# SDR ASAA2019021528189

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 15, 2019
- Submitted: February 20, 2019
- Operation: Air carrier
- Aircraft: [N433AS](https://openairdocs.org/aircraft/N433AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 41704
- Aircraft time: 21,092 hours, 6,893 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: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2019021528189

## Discrepancy

LEFT PACK ILLUMINATED DURING RECALL AFTER ENGINE START. PACK LIGHT EXTINGUISHED W/MASTER CAUTION RESET. GROUNDED - YES. TESTED THE PACK/ZONE TEMP CONTROLLER BITE TEST PER AMM 21-61-00-700-806-002. SRADA INLET SENSOR SHOWED A FAULT BUT CLEARED DURING VERIFY. THIS IS CONSIDERED AN INTERMITTENT FAULT.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.