# SDR ASAA2013022393962

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 23, 2013
- Submitted: February 26, 2013
- Operation: Air carrier
- Aircraft: [N531AS](https://openairdocs.org/aircraft/N531AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35199
- Aircraft time: 11,038 hours, 3,406 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Control Valve
- Condition: Malfunctioned
- Location: A/C Pack
- Stage of operation: TX
- How discovered: O
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2013022393962

## Discrepancy

ON MASTER CAUTION RECALL,  RT PACK LIGHT ILLUMINATES.  DID THE QRH PROCEDURE - THE RT PACK LIGHT WENT OUT ON RESET.  ACCOMPLISHED ZONE TEMP CONTROLLER BITE IAW FIM 21-62, TASK 801 - NR 2 CONTROLLER SHOWED FAULT THIS PACK TCV.  PERFORMED T/S FOR TCV FAULT IAW FIM 21-62, TASK 831, INITIAL EVALUATION DID NOT CONFIRM FAULT AND FAULT CLEARED WITH VERIFY TEST.  OPERATED RIGHT IAW MM 21-00-00-800-803,  PACK OPERATED NORMALLY AND AFTERWARDS ZONE TEMP CONTROLLER BITE SHOWED NO FAULTS.

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