# SDR ASAA2018051624662

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 16, 2018
- Submitted: May 17, 2018
- Operation: Air carrier
- Aircraft: [N431AS](https://openairdocs.org/aircraft/N431AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 43255
- Aircraft time: 18,226 hours, 6,029 cycles
- System (JASC): [2160 · Cabin Temperature Control System](https://openairdocs.org/jasc/2160)
- Part: Filter
- Part number: 6240181
- Condition: Clogged
- Location: Temp Sensor
- Stage of operation: NR
- How discovered: O
- Nature of condition: C, J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2018051624662

## Discrepancy

FWD CABIN ZONE TEMP LIGHT ILLUMINATED WITH RECALL, EXTINGUISHED WHEN MASTER CAUTION RESET.  ACFT GROUNDED.  RESET WITH MASTER CAUTION.  ACCOMPLISHED CABIN TEMP CONTROLLER BITE IAW FIM 21-62 TASK 801.  FOUND THE FWD SENSOR FAULT LOGGED.  FOUND ALL CABIN AND FLIGHT DECK SENSOR FILTERS BADLY CLOGGED. CLEANED THE FILTERS AND RESET THE FAULT, CABIN TEMP CONTROL OPS NORMAL.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.