Document ID: chunk:federal_register_of_legislation:F2006B02252:body:0
Version: federal_register_of_legislation:F2006B02252
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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 250/38 Idler Gearshafts - Replacement 10/79

            Applicability: All 250-C28 and -C30 series models fitted with generator idler gearshaft P/N 6898980 or 6898591 and 77 tooth idler gearshaft P/N 6898652.

Document:    1.   Allison 250-C28 CEB No. 72-2003; or Allison 250-C30 CEB No. 72-3003; or
             2.   FAA AD 79-16-06 Amendment 39-3527 also refers.
Compliance:  1.   For 250-C28 engines: Prior to reaching 9000 cycles.
             2.   For 250-C30 engines: Prior to reaching 2000 cycles.
             3.   For engines which may have exceeded the maximum permissible number of cycle at the time of promulgation of this Directive 3 September 1979, within 50 cycles.

            Background: This Directive is issued to prevent sudden power loss due to accessory drive gearbox gearshaft failure.