AD/R22/23 - Main Rotor Gearbox Ring Gear Bolts - Inspection and Modification

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

Legislation au F2006B06429 In force Legislative Instrument

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COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY

SCHEDULE OF AIRWORTHINESS DIRECTIVES

 


Robinson R22 Series Helicopters

 

AD/R22/23  Main Rotor Gearbox Ring Gear Bolts - Inspection and Modification

Applicability: All R22 servo helicopters.


10/84

 

Requirement: Robinson service bulletin No. 43 dated 24 August 1984, or FAA AD 84-18-04 of 6 September 1984.

 

Compliance: 1. Inspect in accordance with the Requirement Document.

 

Within the next 15 hours time in service after 13 September 1984. Thereafter at intervals not exceeding 50 hours time in service from the last inspection.

 

2. Modify the main rotor gearbox in accordance with Robinson Kit No. KI-37 within the next 200 hours time in service after 13 September 1984.

 

Note: When gearbox has been modified, inspection may be discontinued.

 

Background:  There have been cases of ring gear bolt breaking/head separation in main rotor gearbox during normal service.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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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.