Powerplant — Engine Mount — Bushing Missing

Published: Feb 17, 2021
Effective: Mar 1, 2021
Deadline: Jun 1, 2022

Bombardier BD-700 1A10 1A11

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

What to do

Operators of Bombardier BD-700-1A10 and BD-700-1A11 aircraft must inspect the forward and aft engine mounts within 15 months or 750 flight hours from March 1, 2021, whichever occurs first. Inspections must follow the instructions in the specified Bombardier service bulletins. If issues are found, operators must contact Bombardier for an approved corrective action referencing this directive.

Summary

Canadian Airworthiness Directive CF-2021-04 addresses the issue of missing sliding bushings in the engine mount system of Bombardier Inc. BD-700-1A10 and BD-700-1A11 aircraft. This directive mandates inspections of the forward and aft engine mounts to ensure proper installation of the bushings, which are critical for carrying engine loads to the airframe. The directive applies to specific serial numbers of these aircraft models.

What changed

CF-2021-04 introduces a new mandatory inspection requirement for the forward and aft engine mounts on affected Bombardier BD-700-1A10 and BD-700-1A11 aircraft. It requires verification of sliding bushing installation according to Bombardier service bulletins and mandates contacting Bombardier for approved corrective actions if discrepancies are found.

Why it matters

This directive is important because missing sliding bushings can cause improper load distribution and increased stress on engine mount components, potentially leading to structural failure and loss of engine attachment. Compliance ensures continued airworthiness and safety of the affected aircraft, protecting operators and maintenance organizations from critical failures.

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