# SDR ASAA2016060316932

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 3, 2016
- Submitted: June 6, 2016
- Operation: Air carrier
- Aircraft: [N419AS](https://openairdocs.org/aircraft/N419AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 41734
- Aircraft time: 12,829 hours, 4,173 cycles
- System (JASC): [2160 · Cabin Temperature Control System](https://openairdocs.org/jasc/2160)
- Part: Control Valve
- Part number: 3989083
- Part serial: 19090
- Condition: Failed
- Location: Temperature
- Part time: 12,824 hours, 4,171 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/ASAA2016060316932

## Discrepancy

RIGHT "PACK" LIGHT ILLUMINATED DURING MASTER RECALL ON DESCENT, CHECK LIGHT EXTINGUISHES WHEN MASTER CAUTION RESET.  ACFT GROUNDED. CONFIRMED FAULT, RT PACK/ZONE TEMPERATURE CONTROLLER BITE, REF AMM TASK 21-61-00-700-806-002 SHOWS HARD FAILURE, TCV NR 2, V141, WOULD NOT RESET. GVI TCV NR 2 SHOWS OIL LEAKING.  R & R TCV NR 2, REF AMM TASK 21-51-10, GROUND FUNCTIONAL CHECK AND LEAK CHECK NORMAL.

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