Airworthiness Directive · Amendment 39-15172 · Landing gear
Airbus Model A321 Series Airplanes
This AD applies to Airbus Model A321 series airplanes; all certified models; certificated in any category; equipped with Messier-Goodrich S.A. or Goodrich-Messier Inc., main landing gear (MLG) wheel assemblies having part number (P/N) C20500000 or P/N C20452000.
We are adopting a new airworthiness directive (AD) for the products listed above. This AD results from mandatory continuing airworthiness information (MCAI) originated by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as:
Unless already done, do the following actions.
(1) At the next scheduled tire change, but no later than 6 months after the effective date of this AD: Inspect the MLG wheel assembly for discrepancies (corrosion, damage, cracks, and loose or missing heat shield spacers) in accordance with the instructions of Messier-Bugatti Special Inspection Service Bulletin C20452-32-3254, Revision 2, dated September 5, 2006. Repeat the inspection thereafter at intervals not to exceed every tire change or 6 months, whichever is earlier.
(2) If any discrepancy is found: Before further flight, repair the MLG wheel assembly in accordance with the instructions of Messier-Bugatti Special Inspection Service Bulletin C20452-32-3254, Revision 2, dated September 5, 2006.
Note: This AD differs from the MCAI and/or service information as follows: The MCAI specifies an imprecise compliance time for inspecting the MLG wheel assembly—i.e., “at each tire change.” This AD requires inspecting the MLG wheel assembly at the next scheduled tire change, but no later than 6 months after the effective date of the AD; and thereafter at intervals not to exceed every tire change or 6 months, whichever is earlier.
