AIRWORTHINESS DIRECTIVE
On the effective date specified below, and for the reasons set out in the background section, the CASA delegate whose signature appears below revokes Airworthiness Directive (AD) AD/DHC-8/98 and issues the following AD under subregulation 39.1 (1) of CASR 1998. The AD requires that the action set out in the requirement section (being action that the delegate considers necessary to correct the unsafe condition) be taken in relation to the aircraft or aeronautical product mentioned in the applicability section: (a) in the circumstances mentioned in the requirement section; and (b) in accordance with the instructions set out in the requirement section; and (c) at the time mentioned in the compliance section.
Bombardier (Boeing Canada/De Havilland) DHC-8 Series Aeroplanes
AD/DHC-8/98
Amdt 1
Engine Oil Coolers 8/2004
Applicability: Model DHC-8 aeroplanes on which engine oil coolers have been installed per LORI, Inc., Supplemental Type Certificate SA8937SW.
Note 1: These oil coolers may be installed on but may not be limited to Model DHC- 8-101, -102, -103, -106, -201, -202, -301, -311, -314, and –315 aeroplanes.
Requirement: 1. Carry out a review of aeroplane maintenance records, or a detailed inspection in accordance with the Accomplishment Instructions of Honeywell Service Bulletin 28E99-79-2036, dated September 23, 2002, to positively determine the part numbers (P/N) and serial numbers (S/N) of the engine oil coolers. If neither engine oil cooler has a S/N as listed in Table 1 of the service bulletin, no further action is required.
2a. If only one engine oil cooler has a S/N as listed in Table 1: remove the affected part and install a part that has been reworked per the service bulletin.
2b. If both engine oil coolers have S/Ns as listed in Table 1 of the service bulletin: remove the affected parts and install a part that has been reworked per the service bulletin.
3. Do not install an engine oil cooler having a S/N as listed in Table 1 of Honeywell Service Bulletin 28E99-79-2036, dated September 23, 2002.
Note 2: FAA AD 2004-09-31 Amdt 39-13621 refers.
Compliance: For Requirement 1: Unless previously accomplished, within 7 days after the effective date of this AD,
For Requirement 2a: Unless previously accomplished, within 90 days after the effective date of this AD.
For Requirement 2b: At least one of the oil coolers must be replaced before further flight with the second oil cooler to be replaced within 90 days from the effective date of this Directive.
For Requirement 3: From the effective date of this Directive.
Bombardier (Boeing Canada/De Havilland) DHC-8 Series Aeroplanes
AD/DHC-8/98 Amdt 1 (continued)
This Amendment becomes effective on 5 August 2004.
Background: This action is necessary to prevent oil leakage from the engine oil coolers, consequent in-flight engine shutdown due to low oil pressure, and reduced controllability of the aeroplane. This action is intended to address the identified unsafe condition.
This amendment changes the applicability of the Directive by removing reference to specific models, but retaining the reference to the Lori STC, which is the determining feature for action to take place.
The original issue of this Directive became effective on 8 July 2004.
James Coyne
Delegate of the Civil Aviation Safety Authority 23 June 2004
The above AD is notified in the Commonwealth of Australia Gazette on 14 July 2004.
Overview
The Airworthiness Directive (AD) issued under the Civil Aviation Act 1988 (Cth) addresses the critical safety issue of oil leakage from engine oil coolers in Bombardier (Boeing Canada/De Havilland) DHC-8 Series aeroplanes that have specific engine oil coolers installed as per LORI, Inc., Supplemental Type Certificate SA8937SW. This directive, which became effective on 5 August 2004, aims to mitigate the risk of in-flight engine shutdown due to low oil pressure, which could significantly reduce the controllability of the aeroplane. The directive was enacted by the Civil Aviation Safety Authority (CASA) as a necessary measure to ensure the continued safety of the aircraft in question. The policy objective of this directive is to mandate specific actions to be taken by aircraft operators to prevent unsafe conditions, thereby safeguarding flight operations and enhancing overall aviation safety standards in Australia.
Scope and Application
The Airworthiness Directive AD/DHC-8/98 Amendment 1 applies to Bombardier (Boeing Canada/De Havilland) DHC-8 Series aeroplanes that have engine oil coolers installed in accordance with the LORI, Inc., Supplemental Type Certificate SA8937SW. This includes, but is not limited to, specific models such as DHC-8-101, -102, -103, -106, -201, -202, -301, -311, -314, and -315. The directive mandates certain actions to rectify an identified unsafe condition, specifically oil leakage from the engine oil coolers, which can lead to in-flight engine shutdowns due to low oil pressure and reduced controllability of the aeroplane. The directive applies nationally across the Commonwealth of Australia and is enforced by the Civil Aviation Safety Authority (CASA). The specified actions must be carried out within defined timeframes following the directive’s effective date. Any exclusions or exemptions from this directive are not mentioned in the text, implying that all applicable aircraft must comply unless otherwise specified through subordinate instruments or further CASA communication.
Key Provisions
This Airworthiness Directive (AD) from the Civil Aviation Safety Authority (CASA) pertains to Bombardier (Boeing Canada/De Havilland) DHC-8 Series Aeroplanes with engine oil coolers installed according to LORI, Inc., Supplemental Type Certificate SA8937SW (Section 1). Specifically, it addresses a safety concern identified with certain engine oil coolers, which could lead to oil leakage, engine shutdown, and reduced controllability of the aircraft (Section 2). The AD revokes a previous AD, AD/DHC-8/98, and introduces new requirements aimed at mitigating the identified unsafe condition (Section 1).
The primary obligations imposed by this AD (Section 3) include conducting a review of maintenance records or a detailed inspection to determine the part numbers and serial numbers of the engine oil coolers. Operators must ensure that these coolers meet specific criteria: if neither cooler has a serial number listed in Table 1 of Honeywell Service Bulletin 28E99-79-2036, dated September 23, 2002, no further action is required. However, if one or both coolers have the specified serial numbers, they must be removed and replaced with reworked parts as per the service bulletin. Additionally, operators are prohibited from installing any engine oil coolers with serial numbers listed in Table 1 (Section 3).
The compliance timeline is also outlined in the AD. For the review of maintenance records or inspection, the action must be completed within 7 days from the effective date of this AD. If any coolers require replacement due to matching serial numbers, one cooler must be replaced before further flight, with the second cooler to be replaced within 90 days from the effective date of this Directive (Section 4). The prohibition on installing coolers with specified serial numbers takes effect immediately upon the AD's effective date (Section 4). Failure to comply with these requirements may result in serious safety risks, including in-flight engine shutdown and compromised aircraft control.
The AD does not explicitly state specific penalties or consequences for non-compliance; however, any breach of CASA directives can lead to enforcement actions under the Civil Aviation Act 1988. This could include fines, operational restrictions, or other regulatory actions to ensure compliance and maintain air safety standards. The severity of these consequences would depend on the specific circumstances of the non-compliance and the discretion of CASA.