# SDR ASAA2018012023220

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 20, 2018
- Submitted: January 23, 2018
- Operation: Air carrier
- Aircraft: [N433AS](https://openairdocs.org/aircraft/N433AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 41704
- Aircraft time: 16,878 hours, 5,546 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Warning System
- Condition: False Activation
- Location: Cockpit
- Stage of operation: CL
- How discovered: O
- Nature of condition: N
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2018012023220

## Discrepancy

LEFT PACK LIGHT ILLUMINATED ON CLIMBOUT. TRIP RESET UNSUCCESSFUL. SINGLE PACK (RIGHT) WORKS OK. GROUNDED - YES. BITE CHECK ON LEFT PACK ZONE TEMPERATURE CONTROLLER PER AMM 21-51-00-700-803, NO FAULTS NOTED.

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