Document ID: chunk:federal_register_of_legislation:F2009L03440:body:0:p2
Version: federal_register_of_legislation:F2009L03440
Segment Type: other
Provision Reference: 
Character Range: 2960–4074

Requirement 1.b. - Within 6,000 flight hours from the time of initial inspection mandated by this AD.

             For Requirement 2 - Within 750 flight hours after the effective date of this AD.

             For Requirement 2.a. - Prior to further flight.

             For Requirement 2.b. - Within 6,000 flight hours from the time of initial inspection mandated by this AD.

             For Requirement 3 - As of the effective date of this AD.
             This Airworthiness Directive becomes effective on 24 September 2009.
Background:  During final Acceptance Test Procedure, a small oil leak was discovered on the Spoiler Unload Valve and Rudder Shutoff Valve bodies.  Investigation revealed that a number of valves were manufactured with an incorrect wall thickness.  This thin wall condition caused cracking, subsequent external weeping and pressure loss from the subject valves.

             This condition, if not corrected, will cause a loss of hydraulic fluid and subsequent loss of spoiler and/or rudder control.

James Coyne
Delegate of the Civil Aviation Safety Authority

14 August 2009