# SDR CALA2014102101364

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 20, 2014
- Submitted: October 21, 2014
- Operation: Air carrier
- Aircraft: [N73860](https://openairdocs.org/aircraft/N73860), registered now
- Make and model: Boeing 757-33N
- Registry model: [Boeing 757-33N](https://openairdocs.org/model/boeing-757-33n) (OpenAirDocs)
- Aircraft serial: 32584
- Aircraft time: 36,430 hours, 10,542 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Control Valve
- Part number: 3964304
- Condition: Failed
- Location: Ac Pack
- Stage of operation: DE
- How discovered: O
- Nature of condition: J
- Precautionary procedure: B
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2014102101364

## Discrepancy

AT 34,000 FT THE LT DUCT PRESS FLUCTUATED FOLLOWED BY A RT PACK OVER TEMP & FAILURE IAW LOG 7858640.  REPLACE RT PACK LOW LIMIT IAW7858636, LT PACK VLV REPLACED.  PERFORMED 05-51-24-702-001 ALL WITHIN LIMITS.  EMER DECLARED

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