AD/AL 250/67 Amdt 1 - Increased Labyrinth Seal Clearance Second Stage Turbine Nozzle
1AD/AL 250/67 Amdt 1 - Increased Labyrinth Seal Clearance Second Stage Turbine Nozzle
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COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 106 CIVIL AVIATION SAFETY AUTHORITY
SCHEDULE OF AIRWORTHINESS DIRECTIVES
Image unavailable in extracted text 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.