# SDR ASAA2017092722064

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 27, 2017
- Submitted: September 29, 2017
- Operation: Air carrier
- Aircraft: [N423AS](https://openairdocs.org/aircraft/N423AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 35206
- Aircraft time: 17,709 hours, 5,844 cycles
- System (JASC): [2160 · Cabin Temperature Control System](https://openairdocs.org/jasc/2160)
- Part: Filter
- Part number: 412A160041
- Condition: Obstructed
- Location: Temp Sensor
- Stage of operation: NR
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2017092722064

## Discrepancy

F/A REPORTED AN EXCESSIVELY HOT TEMPERATURE AT ROWS 6 - 12.  TRIM AIR TURNED OFF IAW QRH.  ACFT GROUNDED.  RETURNED TRIM AIR SWITCH TO ON.   BITE CHECKED BOTH ZONE TEMP CONTROLLERS IAW FIM 21-61, TASK 801, NO FAULTS. FOUND FWD ZONE FAN FILTER COMPLETELY BLOCKED. CLEANED IAW AMM 21-61-06.  RAN BOTH PACKS WITH TEMP SELECTOR FULL COLD, COLD AIR COMING FROM ALL PSU'S. OPS NORMAL IAW AMM 21-61-00.

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