EASA AD CF-2022-12
Landing Gear — Lubrication of Main Landing Gear
Summary
Canadian Airworthiness Directive CF-2022-12 mandates repetitive lubrication of the main landing gear (MLG) on De Havilland Aircraft of Canada Limited DHC-8-401 and -402 aeroplanes, serial numbers 4001, 4003, and subsequent. This directive addresses issues with MLG lock actuator assemblies that may fail due to grease degradation over time. The directive ensures continued safe operation by requiring maintenance actions in accordance with De Havilland Service Bulletin 84-32-168.
What Changed
CF-2022-12 introduces a mandatory repetitive lubrication requirement for the main landing gear assembly on specified DHC-8 models. It specifies compliance with the procedures outlined in the latest revision of De Havilland Service Bulletin 84-32-168 and sets intervals for lubrication every 500 flight hours or 3 months, whichever occurs first. This is a new regulation aimed at preventing landing gear lock failures.
Why It Matters
This directive is critical for operators and maintenance organizations to prevent main landing gear lock failures that could compromise aircraft safety during landing. It highlights the importance of adhering to calendar-based lubrication intervals in addition to flight hour-based maintenance. Compliance ensures reliability of the landing gear mechanism and avoids potential operational disruptions or safety incidents.
What To Do
Operators of affected DHC-8-401 and -402 aircraft must lubricate the main landing gear assembly within 500 flight hours or 3 months from April 4, 2022, whichever occurs first, following the procedures in De Havilland SB 84-32-168 Revision A or later approved revisions. Subsequent lubrication must continue at the same intervals to maintain compliance. Maintenance teams should update their schedules and records accordingly.
Your fleet's weekly compliance brief
AI-summarized regulatory changes, compliance deadlines, and action items — filtered to your aircraft, every Monday.
AI-generated summary from official EASA source document. Always verify against the original.