# SDR AALA20120919014

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 19, 2012
- Submitted: September 20, 2012
- Operation: Air carrier
- Aircraft: [N9624T](https://openairdocs.org/aircraft/N9624T), 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: 53594
- Aircraft time: 41,762 hours, 19,650 cycles
- System (JASC): [2120 · Air Distribution System](https://openairdocs.org/jasc/2120)
- Part: O-Ring
- Condition: Leaking
- Location: Ac Bay
- Stage of operation: CL
- How discovered: O
- Nature of condition: B
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA20120919014

## Discrepancy

DFW - CREW REPORTED ACRID ODOR DURING CLIMBOUT.  CREW ACCOMPLISHED QRH PROCEDURE.  EMERGENCY DECLARED FLIGHT RETURNED DFW LANDED WITHOUT INCIDENT.  AIRCRAFT REMOVED FROM SERVICE.  REPLACED O-RING THAT WAS LEAKING AT VERTICAL CONTROL VALVE.  SYSTEM GROUND CHECK NORMAL OPERATION.

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