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 250/58
Amdt 2
Gearbox Assembly - PTO Helical Gearshaft Assembly - Replacement
9/84
Applicability: All Model 250-C18, C20, C20B, C20F, B15G, B17, B17B, and B17C, engines with exceptions as listed in the requirement document.
Requirement: Allison 250-C18, C18A, C18B, C18C
Allison 250-C20, C20B, C20F
Allison 250-B15G
Allison 250-B17, B17B, B17C
: CEB-203
: CEB-1150
: TP CEB-71
: TP CEB-1126
Rev. 7
Rev. 7
Rev. 7
Rev. 7
Compliance: In accordance with the Requirement Document Para E.
Background: This Directive is amended to reflect the manufacturers Rev. 7 changes to the Requirement Documents Para 1.E Compliance Statement; sub-para 3 which requires the immediate replacement of superseded part numbered PTO shaft in the event of future shockload or sudden stoppage as defined in Para 3.1 and 3.2.