# SDR ASAA12511488

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 30, 2012
- Submitted: May 2, 2012
- Operation: Air carrier
- Aircraft: [N535AS](https://openairdocs.org/aircraft/N535AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35200
- Aircraft time: 4,869 hours, 1,478 cycles
- Engine: Cfmint CFM567B27
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Control Valve
- Part number: 3989083
- Part serial: 2842
- Condition: Malfunctioned
- Location: Lt A/C Pack
- Part time: 43,787 hours, 23,986 cycles
- Stage of operation: IN
- How discovered: O
- Nature of condition: J
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA12511488

## Discrepancy

FOLLOW UP TO RT PACK LT ILLUMINATING CAUSING FLIGHT DELAYS.  ACFT GROUNDED. REPLACED RT TCV, REF MM 21 51 10.  INSTALLATION/GROUND VERIFICATION TEST NORMAL IAW SAME.

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