# SDR AALA202607085200

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 6, 2026
- Submitted: July 9, 2026
- Operation: Air carrier
- Aircraft: [N310RF](https://openairdocs.org/aircraft/N310RF), registered now
- Make and model: Boeing 737-8
- Registry model: [Boeing 737-8](https://openairdocs.org/model/boeing-737-8) (OpenAirDocs)
- Aircraft serial: 44451
- Aircraft time: 19,794 hours, 7,484 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Heat Exchanger
- Part number: 1828204
- Condition: Dirty
- Location: Zone 100
- Stage of operation: CL
- How discovered: O
- Nature of condition: J
- Precautionary procedure: B, A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202607085200

## Discrepancy

AIRCRAFT WAS GROUNDED: AFTER TAKEOFF FROM DFW, BOTH PACKS FAILED AFTER REACHING 32,000 FEET. CREW ACCOMPLISHED AN EMERGENCY DESCENT AND THE CABIN ALTITUDE REACHED A MAX OF 13,000 FEET. THE CREW ELECTED TO RETURN TO DFW. EMERGENCY DECLARED AND AIRCRAFT LANDED OVERWEIGHT WITHOUT INCIDENT.  MAINTENANCE FOUND HEAT EXCHANGES CLOGGED AND DIRTY ACCOMPLISHED WASHING OF BOTH PACK HEAT EXCHANGERS IAW EA376934 UP TO STEP 9.

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