Airworthiness directives › 97-26-09
AD 97-26-09 Airworthiness Directives; Agusta S.p.A. Model A109K2 Helicopters
Models named: A109K2. Read the applicability below — it usually turns on serial or part numbers too.
Applicability*9
Model A109K2 helicopters with main transmission assembly, part number (P/N) 109-0400-03, serial number (S/N) 005, 006, 007, 008, 010, 011, 012, 013, 014, 015, 016, 017, 018, 020, 022, 024, 027, 030, 031, 032, 033, 034, 035, 038, 039, 042, 047, 048, A2/1053, A2/1073, 2/1397, or B54895 e C347, installed, certificated in any category. Note 1: This AD applies to each helicopter identified in the preceding applicability provision, regardless of whether it has been modified, altered, or repaired in the area subject to the requirements of this AD. For helicopters that have been modified, altered, or repaired so that the performance of the requirements of this AD is affected, the owner/operator must use the authority provided in paragraph (c) to request approval from the FAA. This approval may address either no action, if the current configuration eliminates the unsafe condition, or different actions necessary to address the unsafe condition described in this AD. Such a request should include an assessment of the effect of the changed configuration on the unsafe condition addressed by this AD. In no case does the presence of any modification, alteration, or repair remove any helicopter from the applicability of this AD.
Compliance
Required as indicated, unless accomplished previously. To prevent failure of the main transmission Gleason crown (Gleason crown), failure of the main transmission and subsequent loss of control of the helicopter, accomplish the following: (a) Within 50 hours time-in-service (TIS) after the effective date of this AD, and thereafter at intervals not to exceed 300 hours TIS, perform a magnetic particle inspection of the Gleason Crown, P/ N 109-0403-07, for cracks in accordance with steps 1 through 3 of Part II of the Compliance Instructions of Agusta Bollettino Tecnico (Technical Bulletin) No. 109K-16, dated April 24, 1997. (b) If any crack is found, remove the Gleason crown and replace it with an airworthy Gleason crown, P/N 109-0403-07-103, S/N B58264 through S/N B58270, or S/N B58272 and subsequent (S/N B58271 is not an acceptable replacement part), and vibro-etch the main transmission tag with ``S.M. 109-25094''. Replacement of the Gleason crown with an airworthy Gleason crown, P/N 109-0403-07-103, S/N B58264 through S/N B58270 or S/N B58272 and subsequent, constitutes a terminating action for the requirements of this AD. (c) An alternative method of compliance or adjustment of the compliance time that provides an acceptable level of safety may be used if approved by the Manager, Rotorcraft Standards Staff, Rotorcraft Directorate, FAA. Operators shall submit their requests through an FAA Principal Maintenance Inspector, who may concur or comment and then send it to the Manager, Rotorcraft Standards Staff. Note 2: Information concerning the existence of approved alternative methods of compliance with this AD, if any, may be obtained from the Rotorcraft Standards Staff. (d) Special flight permits may be issued in accordance with sections 21.197 and 21.199 of the Federal Aviation Regulations (14 CFR 21.197 and 21.199) to operate the helicopter to a location where the requirements of this AD can be accomplished. (e) The inspections and replacement shall be done in accordance with Agusta Bollettino Tecnico (Technical Bulletin) No. 109K-16, dated April 24, 1997. This incorporation by reference was approved by the Director of the Federal Register in accordance with 5 U.S.C. 552(a) and 1 CFR part 51. Copies may be obtained from Agusta S.p.A., 21017 Cascina Costa di Samarate (VA), Via Giovanni Agusta 520, telephone (0331) 229111, fax (0331) 229605-222595. Copies may be inspected at the FAA, Office of Regional Counsel, Southwest Region, 2601 Meacham Blvd., Room 663, Fort Worth, Texas 76137; or at the Office of the Federal Register, 800 North Capitol Street, NW., suite 700, Washington, DC. (f) This amendment becomes effective on January 2, 1998. Note 3: The subject of this AD is addressed in Registro Aeronautico Italiano (Italy) AD 97-122, dated April 29, 1997. Issued in Fort Worth, Texas, on December 9, 1997. Larry M. Kelly, Acting Manager, Rotorcraft Directorate, Aircraft Certification Service. [FR Doc. 97-32992 Filed 12-16-97; 8:45 am] BILLING CODE 4910-13-U
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The directive text above is reproduced from the Federal Register, a work of the United States government and in the public domain. The separation into applicability, compliance and required actions is TrackAD's.*1