Airworthiness Directive · Amendment 39-16979 · Engine controls
Bombardier, Inc.
This AD applies to Bombardier, Inc. Model DHC-8-102, -103, and -106 airplanes, certificated in any category, serial numbers 003 through 039 inclusive.
We are adopting a new airworthiness directive (AD) for certain Bombardier, Inc. Model DHC-8-102, -103, and -106 airplanes. This AD requires a general visual inspection for chamfer of the upper edge of each leaf spring, and rework if necessary. This AD also requires installing a new friction brake nut. This AD was prompted by reports that it was possible to inadvertently move the power levers through the flight idle gate into the beta range due to an un-chamfered leaf spring in the friction brake that may contact the power lever latch when the friction adjusting knob is fully loosened. We are issuing this AD to detect and correct an unsafe condition where both engines can inadvertently be operated in beta mode during flight and consequently reduce controllability of the airplane.
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 50 flight hours or 10 days, whichever occurs first, after the effective date of this AD, do the actions specified in paragraphs (g)(1) and (g)(2) of this AD.
(1) Do a general visual inspection of the upper edge of each leaf spring for chamfer, in accordance with the Accomplishment Instructions of Bombardier Alert Service Bulletin A8-76-32, dated January 27, 2012. Do all applicable rework before further flight, in accordance with the Accomplishment Instructions of Bombardier Alert Service Bulletin A8-76-32, dated January 27, 2012.
(2) Install a new friction brake nut, in accordance with the Accomplishment Instructions of Bombardier Service Bulletin 8-76-02, Revision `A,' dated January 25, 2012.
The aircraft, engines and makers this AD names, by the model designations in its text. A model listed here may still be outside the AD's serial ranges.
Appliances and equipment
