# SDR AALA202610088522

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 7, 2026
- Submitted: October 8, 2026
- Operation: Air carrier
- Aircraft: [N886NN](https://openairdocs.org/aircraft/N886NN), registered now
- Make and model: Boeing 737823
- Aircraft serial: 33223
- Aircraft time: 42,873 hours, 18,529 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Control Valve
- Part number: 3989086
- Part serial: 12384
- Condition: Inoperative
- Location: Zone 100
- Stage of operation: CL
- How discovered: O
- Nature of condition: B
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202610088522

## Discrepancy

AIRCRAFT WAS GROUNDED:  STARTED TO SMELL ODOR LIKE OIL IN BLEED SYSTEM.  LEFT PACK LIGHT ILLUMINED.  RAN QRH.  LIGHT WENT OFF WITH TRIP RESET.  ABOUT A MINUTE LATER PACK LIGHT ILLUMINATED AGAIN.  SHUT DOWN PACK IAW QRH. REMOVED AND REPLACED THE LEFT PACK TCV IAW AMM 21-51-10.

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