Airworthiness Directive · Amendment 39-18960 · Fuselage
Bombardier, Inc., Airplanes
This AD applies to Bombardier, Inc., Model BD-100-1A10 airplanes, certificated in any category, serial numbers 20001 through 20433 inclusive.
We are adopting a new airworthiness directive (AD) for certain Bombardier, Inc., Model BD-100-1A10 airplanes. This AD requires removing the fasteners attaching the machined center fitting to the rear spar frame lower flange splice, inspecting the fasteners and fastener holes for damage, reworking and repairing the fastener holes, as applicable, and replacing the fasteners. This AD was prompted by a report indicating that certain fasteners attaching the machined rear spar center fitting to the frame were installed with a gap between the fastener head and the structure, or were installed tilted. We are issuing this AD to address the unsafe condition on these products.
Before the accumulation of 7,500 total flight cycles, or within 10 days after the effective date of this AD, whichever occurs later, do the actions required by paragraphs (g)(1) through (g)(4) of this AD, in accordance with the Accomplishment Instructions of Bombardier Service Bulletin 100-53-32, dated February 16, 2017.
(1) Remove the fasteners attaching the machined center fitting (part number 1005340715), wing-to-fuselage attachment and splice fitting at fuselage station 587, to the rear spar frame lower flange splice.
(2) Do a general visual inspection of the fasteners for damage and an eddy current inspection of the fastener holes for damage.
(3) Rework the fastener holes as applicable.
(4) Replace the fasteners with self-aligning fasteners and self-aligning collars.
If any damage of any fastener hole is found during any inspection required by paragraph (g)(2) of this AD, before further flight, repair using a method approved by the Manager, New York Aircraft Certification Office (ACO), ANE-170, FAA; or Transport Canada Civil Aviation (TCCA); or Bombardier, Inc.'s TCCA Design Approval Organization (DAO).
Submit a report of the findings of the inspections required by paragraph (g)(2) of this AD, as specified in Appendix 1 of Bombardier Service Bulletin 100-53-32, dated February 16, 2017, to bbad_challenger_stress@aero.bombardier.com, at the applicable time specified in paragraph (i)(1) or (i)(2) of this AD.
(1) If the inspection was done on or after the effective date of this AD: Submit the report within 10 days after the inspection.
(2) If the inspection was done before the effective date of this AD: Submit the report within 10 days after the effective date of this AD.
