- Nature of condition: K
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA20110101TUL01

## Discrepancy

YYC - CREW REPORTED LOSS OF HYDRAULIC PRESSURE.  EMERGENCY DECLARED FLIGHT RETURNED YYC LANDED WITHOUT INCIDENT.  AIRCRAFT REMOVED FROM SERVICE.  REPLACED RIGHT THRUST REVERSER CONTROL VALVE AND RUDDER SHUTOFF VALVE.  SYSTEM GROUND CHECK NORMAL OPERATION.

---
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.