# Incident 20260909013389I: Bombardier Inc CL-600-2B19, September 9, 2026

- Type: FAA incident report (Accident/Incident Data System), as reported
- Date: September 9, 2026, 12:00 local time
- Damage: No damage
- Phase of flight: Takeoff: Climb Out
- Operating rules: Air carrier (Part 121)
- Operator: A6WA
- Aircraft: N435AW, registered now (https://openairdocs.org/aircraft/N435AW) (OpenAirDocs)
- Registry model: Bombardier CL-600-2B19 (registry code 1390008, https://openairdocs.org/model/bombardier-cl-600-2b19) (OpenAirDocs)
- Registry engine: GE CF34 series (registry code 30015, https://openairdocs.org/engine/ge-cf34-series) (OpenAirDocs)
- Reported make and model: BOMBARDIER INC CL-600-2B19
- Reported engine: GE CF34 SERIES
- People aboard: 0
- Fatal injuries: 0
- Other injuries: 0
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/20260909013389I

## Narrative

As the FAA filed it, in capitals; the FAA replaces private details with ^PRIVACY DATA OMITTED^.

THE CRJ200 FERRY FLIGHT EN-ROUTE FROM SAULT STE. MARIE, ONTARIO, CANADA (YAM) TO APPLETON, WI (ATW) WAS NOTIFIED BY AIR TRAFFIC CONTROL (ATC) THAT THERE WAS A WHITE MIST COMING FROM THE RIGHT-WING DURING TAKEOFF. THE CREW DECLARED AN EMERGENCY AND BEGAN TO RETURN TO YAM.

THEY NOTICED A FUEL IMBALANCE BEGINNING SO ENGAGED THE AUTO-CROSSFLOW, WHICH RELATIVELY BALANCED THE WINGS. ON TAXI-IN, FIRE DEPARTMENT NOTED A FEW DROPS OF FUEL COMING FROM THE RIGHT WING WHEN TAXIING FORWARD AND MAKING RIGHT TURNS. WHEN MAKING LEFT TURNS, FUEL LEAK INCREASED. UPON PARKING AT THE HANGAR, THE WING WAS DRIPPING SLOWLY, AND THE WING WAS WET UNDERNEATH.

THE AIRCRAFT HAD BEEN RELEASED FROM HEAVY CHECK ON THE DAY OF THIS INCIDENT. THERE WERE NO RELATED MEL’S.

AD 2022-18-15 REQUIRED REPLACEMENT OF THE WIGGINS COUPLING CLAM SHELLS. THIS AD WAS ACCOMPLISHED ON 09/08/2026.

INVESTIGATION SHOWED THE O-RINGS EXHIBITED PHYSICAL DAMAGE CONSISTENT WITH BEING CUT OR PINCHED DURING INSTALLATION.

BASED ON THE CONDITION OF THE O-RINGS AND REVIEW OF THE INSTALLATION, THE INVESTIGATION DETERMINED THAT UNINTENDED TORSIONAL LOADING WAS APPLIED TO ONE SIDE OF THE WIGGINS FITTINGS DURING ASSEMBLY. THIS LOADING RESULTED IN DAMAGE TO THE O-RINGS AND SUBSEQUENTLY COMPROMISED THE SEALING INTEGRITY OF THE COUPLINGS.

From the FAA Accident/Incident Data System. Reports are matched to registry aircraft by N-number and event date, checked against the reported make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. For accidents, the NTSB's own investigation is the fuller record.

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