# SDR 08FDEA01643

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 28, 2008
- Submitted: April 29, 2008
- Operation: Air carrier
- Aircraft: N215FE
- Make and model: Boeing 727-2S2F
- Registry model: [Boeing 727-2S2F](https://openairdocs.org/model/boeing-727-2s2f) (OpenAirDocs)
- Aircraft serial: 22936
- Aircraft time: 31,905 hours, 18,590 cycles
- System (JASC): [2160 · Cabin Temperature Control System](https://openairdocs.org/jasc/2160)
- Part: Control Box
- Part number: 6075103
- Part serial: 01405745
- Condition: Failed
- Location: Cabin Temp
- 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/08FDEA01643

## Discrepancy

FL 340 SCHEDULE CABIN 5200 FEET CABIN UNCONTROLLED CLIMB TO 126500 FEET.  REMOVED AND REPLACED TEMP CNTL BOX IAW MM 21-55-091-5, CONTROL BOX AND THE 35 DEGREE CONTROL VALVE OPS  CHECK NORMAL.  REPLACED LEFT FLOW CONTROL MODULATING AND SHUTOFF VALVE REF M/M 36-12-061, OPS CKS GOOD.  PERFORMED HIGH PRESSURE BLEED CONTROL CHECK PER JRH CHAPTER 8.  OPS CKS GOOD.  ALSO, PERFORMED  PRESSURIZATION CONTROL SYSTEM TEST REF 21-31-000.  ALL CHECKS GOOD, OK FOR SERVICE.

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