# SDR ASAA2018011623191

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 16, 2018
- Submitted: January 18, 2018
- Operation: Air carrier
- Aircraft: [N493AS](https://openairdocs.org/aircraft/N493AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 41727
- Aircraft time: 6,817 hours, 2,297 cycles
- System (JASC): [2160 · Cabin Temperature Control System](https://openairdocs.org/jasc/2160)
- Part: Filter
- Condition: Dirty
- Location: Temp Sensor
- Stage of operation: NR
- How discovered: 9
- Nature of condition: N
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2018011623191

## Discrepancy

COCKPIT TEMP ERRATIC.  KNOB POSITION AND DUCT TEMP DO NOT CORRELATE.  DURING CRUISE WITH OAT -54C.  ACFT GROUNDED.  IAW AMM 21-61-00-700-807-002, CABIN TEMP CONTROL & INDICATION OPS TESTED. COULD NOT DUPLICATE.  OPS TESTED NORMAL. CLEANED FLT DECK TEMP SENSOR FILTER IAW  AMM 21-61-06. NO HISTORY 30 DAYS.

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