# SDR CALA2025081407743

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 10, 2025
- Submitted: August 14, 2025
- Operation: Air carrier
- Aircraft: [N29961](https://openairdocs.org/aircraft/N29961), registered now
- Make and model: Boeing 787-9
- Registry model: [Boeing 787-9](https://openairdocs.org/model/boeing-787-9) (OpenAirDocs)
- Aircraft serial: 37811
- Aircraft time: 45,651 hours, 4,330 cycles
- System (JASC): [2120 · Air Distribution System](https://openairdocs.org/jasc/2120)
- Part: Duct
- Condition: Disconnected
- Location: Zone 100
- Stage of operation: CL
- How discovered: O
- Nature of condition: M
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2025081407743

## Discrepancy

UNABLE TO COOL,  FLT DECK TEMP 80 TO 83, CARRIED OUT EC/RA 2125-01204. REINSTALLED INNER DUCT & LT PACK LWR RECIRC FAN CHECK VALVE INTERIM REPAIRED.  FLT DECK TEMP NORMAL.  INSPECTED LT ECS BAY, FOUND INNER RECIRC DUCT WAS DETACHED & FLAPPER OF THE LWR RECIRCULATION FAN BROKEN. CARRIED OUT EC/RA # 2125-01204 PART 1 - UNTIL INTERIM REPAIR STEP 8. THE DUCT IS IN GOOD CONDITION AND NOT DAMAGED.  REINSTALLED THE INNER DUCT & RECIRC FAN PER AMM 21-25-17-03B AND 21-52-27-00A. OPERATED THE AIR CONDITIONING PACKS AND NO LEAKS AND ABNORMAL NOISES NOTED.

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