Airworthiness Directive · Amendment 39-22645 · Pneumatic
Bombardier, Inc., Airplanes
This AD applies to all Bombardier, Inc., Model BD-100-1A10 airplanes, certificated in any category.
The FAA is adopting a new airworthiness directive (AD) for all Bombardier, Inc., Model BD-100-1A10 airplanes. This AD was prompted by reports from the supplier that some overheat detection sensing elements of the bleed air leak detection system were manufactured with insufficient salt fill, which can result in an inability to detect hot bleed air leaks. This AD requires revising the existing airplane flight manual (AFM) to include procedures to prevent takeoff with an active bleed air leak annunciated while on the ground. This AD also requires testing the overheat detection sensing elements, marking each serviceable sensing element with a witness mark, and replacing each nonserviceable part with a serviceable part. This AD also prohibits the installation of affected parts. The FAA is issuing this AD to address the unsafe condition on these products.
(1) For purposes of this AD, an affected part is a sensing element marked with a date code A0448 through A2104 inclusive and having an LTS/Kidde part number specified in Liebherr Service Bulletin CFD-F1958-26-01, dated May 6, 2022, unless that sensing element meets the criteria specified in either paragraph (g)(1)(i) or (ii) of this AD.
(i) The sensing element has been tested as specified in Section 3 of the Accomplishment Instructions of Kidde Aerospace and Defense Service Bulletin CFD-26-1, Revision 6, dated February 28, 2022, or earlier revisions, and has been found to be serviceable; and the sensing element has been marked on one face of its connector hex nut and packaged as specified in Section 3.C. of the Accomplishment Instructions of Kidde Aerospace and Defense Service Bulletin CFD-26-1, Revision 6, dated February 28, 2022, or earlier revisions.
(ii) The sensing element has been tested and found to be serviceable as specified in paragraph (i) of this AD; and the sensing element has been marked on one face of one connector hex nut with one green mark, as specified in Figure 11 of Bombardier Service Bulletin 100-36-10, dated December 23, 2022, or Bombardier Service Bulletin 350-36-003, dated December 23, 2022, as applicable (the figure is representative for all sensing elements).
(2) For purposes of this AD, a serviceable part is a sensing element that is not an affected part.
For airplane serial numbers 20001 through 20457 inclusive and 20501 through 20906 inclusive: Within 30 days after the effective date of this AD, revise the existing AFM to include the information specified in paragraphs (h)(1) and (2) of this AD, as applicable.
(1) For airplane serial numbers 20001 through 20457 inclusive: Section 05-42, Air Conditioning & Pressurization, Non-Normal Procedures Section, Bombardier Challenger 300 AFM (Imperial Version), Publication No. CSP 100-1, Revision 71, dated November 9, 2022.
Note 1 to Paragraph (h)(1): For obtaining the procedures for Bombardier Challenger 300 AFM (Imperial Version), Publication No. CSP 100-1, use Document Identification No. CH 300 AFM-I.
(2) For airplane serial numbers 20501 through 20906 inclusive: Section 05-42, Airconditioning & Pressurization, Non-Normal Procedures Section, Bombardier Challenger 350 AFM, Publication No. CH 350 AFM, Revision 37, dated November 9, 2022.
Note 2 to Paragraph (h)(2): For obtaining the procedures for Bombardier Challenger 350 AFM, Publication No. CH 350 AFM, use Document Identification No. CH 350 AFM.
For airplane serial numbers 20001 through 20457 inclusive and 20501 through 20906 inclusive: Within 7,500 flight cycles or 96 months, whichever occurs first, from the effective date of this AD, test the overheat detection sensing elements to determine if they are serviceable, in accordance with the Accomplishment Instructions of Bombardier Service Bulletin 100-36-10, dated December 23, 2022; or Bombardier Service Bulletin 350-36-003, dated December 23, 2022, as applicable.
(1) For each sensing element that is serviceable, before further flight, mark the sensing element with a witness mark in accordance with the Accomplishment Instructions of Bombardier Service Bulletin 100-36-10, dated December 23, 2022; or Bombardier Service Bulletin 350-36-003, dated December 23, 2022; as applicable.
(2) For each sensing element that is not serviceable, before further flight, replace the sensing element with a serviceable part in accordance with the Accomplishment Instructions of Bombardier Service Bulletin 100-36-10, dated December 23, 2022; or Bombardier Service Bulletin 350-36-003, dated December 23, 2022; as applicable.
