COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY
SCHEDULE OF AIRWORTHINESS DIRECTIVES
Bell Helicopter Textron 205 Series Helicopters
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/BELL 205/67 Main Hydraulic Servo Actuator
Rod End Lock Washer
9/2001
DM
Applicability: Model 205A-1 and model 205B helicopters incorporating hydraulic servo actuator, P/No 41105950, serial numbers (S/Nos) with “HR” prefix up to and including 490, or 41000470, S/Nos with “HR’ prefix up to and including 10010.
Requirement: 1. Inspect the tab on the rod end locking washer of each hydraulic servo actuator for bending and twisting in accordance with “Accomplishment Instructions”, Paragraph 2.A of Bell Helicopter Textron, Inc Service Bulletin 205-00-79 or 205B-00-33 as applicable.
2. Replace P/No NAS513-6 lock washer with P/No NAS513K6C locking device in accordance with “Accomplishment Instructions”, Paragraph 2.B of Bell Helicopter Textron, Inc Service Bulletin 205-00-79 or 205B-00-33 as applicable.
Note: FAA AD 2001-08-04 refers.
Compliance: 1. Within 25 flight hours after the effective date of this Airworthiness Directive.
2. Within 100 flight hours after the effective date of this Airworthiness Directive or at next actuator overhaul, whichever occurs first.
This Airworthiness Directive becomes effective on 25 July 2001.
Background: This Directive is prompted by reports of damaged main hydraulic actuator rod end lock washers which can result in rod end disengagement from the actuator and potential for loss of control of the main rotor.
James Coyne
Delegate of the Civil Aviation Safety Authority 18 July 2001
The above AD is notified in the Commonwealth of Australia Gazette on 25 July 2001.
Overview
The Civil Aviation Regulations 1998 (CAR 1998) were enacted to regulate the safety and efficiency of civil aviation within Australia. Specifically, Part 39 - 105 of the Civil Aviation Regulations 1998 addresses the issue of airworthiness directives, which are regulatory measures intended to correct unsafe conditions in aircraft. The Civil Aviation Safety Authority (CASA) is the enforcing body of these regulations, with a mandate to ensure that all civil aviation activities are conducted in a safe and orderly manner. This particular Airworthiness Directive (AD/BELL 205/67) was introduced in response to reports of damaged main hydraulic actuator rod end lock washers on Bell Helicopter Textron 205 Series Helicopters, which posed a risk of loss of control. The policy objective is to mitigate this risk by requiring inspections and replacements of specific components in the helicopters.
Scope and Application
The Airworthiness Directive (AD) specified in Part 39 of the Civil Aviation Regulations 1998 applies to certain models of Bell Helicopter Textron 205 Series helicopters, specifically model 205A-1 and model 205B helicopters. The AD is targeted at aircraft incorporating a hydraulic servo actuator with the part number 41105950 and serial numbers with the "HR" prefix up to and including 490, or 41000470 with the "HR" prefix up to and including 10010. The directive mandates specific actions to rectify a condition that has been identified as unsafe. These actions include inspecting the rod end lock washer of each hydraulic servo actuator for any signs of bending or twisting and replacing the NAS513-6 lock washer with a NAS513K6C locking device. The directive outlines compliance timelines, requiring the inspection to be completed within 25 flight hours and the replacement within 100 flight hours from the effective date or at the next actuator overhaul, whichever comes first. This AD is a regulatory measure under the authority of the Civil Aviation Safety Authority (CASA) and its delegate, designed to ensure the safety of the specified aircraft models by addressing the identified safety concern.
Key Provisions
The Civil Aviation Regulations 1998, specifically Part 39 - 105, incorporates Airworthiness Directives (ADs) that mandate specific actions to ensure aircraft safety. Under subregulation 39.1 (1), the Civil Aviation Safety Authority (CASA) issues ADs to correct identified unsafe conditions. The referenced AD, AD/BELL 205/67, pertains to the Bell Helicopter Textron 205 Series Helicopters and requires the inspection and replacement of specific components of the main hydraulic servo actuator. This is aimed at preventing potential loss of control of the main rotor due to damaged rod end lock washers.
The AD applies to Model 205A-1 and 205B helicopters with specified serial numbers and hydraulic servo actuator part numbers. Specifically, it covers helicopters with a "HR" prefix in their serial numbers up to 490 or 41000470, and "HR" prefix up to 10010. The AD mandates two main actions: firstly, inspecting the tab on the rod end locking washer of each hydraulic servo actuator for bending and twisting, and secondly, replacing the P/No NAS513-6 lock washer with the P/No NAS513K6C locking device. These actions must be performed according to the instructions provided in the relevant Bell Helicopter Textron Service Bulletins, 205-00-79 or 205B-00-33, as applicable.
The AD imposes compliance requirements, stipulating that the specified inspections and replacements must be completed within 25 flight hours after the effective date of the AD, which is 25 July 2001. Furthermore, the AD requires that the replacement of the locking device must be carried out within 100 flight hours after the effective date of the AD or at the next actuator overhaul, whichever comes first. Failure to adhere to these requirements could result in unsafe conditions, potentially leading to loss of control of the main rotor.
Failure to comply with the requirements of the AD may have significant consequences. Non-compliance could result in the aircraft being deemed unairworthy, which could lead to grounding until the necessary actions are taken. Additionally, the AD references FAA AD 2001-08-04, indicating that similar directives have been issued by other aviation authorities. Any breaches of these requirements may also result in enforcement actions by CASA, potentially including fines, penalties, or other regulatory measures. The specific penalties are not detailed in the AD but could be significant given the safety implications of non-compliance.