# SDR ASAA1057492

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 5, 2010
- Submitted: March 9, 2010
- Operation: Air carrier
- Aircraft: [N566AS](https://openairdocs.org/aircraft/N566AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35181
- Aircraft time: 12,091 hours, 3,753 cycles
- System (JASC): [2160 · Cabin Temperature Control System](https://openairdocs.org/jasc/2160)
- Part: Controller
- Part number: 6228145
- Part serial: 059C232
- Condition: Intermittent
- Location: E&E Bay
- Part time: 24,906 hours, 10,899 cycles
- Stage of operation: TX
- How discovered: O
- Nature of condition: J
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA1057492

## Discrepancy

RIGHT PACK LIGHT ILLUMINATES ON RECALL RESETS WHEN MASTER CAUTION IS RESET.  PERFORMED PACK /ZONE TEMP CONTROLLER BITE TEST PER M/M 21 61 00 ON NR 2 CONTROLLER CONFIRMED FAULT FOUND INTERMITTENT FAULT ON RAM AIR ACTUATOR REPLACED SAME PER M/M 21 51 21.  STILL HAD INTERMITTENT FAULTS ON FLT DECK TRIM VALVE AND TCV.  SWAPPED NR 1 AND NR 2 ZONE/TEMP CONTROLLERS FOUND INTERMITTENT FAULTS FOLLOWED CONTROLLER RETURNED CONTROLLERS TO ORIGINAL POSITION.  REMOVED AND REPLACED NR 2 CONTROLLER PER M/M 21 61 20.  RAN BITE TEST SIX TIMES, OPS CHECK GOOD.

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