Summary
We are adopting a new airworthiness directive (AD) for Model TH-1F, UH-1B, UH-1F, UH-1H, and UH-1P helicopters with a Helicopter Technology Company (HTC) main rotor (M/R) blade installed. This AD requires cleaning and visually inspecting the M/R blades and, depending on the outcome of the inspection, repairing or replacing the M/R blades. This AD is prompted by a report of an M/R blade with a fatigue crack in the grip plate and doublers at the blade retention bolt hole. The actions of this AD are intended to correct an unsafe condition on these products.
Directive Details
AD Number
FAA-2017-0894
Document Number
2018-00658
Type
Rule
Publication Date
January 17, 2018
Effective Date
February 1, 2018
Affected Manufacturer
Various Restricted Category
Criticality
routine
Emergency
No
Docket ID
Docket No. FAA-2017-0894
Topics
Official Documents
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