Airworthiness Directive · Amendment 39-17210 · Wings
Bombardier, Inc. Airplanes
This AD applies to Bombardier, Inc. Model DHC-8-400, -401, and -402 airplanes, certificated in any category, serial numbers 4001 through 4382 inclusive.
We are adopting a new airworthiness directive (AD) for certain Bombardier, Inc. Model DHC-8-400 series airplanes. This AD was prompted by reports of chafing between the wire harness along the wing leading edge and the inboard end rib of the wing leading edge due to insufficient clearance. This AD requires inspecting the wire harness along the leading edge for chafing damage, and repair if necessary; and relocating and installing new anchor nuts. We are issuing this AD to detect and correct chafing damage to the wire harness along the wing leading edge, which if not corrected, could lead to the loss of the airframe de-icing system, and could become a possible ignition source causing fire.
You are responsible for having the actions required by this AD performed within the compliance times specified, unless the actions have already been done.
Within 3,000 flight hours or 18 months after the effective date of this AD, whichever occurs first: Perform a detailed inspection for chafing damage of the wire harness at the leading edge, in accordance with the Accomplishment Instructions of Bombardier Service Bulletin 84-57-24, Revision A, dated August 6, 2012. If any chafing damage is found: Before further flight, repair in accordance with the Accomplishment Instructions of Bombardier Service Bulletin 84-57-24, Revision A, dated August 6, 2012.
Within 3,000 flight hours or 18 months after the effective date of this AD, whichever occurs first: Relocate and install new anchor nuts on the leading edge, in accordance with the Accomplishment Instructions of Bombardier Service Bulletin 84-57-24, Revision A, dated August 6, 2012.
