# SDR ASAA2020022753282

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 25, 2020
- Submitted: February 27, 2020
- Operation: Air carrier
- Aircraft: [N491AS](https://openairdocs.org/aircraft/N491AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 44109
- Aircraft time: 17,189 hours, 5,543 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Warning Message
- Condition: False Activation
- Location: Cockpit Temp
- Stage of operation: TX
- 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/ASAA2020022753282

## Discrepancy

AFTER PUSHBACK DOING RECALL CHECK, GOT CONT CAB ZONE TEMP LIGHT. GROUNDED - YES. CLEARED CONT. CABIN TRIM VLV FAULT , ON NO 2 PAC ZONE TEMP CONTROLLER. ACCOMPLISHED BITE TEST PER B737-900 AMM 21-61-00. NO CURRENT FAULTS NOTED . THIS CLEARS MEL 21-21G AND C/N 25035491. PLACARD REMOVED SEAMC MARK NOTIFIED.

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