# SDR ASAA2013110396289

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 3, 2013
- Submitted: November 5, 2013
- Operation: Air carrier
- Aircraft: [N431AS](https://openairdocs.org/aircraft/N431AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 43255
- Aircraft time: 135 hours, 49 cycles
- System (JASC): [2160 · Cabin Temperature Control System](https://openairdocs.org/jasc/2160)
- Part: Filter
- Part number: 412A160541
- Condition: Dirty
- Location: Pax Cabin
- Stage of operation: NR
- How discovered: O
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2013110396289

## Discrepancy

TEMPERATURE WAS IMPOSSIBLE TO CONTROL.  MANY COMPLAINTS BY F/AS AND PAX.  ACFT GROUNDED.  PERFORMED BITE CK ON BOTH TEMP CONT, BOTH CK OK ALL GOS.  OPERATED BOTH PACKS, FOUND FWD & AFT CABIN TAKES MUCH LONGER TO GET TO TEMP & CONT CAB CK OK. FOUND BOTH CABIN TEMP SENSOR FILTERS VERY DIRTY.  CLEANED BOTH CABIN TEMP SENSORS FILTERS & ACCOP CABIN TEMP CONT OPS TEST, ALL TEST NORMAL, REF MM21-61-00 & 21-61-06.  NO HISTORY 30 DAYS.

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