Airworthiness Directive · Amendment 39-17281 · Flight controls
Agusta S.p.A. (Type Certificate Currently Held by AgustaWestland S.p.A.) (Agusta) Helicopters
This AD applies to Agusta Model AW139 helicopters, serial numbers (S/N) 41201 through 41310, except S/N 41290, 41291, 41292, 41302, 41304, 41305, 41306, and 41309, certificated in any category.
We are publishing a new airworthiness directive (AD) for Agusta Model AW139 helicopters, which was sent previously to all known U.S. owners and operators of these helicopters. This AD requires inspecting the pilot's and co-pilot's collective and cyclic control sticks for correctly installed attaching hardware. This AD is prompted by a report of an incorrectly installed pilot's collective stick, pilot's cyclic stick, and co-pilot's cyclic stick. These actions are intended to prevent detachment of the cyclic or collective control stick, and subsequent loss of control of the helicopter.
You are responsible for performing each action required by this AD within the specified compliance time unless it has already been accomplished prior to that time.
Within 5 hours time-in-service (TIS):
(1) Inspect the pilot collective stick installation to determine whether the self-locking nuts, part-number (P/N) MS17825-4, are secured with cotter pins, P/N MS24665-136, as depicted in Figure 1 to paragraph (e) of this AD. If the self-locking nuts are not secured with cotter pins, before further flight, reinstall the pilot collective stick.
(2) Inspect the co-pilot collective stick installation to determine whether the ring nut (item 2) is loose and the quick-release pin (item 3) is installed as depicted in Figure 2 to paragraph (e) of this AD. If the ring nut is loose or the quick-release pin is not installed, before further flight, reinstall the co-pilot collective stick.
(3) Inspect the pilot cyclic stick installation for proper installation of the bolt (item 3), washer (item 4), self-locking nut (item 7), washer (item 6), and the cotter pin (item 8), as depicted in Figure 3 to paragraph (e) of this AD. If the pilot cyclic stick is not installed as depicted, before further flight, reinstall the pilot cyclic stick.
(4) Inspect the co-pilot cyclic stick installation to determine whether the ring nut (item 1) is loose and the quick-release pin (item 5) is installed as depicted in Figure 4 to paragraph (e) of this AD. If the ring nut is loose or the quick-release pin is not installed as depicted, before further flight, reinstall the co-pilot cyclic stick.
The aircraft, engines and makers this AD names, by the model designations in its text. A model listed here may still be outside the AD's serial ranges.
