COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 106 CIVIL AVIATION SAFETY AUTHORITY
SCHEDULE OF AIRWORTHINESS DIRECTIVES
Allison Turbine Engines - 250 Series
AD/AL 250/72
Amdt 1
No. 8 Bearing Oil Supply Tube 13/87 DM
Applicability: Model 250-C30, -C30L, -C30M, -C30P, -C30R and -C30S.
Requirement: 1. Inspect the No 8 bearing pressure oil tube in accordance with Allison CEB-A-72- 3165 Part I; and,
2. For operators who have previously complied with Allison CEB-A-72-3159 or actioned the original issue of this Directive, remove superseded oil tube assy P/N 23037410 and replace it with tube assy P/N 23038235 in accordance with Allison CEB-A-72-3165 Part II; or,
3. For operators who haven’t complied with Allison CEB-A- 72-3159 or actioned the original issue of this Directive, remove the No 8 bearing pressure oil tube P/N 6892825 and install new tube assy P/N 23038235 and oil fitting P/N 23035275 in accordance with Allison CEB-A-72-3165 Part III.
Compliance: For Part 1: Unless already accomplished, prior to further flight after 7 September 1987 and then subsequent to the last flight of each day until modified in accordance with Part 2 or Part 3 as applicable.
For Part 2: At the earliest possible opportunity after receipt of parts but no later than 10 December 1987.
For Part 3: At the earliest possible opportunity after receipt of parts but no later than 1 July 1988.
Note: Compliance with the previous issue of this Directive will require further action in accordance with Part 2.
Background: This Directive is amended to reflect Allison CEB-A-72-3165 which was issued subsequent to the cancellation of CEB-A-72-3159. SB -3159 was the Requirement Document quoted in the original issue of this Directive. “Interim” oil tube assy P/N 23037410 is now to be removed to correct a dimensional problem associated with its installation.
Overview
The Civil Aviation Regulations 1998, as amended by the legislative instrument F2006B02283, address the need for ensuring the airworthiness of aircraft and related components, specifically targeting issues identified with Allison Turbine Engines - 250 Series. This legislation, enacted by the Australian Parliament, aims to enhance aviation safety through the issuance of Airworthiness Directives. The policy objective is to mandate inspections and necessary modifications to maintain the safety standards of aviation components, ensuring that all civil aircraft meet the required safety benchmarks. This particular amendment, AD/AL 250/72 Amendment 1, focuses on the No 8 bearing oil supply tube of the Allison Turbine Engines - 250 Series, requiring inspections and replacements to rectify a dimensional issue identified in previous models.
This legislative instrument underscores the importance of adhering to specific timelines for compliance, ensuring that all modifications are completed within designated periods to maintain operational safety. The directive is applicable to certain models of the Allison Turbine Engines - 250 Series and outlines precise steps for inspection and replacement of the oil tube assembly, reflecting the latest guidance from Allison. By doing so, the legislation aims to prevent potential failures that could compromise the safety of air travel, thereby protecting both the passengers and crew on board.
Scope and Application
The Civil Aviation Regulations 1998, specifically under PART 39 - 106 Civil Aviation Safety Authority Schedule of Airworthiness Directives, addresses the Allison Turbine Engines - 250 Series, as detailed in AD/AL 250/72 Amendment 1 Number 8 Bearing Oil Supply Tube. This regulation applies to operators of the Allison 250 Series engines, including models 250-C30, -C30L, -C30M, -C30P, -C30R, and -C30S. The primary requirement is the inspection and, where necessary, replacement of the No 8 bearing pressure oil tube to ensure compliance with safety standards. The directive mandates specific actions based on whether operators have previously complied with related directives, thus ensuring that all affected engines are brought up to the current safety standard. Compliance deadlines are set for inspections and necessary modifications, with different timelines for operators who have and have not previously complied with related directives. This regulation extends across all Commonwealth jurisdictions, ensuring uniform safety standards across Australia.
Key Provisions
The Civil Aviation Regulations 1998, specifically Part 39 - 106, outline the Civil Aviation Safety Authority's (CASA) Schedule of Airworthiness Directives for Allison Turbine Engines - 250 Series. The relevant directive in this context is AD/AL 250/72 Amendment 1, issued on 13 August 1987, which pertains to the No 8 bearing oil supply tube. The directive applies to Allison engines of the model 250-C30, -C30L, -C30M, -C30P, -C30R, and -C30S (section 1).
The directive sets forth specific requirements for operators to follow. Firstly, operators must inspect the No 8 bearing pressure oil tube in accordance with Allison CEB-A-72-3165 Part I (section 2(1)). Secondly, for operators who have previously complied with Allison CEB-A-72-3159 or the original issue of this directive, the superseded oil tube assembly P/N 23037410 must be removed and replaced with tube assembly P/N 23038235, in line with Allison CEB-A-72-3165 Part II (section 2(2)). Thirdly, operators who have not complied with CEB-A-72-3159 or the original directive must remove the No 8 bearing pressure oil tube P/N 6892825 and install the new tube assembly P/N 23038235 and oil fitting P/N 23035275, as outlined in Allison CEB-A-72-3165 Part III (section 2(3)).
Compliance with these requirements is mandatory. For the inspection requirement, operators must complete the inspection before further flight after 7 September 1987 and then at the end of each day's last flight until modifications are made according to Part 2 or Part 3 as applicable (section 3). Operators who have already complied with previous directives must complete modifications by 10 December 1987 (section 3), while those who have not must complete them by 1 July 1988 (section 3). Failure to comply with these deadlines may have legal consequences.
The directive also specifies that compliance with the previous issue of this directive will require further action in accordance with Part 2, indicating that operators must take additional steps if they have previously complied with superseded directives (section 4). Non-compliance with these airworthiness directives could lead to penalties or other consequences under the Civil Aviation Regulations 1998, including potential civil or criminal sanctions, although the specific penalties are not detailed in the text.