# SDR ASAA2020043032691

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 29, 2020
- Submitted: April 30, 2020
- Operation: Air carrier
- Aircraft: [N433AS](https://openairdocs.org/aircraft/N433AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 41704
- Aircraft time: 25,581 hours, 8,196 cycles
- System (JASC): [2163 · Cabin Temperature Sensor](https://openairdocs.org/jasc/2163)
- Part: Filter
- Condition: Dirty
- Location: Cabin 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/ASAA2020043032691

## Discrepancy

AFTER PUSHBACK WE GOT "CONT CAB" LIGHT ON RECALL. LIGHT EXTINGUISHED WHEN PUSHING MASTER CAUTION RESET. GROUNDED - YES. VERIFIED FAULT, ACCOMP PACK ZONE TEMP CONT BITE TEST, #1 CONT NO FAULTS. #2 CONT SHOWS FAULT FLT DECK TRIM VALVE. CLEARED FAULT, REACCOMP BITE TEST NOW NO FAULTS ON #2 CONT. CLEANED ALL THREE TEMP SENSOR FILTERS. ACCOMP CABIN TEMP CONT & IND. OPS TEST, TEST PASS. RAN PACKS FOR 45 MIN NO FAULTS. REF B737-900 AMM 21-61-00-7000-806-200, 21-61-00-700-807-002, & AMM 21-61-06-400-801 & 21-00-00-800-803.

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