Airworthiness directives › 2026-07-01
AD 2026-07-01 Airworthiness Directives; Bombardier Inc. Airplanes
Applicability*9
This AD applies to all Bombardier Inc. airplanes, certificated in any category, identified in paragraphs (c)(1) through (3) of this AD. (1) Model CL-600-1A11 (600) airplanes. (2) Model CL-600-2A12 (601) airplanes. (3) Model CL-600-2B16 (601-3A, 601-3R, and 604 Variants) airplanes.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
For airplanes identified in paragraphs (g)(1) through (5) of this AD: Within 36 months or 1,400 flight hours, whichever occurs first, after the effective date of this AD, replace the nosewheel steering rudder pedal potentiometer universal coupling setscrews (self-locking setscrews) in accordance with Sections 2.B.(3) and 2.C. of the Accomplishment Instructions in the applicable service bulletin identified in paragraphs (g)(1) through (5) of this AD. (1) For Model CL-600-1A11 (600) airplanes, serial numbers 1004 through 1085 inclusive, on which the actions in Part E of Canadair Challenger Service Bulletin 600-0380, Revision 02, have been completed: Bombardier Service Bulletin 600-0782, dated October 30, 2023. Note 1 to paragraph (g)(1): This note applies to paragraphs (g)(1) and (h)(1) of this AD. These airplanes are also referred to by the marketing designation Challenger 600. (2) For Model CL-600-2A12 (601) airplanes, serial numbers 3001 through 3059 inclusive, on which the actions in Part D of Canadair Challenger Service Bulletin 601-0092, Revision 01 have been completed, and serial numbers 3060 through 3066 inclusive; and Model CL-600-2B16 (601-3A and 601-3R Variants) airplanes, serial numbers 5001 through 5194 inclusive: Bombardier Service Bulletin 601-1114, dated October 30, 2023. Note 2 to paragraph (g)(2): This note applies to paragraphs (g)(2), (h)(2), and (h)(3) of this AD. These airplanes are also referred to by the marketing designation Challenger 601. (3) For Model CL-600-2B16 (604 Variant) airplanes, serial numbers 5301 through 5665 inclusive: Bombardier Service Bulletin 604-32-033, dated October 30, 2023. Note 3 to paragraph (g)(3): This note applies to paragraphs (g)(3) and (h)(4) of this AD. These airplanes are also referred to by the marketing designation Challenger 604. (4) For Model CL-600-2B16 (604 Variant) airplanes, serial numbers 5701 through 5990 inclusive: Bombardier Service Bulletin 605-32-010, dated October 30, 2023. Note 4 to paragraph (g)(4): This note applies to paragraphs (g)(4) and (h)(5) of this AD. These airplanes are also referred to by the marketing designation Challenger 605. (5) For Model CL-600-2B16 (604 Variant) airplanes, serial numbers 6050 through 6193 inclusive: Bombardier Service Bulletin 650-32-007, dated October 30, 2023. Note 5 to paragraph (g)(5): This note applies to paragraphs (g)(5) and (h)(6) of this AD. These airplanes are also referred to by the marketing designation Challenger 650.
Unsafe condition
This AD was prompted by a report of uncommanded nose wheel steering upon landing with touchdown on the runway centerline. The FAA is issuing this AD to address uncommanded nosewheel steering due to loose nosewheel steering rudder pedal potentiometer universal coupling setscrews. The unsafe condition, if not addressed, could lead to a runway excursion.
Affected ADs
None.
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