# SDR NWAA073325531

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 30, 2007
- Submitted: October 1, 2007
- Operation: Air carrier
- Aircraft: N531US
- Make and model: Boeing 757251
- Aircraft serial: 23846
- Aircraft time: 62,768 hours, 25,875 cycles
- System (JASC): [2161 · Cabin Temperature Controller](https://openairdocs.org/jasc/2161)
- Part: Controller
- Part number: 6259346
- Part serial: 23288
- Condition: Malfunctioned
- Location: A/C Pack Temp
- Part time: 56,334 hours, 23,403 cycles
- Stage of operation: CL
- How discovered: O
- Nature of condition: M, J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/NWAA073325531

## Discrepancy

DURING CLIMB-OUT FROM DTW, CABIN AND FLIGHT DECK BECAME VERY HOT.  COM PROCEDURE TO ALLEVIATE HEAT COMING FROM PACK WAS INEFFECTIVE.  EMERGENCY WAS DECLARED AND AIRCRAFT RETURNED TO DTW FOR A UNEVENTFUL LANDING.  MAINTENANCE REMOVED AND REPLACED 2 TEMP SENSORS, STANDBY PACK TEMP CONTROLLER AND ZONE TEMP CONTROLLER.

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