# SDR CALA2013082390704

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 22, 2013
- Submitted: August 23, 2013
- Operation: Air carrier
- Aircraft: [N121UA](https://openairdocs.org/aircraft/N121UA), registered now
- Make and model: Boeing 747422
- Aircraft serial: 29167
- Aircraft time: 59,518 hours, 6,917 cycles
- Engine: Pwa PW4056
- System (JASC): [2140 · Heating System](https://openairdocs.org/jasc/2140)
- Part: Sensor
- Condition: Dirty
- Location: Cabin Temp
- Stage of operation: NR
- How discovered: 9
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2013082390704

## Discrepancy

CABIN TEMP CONTROL ISSUES LV2 CLEANED TEMP SENSORS, AND CHECKED FANS FOR AIRFLOW.

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