COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY
SCHEDULE OF AIRWORTHINESS DIRECTIVES
Gulfstream (Grumman) G1159 and G-IV Series Aeroplanes
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.
AD/G1159/38 Electrical Power - Alternator Feeder Cable 7/2000
Applicability: Model G-IV series aeroplanes, serial numbers 1000 through 1404 inclusive. Requirement: Modify the engine alternator feeder cables in accordance with Gulfstream IV
Customer Bulletin No. 112, dated 15 February 2000, and Gulfstream IV Aircraft
Service Change (ASC) No. 410, dated 11 February 2000 as follows:
- For aeroplanes having serial numbers 1000 through 1384 inclusive - Accomplish sub paragraphs a.(i) and a.(ii) of this Directive for the left and right engines, in accordance with Paragraphs B. and C. of the Modification Instructions of the ASC.
(i) Replace the alternator power feeder cables with new cables, and reroute the cables.
(ii) Install additional brackets and clamps.
b. For aeroplanes having serial numbers 1385 through 1404 inclusive - Accomplish sub paragraphs b.(i) and b.(ii) of this Directive on the right engine in accordance with paragraph D. of the Modification Instructions of the ASC.
(i) Install a bracket and spacer.
(ii) Reroute the alternator feeder cables.
Note 1: On some aeroplanes, some of the actions described in the aircraft service change were accomplished prior to the effective date of this Directive. On these aeroplanes, these actions are not required to be repeated. However, any action described in the aircraft service change that has not been accomplished on these aeroplanes must be accomplished in accordance with this requirement.
Note 2: FAA AD 2000-07-25 Amdt 39-11680 refers.
COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY
SCHEDULE OF AIRWORTHINESS DIRECTIVES
Compliance: Within 150 flight hours time in service after the effective date of this Directive.
This Airworthiness Directive becomes effective on 13 July 2000.
Background: The United States Federal Aviation Administration has advised of an incident of an in-flight engine fire on a Model G-IV series aeroplane due to chafing of the power feeder cable assembly of an engine alternator. This Directive introduces actions intended to prevent interference and chafing between the alternator power feeder cables and adjacent structure, which could result in an electrical short circuit and consequent fire ignition source in the engine compartment.
Eugene Paul Holzapfel
Delegate of the Civil Aviation Safety Authority 19 May 2000
The above AD is notified in the Commonwealth of Australia Gazette on 14 June 2000.
Overview
The Civil Aviation Regulations 1998, established by the Australian Parliament, serve to maintain the safety and efficiency of civil aviation within Australia. Within this extensive regulatory framework, Part 39 specifically addresses airworthiness directives to ensure the continued safety of aircraft. The Airworthiness Directive issued under this Act, specifically AD/G1159/38, was enacted in 2000 in response to an incident reported by the United States Federal Aviation Administration involving an in-flight engine fire on a Gulfstream G-IV series aeroplane. This incident was caused by chafing of the engine alternator feeder cable, which could potentially lead to an electrical short circuit and subsequent fire. The directive aims to mitigate this risk by requiring specific modifications to the alternator feeder cables of affected aircraft, thereby enhancing the overall safety of these aeroplanes in service. The directive is intended to be implemented within 150 flight hours after its effective date, ensuring that necessary safety measures are taken without unduly disrupting ongoing flight operations.
Scope and Application
The Airworthiness Directive (AD) issued under subregulation 39.1(1) of the Civil Aviation Regulations 1998 specifically applies to Gulfstream (Grumman) G1159 and G-IV series aeroplanes, focusing on those with serial numbers ranging from 1000 to 1404 inclusive. The directive mandates specific modifications to the engine alternator feeder cables in order to address an identified unsafe condition that could lead to an electrical short circuit and potential in-flight engine fire. The modifications include replacing and rerouting the alternator power feeder cables, installing additional brackets and clamps, and ensuring specific actions are taken based on the serial number range of the aircraft. The compliance timeframe is set at 150 flight hours after the effective date of the directive, which is 13 July 2000. The directive does not apply to any actions already completed on the aircraft prior to the effective date of this directive unless they are not already addressed. This AD extends its regulatory reach to ensure safety compliance and is applicable across the Commonwealth of Australia, aligning with the broader regulatory framework established by the Civil Aviation Safety Authority.
Key Provisions
The Civil Aviation Regulations 1998, particularly Part 39 - 105, under the Civil Aviation Safety Authority's (CASA) Schedule of Airworthiness Directives, mandates specific actions for certain aircraft to ensure airworthiness. In this instance, the Airworthiness Directive (AD) AD/G1159/38 (subsection 39.1(1)) pertains to Gulfstream (Grumman) G1159 and G-IV series aeroplanes, specifically those with serial numbers ranging from 1000 through 1404 inclusive. The directive was issued to address an unsafe condition identified by the CASA delegate, which involved the engine alternator feeder cables potentially causing in-flight engine fires due to chafing and electrical shorts.
The directive requires modifications to the alternator feeder cables for these aircraft. For aeroplanes with serial numbers 1000 through 1384, both the left and right engines must have the alternator power feeder cables replaced and rerouted, and additional brackets and clamps must be installed. For aeroplanes with serial numbers 1385 through 1404, the right engine must have a bracket and spacer installed and the alternator feeder cables rerouted. These actions must be completed in accordance with Gulfstream IV Customer Bulletin No. 112 and Gulfstream IV Aircraft Service Change (ASC) No. 410. Notably, any actions previously undertaken on these aircraft do not need to be repeated unless they have not been completed in line with this directive.
The obligations imposed by this AD mandate that the specified modifications be completed within 150 flight hours after the effective date of the directive, which is 13 July 2000. Non-compliance with this AD could result in the aircraft being deemed unairworthy, leading to potential grounding and other regulatory repercussions. The directive is designed to prevent the recurrence of engine fires by eliminating potential interference and chafing between the alternator power feeder cables and adjacent aircraft structures.
Failure to adhere to the requirements set out in this AD may lead to significant consequences, including enforcement actions by CASA. These can include fines, penalties, or other civil or criminal sanctions as deemed appropriate by the regulatory body. The severity of these consequences underscores the importance of complying with the AD to ensure the safety and airworthiness of the affected aircraft.