# SDR ASAA2017112522670

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 25, 2017
- Submitted: November 27, 2017
- Operation: Air carrier
- Aircraft: [N433AS](https://openairdocs.org/aircraft/N433AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 41704
- Aircraft time: 16,323 hours, 5,346 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: DE
- 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/ASAA2017112522670

## Discrepancy

PACK LIGHT LEFT SIDE CAME ON DURING MASTER CAUTION RECAL AT TOP OF DECENT.  ACFT GROUNDED.  PERFORMED LEFT PACK ZONE TEMP CONTROLLER BITE IAW AMM 21-51-00-700-803.  NO FAULT IN BITE. PERFORMED VERIFY NUMEROUS TIMES.  NO FAULTS. TEST PASSED. OPERATED PACKS INDIVIDUALLY AND SIMULTANEOUSLY TO DUPLICATE FAULT IAW AMM 21-51-00-700-802. NO FAULT FOUND .OPERATIONAL TEST PASS. NO FAULT HISTORY IN 30 DAYS.

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