# SDR ASAA2019010927737

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 9, 2019
- Submitted: January 11, 2019
- Operation: Air carrier
- Aircraft: [N413AS](https://openairdocs.org/aircraft/N413AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 35205
- Aircraft time: 23,070 hours, 7,520 cycles
- System (JASC): [2163 · Cabin Temperature Sensor](https://openairdocs.org/jasc/2163)
- Part: Filter
- Part number: 412A160541
- Condition: Dirty
- Location: Temp Sensor
- Stage of operation: NR
- How discovered: O
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2019010927737

## Discrepancy

FWD AND AFT TEMP CONTROL OUTPUT VERY WARM INDICATED 22DEG REDUCE TEMP TO 8DEG FELT NORMAL TEMP DOES NOT CORRESPOND WITH INDICATION. GROUNDED - YES. ACCOMPLISHED BITE ON BOTH TEMP CONTROLLERS, NO FAULTS FOUND. FOUND BOTH FWD & AFT CABIN TEMP SENSOR FILTERS DIRTY & CLOGGED. CLEANED BOTH FILTERS REF AMM 21-61-06-100-801 OPERATED PACKS & ZONE TEMPS MATCH INDICATION IN FLIGHT DECK.

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