# SDR ASAA2015022010710

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 20, 2015
- Submitted: February 23, 2015
- Operation: Air carrier
- Aircraft: [N518AS](https://openairdocs.org/aircraft/N518AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35693
- Aircraft time: 23,420 hours, 7,005 cycles
- System (JASC): [2160 · Cabin Temperature Control System](https://openairdocs.org/jasc/2160)
- Part: Warning Light
- Condition: False Activation
- Stage of operation: TX
- 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/ASAA2015022010710

## Discrepancy

UPON PUSH BACK STARTUP IN MCO MASTER CAUTION RECALL TEST REVEALED ZONE TEMP LIGHT ILLUMINATED EXTINGUISHED WHEN MASTER CAUTION RESET BUTTON PRESSED.  ACFT GROUNDED.  PERFORMED BITE CK OF NR 2 TEMP CONTROLLER.  FOUND INTERMITTENT FAULT.

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