Summary
The FAA is adopting a new airworthiness directive (AD) for Leonardo S.p.a. (Leonardo) Model AB139 and AW139 helicopters. This AD requires removing certain main gearbox (MGB) input modules from service. This AD was prompted by the discovery that a batch of duplex bearings, which are installed on the MGB input modules, are defective. The actions of this AD are intended to address an unsafe condition on these products.
Directive Details
AD Number
FAA-2020-0554
Document Number
2020-19906
Type
Rule
Publication Date
September 10, 2020
Effective Date
October 15, 2020
Affected Manufacturer
Leonardo S.p.a.
Criticality
routine
Emergency
No
Docket ID
Docket No. FAA-2020-0554
Topics
Official Documents
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