Airworthiness Directive · Amendment 39-22819 · Ice and rain protection
Bombardier, Inc., Airplanes
This AD applies to Bombardier, Inc., Model BD-100-1A10 airplanes, certificated in any category, serial numbers 20003 through 20936 inclusive.
The FAA is adopting a new airworthiness directive (AD) for certain Bombardier, Inc., Model BD-100-1A10 airplanes. This AD was prompted by the discovery of a single-point failure within the left- hand and right-hand heater current monitor (HCM) units. This AD requires installing a monitor circuit comprising relays external to the HCM units. This AD also requires revising the normal and non-normal procedure sections of the existing airplane flight manual (AFM) to add new procedures associated with revised crew alerting system (CAS) messages. The FAA is issuing this AD to address the unsafe condition on these products.
Within 60 months from the effective date of this AD, install a monitoring circuit comprising of relays external to the HCM units, in accordance with sections 2.B. and 2.C. of the Accomplishment Instructions of the applicable material specified in paragraph (g)(1) or (2) of this AD.
(1) Bombardier Service Bulletin 100-30-06, dated December 29, 2022 (for airplane serial numbers 20003 through 20500 inclusive).
(2) Bombardier Service Bulletin 350-30-001, dated December 29, 2022 (for airplane serial numbers 20501 through 20936 inclusive).
Within 60 months from the effective date of this AD, and after the completion of the actions required by paragraph (g) of this AD, revise the existing AFM as specified in paragraphs (h)(1) through (4) of this AD, as applicable.
(1) For airplane serial numbers 20003 through 20500 inclusive: Revise Chapter 4, Normal Procedures, to include the information in BEFORE STARTING ENGINES section, Subsection 04-02, Chapter 4, Normal Procedures, Bombardier Challenger 300 AFM (Imperial Version), Publication No. CSP 100-1, Revision 72, dated May 11, 2023.
Note 1 to paragraph (h)(1): For obtaining the procedures specified in paragraphs (h)(1) and (2) of this AD 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 20003 through 20500 inclusive: Revise Chapter 5, Non-Normal Procedures, to include the information in Subsection 05-27, Ice & Rain Protection, Chapter 5, Non-Normal Procedures, Bombardier Challenger 300 AFM (Imperial Version), Publication No. CSP 100-1, Revision 72, dated May 11, 2023.
(3) For airplane serial numbers 20501 through 20936 inclusive: Revise Chapter 4, Normal Procedures, to include the information in BEFORE STARTING ENGINES section, Subsection 04-02, Chapter 4, Normal Procedures, Bombardier Challenger 350 AFM, Publication No. CH 350 AFM, Revision 38, dated May 11, 2023.
Note 2 to paragraph (h)(3): For obtaining the procedures specified in paragraphs (h)(3) and (4) of this AD for Bombardier Challenger 350 AFM, Publication No. CH 350 AFM, use Document Identification No. CH 350 AFM.
(4) For airplane serial numbers 20501 through 20936 inclusive: Revise Chapter 5, Non-Normal Procedures, to include the information in Subsection 05-27, Ice & Rain Protection, Chapter 5, Non-Normal Procedures, Bombardier Challenger 350 AFM, Publication No. CH 350 AFM, Revision 38, dated May 11, 2023.
The following provisions also apply to this AD:
(1) Alternative Methods of Compliance (AMOCs): The Manager, International Validation Branch, FAA, has the authority to approve AMOCs for this AD, if requested using the procedures found in 14 CFR 39.19. In accordance with 14 CFR 39.19, send your request to your principal inspector or responsible Flight Standards Office, as appropriate. If sending information directly to the manager of the International Validation Branch, mail it to the address identified in paragraph (j) of this AD. Information may be emailed to: 9-AVS-NYACO-COS@faa.gov. Before using any approved AMOC, notify your appropriate principal inspector, or lacking a principal inspector, the manager of the responsible Flight Standards Office.
(2) Contacting the Manufacturer: For any requirement in this AD to obtain instructions from a manufacturer, the instructions must be accomplished using a method approved by the Manager, International Validation Branch, FAA; or Transport Canada; or Bombardier, Inc.'s Transport Canada Design Approval Organization (DAO). If approved by the DAO, the approval must include the DAO-authorized signature.
For more information about this AD, contact Steven Dzierzynski, Aviation Safety Engineer, FAA, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590; telephone 516-228-7300; email 9-avs-nyaco-cos@faa.gov.
