Airworthiness Directives; Bombardier, Inc. Airplanes
airworthiness · Rule · Final rule. · Published 2014-08-27 · Effective 2014-10-01 · 79 FR 51080
Document
Document number
2014-19976
Federal Register citation
79 FR 51080
Type
Rule
Action
Final rule.
Category
airworthiness
Publication date
2014-08-27
Effective date
2014-10-01
FAA docket
Docket No. FAA-2014-0175
Abstract
We are adopting a new airworthiness directive (AD) for certain Bombardier, Inc. Model CL-600-2B19 (Regional Jet Series 100 & 440) airplanes. This AD was prompted by reports that elevator power control unit (PCU) shear pins may fail prematurely. This AD requires repetitive replacement of the elevator PCU shear pins. We are issuing this AD to prevent premature elevator PCU shear pin failure. If all pins fail on one elevator, the elevator surface would become inoperative, which could reduce the controllability of the airplane and could result in a loss of redundancy for flutter prevention.