COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 106 CIVIL AVIATION SAFETY AUTHORITY
SCHEDULE OF AIRWORTHINESS DIRECTIVES
Pratt and Whitney Turbine Engines - JT8D Series
AD/JT8D/35
Amdt 1
Combustion Chamber Outer Case 1/99
Applicability: Pratt & Whitney JT8D-1, -1A, -1b, -7 ,-7A, -7B, -9, -11, -15, -15A, -17, -17A, -17R
and -17AR turbofan engines, with combustion chamber outer case (CCOC) part numbers 490547, 5421555, 616315, 728829, 728829-001, 730413, 730413-001,
730414, 730414-001, 767197, 767279, or 767279-001 installed.
Requirement: For engines identified by serial number (S/N) in Table 1 of FAA AD 98-04-39, perform a one time borescope inspection of the CCOC rear flange in accordance with paragraph 2.A.(5) of Pratt and Whitney Alert Service Bulletin (ASB) No.A6202, Revision 1, dated 4 January, 1998.
Compliance: Unless previously accomplished:
- For engines installed on McDonnell Douglas DC-9 series aircraft, inspect within 1,000 cycles in service (CIS) since the last ultrasonic inspection of the CCOC rear flange performed in accordance with AD AD/JT8D/22 Amdt 4 (FAA AD 96-23- 14), or within 100 CIS after the effective date of this AD, whichever occurs later.
2. For engines installed on Boeing 737 series aircraft, inspect within 1,500 CIS since the last ultrasonic inspection of the CCOC rear flange performed in accordance with AD/JT8D/22 Amdt 4 (FAA AD 96-23-14), or within 100 CIS after the effective date of this AD, whichever occurs later.
3. For engines installed on Boeing 727 series aircraft, inspect within 2,500 CIS since the last ultrasonic inspection of the CCOC rear flange performed in accordance with AD/JT8D/22 Amdt 4 (FAA AD 96-23-14), or within 100 CIS after the effective date of this AD, whichever occurs later.
This Amendment becomes effective on 28 January 1999.
Background: The FAA has advised that certain serial number JD8D engines have been inspected using an out-of-calibration ultrasonic probe. The inspection in question is the subject of AD/JT8D/22 Amdt 4. The one time borescope inspection will ensure the integrity of the CCOC aft flange has not been compromised by the discrepant inspection.
This amendment corrects the reference to FAA AD 98-04-39.
The original issue of this Airworthiness Directive became effective on 8 October 1998.
Overview
The Civil Aviation Regulations 1998, enacted by the Parliament of Australia, aim to regulate the safety standards of civil aviation within the country. This legislation includes detailed rules and directives to ensure the safe operation of aircraft and related equipment. One such directive, AD/JT8D/35Amdt 1, focuses specifically on the Pratt and Whitney JT8D Series turbine engines, addressing issues with the combustion chamber outer case (CCOC). This amendment was introduced to rectify a problem identified by the Federal Aviation Administration (FAA), where certain Pratt and Whitney JT8D engines had been inspected using an out-of-calibration ultrasonic probe, potentially compromising the integrity of the CCOC rear flange. The policy objective behind this directive is to mandate a one-time borescope inspection for specified engines to ensure compliance with safety standards, thereby mitigating the risks associated with the previously flawed inspections.
Scope and Application
The Civil Aviation Regulations 1998, specifically Part 39, mandates certain safety protocols for Pratt and Whitney JT8D Series turbine engines with specified combustion chamber outer case (CCOC) parts. These regulations apply to particular serial numbers of Pratt and Whitney JT8D engines, identified in Table 1 of FAA AD 98-04-39, which are installed on McDonnell Douglas DC-9 series, Boeing 737 series, and Boeing 727 series aircraft. The requirement is for a one-time borescope inspection of the CCOC rear flange, following the detailed procedures outlined in Pratt and Whitney Alert Service Bulletin No. A6202, Revision 1. Compliance necessitates inspecting engines within a certain number of cycles in service after the last ultrasonic inspection, or within a specific timeframe after the effective date of the amendment, depending on the aircraft type. This amendment is enforced under the Civil Aviation Safety Authority, highlighting the importance of maintaining airworthiness standards to ensure safety in civil aviation across Australia.
Key Provisions
The primary operative section of this legislative instrument (AD/JT8D/35 Amdt 1) requires a one-time borescope inspection of the combustion chamber outer case (CCOC) rear flange for Pratt & Whitney JT8D series turbofan engines installed in specific aircraft models. This inspection is necessary for engines identified by serial number in Table 1 of FAA AD 98-04-39 and must be performed in accordance with paragraph 2.A.(5) of Pratt & Whitney Alert Service Bulletin (ASB) No.A6202, Revision 1. The specific timing for the inspection varies depending on the aircraft model: for McDonnell Douglas DC-9 series aircraft, the inspection must occur within 1,000 cycles in service (CIS) since the last ultrasonic inspection of the CCOC rear flange, or within 100 CIS after the effective date of this AD, whichever is later; for Boeing 737 series aircraft, the inspection must occur within 1,500 CIS since the last ultrasonic inspection, or within 100 CIS after the effective date, whichever is later; and for Boeing 727 series aircraft, the inspection must occur within 2,500 CIS since the last ultrasonic inspection, or within 100 CIS after the effective date, whichever is later.
The Act imposes specific obligations on the parties and entities it governs. Operators of Pratt & Whitney JT8D series turbofan engines installed on McDonnell Douglas DC-9, Boeing 737, and Boeing 727 series aircraft must ensure that the required one-time borescope inspection is conducted according to the specified timelines and procedures. These obligations are crucial to ensure that the integrity of the CCOC rear flange has not been compromised by any previous discrepant inspections. The Act also mandates that the inspection be carried out in accordance with the detailed guidelines provided in Pratt & Whitney ASB No.A6202, Revision 1, dated 4 January 1998.
Failure to comply with the requirements set out in this legislative instrument may result in significant civil and criminal consequences. Although the specific penalties are not detailed in the text, non-compliance with Civil Aviation Regulations in Australia can lead to substantial fines, imprisonment, or both. The severity of the penalty would depend on the nature and extent of the breach, and the potential for harm caused by the non-compliance. It is crucial for operators and relevant parties to adhere to the stipulated timelines and inspection procedures to avoid any legal repercussions.