# SDR ASAA2018122867590

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 26, 2018
- Submitted: December 29, 2018
- Operation: Air carrier
- Aircraft: [N433AS](https://openairdocs.org/aircraft/N433AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 41704
- Aircraft time: 20,556 hours, 6,737 cycles
- System (JASC): [2160 · Cabin Temperature Control System](https://openairdocs.org/jasc/2160)
- Part: Duct
- Condition: Closed
- Location: Cabin Air
- Stage of operation: CL
- How discovered: O
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2018122867590

## Discrepancy

AFTER TAKEOFF THE "FWD CAB" ZONE TEMP LIGHT ILLUMINATED. AFTER RUNNING THE QRH, THE ZONE TEMP DID NOT GO OUT. THE FORWARD CABIN'S TEMP IS O/K AS PER THE FLIGHT ATTENDANT. GROUNDED - YES. CHECKED AND RELEASED PER MEL 21-1G, ONE PACK INOP RIGHT HAND, COMPLIED WITH PROCEDURES (MTX) PER B737-900 AMM 21-00-00-040-085. FWD CARGO HEAT DUCT CLOSED POSITION, RIGHT AIRFLOW SHUTOFF VALVE CLOSED. CONFIGURATION CHANGES HAVE BEEN C/W. COMPLETED R/H PACK DEACTIVATION BY CLOSING C/B P6-4 C-5. FWD PACK ZONE LIGHT EXTINGUISHED. DEFECT CLEARED.

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