Federal Aviation Administration May 9, 2014 – Federal Register Recent Federal Regulation Documents

We propose to supersede airworthiness directive (AD) 2006- 0707, for certain A300 B4-600, B4-600R, and F4-600R series airplanes, and Model C4-605R variant F airplanes (collectively called A300-600 series airplanes). AD 2006-0707 requires modifying nine bolt holes in the vertical flange of the center spar sealing angles. Since we issued AD 2006-0707, we have received reports that fatigue and damage tolerance analyses show that the inspection threshold and interval must be reduced to allow timely detection of cracks. This proposed AD would continue to require modification of bolt holes in the vertical flange of the center spar sealing angles, and any applicable related investigative and corrective actions. This proposed AD would also require inspections for cracks, a modification by cold expansion of the center spar sealing angles, replacement of both sealing angles and cold expansion of the attachment holes if necessary, and post-repair repetitive inspections and corrective actions if necessary. We are proposing this AD to prevent crack formation in the sealing angles, which could rupture the sealing angle and lead to subsequent crack formation in the bottom skin of the wing, and result in reduced structural integrity of the center spar section of the wing.

We are adopting a new airworthiness directive (AD) for certain GROB-WERKE Models G115EG and G120A airplanes. This AD results from mandatory continuing airworthiness information (MCAI) issued 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 cracks in the left hand elevator flange. We are issuing this AD to require actions to address the unsafe condition on these products.

This action amends a typographical error in the effective date of a final rule technical amendment correction published in the Federal Register of February 6, 2014, that amends Class D and E airspace in the Grand Forks, ND, area. The effective date year is corrected from February 6, 2013, to February 6, 2014.

We are superseding Airworthiness Directive (AD) 2009-21-08 R1 for Piaggio Aero Industries S.p.A Model P-180 airplanes. This AD results from mandatory continuing airworthiness information (MCAI) issued 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 cases of un-commanded operation of switched off nose-wheel steering system caused by internal leakage of a steering select/bypass valve. We are issuing this AD to require actions to address the unsafe condition on these products.