Safety Rules and Regs

Air Safety Week, May 19, 2008

SUMMARY: We propose to adopt a new airworthiness directive (AD) for the products listed above. This proposed AD results from mandatory continuing airworthiness information (MCAI) originated by an aviation authority of another country to identify and correct an unsafe condition on an aviation product.

Airworthiness Directives; Air Tractor, Inc. AT-400, AT-500, AT-600, and AT-800 Series Airplanes Final rule. SUMMARY: We are adopting a new airworthiness directive (AD) to supersede AD 2007-13-17, which applies to certain Air Tractor, Inc. (Air Tractor) Models AT-602, AT-802, and AT-802A airplanes. AD 2007-13-17 currently requires you to repetitively inspect the engine mount for any cracks, repair or replace any cracked engine mount, and report any cracks found to the FAA. Since we issued AD 2007-13-17, Air Tractor has learned of a Model AT-502B with a crack located where the lower engine mount tube is welded to the engine mount ring. In addition, Air Tractor has developed gussets that, when installed according to their service letter, terminate the repetitive inspection requirement. Consequently, this AD would retain the inspection actions of AD 2007-13-17 for Model AT-602, AT-802, and AT-802A airplanes, including the compliance times and effective dates; establish new inspection actions for the AT-400 and AT-500 series airplanes; incorporate a mandatory terminating action for all airplanes; and terminate the reporting requirement of AD 2007- 13-17. We are issuing this AD to detect and correct cracks in the engine mount, which could result in failure of the engine mount. Such failure could lead to separation of the engine from the airplane.

Integration of Operations Control Centers into Helicopter Emergency Medical Services Operations AC No: 120-96 This advisory circular (AC) provides recommendations to assist helicopter emergency medical services (HEMS) operators with the development, implementation and integration of an Operations Control Center (OCC) and enhanced operational control procedures.

Airworthiness Directives; BAE Systems (Operations) Limited (Jetstream) Model 4101 Airplanes SUMMARY: We propose to adopt a new airworthiness directive (AD) for the products listed above. This proposed AD results from mandatory continuing airworthiness information (MCAI) originated by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as: Resulting from the assessment of fuel tank wiring installations required by SFAR 88 (Special Federal Aviation Regulation 88) and equivalent JAA/EASA (Joint Aviation Authorities/European Aviation Safety Agency) policy, BAE Systems identified two features in the Jetstream 4100 where the need for design changes was apparent. ***Insufficient or defective bonding in the fuel tank area, if not corrected, could lead to ignition of fuel vapours and subsequent fuel tank explosion.

Removal of Regulations Allowing for Polished Frost on Wings of Airplanes Notice of proposed rulemaking (NPRM). SUMMARY: The FAA is proposing to remove provisions in its regulations that allow for operations with "polished frost" (i.e., frost polished to make it smooth) on the wings of airplanes operated under parts 125, 135, and certain airplanes operated under part 91. The rule would increase safety by not allowing operations with polished frost, which the FAA has determined increases the risk of unsafe flight.