This airplane model is manufactured in Switzerland and is type certificated for operation in the United States under the provisions of Sec. Pursuant to this bilateral airworthiness agreement, the FOCA of Switzerland has kept the FAA informed of the situation described above. The proposed AD would require replacing all flap drive shafts with flap drive shafts of improved design, installing additional gaskets on the power drive unit, and modifying the attachment and supporting hardware. Accomplishment of the proposed action would be required in accordance with Pilatus Service Bulletin No. 27-003, dated March 8, 1999. The unsafe condition specified by the proposed AD is caused by corrosion.
Corrosion can occur regardless of whether the aircraft is being operated.
The regulations proposed herein would not have substantial direct effects on the States, on the relationship between the national government and the States, or on the distribution of power and responsibilities among the various levels of government. Therefore, in accordance with Executive Order 12612, it is determined that this proposal would not have sufficient federalism implications to warrant the preparation of a Federalism Assessment. A copy of the draft regulatory evaluation prepared for this action has been placed in the Rules Docket. List of Subjects in 14 CFR Part 39 Air transportation, Aircraft, Aviation safety, Safety. Required as indicated in the body of this AD, unless already accomplished.