Document ID: chunk:federal_register_of_legislation:F2007L01049:body:0:p2
Version: federal_register_of_legislation:F2007L01049
Segment Type: other
Provision Reference: 
Character Range: 3646–5253

39-15021 dated 4 April 2007 refers.
Compliance:     1. Within 10 hours TIS after the effective date of this AD.

                2. Within 50 hours TIS after the effective date of this AD.

                3a. Within 100 hours after the effective date of this AD, thereafter, within every 100 hours TIS or at next annual inspection, whichever occurs first.

                3b. At the next propeller overhaul or next major propeller disassembly after the effective date of this AD.

                3c. Upon reaching the life limit of 10,000 hours total TIS.
             This Airworthiness Directive becomes effective on 20 April 2007.
Background:  This AD requires adding an operational revolutions per minute (RPM) restriction on the C406 and C409 propellers, and installing an RPM restriction placard in the cockpit.  This AD also adds a 10,000-hour total TIS life limit for these propellers. This AD also removes from service any propeller that has 10,000 hours or more total TIS, or that has unknown total TIS.  Also, this AD requires initial and repetitive propeller blade inspections for damage, and repair if necessary.  This AD results from testing by the manufacturer that identified stress conditions that affect the fatigue life and damage tolerance of C406 and C409 propellers, when installed on TCM IO-520, TSIO-520, or IO-550 reciprocating engines.  The issuing of this AD is intended to prevent blade or hub failure that could result in separation of a propeller blade and loss of control of the aeroplane.

David Punshon
Delegate of the Civil Aviation Safety Authority

16 April 2007