# SDR UALA2013011100198

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 10, 2013
- Submitted: February 1, 2013
- Operation: Air carrier
- Aircraft: [N117UA](https://openairdocs.org/aircraft/N117UA), registered now
- Make and model: Boeing 747422
- Aircraft serial: 28810
- Aircraft time: 57,189 hours, 6,843 cycles
- Engine: Pwa PW4056
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Sensor
- Part number: 9486922
- Part serial: 326
- Condition: Failed
- Location: Mass Air Flow
- Stage of operation: CR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UALA2013011100198

## Discrepancy

NR 2 PACK FLOW PROBLEMS, RTFL. REPLACED MASS AIR FLOW SENSOR.

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