# SDR ASAA2016081717735

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 17, 2016
- Submitted: August 19, 2016
- Operation: Air carrier
- Aircraft: [N433AS](https://openairdocs.org/aircraft/N433AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 41704
- Aircraft time: 11,396 hours, 3,657 cycles
- System (JASC): [2160 · Cabin Temperature Control System](https://openairdocs.org/jasc/2160)
- Part: Control Valve
- Part number: 3989085
- Part serial: 8951
- Condition: Failed
- Location: Cabin Temp
- Part time: 34,974 hours, 10,816 cycles
- 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/ASAA2016081717735

## Discrepancy

AFTER ENGINE START,  LEFT PACK LIGHT ILLUMINATED, EXTINGUISHED WITH MASTER CAUTION.  ACFT GROUNDED.  PERFORMED PACK TEMP CONTROLLER BITE TEST IAW AMM 21-51-00-700-80. LT PACK LOGGED "TCV" FAULT.  REMOVED & REPLACED THE LT TEMP CONTROL VALVE IAW AMM 21-51-10/401.

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