Airworthiness DirectiveEASA AD CF-2018-19

Special Check of Attachment Fittings — Wing Box Main Landing Gear Side Brace Fittings

Published: Jul 25, 2018
Effective: Aug 3, 2018
Deadline: Aug 3, 2018

AI-generated summary of the official EASA document. Verify against the PDF before acting.

What to do

Operators must inspect the main landing gear side brace fittings within 400 flight cycles or 12 months from August 3, 2018, to verify the shaft part number and check for damage. If an incorrect shaft is installed, it must be replaced with the correct part and the anti-rotation bracket installed promptly. If the correct shaft is installed, the anti-rotation bracket must be installed within six months. Detailed inspections and replacements must be performed according to Bombardier Service Bulletin 601-0624, Revision 02 or later approved revisions.

Summary

The Canadian Airworthiness Directive CF-2018-19 mandates a special inspection and corrective actions for Bombardier Inc. CL-600-2A12 aircraft, serial numbers 3001 through 3009 and 3011 through 3029. It addresses potential damage to the main landing gear side brace fittings caused by incorrect installation of the side brace shaft part number. The directive requires verification of the shaft part number and inspection for damage to prevent landing gear collapse and subsequent structural damage.

What changed

This new Airworthiness Directive introduces mandatory inspections to identify the installed side brace shaft part number and detailed visual inspections for damage. It requires replacement of incorrect shafts with the correct part number and installation of an anti-rotation bracket to prevent future incorrect installations. The directive also specifies timelines for inspections and modifications based on the shaft part number found.

Why it matters

This directive is critical for operators and maintenance organizations to ensure the structural integrity of the main landing gear on affected Bombardier Challenger aircraft. Compliance prevents potential landing gear collapse, which could cause significant structural damage and compromise flight safety. It also clarifies acceptable service bulletin revisions and compliance conditions, aiding maintenance planning and regulatory adherence.

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