AD/ENST 28/22 - Main Rotor Transmission Mount Bolts - Inspection
1AD/ENST 28/22 - Main Rotor Transmission Mount Bolts - Inspection
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COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY
SCHEDULE OF AIRWORTHINESS DIRECTIVES
Image unavailable in extracted text Enstrom F-28 Series Helicopters
AD/ENST 28/22 Main Rotor Transmission Mount
Bolts - Inspection
5/79
Applicability: All model F-28C with S/Nos. 451-2, 452-2, 453, 454-2, 455-2, 456-2, 457, 458, 459,
460-2, 462, 463-2 and 464-2.
All model 280C with S/Nos. 1145, to 1169.
Document: Enstrom Service Directive Bulletin No. 0049. Compliance: Within 100 hours time in service after 31 July 1979.
Background: It has been found that several of the NAS 146R-57 main rotor transmission mount bolts have defectively formed heads.