AIRWORTHINESS DIRECTIVE
For the reasons set out in the background section, the CASA delegate whose signature appears below revokes Airworthiness Directive AD/SD3-60/62 and issues the following 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.
Short SD3-60 Series Aeroplanes
AD/SD3-60/62
Amdt 1
Engine Intake Anti-Icing Vane Annunciator
1/2003
Applicability: All SD3-60 series aeroplanes.
Requirement: 1. Modify the central warning panel (CWP) in accordance with Bombardier Aerospace Shorts Brothers PLC Service Bulletin (SB) SD360-31-06 Revision 1 dated 29 October 2002.
2. Ensure the relevant Aircraft Flight Manual (AFM) amendment is embodied as follows:
AFM
Doc.No.SB.4.2
Doc.No.SB.4.3
Doc.No.SB.4.4
Doc.No.SB.4.5
Doc.No.SB.4.6
Doc.No.SB.4.7
Doc.No.SB.4.8
Doc.No.SB.4.9 Doc.No.SB.4.10 Doc.No.SB.4.11 Doc.No.SB.4.12
Amendment
P/30 P/32 P/13
P/9 P/20 P/21 P/19 P/22 P/15
P/4 P/4
Note: This Service Bulletin has been classified as ‘Mandatory’ by the CAA(UK).
Compliance: For Requirement 1 - At the next ‘C’ check or before 31 March 2003, whichever occurs earlier.
For Requirement 2 - Concurrent with Requirement 1. This Amendment becomes effective on 23 January 2003.
Background: Short Brothers PLC has advised that a number of in flight engine shut downs, whilst flying in icing conditions, have been reported where failure to deploy the engine intake anti- icing vanes (inertial separators) has been cited as a contributory factor.
Short SD3-60 Series Aeroplanes
AD/SD3-60/62 Amdt 1 (continued)
The original issue of this Directive introduced a modification to the CWP, which provided a new annunciator light to alert the pilot that the intake anti- icing vanes have not been deployed, when other anti- icing systems have been selected. The Directive also ensured that the relevant AFM ‘P’ amendment is embodied.
This Amendment introduces a revised SB which corrects wiring anomalies contained in the original SB and requires reworking of installations completed in accordance with the original SB.
The original issue of this Airworthiness Directive became effective on 5 September 2002.
James Coyne
Delegate of the Civil Aviation Safety Authority 28 November 2002
The above AD is notified in the Commonwealth of Australia Gazette on 18 December 2002.
Overview
The Civil Aviation Safety Authority (CASA) issued the Airworthiness Directive (AD) SD3-60/62 Amendment 1 in 2002 under the Civil Aviation Regulations 1998 (CAR 1998). This AD was introduced in response to incidents where Short Brothers PLC reported in-flight engine shut downs during icing conditions, attributed partly to failures in deploying the engine intake anti-icing vanes. The policy objective of this AD is to ensure the safety of SD3-60 series aeroplanes by mandating specific modifications to the central warning panel and corresponding updates to the Aircraft Flight Manual. The directive requires that modifications be made by the next ‘C’ check or before 31 March 2003, whichever comes first, and that the relevant Aircraft Flight Manual amendments are implemented concurrently. This legislative instrument aims to address safety concerns and prevent future incidents related to the deployment of engine intake anti-icing vanes.
Scope and Application
The Airworthiness Directive AD/SD3-60/62 Amdt 1 applies to all SD3-60 series aeroplanes, specifically targeting the engine intake anti-icing system. This directive was issued under the authority of the Civil Aviation Safety Authority (CASA) delegate, James Coyne, and became effective on 23 January 2003. It revokes the previous directive AD/SD3-60/62 and mandates modifications to the central warning panel (CWP) to include a new annunciator light to alert pilots when the intake anti-icing vanes are not deployed. Furthermore, it requires the incorporation of specific amendments to the Aircraft Flight Manual (AFM) to ensure pilots are properly informed about the modifications. Compliance with these requirements must be achieved at the next ‘C’ check or before 31 March 2003, whichever occurs first. This directive extends across the Commonwealth of Australia and was published in the Commonwealth of Australia Gazette on 18 December 2002. The directive does not specify exclusions or exemptions but focuses on ensuring the airworthiness of the SD3-60 series aeroplanes by addressing safety concerns related to in-flight engine shut downs due to anti-icing system failures.
Key Provisions
This Airworthiness Directive (AD) applies to all SD3-60 series aeroplanes and mandates specific modifications to enhance safety. The AD requires that the central warning panel (CWP) be modified in accordance with Bombardier Aerospace Shorts Brothers PLC Service Bulletin (SB) SD360-31-06 Revision 1 dated 29 October 2002 (section 1). Additionally, the relevant Aircraft Flight Manual (AFM) amendment must be incorporated as specified in the directive (section 2). These modifications are designed to address a reported issue where engine intake anti-icing vanes have failed to deploy, contributing to in-flight engine shut downs in icing conditions.
To comply with this AD, operators of SD3-60 series aeroplanes must ensure that the CWP modification is completed at the next 'C' check or before 31 March 2003, whichever comes first (section 1). Concurrently, the AFM amendment must also be implemented (section 2). This compliance timeframe ensures that the safety measures are enacted promptly to mitigate the risk of engine shut downs due to anti-icing vane failures.
Failure to comply with the requirements set out in this AD may result in serious safety implications, as the directive is classified as 'Mandatory' by the Civil Aviation Safety Authority (CASA). Non-compliance could potentially lead to severe operational disruptions and safety hazards, given the history of engine shut downs associated with the failure to deploy anti-icing vanes. The AD imposes strict obligations on aircraft operators to adhere to the specified modifications and updates to the AFM.
In summary, the AD mandates specific modifications to the CWP and AFM amendments for SD3-60 series aeroplanes to prevent engine shut downs due to anti-icing vane failures. Operators must complete the modifications by the specified compliance dates, and failure to do so could result in significant safety risks. The directive's mandatory classification underscores the importance of timely and accurate compliance.