# SDR UALA2012021600944

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 16, 2012
- Submitted: March 12, 2012
- Operation: Air carrier
- Aircraft: [N577UA](https://openairdocs.org/aircraft/N577UA), registered now
- Make and model: Boeing 757222
- Aircraft serial: 26693
- Aircraft time: 62,275 hours, 22,005 cycles
- Engine: Pwa PW2037
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Control Valve
- Part number: S210T130608
- Part serial: 25
- Condition: Faulty
- Location: Ac Bay
- Stage of operation: NR
- How discovered: O
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UALA2012021600944

## Discrepancy

A/C NOISE VERY LOUD EVEN WITH RT RECIRC FAN OFF WITH ALL VENTS OPEN.  CHK'D FLIGHT DECK NOISE LEVEL PER SVC TIP 21-22-00 & FOUND DB LEVEL TO MEASURE AT 79, 70.5 IS LIMIT.  CONFIRMED PACKS ARE NOT STUCK IN HI FLOW PER REF'D SVC TIP METHOD 2.  REPLACED LT PACK FLOW CONTROL & SHUTOFF VALVE IAW MM.  CHECKS GOOD IAW SERVICE TIP MM.

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