AIRWORTHINESS DIRECTIVE
For the reasons set out in the background section, the CASA delegate whose signature appears below revokes Airworthiness Directive (AD) AD/BN-2/57 Amdt 1 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.
Pilatus Britten-Norman BN-2 Series Aeroplanes
AD/BN-2/57
Amdt 2
Engine Air Intake Hose 5/2002
Applicability: All BN-2 series aircraft fitted with Textron Lycoming IO-540 series engines and not fully incorporating modification NB-M-1615 “Alternative Air Intake Hose”.
Requirement: 1. Carry out a visual inspection of the engine air intake hose in accordance with B- N Group Ltd. Service Bulletin (SB) Number SB 95 - Issue 5.
2. Replace a defective air intake hose in accordance with B-N Group Ltd. SB Number SB 95- Issue 5.
Note: B-N Group Ltd Service Bulletin SB 95-Issue 5 has been declared mandatory by the CAA(UK).
Compliance: 1. Unless previously accomplished in accordance with a previous issue of this Directive, within 5 hours time in service effective 16 May 2002 and thereafter at intervals not to exceed 60 hours time in service.
2. Before further flight.
This Amendment becomes effective on 16 May 2002.
Background: This Directive was originally issued to require an inspection of the engine air intake hose. The requirement followed reports of engine power loss events resulting from failure of the air intake hose. This amendment reflects the aircraft manufacturer's revision of the requirement document. The revision, in part, provides a terminating action. Aircraft incorporating the alternative air intake hose on both engines are not subject to the requirements of this Directive.
Pilatus Britten-Norman BN-2 Series Aeroplanes
AD/BN-2/57 Amdt 2 (Continued)
The original issue of this Airworthiness Directive became effective on 24 January 1996.
Amendment 1 of this Directive became effective on 14 August 1996.
Eugene Paul Holzapfel
Delegate of the Civil Aviation Safety Authority 7 April 2002
The above AD is notified in the Commonwealth of Australia Gazette on 24 April 2002.
Overview
The Airworthiness Directive (AD) issued under the Civil Aviation Act 1988 addresses safety concerns related to the engine air intake hose of the Pilatus Britten-Norman BN-2 Series Aeroplanes. Specifically, the AD, AD/BN-2/57 Amdt 2, was enacted in response to reports of engine power loss due to air intake hose failures. The Civil Aviation Safety Authority (CASA), acting as the delegate of the Commonwealth of Australia, issued this directive to mandate corrective actions to mitigate the identified unsafe condition. The policy objective is to ensure that all applicable aircraft are maintained to a standard that ensures their airworthiness, thereby protecting public safety. This directive became effective on 16 May 2002, requiring a visual inspection and replacement of defective air intake hoses according to the manufacturer's service bulletin, which has been declared mandatory by the Civil Aviation Authority (UK).
Scope and Application
This legislative instrument issued by the Civil Aviation Safety Authority (CASA) concerns an Airworthiness Directive (AD) for the Pilatus Britten-Norman BN-2 Series Aeroplanes, specifically those fitted with Textron Lycoming IO-540 series engines and which have not fully incorporated modification NB-M-1615, referred to as the "Alternative Air Intake Hose". The AD, which amends a previous directive, mandates certain actions to address an identified unsafe condition. It applies to all relevant BN-2 series aircraft and is effective within the Commonwealth of Australia. The AD requires a visual inspection and the replacement of defective engine air intake hoses in accordance with specific service bulletins issued by the B-N Group Ltd. The directive stipulates that these actions must be completed within 5 hours of time in service from the effective date of the AD and thereafter at intervals not exceeding 60 hours of time in service, or before further flight if the inspection has not been completed previously. The AD is subject to the regulatory framework under the Civil Aviation Regulations 1998 and its enforcement extends to ensuring compliance with the specified safety measures to mitigate the risk of engine power loss due to air intake hose failure.
Key Provisions
The Airworthiness Directive (AD) AD/BN-2/57 Amdt 2 applies to all Pilatus Britten-Norman BN-2 series aircraft that are fitted with Textron Lycoming IO-540 series engines and have not fully incorporated modification NB-M-1615, which involves an alternative air intake hose. The directive was issued to address safety concerns following reports of engine power loss due to failure of the engine air intake hose. The main requirements of the directive include conducting a visual inspection of the engine air intake hose as per BN Group Ltd. Service Bulletin (SB) Number SB 95 - Issue 5, and replacing any defective air intake hose in accordance with the same service bulletin. Notably, this service bulletin has been declared mandatory by the UK's Civil Aviation Authority (CAA).
Operators of the affected aircraft must ensure that the visual inspection and any necessary replacement of the air intake hose are carried out within specific timeframes. According to the compliance section of the directive, the inspection must be performed within five hours of the aircraft's time in service, effective from 16 May 2002, and thereafter at intervals not exceeding 60 hours of time in service. Additionally, the inspection and replacement must be completed before any further flight. The directive emphasises that aircraft that have already fully incorporated the alternative air intake hose modification on both engines are exempt from these requirements.
Failure to comply with the AD could result in serious safety issues, potentially leading to engine power loss during flight. While the directive does not explicitly outline specific penalties for non-compliance, failure to adhere to airworthiness directives can result in significant civil and criminal consequences under the Civil Aviation Safety Regulations 1998. These may include fines, imprisonment, or both, depending on the severity of the breach and the discretion of the court. The exact penalties would be determined in accordance with the relevant provisions of Australian law, which govern the enforcement of civil aviation safety regulations.