# SDR C2XA03IA045

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 2, 2003
- Submitted: May 6, 2003
- Operation: Air carrier
- Aircraft: N17521
- Make and model: Emb EMB-135LR
- Registry model: [EMB EMB-135LR](https://openairdocs.org/model/embraer-emb-135lr) (OpenAirDocs)
- Aircraft serial: 145378
- System (JASC): [2133 · Pressure Regulator/Outflow Valve](https://openairdocs.org/jasc/2133)
- Part: Line
- Part number: 14520402431
- Condition: Loose
- Location: Outflow Valve
- Stage of operation: CL
- How discovered: O
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/C2XA03IA045

## Discrepancy

THE CREW NOTED AN UNCONTROLABLE PRESSURE RISE ON TAKEOFF.  THE CREW RETURNED TO MEM AND LANDED WITHOUT INCIDENT.  MAINTENANCE RELEASED THE AIRCRAFT IAW MEL.  MAINTENANCE TIGHTENED A LINE ON THE PNEUMATIC OUTFLOW VALVE, PERFORMED A OPERATIONAL CHECK OF THE PRESSURIZATION SYSTEM, NO DEFECTS NOTED AND THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE.

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