Airworthiness Directive · Amendment 39-22824 · Nacelles/pylons
Bombardier, Inc., Airplanes
This AD applies to Bombardier, Inc., Model BD-100-1A10 airplanes, certificated in any category, having serial numbers (S/Ns) 20002 through 20912 inclusive.
The FAA is adopting a new airworthiness directive (AD) for certain Bombardier, Inc., Model BD-100-1A10 airplanes. This AD was prompted by a determination that a revised restrictive airworthiness limitation is necessary. This AD requires revising the existing maintenance or inspection program, as applicable, to incorporate a revised restrictive airworthiness limitation for the aft engine mount attachment bolts. The FAA is issuing this AD to address the unsafe condition on these products.
Within 60 days after the effective date of this AD, revise the existing maintenance or inspection program, as applicable, to incorporate the information specified in paragraphs (g)(1) and (2) of this AD, as applicable. The initial compliance time for doing the tasks is at the time specified in the applicable time limit/maintenance check (TLMC) document specified in paragraphs (g)(1) and (2) of this AD, or within 60 days after the effective date of this AD, whichever occurs later.
(1) For airplane S/Ns 20002 through 20500 inclusive: Task 54-51-00-111* “Discard of the Aft Engine Mount Bolts, Part No. MS21250-07, Non-Serialized,” Section 5-10-10 “Life Limits (Structures),” Part 2, “Airworthiness Limitations,” of the Bombardier Challenger 300 Time Limits/Maintenance Check, Publication No. CH 300 TLMC, Revision 24, dated August 9, 2023.
(2) For airplane S/Ns 20501 through 20912 inclusive: Task 54-51-00-111* “Discard of the Aft Engine Mount Bolts, Part No. MS21250-07, Non-Serialized,” Section 5-10-10 “Life Limits (Structures),” Part 2 “Airworthiness Limitations,” of the Bombardier Challenger 350 Time Limits/Maintenance Check, Publication No. CH 350 TLMC, Revision 14, dated August 9, 2023.
Note 1 to paragraph (g): The asterisk (or “one star”) with the last three digits of the task numbers listed in paragraphs (g)(1) and (2) of this AD indicates that the task is an airworthiness limitation task.
After the existing maintenance or inspection program has been revised as required by paragraph (g) of this AD, no alternative actions (e.g., inspections) or intervals may be used unless the actions or intervals, are approved as an alternative method of compliance in accordance with the procedures specified in paragraph (i)(1) of this AD.
