# SDR ASAA2017040420358

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 4, 2017
- Submitted: April 6, 2017
- Operation: Air carrier
- Aircraft: [N474AS](https://openairdocs.org/aircraft/N474AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 40715
- Aircraft time: 6,890 hours, 2,279 cycles
- System (JASC): [2160 · Cabin Temperature Control System](https://openairdocs.org/jasc/2160)
- Part: Controller
- Part number: 510901601
- Part serial: 5109016002024
- Condition: Failed
- Location: Nr 1 A/C Pack
- Part time: 6,871 hours, 2,248 cycles
- Stage of operation: NR
- 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/ASAA2017040420358

## Discrepancy

LEFT PACK LIGHT ILLUMINATED ON RECALL. ACFT GROUNDED.  REMOVED & REPLACED THE NR 1 PACK TEMP CONTROLLER. OPS NORMAL IAW AMM 21-62-20/401.

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