AD 89-14-01

89-14-01 TELEDYNE CONTINENTAL MOTORS (TCM): Amendment 39-6308. Final Rule of priority letter AD. Applicability: TCM Model TSIO-520BE engines (Serial Numbers 528001 through 528337) certificated in any category. Engines which have had the crankcase split and inspected and new bearings installed, since the accomplishment of AD 87-26-08, are exempt from the requirements of this AD. Compliance: Required as indicated, unless already accomplished. To prevent the possible loss of engine power, accomplish the following: (a) Prior to further flight and at intervals not to exceed 25 hours time-in-service, accomplish the crankshaft end play check in accordance with Section A of TCM Service Bulletin (SB) M89-14, dated June 29, 1989. If the crankshaft has no end play, the engine must be removed from service. (b) Prior to further flight, accomplish the thru-bolt torque check in accordance with Section B of TCM SB M89-14, dated June 29, 1989. If the force required to rotate the propeller is not within the range specified or if the force required to rotate the propeller after retorquing has changed from the previous value by more than 3 pounds or if the crankshaft has no end play, the engine must be removed from service. (c) Prior to further flight and at intervals not to exceed 200 hours time-in-service, accomplish the visual inspection of the number two crankcase main bearing in accordance with Section C of TCM SB M89-14, dated June 29, 1989. If there is any indication of bearing shift within the crankcase or crankshaft fillet/bearing contact or mismatch of bearing halves at the case split line, the engine must be removed from service. (d) The repetitive checks and inspections required by paragraphs (a) and (c) of this AD may be discontinued when the crankcase has been split and inspected and new bearings are installed. (e) Make appropriate log book entry showing compliance with this AD and record results of crankshaft end play and pounds required to rotate propeller. (f) Aircraft may be ferried in accordance with the provisions of Federal Aviation Regulations 21.197 and 21.199 to a base where this AD can be accomplished. (g) Upon submission of substantiating data by an owner or operator through an FAA Airworthiness Inspector, the Manager, Atlanta Aircraft Certification Office, Small Airplane Directorate, Aircraft Certification Service, Federal Aviation Administration, 1669 Phoenix Parkway, Suite 210C, Atlanta, Georgia 30349, may approve an equivalent means of compliance or an adjustment of the compliance time schedule specified in this AD, which provides an equivalent level of safety. The checks and inspections shall be done in accordance with TCM SB M89-14, dated June 29, 1989. 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 Teledyne Continental Motors, P.O. Box 90, Mobile, Alabama 36601. Copies may beinspected at the Regional Rules Docket, Office of the Assistant Chief Counsel, Federal Aviation Administration, New England Region, 12 New England Executive Park, Room 311, Burlington, Massachusetts 01803, or at the Office of the Federal Register, 1100 L Street, Room 8301, Washington, D.C. 20591. This amendment (39-6308, AD 89-14-01) becomes effective on September 22, 1989, as to all persons except those persons to whom it was made immediately effective by priority letter AD No. 89-14-01 issued on June 30, 1989, which contained this amendment.