2004-21-01: Attach bolts

2004-21-01 Hartzell Propeller Inc. (formerly Hartzell Propeller Products Division): Amendment 39-13822. Docket No. 86-ANE-7. Supersedes AD 86-06-02, Amendment 39-5259. Effective Date (a) This airworthiness directive (AD) becomes effective October 19, 2004. Affected ADs (b) This AD supersedes AD 86-06-02. Applicability (c) This AD applies to Hartzell Propeller Inc. (formerly Hartzell Propeller Products Division) Model HC-B5MP-3( )/M10282A( )+6 five-bladed propellers installed on, Aerospatiale (Nord) Model 262A airplanes modified by Supplemental Type Certificate (STC) SA2369SW, and Short Brothers Ltd. Model SD3-30 airplanes. Unsafe Condition (d) This AD results from four reports in the last 8 months of eleven cracked or failed Hartzell propeller attach bolts, part number (P/N) B-3339, on Short Brothers Model SD3-30 airplanes. The actions specified in this AD are intended to prevent propeller separation from the airplane. (e) You are responsiblefor having the actions required by this AD performed within the compliance times specified unless the actions have already been done. Torque Check Requirements for Short Brothers Ltd. Model SD3-30 Airplanes (f) Before further flight, for propellers installed on Short Brothers Ltd. Model SD3-30 airplanes, do the following: (1) Perform an initial torque check inspection of the Hartzell propeller attach bolts, P/N B-3339, unless already done within 120 hours time-in-service (TIS) before the effective date of this AD, and thereafter, within 120 hour TIS intervals since the last inspection. Use Procedure 1 "Mounting Bolt Torque Check" of Hartzell Alert Service Bulletin (ASB) A203A, dated January 5, 1995, to do the inspections. (2) If the torque check fails, remove the propeller and go to paragraph (h) of this AD. Torque Check Requirements for Aerospatiale (Nord) Model 262A Airplanes Modified by STC SA2369SW (g) For propellers installed on Aerospatiale (Nord) Model 262A airplanes modified by STC SA2369SW, do the following: (1) Perform an initial torque check inspection of the Hartzell propeller attach bolts, P/N B-3339, within 100 hours TIS after the effective date of this AD, and thereafter, within 100 hour TIS intervals since the last inspection. Use Procedure 1 "Mounting Bolt Torque Check" of Hartzell Alert Service Bulletin (ASB) A203A, dated January 5, 1995, to do the inspections. (2) If the torque check fails, remove the propeller and go to paragraph (h) of this AD. Inspection and Rework of Engine and Propeller Mounting Flange Surfaces and Hub Mounting Bolt Holes (h) When the propeller is removed due to failing the torque check in Procedure 1 of Hartzell ASB A203A, dated January 5, 1995, inspect and rework if necessary, the engine and propeller mounting flange surfaces. Use Procedure 2 "Engine/ Propeller Mounting Flanges" of Hartzell ASB A203A, dated January 5, 1995, to do the inspections and rework. Also inspect the hubmounting bolt holes as follows: (1) Clean bolt holes using Stoddard solvent or equivalent and a soft bristle brush. (2) Visually inspect the area around the bolt holes. No deformations, evidence of rework, depressions, or protrusions around bolt holes are permitted, except for an edge chamfer of the bolt hole up to 0.030 inch. (3) Using a 10X magnification, and an appropriate light source, visually inspect threads for chipping, missing material, deformation, and scratches. No damage is permitted. (4) Using a new P/N B-3339 bolt, check threads by threading bolt by hand into the bolt hole. The bolt must thread in easily with no binding. (5) Any hub with a bolt hole showing one or more of the prohibited conditions specified in paragraphs (h)(2) through (h(4) must be removed from service. Preparation of Propeller Attach Bolts (i) Before installing any Hartzell propeller attach bolt P/N B- 3339, apply anti-seize compound MIL-PRF-83483, to the threaded surfaces of the attach bolt. Do not use any other anti-seize compound on attach bolts. Preparation of Propeller Mounting and Engine Flanges (j) Before installing a Hartzell HC-B5MP-3( )/M10282A( )+6 propeller, the propeller mounting flange and engine flange must be clean and dry. Do not use anti-fretting compounds on the flanges. You may install an FAA-approved Pratt & Whitney shim between the propeller mount flange and engine flange. Alternative Methods of Compliance (k) The Manager, Chicago Aircraft Certification Office, has the authority to approve alternative methods of compliance for this AD if requested using the procedures found in 14 CFR 39.19. Special Flight Permits (l) Under 14 CFR part 39.23, special flight permits are prohibited. Material Incorporated by Reference (m) You must use Hartzell Alert Service Bulletin A203A, dated January 5, 1995, to perform the procedures referenced by this AD. The Director of the Federal Register approved the incorporation by reference of this service bulletin in accordance with 5 U.S.C. 552(a) and 1 CFR part 51. You can get a copy from Hartzell Propeller Inc. Technical Publications Department, One Propeller Place, Piqua, OH 45356; telephone (937) 778-4200; fax (937) 778-4391. You may review copies at the FAA, New England Region, Office of the Regional Counsel, 12 New England Executive Park, Burlington, MA; or 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 . Related Information (n) Information on propeller removal and installation procedures can be found in Hartzell Propeller Inc. Service Instruction 140A.