Airworthiness Directive · Amendment 39-19454 · Flight controls
Bombardier, Inc., Airplanes
This AD applies to Bombardier, Inc., Model BD-700-1A10 and BD-700-1A11 airplanes, certificated in any category, serial numbers 9492 through 9711 inclusive, 9713 through 9717 inclusive, 9719 through 9726 inclusive, 9728, 9730, 9732, 9733, 9743, and 9751.
We are adopting a new airworthiness directive (AD) for certain Bombardier, Inc., Model BD-700-1A10 and BD-700-1A11 airplanes. This AD was prompted by a report of cracking at the fastener holes of the left- hand-side support bracket of the elevator bell crank for the control linkage in the vertical stabilizer. This AD requires an eddy current inspection on certain support brackets of the elevator bell crank for any cracking at the fastener holes, a measurement to confirm that the fastener hole diameters are within tolerance, and replacement with a new support bracket of the elevator bell crank if necessary. We are issuing this AD to address the unsafe condition on these products.
Within 60 months after the effective date of this AD, or before accumulating 7,500 total flight cycles, whichever occurs first: Do an eddy current inspection of the support brackets of the elevator bell crank, part number (P/N) GD248-8750-3 and P/N GD248-8750-4, for any cracking at the fastener holes, and do a measurement to confirm that the fastener hole diameters are within tolerance, as applicable, in accordance with the Accomplishment Instructions of Bombardier Service Bulletin 700-27-5009, Revision 02, dated June 15, 2018 (for Model BD-700-1A11 airplanes); or Bombardier Service Bulletin 700-27-6009, Revision 01, dated July 18, 2017 (for Model BD-700-1A10 airplanes). If any cracking is found or if any fastener hole is out of tolerance, before further flight, replace with a new support bracket, in accordance with the Accomplishment Instructions of Bombardier Service Bulletin 700-27-5009, Revision 02, dated June 15, 2018 (for Model BD-700-1A11 airplanes); or Bombardier Service Bulletin 700-27-6009, Revision 01, dated July 18, 2017 (for Model BD-700-1A10 airplanes).
