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 CASR 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.
Cessna 525 Series Aeroplanes
AD/CESSNA 525/4 Electric Pitch Trim Printed Circuit Board 10/2004
Applicability: Model 525 aeroplanes with the serial numbers 525- 0001, 525-0002, 525-0004
through 525-0359 inclusive.
Requirement: 1. If not accomplished previously, replace the elevator trim printed circuit board (PCB) assembly part number (P/N) 6518351-3, 6518351-5 or 6518351-8 with a PCB assembly P/N 6518351-10 in accordance with the Accomplishment Instructions of Cessna Citation Service Bulletin SB525-27-17 dated 9 December 2003 by either:
- Modifying the 6518351-8 trim PCB assembly to a 6518351-10 trim PCB assembly, or
b. Replacing any 6518351-3 or 6518351-5 trim PCB assembly with a 6518351- 10 (EX) trim PCB assembly.
2. Remove any tie strap (P/N MS3367-1- 4 or equivalent P/N) on the AP SERVOS and PITCH TRIM circuit breakers. (Required by either AD/CESSNA 525/3 original issue or Amdt 1.)
3. Trim PCB assembly P/N 6518351-8, 6518351-3 or 6518351-5 may not be installed on any aeroplane as a replacement part.
Note: FAA AD 2004-14-20 Amdt 39-13729 refers.
Compliance: For Requirement 1 - Within the next two years after the effective date of this Directive or 300 hours time-in-service after the effective date of this Directive, whichever occurs first.
For Requirement 2 - Before further flight after Requirement 1 is accomplished. For Requirement 3 - As of the effective date of this Directive.
This Airworthiness Directive becomes effective on 30 September 2004.
Cessna 525 Series Aeroplanes
AD/CESSNA 525/4 (continued)
Background: This Directive complements AD/CESSNA 525/3 Amdt 1, which required inhibition of the autopilot operation but allowed the installation of a trim PCB assembly P/N 6518351-8 as a temporary optional terminating action. This Directive requires the trim PCB assembly to be replaced providing a final terminating action for the autopilot inhibition.
Gary J Carr
Delegate of the Civil Aviation Safety Authority 19 August 2004
The above AD is notified in the Commonwealth of Australia Gazette on 8 September 2004.
Overview
The Airworthiness Directive issued under the Civil Aviation Safety Authority Act 1998 (CASA Act) on 19 August 2004 addresses safety concerns associated with the Cessna 525 Series Aeroplanes, specifically targeting the electric pitch trim printed circuit board (PCB) assembly. This legislative instrument, referred to as F2006B08413, aims to rectify an unsafe condition that could potentially compromise the airworthiness of the specified aircraft models. The directive mandates specific actions to be taken by aircraft owners and operators, including the replacement of certain PCB assemblies and the removal of tie straps from the autopilot servos and pitch trim circuit breakers. The policy objective is to ensure that the aircraft meet the necessary safety standards and to prevent any unsafe conditions that could endanger flight operations.
The directive was issued by the Civil Aviation Safety Authority (CASA), a body established under the CASA Act to oversee aviation safety in Australia. CASA’s role in issuing this Airworthiness Directive is to implement regulatory measures that ensure compliance with the Civil Aviation Safety Regulations 1998 (CASR). By enforcing this directive, CASA aims to mitigate any potential risks associated with the identified unsafe condition, thereby enhancing the overall safety of aviation in Australia.
Scope and Application
This Airworthiness Directive (AD) applies specifically to the Cessna 525 Series aeroplanes with serial numbers ranging from 525-0001 to 525-0359 inclusive. The AD mandates the replacement of the elevator trim printed circuit board (PCB) assembly with a specific part number and the removal of certain tie straps from the aeroplanes' AP SERVOS and PITCH TRIM circuit breakers. This directive applies nationwide across Australia under the jurisdiction of the Civil Aviation Safety Authority (CASA). The AD is effective as of 30 September 2004, and compliance deadlines are set for specific actions within two years or 300 hours of time-in-service after the directive's effective date, whichever comes first. This legislation ensures the airworthiness of the specified aircraft by addressing identified safety concerns related to the trim PCB assembly and autopilot operation.
Key Provisions
The Airworthiness Directive (AD) AD/CESSNA 525/4 issued by the Civil Aviation Safety Authority (CASA) mandates specific actions to be taken for certain Cessna 525 series aeroplanes to address safety concerns. The AD applies to Model 525 aeroplanes with serial numbers ranging from 525-0001 through 525-0359 inclusive. The directive outlines specific requirements that must be adhered to, including replacing the elevator trim printed circuit board (PCB) assembly with a specified part number, removing tie straps from certain circuit breakers, and prohibiting the installation of specific PCB assemblies on any aeroplane as a replacement part.
Under this directive, operators of the affected Cessna 525 aeroplanes must ensure that the elevator trim PCB assembly part numbers 6518351-3, 6518351-5, or 6518351-8 are replaced with a PCB assembly P/N 6518351-10. This replacement must be carried out either by modifying the existing 6518351-8 trim PCB assembly to a 6518351-10 trim PCB assembly or by replacing any 6518351-3 or 6518351-5 trim PCB assembly with a 6518351-10 (EX) trim PCB assembly, following the Accomplishment Instructions of Cessna Citation Service Bulletin SB525-27-17 dated 9 December 2003. Additionally, operators must remove any tie strap (P/N MS3367-1-4 or equivalent P/N) on the AP SERVOS and PITCH TRIM circuit breakers. The removal of these tie straps is mandated by either the original AD/CESSNA 525/3 issue or Amendment 1. Furthermore, the AD prohibits the installation of the PCB assemblies P/N 6518351-8, 6518351-3, or 6518351-5 on any aeroplane as a replacement part.
The directive sets specific timelines for compliance. For the replacement of the trim PCB assembly (Requirement 1), the action must be completed within the next two years after the effective date of this Directive or 300 hours of time-in-service after the effective date, whichever occurs first. For the removal of tie straps (Requirement 2), this must be done before any further flight after Requirement 1 is accomplished. Requirement 3, prohibiting the installation of certain PCB assemblies, must be adhered to as of the effective date of this Directive. Failure to comply with these requirements can result in significant safety risks, and enforcement actions may be taken against non-compliant operators.
In terms of penalties and consequences, while the AD itself does not explicitly state penalties for non-compliance, CASA has the authority to take enforcement actions under the Civil Aviation Act 1988 and the Civil Aviation Regulations 1988. Non-compliance with ADs can lead to enforcement actions, including fines, suspension or revocation of airworthiness certificates, and other regulatory sanctions. Operators found in breach of these requirements may face legal consequences, including civil penalties and criminal charges, depending on the severity of the non-compliance and its impact on aviation safety.