# SDR ASAA2016062617171

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 26, 2016
- Submitted: June 28, 2016
- Operation: Air carrier
- Aircraft: [N477AS](https://openairdocs.org/aircraft/N477AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 40716
- Aircraft time: 4,242 hours, 1,363 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Warning System
- Condition: False Activation
- Location: Cockpit
- Stage of operation: TX
- How discovered: O
- Nature of condition: N
- Precautionary procedure: D
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2016062617171

## Discrepancy

AFTER STARTING BOTH ENGINES, PERFORMED A SYSTEM RECALL.  ON RECALL THE AIR CONDITION ILLUMINATED IN THE 6-PACK.  ON THE OVERHEAD PANEL THERE WAS A CONTROLLER CABIN ZONE TEMP AND LT AND RT PACK LIGHTS.  PERFORMED QRH FOR THE PACK LIGHTS AND NEITHER LIGHT CLEARED.  ACFT GROUNDED.  BITE TEST OF NR 1 PACK ZONE TEMP CONTROLLER LOGGED.  MIX MANIFOLD SENSOR AND NR 2 PACK ZONE TEMP CONTROLLER LOGGED.  MIX MANIFOLD SENSOR AND DUCT SENSOR.  CLEARED LOGGED FAULTS ON BOTH CONTROLLERS.  BITE TEST NORMAL, REF AMM TASK 21-62-00-810-801.  OPERATED BOTH PACKS, NO DEFECTS NOTED.

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