AIRWORTHINESS DIRECTIVE
For the reasons set out in the background section, the CASA delegate whose signature appears below issues the following Airworthiness Directive (AD) under subregulation 39.1 (1) of CAR 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.
Pratt and Whitney Canada Turbine Engines - PW 100 Series
AD/PW 100/9 Fuel Heater 4/2001
Applicability: All PW100 Series engines not incorporating the improved fuel heater introduced by Pratt and Whitney Canada Service Bulletin PW100-72-21100.
Requirement: 1. Replace Stewart Warner fuel heaters, P/No 10718 (all series numbers), with improved heaters in accordance with Pratt and Whitney Canada (PWC) Service Bulletin PW100-72-21100, Revision 2 and PWC Service Information Letter (SIL) PW100-074.
2. No person shall install a pre-SB PW100-72-21100 configuration fuel heater on an Australian registered aircraft.
Note 1: Transport Canada AD CF-2000-34 refers.
Note 2: Compliance with previous issues of SB PW100-72-21100 satisfies the intent of this Airworthiness Directive.
Compliance: 1.(a) For fuel heaters listed in Tables 1 and 2 of SIL PW100-074, replace the fuel heater at the next scheduled low pressure fuel filter removal after the effective date of this Directive, or 31 August 2002, whichever occurs first.
1.(b) For fuel heaters not listed in Tables 1 and 2 of SIL PW100-074, replace the fuel heater no later than 31 August 2002.
2. After 19 May 2001.
This Airworthiness Directive becomes effective on 19 April 2001.
Pratt and Whitney Canada Turbine Engines - PW 100 Series
AD/PW 100/9 (Continued)
Background: There have been incidents where the studs that retain the fuel filter bowl have been pulled from the housing resulting in fuel leakage.
The improved fuel heater and a review of maintenance practices will preclude fuel leaks associated with pulled studs.
Eugene Paul Holzapfel
Delegate of the Civil Aviation Safety Authority 8 March 2001
The above AD is notified in the Commonwealth of Australia Gazette on 21 March 2001.
Overview
The Airworthiness Directive AD/PW 100/9, issued in 2001, addresses the problem of fuel leaks due to the failure of studs retaining the fuel filter bowl in Pratt and Whitney Canada Turbine Engines of the PW100 Series. This directive was enacted by the Civil Aviation Safety Authority (CASA) under subregulation 39.1 (1) of the Civil Aviation Regulations 1998, aiming to ensure the continued airworthiness of affected aircraft. The policy objective is to mitigate the risk of fuel leaks by mandating the replacement of specific Stewart Warner fuel heaters with improved versions as detailed in Pratt and Whitney Canada Service Bulletin PW100-72-21100, Revision 2, and Service Information Letter PW100-074. The directive also prohibits the installation of pre-Service Bulletin PW100-72-21100 configuration fuel heaters on Australian registered aircraft. The compliance requirements specify deadlines for replacing the affected fuel heaters, with different timelines for those listed in the specified tables and those not listed, culminating in a final compliance date of 31 August 2002.
Scope and Application
This Airworthiness Directive (AD) applies specifically to Pratt and Whitney Canada (PWC) turbine engines of the PW100 Series that have not yet incorporated the improved fuel heater introduced by PWC Service Bulletin PW100-72-21100. The AD is issued under the authority of the Civil Aviation Safety Authority (CASA) and pertains to all such engines currently in use in Australia. The directive mandates the replacement of Stewart Warner fuel heaters, part number 10718 (all series numbers), with improved heaters as detailed in PWC Service Bulletin PW100-72-21100, Revision 2, and PWC Service Information Letter (SIL) PW100-074. Furthermore, it prohibits the installation of pre-SB PW100-72-21100 configuration fuel heaters on Australian registered aircraft. The AD delineates specific timelines for compliance, requiring that fuel heaters listed in Tables 1 and 2 of SIL PW100-074 be replaced at the next scheduled low-pressure fuel filter removal following the directive's effective date, or by 31 August 2002, whichever is earlier. For fuel heaters not listed in these tables, replacement must occur no later than 31 August 2002. The AD came into effect on 19 April 2001, as notified in the Commonwealth of Australia Gazette on 21 March 2001.
Key Provisions
The Airworthiness Directive (AD) issued under subregulation 39.1 (1) of the Civil Aviation Regulations 1998 (CAR 1998) applies to all Pratt and Whitney Canada (PWC) PW100 Series engines that do not have the improved fuel heater introduced by PWC Service Bulletin PW100-72-21100 (section 1). Specifically, the directive mandates the replacement of Stewart Warner fuel heaters, part number 10718 (all series numbers), with improved heaters in accordance with PWC Service Bulletin PW100-72-21100, Revision 2, and PWC Service Information Letter (SIL) PW100-074 (section 1). Additionally, the AD prohibits the installation of pre-Service Bulletin PW100-72-21100 configuration fuel heaters on Australian registered aircraft (section 1).
The AD imposes several obligations on the parties and entities it governs. Firstly, it requires the replacement of specified fuel heaters within a defined timeframe. For fuel heaters listed in Tables 1 and 2 of SIL PW100-074, the replacement must occur at the next scheduled low pressure fuel filter removal after the effective date of this directive, or by 31 August 2002, whichever comes first. For fuel heaters not listed in Tables 1 and 2 of SIL PW100-074, the replacement must occur no later than 31 August 2002 (section 1(a) and (b)). Furthermore, the AD prohibits the installation of pre-Service Bulletin PW100-72-21100 configuration fuel heaters on Australian registered aircraft after 19 May 2001 (section 2).
Failure to comply with this AD can result in serious consequences. Although the specific offences, penalties, or civil/criminal consequences are not detailed in the text, it is evident that non-compliance with an Airworthiness Directive issued by the Civil Aviation Safety Authority (CASA) can lead to regulatory action, potential grounding of aircraft, and other enforcement measures. The directive itself references Transport Canada AD CF-2000-34 and notes that compliance with previous issues of SB PW100-72-21100 satisfies the intent of this AD, suggesting that adherence to the directive is critical to maintaining airworthiness standards (section 1 Note 1 and 2).