80-15-11 KAWASAKI HEAVY INDUSTRIES, LTD.: Amendment 39-3853. Applies to Models KV107-II and KV107-IIA helicopters, certificated in all categories.
Compliance required as indicated unless already accomplished.
To prevent possible failure of aft transmission quill shafts, P/N 107D2067-1 and -3, accomplish the following:
(a) Within 50 hours time in service after the effective date of this AD, remove from service all quill shafts, P/N 107D2067-1 and -3, that have accumulated 5990 hours or more time in service, and replace with a new part of the same part number.
(b) Replace quill shafts, P/N 107D2067-1 and -3, that have less than 5990 hours time in service, with a new part of the same part number, when the parts have accumulated not more than 6040 hours time in service.
This amendment becomes effective August 7, 1980.