# SDR ASAA2016031215862

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 12, 2016
- Submitted: March 14, 2016
- Operation: Air carrier
- Aircraft: [N491AS](https://openairdocs.org/aircraft/N491AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 44109
- Aircraft time: 1,032 hours, 353 cycles
- System (JASC): [2160 · Cabin Temperature Control System](https://openairdocs.org/jasc/2160)
- Part: Sensor
- Part number: 412A160541
- Condition: Dirty
- Location: Cabin Temp
- Stage of operation: CR
- How discovered: O
- Nature of condition: M
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2016031215862

## Discrepancy

AIR CONDITIONING VERY HOT IN ROWS 6-12, FWD CABIN TEMP CONTROL HAD LITTLE EFFECT. FIRST CLASS AND BACK OF AIRCRAFT COLD. GROUNDED - YES. PERFORMED PACK ZONE TEMP CONTROLLER BITE NR 1 AND NR 2, NO FAULTS FOUND, REF FIM 21-62, TASK 801. PERFORMED CABIN TEMP CONTROLLER INDICATION AND CONTINUITY OPS TEST, REF AMM 21-61-00.  FWD CABIN & FLIGHT DECK DIFFICULT TO CONTROL, RUNS HOT.  FOUND FWD CABIN & FLIGHT DECK TEMP SENSOR FILTERS VERY DIRTY.  CLEANED TEMP SENSORS & FILTERS REF AMM 21-61-06. CABIN TEMP CONTROL OPS CHECKS GOOD FOR ALL ZONES AFTER FILTER CLEANING. NO BITE FAULTS.

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