Airworthiness Directive · Amendment 39-19174 · Main rotor blades
Agusta S.p.A. Helicopters
This AD applies to Agusta S.p.A. Model AB139 and AW139 helicopters, certificated in any category, with a main rotor blade (MRB) part number (P/N) 3G6210A00131 with a serial number (S/N) 3615, 3634, 3667, or 3729 installed.
We are adopting a new airworthiness directive (AD) for Agusta S.p.A. (Agusta) Model AB139 and AW139 helicopters. This AD requires inspecting the main rotor blade (MRB) tip cap for disbonding. This AD is prompted by a report of the in-flight loss of an MRB tip cap. The actions of this AD are intended to prevent an unsafe condition on these helicopters.
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.
(1) Within 5 hours time-in-service (TIS), using a tap hammer or equivalent, tap inspect each MRB tip cap for disbonding in the area depicted in Figure 1 of Leonardo Helicopters Emergency Alert Service Bulletin No. 139-508, dated September 12, 2017 (EASB).
(i) If there is any disbonding, before further flight, remove the MRB from service.
(ii) If there is no disbonding, within 10 hours TIS, remove the MRB from service.
(2) After the effective date of this AD, do not install a MRB P/N 3G6210A00131 with a S/N 3615, 3634, 3667, or 3729 on any helicopter.
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
