Overview

The Civil Aviation Safety Authority Airworthiness Directive AD/BELL 212/64 was enacted in 2002 in response to reports of accidents and failures involving the vertical fin spar cap of Bell 212 Series Helicopters. The directive was issued by the Civil Aviation Safety Authority (CASA) to address the unsafe conditions identified in the vertical fin spar caps, which included fatigue cracks, loose rivets, disbonding of doublers, and corrosion. The policy objective of this Airworthiness Directive is to enhance aviation safety by mandating additional inspection and maintenance requirements for the affected helicopters, ultimately ensuring the airworthiness of the aircraft in service. The directive requires modification and visual inspections of the vertical fin spar caps, repairs for any detected issues, and replacement of certain spar caps with specified parts. Compliance with the directive must be achieved within specified timeframes after its issuance, with ongoing inspection intervals to maintain safety standards.

Scope and Application

This Airworthiness Directive issued by the Civil Aviation Safety Authority (CASA) applies to Bell 212 Series Helicopters equipped with specific vertical fin spar caps. The directive mandates that the actions detailed in the requirement section must be carried out on the specified aircraft or aeronautical products under particular circumstances and at designated times. These requirements include modifying, inspecting, repairing, or replacing the vertical fin spar caps to prevent unsafe conditions related to cracks, loose fasteners, corrosion, or disbonding. The directive applies nationally within the Commonwealth of Australia and becomes effective from 30 October 2002. It sets specific timeframes for compliance, with different intervals based on whether the helicopter has already met the requirements or not. The directive also notes exclusions, such as tailbooms with certain part numbers, and specifies that replacement of the affected spar caps terminates further compliance with this directive. The AD references related FAA directives and provides comprehensive instructions based on the Bell Helicopter Textron Alert Service Bulletin and Technical Bulletin.

Key Provisions

The Airworthiness Directive (AD) issued by the Civil Aviation Safety Authority (CASA) under subregulation 39.1 (1) of the Civil Aviation Regulations 1998 (CAR 1998) mandates specific actions to address the identified unsafe conditions in certain Bell 212 series helicopters. The AD applies to model 212 helicopters with vertical fin spar caps of certain part numbers, with or without retrofit kits installed (sections 1-2). The directive requires the modification and visual inspection of each spar cap for cracks, loose fasteners, and corrosion, with specific steps outlined in the Bell Helicopter Textron Alert Service Bulletin (ASB) No. 212-00-110 Revision A. The actions depend on whether the spar cap has been modified by the retrofit kit. For unmodified spar caps, inspections must be conducted in accordance with Part I (A1), paragraphs 1, 2, 3, 4, 6, and 7, followed by Part I (A2), paragraphs 1, 2, 3, 5, and 6. For modified spar caps, inspections must be conducted in accordance with Part II (A1), paragraphs 1, 2, 3, 4, 5, 7, 8, 9, and 10, followed by Part II (A2), paragraphs 1, 2, 3, 5, and 6. Additionally, spar caps must be inspected for disbonding using a hammer as per Part II (B), paragraphs 1 through 13, and then fluorescent penetrant inspected according to Part II (C1), paragraphs 1 through 8, and 10 through 12, followed by Part II (C2), paragraphs 1 through 9, and 11 through 14. Any loose fasteners or corrosion must be repaired, and any cracked or disbonded spar caps must be replaced with serviceable ones before further flight. Finally, each affected spar cap must be replaced with a cold expansion spar cap, P/N 212-030-447-117S, following the instructions in Bell Helicopter Textron Technical Bulletin No.212-00-184, Revision A. The AD imposes specific obligations on the operators of Bell 212 series helicopters, requiring them to conduct the specified inspections and modifications within particular time frames. For example, inspections and modifications for unmodified spar caps must be completed within 25 hours of time in service after 30 October 2002, unless already accomplished, and thereafter at intervals not to exceed 8 hours time in service. For modified spar caps, the inspections and modifications must be completed within 50 hours of time in service after 30 October 2002, unless already accomplished, and thereafter at intervals not to exceed 300 hours time in service for some inspections and 8 hours for others. Fluorescent penetrant inspections must be conducted within 50 hours of time in service after 30 October 2002, unless already accomplished, and thereafter at intervals not to exceed 300 hours time in service. The replacement of affected spar caps with cold expansion spar caps must be completed within 24 months after 30 October 2002. Failure to comply with these obligations can lead to significant safety risks, including the potential for structural failure of the vertical fin, which could result in accidents. Failure to comply with the requirements of the Airworthiness Directive may result in civil or criminal penalties. Under CAR 1998, non-compliance with airworthiness directives can lead to significant civil penalties, including fines and potential grounding of the aircraft until compliance is achieved. Additionally, individuals or entities found to have violated the AD may face criminal charges, particularly if their non-compliance directly contributed to an accident or other safety incident. The specific penalties for such violations are not detailed in the AD itself but are governed by the broader regulatory framework under which the AD operates. This includes potential criminal penalties under the Civil Aviation Act 1988 and associated regulations, which can include fines and imprisonment for serious breaches. The precise penalties would depend on the severity of the non-compliance and its impact on aviation safety.