AD 82-01-06

82-01-06 COSTRUZIONI AERONAUTICHE GIOVANNI AGUSTA: Amendment 39-4290. Applies to Model A109A series helicopters through Serial Number 7169 equipped with engine mount central legs, P/N 109-0605-06 and 109-0605-07, certificated in all categories (Airworthiness Docket No. 81-ASW-43).

Compliance is required within 200 hours' time in service after the effective date of this AD, unless already accomplished.

To prevent failure of the engine mount central leg and possible loss of engine support, accomplish the following:

(a) Remove the engine mount central legs, P/N 109-0605-06-13, 109-0605-06-14, 109-0605-07-13, and 109-0605-07-14.

(b) Install engine mount central leg assemblies, P/N 109-0640-84-1 and -2, and P/N 109-0640-85-1 and -2 as described in Section 71-20-00 of the A109A maintenance manual.

(c) Install engines and check engine to transmission alignment as described in Section 71-00-00 of the A109A maintenance manual.

(d) If an equivalent means of compliance is used in complying with this AD, that equivalency must be approved by the Chief, Aircraft Certification Staff, AEU-100, FAA, Europe, Africa and Middle East Office, c/o American Embassy, Brussels, Belgium. Compliance with Agusta Technical Bulletin No. 109-25, dated August 29, 1980, constitutes compliance with this AD.

This amendment becomes effective February 8, 1982.