AD/JETSTREAM/52 - Escape Hatch Shear Fitting

Overview

The Civil Aviation Regulations 1998, specifically within Part 39 - 105, introduced the Airworthiness Directives for British Aerospace BAe 3100 (Jetstream) Series Aeroplanes to address safety concerns identified during routine inspections. Enacted by the Parliament of the Commonwealth of Australia, this legislation aims to ensure the airworthiness of aircraft by mandating compliance with specific service bulletins and maintenance requirements. One such directive, AD/JETSTREAM/52, pertains to the escape hatch shear fitting, requiring corrective action to prevent interference that could impede the removal of the escape hatch during an emergency. This directive was introduced in response to an issue where the escape hatch could not be removed without damaging the ceiling trim, highlighting a critical safety gap that needed to be addressed to ensure passenger safety and compliance with international standards.

Scope and Application

The Civil Aviation Regulations 1998, specifically Part 39 - 105, address the safety directives for certain aircraft, including the British Aerospace BAe 3100 (Jetstream) Series aeroplanes. This legislation applies to Jetstream Series 3100 and 3200 aircraft with specific constructor's numbers identified in Accomplishment Instruction Parts of BAe Service Bulletin 52-JM 7752. The Jetstream Series 3100 aircraft must meet the criteria of constructor's numbers 757 and those in the range of 770 to 839 inclusive, while Jetstream Series 3200 aircraft must fall within constructor's numbers 790 to 910 inclusive and 912. The regulation mandates compliance with the Mandatory British Aerospace Service Bulletin 52-JM 7752, requiring action to be taken at the next scheduled 600-hour maintenance check following 6 March 1992 or by 6 July 1992, whichever comes first. This directive aims to ensure the escape hatch shear fittings do not interfere with the ceiling trim, thus preventing potential damage and ensuring the hatch can be removed without issue in an emergency. The regulation extends the UK Civil Aviation Authority's compliance date by two months to provide additional time for compliance.

Key Provisions

The Civil Aviation Regulations 1998, specifically under Part 39 - 105, establish the Civil Aviation Safety Authority's (CASA) schedule of airworthiness directives, which include the British Aerospace BAe 3100 (Jetstream) Series Aeroplanes AD/JETSTREAM/52. This directive (sections 39-105) concerns the escape hatch shear fitting and applies to certain models and constructor’s numbers of Jetstream aircraft. The directive mandates compliance with Mandatory British Aerospace Service Bulletin 52-JM 7752, which addresses the issue of hatch interference with the ceiling trim that can impede emergency escape. Aircraft owners and operators must ensure compliance with this directive at the next scheduled 600-hour maintenance check following 6 March 1992, or by 6 July 1992, whichever is sooner. The obligations imposed by this directive require aircraft owners and operators to strictly adhere to the actions outlined in the British Aerospace Service Bulletin 52-JM 7752. This involves inspecting and potentially modifying the escape hatch shear fitting to eliminate interference with the ceiling trim, ensuring that the escape hatch can be removed without damage in an emergency. Operators must also ensure that all required maintenance and modifications are completed within the specified timeframe to maintain the aircraft's airworthiness. Failure to comply with this airworthiness directive can result in serious consequences. If an aircraft is found to be non-compliant during an inspection, it may be grounded until the necessary modifications are made. Additionally, operators who fail to adhere to the specified compliance dates may face enforcement actions from CASA. While the Civil Aviation Regulations do not explicitly state penalties for non-compliance with airworthiness directives, the broader regulatory framework allows for substantial fines, legal action, and potential criminal charges for serious breaches that result in safety hazards. The seriousness of the issue addressed by this directive—ensuring that escape hatches can be opened in emergencies—underscores the importance of strict compliance.