Landing Gear — Nose Landing Gear Leg Pivot Axle Cracking
- Published
- Effective
- Deadline
- Replaces
- 2023-50
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators must perform initial and repetitive detailed inspections of the NLG leg pivot axle within 25 hours air time or 30 days from 24 July 2023, and thereafter every 110 hours air time. Installation of affected parts P/N D41-3223-10-00 and D41-3223-10-00_1 is prohibited from 24 July 2023. All affected parts must be replaced with serviceable parts within 2500 hours air time or 24 months from 24 July 2023, whichever occurs first.
Summary
The Canadian Airworthiness Directive CF-2023-50R1 addresses cracking in the nose landing gear (NLG) leg pivot axle of Diamond Aircraft Industries Inc. DA 40, DA 40 D, and DA 40 F models. It mandates inspections and replacement procedures to detect and mitigate fatigue cracking in specific NLG leg part numbers D41-3223-10-00 and D41-3223-10-00_1. This directive updates previous requirements to ensure continued airworthiness and safety of affected aircraft.
What changed
CF-2023-50R1 revises the previous AD CF-2023-50 by extending the repetitive inspection interval from 100 hours to 110 hours to better align with the DA 40 Series scheduled 100 Hour Check. It maintains the inspection method using bright light and 10X magnifying glass instead of dye penetrant and clarifies compliance timelines for inspections and part replacements.
Why it matters
This directive is critical for operators and maintenance organizations to prevent nose landing gear failure caused by undetected fatigue cracking, which could lead to aircraft damage and occupant injury. It ensures consistent inspection practices and timely replacement of affected parts, supporting regulatory compliance and aircraft safety. Understanding the inspection methods and intervals helps maintenance teams avoid contamination issues and maintain inspection effectiveness.
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New ADs and bulletins for Diamond Aircraft Industries, DA 40, Aircraft Industries Inc. DA 40, Aircraft Industries Inc. DA 40 D and Aircraft Industries Inc. DA 40 F, summarized like this page, every Monday.