# SDR AALA202607290706

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 28, 2026
- Submitted: July 30, 2026
- Operation: Air carrier
- Aircraft: [N980NN](https://openairdocs.org/aircraft/N980NN), registered now
- Make and model: Boeing 737823
- Aircraft serial: 31229
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Valve
- Part number: 3989086
- Part serial: 18185
- Condition: Inoperative
- Location: Zone 100
- Part time: 16,689 hours, 7,633 cycles
- Stage of operation: CL
- How discovered: V
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202607290706

## Discrepancy

AIRCRAFT WAS GROUNDED:  LEFT PACK LIGHT ILLUMINATED WHILE CLIMBING THROUGH FL280. PACK LIGHT REMAINED ILLUMINATED FOLLOWING PACK TRIP DECESION MADE TO DIVERT TO DFW, AIRCRAFT LANNDED WITHOUT INCIDENT. MAINTENANCE REPLACED STANDBY TVC IAW AMM 21-51-11.

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