# SDR CA020221009

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 1, 2002
- Submitted: March 21, 2002
- Operation: General aviation
- Make and model: Boeing 757-28A
- Registry model: [Boeing 757-28A](https://openairdocs.org/model/boeing-757-28a) (OpenAirDocs)
- Aircraft time: 29,089 hours
- Engine: Rroyce RB211535E437
- System (JASC): [2170 · Humidity Control System](https://openairdocs.org/jasc/2170)
- Part: Clamp
- Condition: Loose
- Location: Precooler
- Stage of operation: CL
- How discovered: O
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CA020221009

## Discrepancy

(CAN) WHEN REACHING FL330 , THE CABIN ALTITUDE LIGHT CAME NI AND THE RT PACK INOP LIGHT CAME N. WE STARTED DESCENT, THE CABIN STABILIZED AT FL 250. THE RT PACK WAS RESETTED AND FOUND OK. THE CREW STAYED AT THAT LEVEL FOR THE REMAINDER OF THE FLIGHT . MAINTENANCE FOUND A COUPLING /CLAMP ON THE PRECOOLER LINE LOOSE  THE COUPLING / CLAMP WAS RESECURED & LEAK CHECKED SERVICEABLE.

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