82-08-04: Elevator Horn Assembly

82-08-04 VARGA AIRCRAFT CORPORATION (Morissey): Amendment 39-4362. Applies to Models 2150A and 2180 (S/Ns VAC 50 thru VAC 181) airplanes, certificated in any category. COMPLIANCE: Required as indicated, unless already accomplished. To prevent failure of the elevator horn assembly which will result in loss of elevator control, accomplish the following: A) Prior to further flight after the effective date of this AD and thereafter before the first flight of each day: 1) Conduct a visual inspection using a 4X glass of the radius of the P/N VAC 6000L-65 (steel) elevator horn to elevator attach flanges, particularly in the side adjacent to the balance weights. 2) Conduct a visual check of the radius of the P/N VAC 6000J-32 or P/N VAC 6000K-32 (aluminum) elevator horn to elevator attach flanges, particularly in the side opposite the balance weights. 3) The pre-flight checks required by paragraph A)2) of this AD may be performed by the holder of a pilotcertificate issued under Part 61 of the Federal Aviation Regulations on any airplane owned or operated by that person that is not used in air carrier service. Record compliance with the AD by an appropriate entry in the airplane maintenance records as required by FAR 91.173. B) If any cracks are found, prior to further flight, replace with like serviceable part and continue the inspections/checks required by this AD or replace with P/N VAC 30400-100 elevator horn/balance arm assembly in accordance with paragraph C) of this AD. C) On or before June 12, 1982, replace P/N VAC 6000J-32, P/N VAC 6000K-32 and P/N 6000L-65 with P/N VAC 30400-100 elevator horn/balance arm assembly in accordance with Varga Aircraft Corporation Service Instruction SI 0024 dated February 22, 1982. When this is accomplished, the special inspections/checks required by this AD are no longer applicable. D) Special flight permits may be issued in accordance with FAR 21.197 to operate aircraft to a base for the accomplishment of inspections or modifications required by this AD. E) Any alternate means of compliance with this AD may be used when approved by the Chief, Western Aircraft Certification Field Office, P.O. Box 92007, Worldway Postal Center, Los Angeles, California 90009; telephone (213) 536-6352. This AD supersedes Amendment 39-4213 (46 FR 46123), AD 81-17-05 and priority letter AD 81-21-07 dated October 7, 1981. This Amendment 39-4362 becomes effective on April 15, 1982.