Airworthiness Directive · Amendment 39-11898 · Agusta S.p.A. Model A109E Helicopters
Agusta S.p.A. Model A109E Helicopters
Model A109E helicopters, up to and including serial number (S/N) 11082, with main rotor rotating scissors assembly, part number (P/N) 109-0134-09, installed, certificated in any category.
Note 1: This AD applies to each helicopter identified in the preceding applicability provision, regardless of whether it has been otherwise modified, altered, or repaired in the area subject to the requirements of this AD. For helicopters that have been modified, altered, or repaired so that the performance of the requirements of this AD is affected, the owner/operator must request approval for an alternative method of compliance in accordance with paragraph (c) of this AD. The request should include an assessment of the effect of the modification, alteration, or repair on the unsafe condition addressed by this AD; and if the unsafe condition has not been eliminated, the request should include specific proposed actions to address it.
This document publishes in the Federal Register an amendment adopting Airworthiness Directive (AD) 2000-17-52, which was sent previously to all known U.S. owners and operators of Agusta S.p.A. (Agusta) Model A109E helicopters by individual letters. This AD requires, before further flight, visually inspecting any main rotor rotating scissors assembly for correct installation and replacing any unairworthy part with an airworthy part. If the rotating scissors attachment bolt (attachment bolt) is not replaced with a new part at the initial inspection, this AD also requires removing the rotating scissors assembly to inspect the attachment bolt for a crack and replacing any cracked attachment bolt with a new attachment bolt before further flight. This amendment is prompted by two incidents of flight control malfunctions. The actions specified by this AD are intended to prevent failure of the rotating scissors assembly and subsequent loss of control of the helicopter.
To prevent failure of the rotating scissors assembly and subsequent loss of control of the helicopter, accomplish the following:
(a) Before further flight, visually inspect the rotating scissors assembly for correct installation in accordance with Part I of Agusta Bollettino Tecnico No. 109EP-12, dated July 24, 2000 (ABT). Replace any unairworthy part with an airworthy part before further flight.
(b) If a new rotating scissors attachment bolt (attachment bolt), P/N NAS6606D28 or NAS1306-28D, was not installed during compliance with paragraph (a) of this AD, within the next 50 hours time-in-service (TIS), in accordance with Part II of the ABT, visually inspect the attachment bolt, P/N NAS6606D28 or NAS1306-28D, for a crack. Replace any cracked attachment bolt with a new attachment bolt before further flight.
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.
Aircraft
