COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY
SCHEDULE OF AIRWORTHINESS DIRECTIVES
Beechcraft 1900 Series Aeroplanes
AD/BEECH 1900/12 Pneumatic Air System Plumbing 11/95
Applicability: This Directive is applicable to the following aircraft:
Model Serial Numbers
1900 UA-2 and UA-3
1900C UB-1 through UB-74 and UC-1 through UC-174
1900C (C12J) UD-1 through UD-6
1900D UE-2 through UE-115
Requirement: Modify the plumbing of the pneumatic air system in accordance with the instructions provided with the following Beechcraft kits and as specified in the applicable Beechcraft Mandatory Service Bulletin:
Models | Kit Number | Service Bulletin |
1900 and 1900C | 118-9003-1 or 118-9003-3 | 2539 |
1900D | 129-9010-1 or 118-9010-3 | 2591 |
Note: FAA AD 95-14-02 Amdt 39-9294 refers and supersedes FAA AD 91-24-15 Amdt 39-8173.
Compliance: Within 1,000 hours time in service after 12 October 1995 or by 31 December 1997, whichever occurs first.
Background: This Directive supersedes and cancels AD/BEECH 1900/6 which mandated certain modification of the instrument/pneumatic air system. Following eight additional reports of moisture freezing in the pneumatic air system plumbing of Model 1900 and 1900C aircraft, fitted with the same modification as that required by AD/BEECH 1900/6, the FAA determined that further modifications were required. Recent testing of the Model 1900D by the FAA also indicates that the design of the pneumatic air system on these aircraft is also conducive to moisture freezing. Actions specified by this Directive are designed to prevent ice formation in the pneumatic air system, which, if not detected, could result in the vacuum for the deice boot operation being unavailable which could result in the subsequent loss of the aircraft.
Federal Register of Legislative Instruments F2006B03630
Overview
The Civil Aviation Regulations 1998, administered by the Civil Aviation Safety Authority (CASA), aim to ensure the safety and efficiency of civil aviation in Australia. One particular legislative instrument, F2006B03630, addresses the recurring issue of moisture freezing in the pneumatic air systems of specific Beechcraft 1900 series aeroplanes, which posed a significant risk to flight safety. Enacted to mandate modifications to the plumbing of the pneumatic air system, this directive is part of the broader schedule of airworthiness directives under Part 39 of the Civil Aviation Regulations 1998. The policy objective is to mitigate the risk of ice formation in the pneumatic air systems, which could otherwise lead to the unavailability of the vacuum required for deice boot operations, potentially resulting in the loss of the aircraft. This directive applies to certain serial numbers of Beechcraft 1900, 1900C, 1900C (C12J), and 1900D models and requires compliance within specific timeframes to ensure ongoing airworthiness.
Scope and Application
The Civil Aviation Regulations 1998, specifically under PART 39 - 105, mandates the applicability of Airworthiness Directives (ADs) concerning the maintenance and operation of aircraft to ensure safety and compliance with aviation standards. This particular directive, AD/BEECH 1900/12, applies to Beechcraft 1900 Series aeroplanes, including models 1900, 1900C, 1900C (C12J), and 1900D, with specific serial number ranges outlined in the legislation. The directive is applicable to any aircraft owner, operator, or maintenance organisation within the Commonwealth of Australia, ensuring that the modifications to the pneumatic air system plumbing are implemented to prevent moisture freezing, which could compromise aircraft safety. Compliance with the directive is mandatory, with the requirement to modify the plumbing within 1,000 hours time in service after 12 October 1995, or by 31 December 1997, whichever is earlier. The directive cancels previous mandates and supersedes AD/BEECH 1900/6, reflecting the most current safety standards and requirements.
Key Provisions
The Civil Aviation Regulations 1998, under Part 39 - 105, include a directive (AD/BEECH 1900/12) concerning the modification of the pneumatic air system plumbing for specific Beechcraft 1900 series aeroplanes. This directive is applicable to the Beechcraft 1900, 1900C, 1900C (C12J), and 1900D models, as specified in the serial number ranges mentioned (paragraph 1). The requirement is to modify the plumbing of the pneumatic air system in accordance with the Beechcraft kits and service bulletins detailed (paragraph 2). The directive mandates compliance within 1,000 hours of time in service after 12 October 1995, or by 31 December 1997, whichever comes first (paragraph 3).
The obligations imposed by this directive include ensuring that the specified Beechcraft 1900 series aeroplanes undergo the necessary modifications to their pneumatic air system plumbing. Owners and operators of these aircraft must adhere to the requirements outlined in the Beechcraft kits and service bulletins, which are intended to prevent moisture freezing in the pneumatic air system that could potentially lead to hazardous conditions during flight. The directive is clear that compliance must be achieved within the stipulated timeframe, which is contingent on either the aircraft reaching 1,000 hours of operational time post-October 1995 or the absolute deadline of 31 December 1997, whichever occurs sooner.
Failure to comply with the requirements of AD/BEECH 1900/12 could result in significant safety risks, including the potential for ice formation in the pneumatic air system. Such non-compliance could lead to the unavailability of the vacuum required for the deice boot operation, thereby increasing the risk of aircraft loss. Although the specific civil or criminal penalties are not detailed in the legislative instrument provided, non-compliance with airworthiness directives typically results in severe consequences under the Civil Aviation Safety Authority (CASA) regulations. This may include fines, suspension or revocation of the aircraft's certificate of airworthiness, and other enforcement actions that could affect the operator's ability to legally operate the aircraft.