AD/AL 250/67 Amdt 1 - Increased Labyrinth Seal Clearance Second Stage Turbine Nozzle

Administered by Department of Infrastructure, Transport, Regional Development, Communications, Sport and the Arts

Legislation au F2006B02278 Not in force Legislative Instrument

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COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 106 CIVIL AVIATION SAFETY AUTHORITY

SCHEDULE OF AIRWORTHINESS DIRECTIVES

 


Allison Turbine Engines - 250 Series

 

AD/AL 250/67

Amdt 1


Increased Labyrinth Seal Clearance Second Stage Turbine Nozzle


12/85

 

Applicability: All Model 250-C28B and C28C engines and turbine assemblies listed in the Requirement Document.

 

Requirement: Allison 250-C28B, C28C CEB-72-2123 Rev 1.

 

Note: Compliance with the previous issue of this Directive constitutes compliance with this issue.

 

Compliance: In accordance with the Requirement Document.

 

Background: This Directive is amended to reference Rev 1 of CEB-72-2123 which amplifies model and turbine effectivity by serial number and clarifies para (c) of accomplishment instructions.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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Sourced from the Federal Register of Legislation at 26 August 2026. For the latest information on Australian Government law please go to https://www.legislation.gov.au.