SCHEDULE OF AIRWORTHINESS DIRECTIVES
Robinson R44 · Airworthiness Directives
Overview
This document is an Airworthiness Directive (AD) issued by the Civil Aviation Safety Authority of Australia, specifically addressing the Robinson R44 Series Helicopters. It outlines a critical safety requirement regarding the oil line elbows used in these helicopters. The directive mandates the replacement of specific aluminum elbows with steel alternatives to prevent potential engine failure due to oil loss. The document is intended for operators and maintenance personnel of the R44 helicopters, ensuring compliance with safety standards and maintaining airworthiness. The directive includes details on the applicability, compliance timeline, and background information regarding the safety issue.
- Applies to all Robinson R44 helicopters, serial numbers 0001 through 0330.
- Aluminum elbows must be replaced with steel elbows to prevent engine failure.
- Compliance must be completed within 50 hours of service after the directive's effective date.
- The directive is effective from 21 May 1998.
- Background reports indicate cracking of aluminum elbows leading to oil loss.
Document
Source
Originally published by services.casa.gov.au. Sprinkle hosts a reference copy with an added summary, specifications and searchable full text.
Document details
- Type
- Airworthiness Directives
- Year
- 1998
- Pages
- 1
- File size
- 10 KB
- Publisher
- services.casa.gov.au
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In this document
Applicability
The Airworthiness Directive applies to all Robinson R44 helicopters with serial numbers ranging from 0001 to 0330.
Requirement
Operators are required to remove any aluminum (blue-coloured) AN823-8D (45 degree) or MS20822-8D (90 degree) elbows connecting the A723 oil cooler lines to the engine accessory case. These must be replaced with airworthy MS20823-8 (45 degree) steel elbows or MS20822-8 (90 degree) steel elbows, as applicable.
Compliance
Compliance with this directive is mandatory unless the replacement has already been performed. The replacement must be completed within 50 hours of time in service after the effective date of the directive.
Background
The directive was issued following reports of cracking in the aluminum elbows, which led to loss of engine oil and subsequent engine failure. This highlights the critical nature of the replacement to ensure safety.
Safety notes
- Failure to comply with this directive may result in engine failure due to oil loss.
Full document text
COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Robinson R44 Series Helicopters AD/R44/9 Oil Line Elbows 6/98 Applicability: All R44 helicopters, serial numbers 0001 through 0330. Requirement: Remove any aluminium (blue-coloured) AN823-8D (45 degree) or MS20822-8D (90 degree) elbows that connect the A723 oil cooler lines to the engine accessory case and replace them with airworthy MS20823-8 (45 degree) steel elbows or MS20822-8 (90 degree) steel elbows, as applicable. Note: 1 FAA AD 98-05-10 Amdt 39-10371 refers. Note: 2 Robinson Helicopter Company R44 Service Bulletin SB-25, dated 01 October 1997 refers. Compliance: Unless previously carried out, within 50 hours time in service after the effective date of this Directive. This airworthiness directive becomes effective on 21 May 1998. Background: The manufacturer has received two reports of cracking of the aluminium elbows which connect the oil cooler lines to the engine accessory case. The helicopters experienced loss of engine oil, resulting in engine failure.
What's in the Robinson R44 TCDS
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