airworthiness · Rule · Final rule. · Published 2011-12-19 · Effective 2012-01-23 · 76 FR 78520
Document
Document number
2011-30999
Federal Register citation
76 FR 78520
Type
Rule
Action
Final rule.
Category
airworthiness
Manufacturer
Learjet Inc.
Publication date
2011-12-19
Effective date
2012-01-23
FAA docket
Docket No. FAA-2011-0651
Abstract
We are adopting a new airworthiness directive (AD) for all Learjet Inc. Model 45 airplanes. This AD was prompted by a report of the potential for fatigue cracking of the end cap of the main landing gear (MLG) prior to the published life limitation. This AD requires revising the maintenance program to incorporate life limits for the MLG actuator end cap. We are issuing this AD to prevent fatigue cracking of the end cap of the MLG, which could result in the failure of the MLG actuator upon landing, and failure of the MLG to extend or retract during flight.