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Airworthiness directives › 2005-13-17

AD 2005-13-17 Airworthiness Directives; Agusta S.p.A. Model AB412 Series Helicopters

2005-07-11
2005-06-24
39-14154
FAA-2005-21589
Airframe
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Models named: AB412 Series. Read the applicability below — it usually turns on serial or part numbers too.

Applicability*9

Model AB412 Series helicopters, with a tail rotor blade (blade), part number (P/N) 212-010-750-All, having a serial number (S/N) with a prefix of “A” or “A-FS” and number 11530 through 13618, except numbers 13595 through 13602, installed, certificated in any category.

Compliance

Within 100 hours time-in-service, unless accomplished previously. To prevent loss of the forward tip weight retention block (tip block) or aft tip closure (tip closure), loss of a blade, and subsequent loss of control of the helicopter, accomplish the following: (a) Inspect the tip block and tip closure for voids. Before further flight, remove any blade with a void in excess of that allowed by the Component Repair and Overhaul Manual limitations. (b) Inspect the tip block attachment countersink screws in four locations to determine if the head of each countersunk screw is flush with the surface of the abrasion strip and the skin. The location of these four screws is depicted on Figure 2 of Agusta Bollettino Tecnico No. 412-88, Revision A, dated August 17, 2004 (BT 412-88, Revision A). If any of these screws are set below the surface of the abrasion strip or are covered with filler material, before further flight, install shear pins by following the Accomplishment Instructions, Part A, Tip Block: Shear Pin Installation, paragraphs 1 through 3, of BT 412-88, Revision A. (c) Install the tip closure rivets on all affected blades by following the Accomplishment Instructions, Part B, Aft Tip Closure: Rivet Installation, paragraphs 1 through 6, of BT 412-88, Revision A. (d) To request a different method of compliance or a different compliance time for this AD, follow the procedures in 14 CFR 39.19. Contact the Safety Management Group, FAA, for information about previously approved alternative methods of compliance. (e) The inspections and modification must be done by following the specified portions of Agusta Bollettino Tecnico No. 412-88, Revision A, dated August 17, 2004. The Director of the Federal Register approved this incorporation by reference in accordance with 5 U.S.C. 552(a) and 1 CFR part 51. Copies may be obtained from Agusta, 21017 Cascina Costa di Samarate (VA) Italy, Via Giovanni Agusta 520, telephone 39 (0331) 229111, fax 39 (0331) 229605-222595. Copies may be inspected at the National Archives and Records Administration (NARA). For information on the availability of this material at NARA, call 202-741-6030, or go to: http://www.archives.gov/federal_register/code_of_federal_regulations/ibr_locations.html. (f) This amendment becomes effective on July 11, 2005. Note: The subject of this AD is addressed in Ente Nazionale per l'Aviazione Civile (Italy) AD 2004-351, dated September 3, 2004. Issued in Fort Worth, Texas, on June 8, 2005. S. Frances Cox, Acting Manager, Rotorcraft Directorate, Aircraft Certification Service. [FR Doc. 05-12419 Filed 6-23-05; 8:45 am] BILLING CODE 4910-13-P

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