Document ID: chunk:federal_register_of_legislation:F2014L00527:body:0:p4
Version: federal_register_of_legislation:F2014L00527
Segment Type: other
Provision Reference: 
Character Range: 8413–10542

For Requirement 1.b. - Within 1000 hours time-in-service (TIS) from the previous CDU cone brake functional test carried out in accordance with AD/B747/298 Amdt 1 Requirement 1.b; and thereafter repeat the test at intervals not to exceed 1000 hours TIS.
             For Requirement 2 - Before further flight after the Requirement 1 functional test.
             For Requirement 3.a. - Within 36 months after the effective date of the original issue of this Directive.
             For Requirement 3.b. - Prior to or concurrently with Requirement 1.
             For Requirement 4 - Within 1,000 hours time in service (TIS) after the installation of the TRAS lock, or within 90 flight hours after the effective date of this Directive, whichever is later, and thereafter repeat the test at least every 1,000 hours TIS.
             For Requirement 5 - Before further flight.
             For Requirements 6 and 7 - As of the effective date of this Directive.
             This Amendment becomes effective on 14 May 2014.
Background:  The original issue of this Directive superseded AD/B747/231 Amdt 1, which was cancelled.  The Directive continued the repetitive inspection requirements of AD/B747/231 Amdt 1 but also required the installation and activation of TRAS lock on each thrust reverser together with various related modifications and installations.  The Directive also introduced additional repetitive functional testing and, if necessary, corrective action, at the same time the Directive provided dispatch limitations.
             These actions were designed to prevent an inadvertent deployment of a thrust reverser during flight, which could result in a loss of control of the aeroplane.

             Amendment 1 corrected editorial errors together with an omission in the compliance statement of the original Directive.

             Amendment 2, notates the acceptability of an AMOC that has been approved by the FAA for AD 2003-16-16.

   The original issue of this Airworthiness Directive became effective on 22 January 2004.

Mike Higgins
Delegate of the Civil Aviation Safety Authority

13 May 2014