# SDR AALA202606226865

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 21, 2026
- Submitted: June 22, 2026
- Operation: Air carrier
- Aircraft: [N315SD](https://openairdocs.org/aircraft/N315SD), registered now
- Make and model: Boeing 737-8
- Registry model: [Boeing 737-8](https://openairdocs.org/model/boeing-737-8) (OpenAirDocs)
- Aircraft serial: 44470
- Aircraft time: 17,330 hours, 6,489 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: A/C Pack
- Condition: Disengaged
- Location: Zone 100
- Stage of operation: CL
- How discovered: O
- Nature of condition: O
- Precautionary procedure: B, A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202606226865

## Discrepancy

AIRCRAFT WAS GROUNDED: WHILE IN CRUISE AT FL370 THE RIGHT PACK LIGHT FOLLOWED BY THE LEFT PACK LIGHT ILLUMINATED. RAN PACK QRH CHECKLIST AND BOTH PACKLIGHTS EXTINGUISHED. FOLLOWED BY BOTH CABIN ALTITUDE LIGHTS ILLUMINATING. RAN QRC AND QRH FOR CABIN ALTITUDE WARNING, AND CONDUCTED AN EMERGENCY DESCENT. DECESION MADE TO RETURN TO MIA EMERGENCY DECLARED AND LANDED OVERWEIGHT WITHOUT INCIDENT. MAINTENANCE TROUBLE SHOT PER FIM 21-51-00, FOUND LH AND RH PACK WAS IN FLIGHT COMMANDED OFF, MOC ALSO DETERMINED BOTH PACK WERE IN FLIGHT SELECTED OFF, AIRCRAFT RESPONDED ACCORDANLY. ACCOMPLISHED LH AND RH PACKS IBIT OPS CHECK IAW AMM 21-00-00 OPS CHECK NORMAL.

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