Summary
The FAA proposes to supersede Airworthiness Directive (AD) 2005-26-53; Amendment 39-14451, which applies to all Pacific Aerospace Corporation Ltd. (PAC) 750XL airplanes. AD 2005-26-53 currently requires you to insert text into the Limitations Section of the Airplane Flight Manual (AFM) that reduces the maximum takeoff weight from 7,500 pounds to 7,125 pounds. This proposed AD results from mandatory continuing airworthiness information (MCAI) issued by the airworthiness authority for New Zealand and the FAA's decision that the actions correct an unsafe condition. Consequently, this proposed AD would require you to remove rivets that have not been fully age hardened and replace them with bolts, washers, and nuts in specific locations where reduction in rivet strength affects overall structural capability. This proposed AD retains the actions of the previous AD until the rivets are replaced with the bolts, washers, and nuts. We are issuing this proposed AD so that wing ultimate load requirements are met. If wing ultimate load requirements are not met, wing failure could result with subsequent loss of control of the airplane.