# SDR ASAA2014031507195

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 15, 2014
- Submitted: March 18, 2014
- Operation: Air carrier
- Aircraft: [N407AS](https://openairdocs.org/aircraft/N407AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 41731
- Aircraft time: 5,129 hours, 1,623 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Control Valve
- Part number: 3989084
- Part serial: 18495
- Condition: Malfunctioned
- Location: Rt A/C Pack
- Part time: 5,153 hours, 1,632 cycles
- Stage of operation: DE
- 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/ASAA2014031507195

## Discrepancy

RT PACK LIGHT ILLUMINATED DURING DESCENT EXTINGUISHED WITH RESET OF MASTER CAUTION. ACFT GROUNDED.  ACCOMPLISHED PACK-ZONE TEMP CONTROLLER BITE IAW AIM TASK 21-62, TASK 801.  NR 2 CONTROLLER SHOWS FAULT MESSAGE "TCV".  REPLACED RT TEMP CONTROL VALVE IAW AMM 21-61-15. BITE CK GOOD.

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