# SDR CALA2026061617126

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 14, 2026
- Submitted: June 17, 2026
- Operation: Air carrier
- Aircraft: [N26970](https://openairdocs.org/aircraft/N26970), registered now
- Make and model: Boeing 787-9
- Registry model: [Boeing 787-9](https://openairdocs.org/model/boeing-787-9) (OpenAirDocs)
- Aircraft serial: 60146
- Aircraft time: 41,899 hours, 3,962 cycles
- System (JASC): [2100 · Air Conditioning System](https://openairdocs.org/jasc/2100)
- Part: Bpcu
- Part number: 7000051H03
- Part serial: 954
- Condition: Faulted
- Location: R Bpcu Sta 327.5
- Part time: 42,077 hours, 4,092 cycles
- Stage of operation: CL
- How discovered: O
- Nature of condition: B
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2026061617126

## Discrepancy

CREW RETURNED TO THE FIELD FOR A STRONG ELECTRICAL ODOR COMING FROM THE VENTS LOCATED FROM BACK OF FIRST CLASS TO MIDDLE OF THE ACFT.     NO ELECTRICAL SMELLS NOTED THROUGHOUT AIRCRAFT. RAN APU WITH PACKS ON & ALL RECIRC FANS OPERATING. NO LOAD SHED OF LAV/GALLEY FANS OR CARGO FWD EXHAUST FAN.   FOLLOWED THE FIM DMC B787-A21-20-F5-72A-421A-A TO ITS ENTIRELY ,CHECK CABINS ,GALLEYS & LAVS, ALSO INSIDE THE CREW REST AREA , NO ODOR NOTED.  LAVATORY/GALLEY FAN 1 THE LAV/GALLEY VENT FAN 1 FAILURE. OR LAV/GALLEY VENT FAN 1 FAILURE. THIS MESSAGE WILL BE INHIBITED BY A FAILURE OF RDC 7 UN LESS THE MESSAGE IS ACTIVE BEFORE RDC 7 FAILS. DB 24 BPCU GATEWAY OPS (RIGHT) DB 24 BPCU GATEWAY OPS (LEFT) UNIT, BUS POWER OFF 78-2422-9-0002 0954 ON 0000 UNIT, BUS POWER OFF 78-2422-9-0002 0954 ON 78-2422-9-0002 2548 FOUND MX MSG 24-19317 & 24-19351 IN PRESENT LEG FAULTS. BPCU OPS SHED GROUP 17 & 51 LOADS. REF FIM 24-40-F1-N4A-421A-A & 24-40-F1-R8A-421A-A NO MX ACTION NECESSARY. ALSO NOTED HISTORY OF MX MSG 24-12752. REF FIM 24-20-F8-56A-421A-A. REPLACED RT BPCU

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