# SDR ASAA2017040520370

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 5, 2017
- Submitted: April 10, 2017
- Operation: Air carrier
- Aircraft: [N478AS](https://openairdocs.org/aircraft/N478AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 44105
- Aircraft time: 7,140 hours, 2,378 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Warning Light
- Condition: False Activation
- Location: Lt A/C Pack
- Stage of operation: NR
- How discovered: 9
- Nature of condition: N
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2017040520370

## Discrepancy

LEFT PACK LIGHT ILLUMINATED ON RECALL.  ACFT GROUNDED. RECONNECTED LEFT PACK FLOW CONTROL VALVE CONNECTOR.  OPENED FWD CARGO HEAT DUCT IAW AMM 21-00-00-440-801. ACCOMPLISHED BITE CHECK OF PACK ZONE TEMP CONTROLLERS IAW AMM 21-61-00-700-806-002.  WITH & WITHOUT BLEED AIR, BITE CHECK WAS GOOD WITH NO FAULTS.  NO LIGHTS ILLUMINATED ON RECALL.

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