93-23-04 SOCIETE NATIONALE INDUSTRIELLE AEROSPATIALE AND EUROCOPTER FRANCE: Amendment 39-8738. Docket Number 93-SW-02-AD.
Applicability: Model SE 3160, SA 315B, SA 316B, SA 316C, and SA 319B series helicopters equipped with main rotor blades, part number (P/N) LOM3160-100 installed in accordance with Supplemental Type Certificate (STC) No. SH778GL, certificated in any category.
Compliance: Required within 25 hours' time-in-service after the effective date of this airworthiness directive (AD), unless accomplished previously.
To prevent excessive main rotor vibrations that could result in failure of rotor system components, and subsequent loss of control of the helicopter, accomplish the following:
(a) Install an outside air temperature (OAT) and velocity never exceed (VNE) airspeed limitation flip chart placard, P/N LOM3160-151, on top of the instrument panel immediately to the right of the existing VNE placard, using velcro strips as described in Les "Blades"De L'Helicoptere, Ltd. Service Information Letter No. 1-11-92A, dated December 3, 1992.
(b) After compliance with paragraph (a) of this AD, operate the helicopter in accordance with the Helicopter Flight Manual Supplement, approved and dated November 25, 1992, that is applicable to helicopters modified in accordance with STC SH778GL.
(c) An alternate method of compliance or adjustment of the compliance time, which provides an acceptable level of safety, may be used when approved by the Manager, Los Angeles Aircraft Certification Office, FAA, Transport Airplane Directorate, 3229 East Spring Street, Long Beach, California 90806-2425. Operators shall submit their requests through an FAA Principal Maintenance Inspector, who may concur or comment and then send it to the Manager, Los Angeles Aircraft Certification Office.
NOTE: Information concerning the existence of approved alternative methods of compliance with this AD, if any, may be obtained from the Manager, Los Angeles Aircraft Certification Office.
(d) Special flight permits may be issued in accordance with FAR 21.197 and 21.199 to operate the helicopter to a location where the requirements of this AD can be accomplished, provided the indicated airspeed is limited to no more than 50 knots.
(e) The installation shall be done in accordance with Les "Blades" de l'Helicoptere, Ltd. Service Information Letter No. 1-11-92A, dated December 3, 1992. 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 Les "Blades" de l'Helicoptere, Ltd., 5132 Greencrest Road, La Canada Flintridge, California 91011. Copies may be inspected at the FAA, Office of the Assistant Chief Counsel, 4400 Blue Mound Road, bldg. 3B, room 158, Fort Worth, Texas 76106; or at the Office of the Federal Register, 800 North Capitol Street, NW., suite 700, Washington, DC.
(f) This amendment becomes effective February 17, 1994.