SCHEDULE OF AIRWORTHINESS DIRECTIVES
Robinson R22 · Airworthiness Directives
Overview
This document is an Airworthiness Directive (AD) issued by the Civil Aviation Safety Authority of Australia, specifically addressing the Robinson R22 series helicopters. It outlines mandatory requirements for the replacement of certain flexplates to ensure the safety and airworthiness of the aircraft. The directive is applicable to all R22 series helicopters equipped with specific part numbers of flexplates that have been identified as having potential failure risks. The document emphasizes the importance of compliance within a specified timeframe to mitigate the risk of accidents due to flexplate failures, which have been linked to previous incidents. This AD serves as a critical safety measure for operators and maintenance personnel of the Robinson R22.
- All R22 series helicopters with flexplates P/N A193-1 or A947-1 Rev A thru D must comply.
- Replace affected flexplates with P/N A947-1 E or F as per SB75.
- Compliance is required within 25 hours TIS or by 31 July 1998, whichever comes first.
- The directive was issued due to previous flexplate failures leading to accidents.
- This amendment is the second update to the original directive issued in 1994.
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Reference only, not for flight. Use the current approved manual for your aircraft. See terms, section 5.
Document
Source
Copy found at 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 ·
- 11 KB
- Copy found at ·
- services.casa.gov.au
What is the SCHEDULE OF AIRWORTHINESS DIRECTIVES?
The SCHEDULE OF AIRWORTHINESS DIRECTIVES is a airworthiness directives for the Robinson R22, dated 1998.
How many pages is the SCHEDULE OF AIRWORTHINESS DIRECTIVES?
The copy of the SCHEDULE OF AIRWORTHINESS DIRECTIVES on file runs 1 pages.
What year was the SCHEDULE OF AIRWORTHINESS DIRECTIVES published?
The SCHEDULE OF AIRWORTHINESS DIRECTIVES — the Robinson R22 airworthiness directives on file — is dated 1998.
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In this document
Applicability
This Airworthiness Directive applies to all Robinson R22 series helicopters that are fitted with flexplates part numbers A193-1 or A947-1 Rev A through D.
Requirement
Operators are required to replace all affected flexplates with part number A947-1 E or F, following the guidelines set forth in Robinson R22 Service Bulletin SB75.
Compliance
Compliance with this directive is mandatory unless the replacement has already been completed. The deadline for compliance is within 25 hours of time in service from the issue date of this directive or by 31 July 1998, whichever comes first.
Background
The directive was issued in response to reported failures of flexplates in the forward position of the tail rotor drive shaft, which have led to accidents. The document details the history of these failures and the subsequent actions taken by aviation authorities to ensure safety.
Amendment History
This is the second amendment to the original Airworthiness Directive, which was first issued on 15 June 1994. The first amendment became effective on 14 December 1994.
Summary written by AI from the source document. Check the original before relying on it. See which parts of Sprinkle are written by AI.
Safety notes
- Failure to replace the affected flexplates may lead to serious safety risks, including potential crashes.
Summary written by AI from the source document. Check the original before relying on it. See which parts of Sprinkle are written by AI.
Full document text
COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Robinson R22 Series Helicopters AD/R22/37 Amdt 2 Forward Flexplate 9/98 DM Applicability: All R22 series helicopters fitted with flexplates P/N A193-1 or A947-1 Rev A thru D. Requirement: Replace all flexplates P/N A193-1 or A947-1 Rev A thru D with a flexplate P/N A947-1 E or F in accordance with Robinson R22 Service Bulletin SB75. Note: FAA Priority Letter AD 98-14-08 refers. Compliance: Unless previously accomplished, within 25 Hours TIS from issue of this directive or by 31 July 1998, whichever occurs first. This amendment becomes effective on 8 July 1998. Background: In 1993 the Australian CAA received advice that two flexplates located in the forward position of the tail rotor drive shaft had failed. In 1994 the NZ Airworthiness Authorities advised that a similar flexplate failure had recently occurred there. One flexplate had taken approximately 300 flights from the corrosion pit initiation until the final failure. The FAA and the manufacturer were advised with the FAA subsequently issuing AD 94-11-01. In May 1998 an aircraft crashed in NZ due to a flexplate failure. This aircraft had the pre A947-1 Revision E flexplate fitted. FAA has subsequently determined that repetitive inspections are insufficient to ensure airworthiness. This amendment provides closing action by requiring replacement of faulty flexplates. Amendment 1 to this airworthiness directive became effective on 14 December 1994. The original issue of this airworthiness directive became effective on 15 June 1994.