COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES McDonnell Douglas (Hughes) and Kawasaki 369 Series Helicopters AD/HU 369/101 Oil Cooler Blower Bracket 13/99 Applicability: Model 369D, 369E, 369FF, 500N, and 600N helicopters with oil cooler blower bracket, P/No 369F5190-1, installed. Requirement: Replace oil cooler blower bracket, P/No. 369F5190-1, with a serviceable bracket, P/No. 369F5194-1. Note: FAA AD 99-20-12 also refers. Compliance: Within 100 hours time in service after the effective date of this airworthiness directive. This Airworthiness Directive becomes effective on 30 December 1999. Background: There have been reports of cracked oil cooler blower brackets. Failure of a bracket can result in loss of cooling of engine oil and transmission oil and a subsequent forced landing.