AD/CON/84 Amdt 3 - Starter Adapter Assembly (Cth)

AIRWORTHINESS DIRECTIVE On the effective date specified below, and for the reasons set out in the background section, the CASA delegate whose signature appears below revokes Airworthiness Directive (AD) AD/CON/84 Amdt 2 and issues the following AD under subregulation 39.001(1) of CASR 1998. The AD requires that the action set out in the requirement section (being action that the delegate considers necessary to correct the unsafe condition) be taken in relation to the aircraft or aeronautical product mentioned in the applicability section: (a) in the circumstances mentioned in the requirement section; and (b) in accordance with the instructions set out in the requirement section; and (c) at the time mentioned in the compliance section.

Teledyne Continental Motors Piston Engines AD/CON/84 Amdt 3 Starter Adapter Assembly 5/2007

Applicability: Teledyne Continental Motors (TCM) GTSIO-520 series reciprocating engines.

Note 1: These engines are installed on, but not limited to, Twin Commander (formerly Aero Commander) model 685, Cessna model 404, 411 series, and 421 series, British Aerospace, Aircraft Group, Scottish Division model B.206 series 2 and Aeronautica Macchi model AM-3 airplanes. Requirement: 1. For any engine that experiences rough running conditions regardless of time-in-service (TIS), perform the inspection procedures specified in Part 1 and Part 3 of Teledyne Continental Motors (TCM) Mandatory Service Bulletin (MSB) No. MSB94-4G dated 31 October 2005 or later FAA approved revisions, and replace components as necessary.

An engine is considered rough-running if there is a sudden increase in the perceived vibration levels that cannot be cleared by adjustment of the engine controls; particularly the fuel mixture setting. Information on rough running engines can be found in the aircraft manufacturer's Airplane Flight Manual, Pilot's Operating Handbook, or Aircraft Owners Manual.