airworthiness · Rule · Final rule; request for comments. · Published 2012-03-20 · Effective 2012-04-04 · 77 FR 16145
Document
Document number
2012-6439
Federal Register citation
77 FR 16145
Type
Rule
Action
Final rule; request for comments.
Category
airworthiness
Publication date
2012-03-20
Effective date
2012-04-04
FAA docket
Docket No. FAA-2012-0190
Abstract
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.