98-24-34: Blades

98-24-34 Hamilton Standard: Amendment 39-10920. Docket 98-ANE-59-AD. Applicability: Hamilton Standard Models 54H60-77, -91, -117, -123, and -125 propellers, with propeller blades identified by serial number (S/N) in Hamilton Standard Alert Service Bulletin (ASB) No. 54H60-61-A134, Revision 1, dated June 24, 1998, and ASB No. 54H60-61-A135, dated June 24, 1998, . These propellers are installed on but not limited to Lockheed L100, L188, L200, L288, L382, C130, P-3, and General Dynamics (Convair) CV580 and Guppy aircraft. Note 1: This airworthiness directive (AD) applies to each propeller 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 propellers that have been modified, altered, or repaired so that the performance of the requirements of this AD is affected, the owner/operator must request approval for an alternative method of compliance in accordance with paragraph (c) of this AD. The request should include an assessment of the effect of the modification, alteration, or repair on the unsafe condition addressed by this AD; and, if the unsafe condition has not been eliminated, the request should include specific proposed actions to address it. Compliance: Required as indicated, unless accomplished previously. To prevent propeller blade cracks due to incomplete cold rolling during manufacture, which can result in propeller blade separation and damage to the aircraft, accomplish the following: (a) Within 100 hours time in service (TIS) after the effective date of this AD, or prior to September 30, 2002, whichever occurs first, remove from service affected propeller blades identified by S/N in Hamilton Standard ASB No. 54H60-61-A135, dated June 24, 1998, and ship to designated repair facilities listed in that ASB for inspection, and, if necessary, repair. (b) For affected propeller blades identified by S/N inASB No. 54H60-61-A134, Revision 1, dated June 24, 1998, remove from service and ship to designated repair facilities listed in that ASB for inspection, and, if necessary, repair, after the effective date of this AD, in accordance with paragraphs (b)(1) and (b)(2) of this AD, or prior to September 30, 2002, whichever occurs first. (1) Remove from service within 100 hours TIS propellers that have greater than 4,400 hours time since overhaul (TSO), or for propellers that have never been overhauled remove from service propellers that have greater than 4,400 hours time since new (TSN). (2) For propellers with less than 4,400 hours (TSO) remove from service prior to accumulating 4,500 hours TSO, or for propellers with less than 4,400 hours TSN that have never been overhauled remove from service prior to accumulating 4,500 hours TSN. (c) An alternative method of compliance or adjustment of the compliance time that provides an acceptable level of safety may be used if approvedby the Manager, Boston Aircraft Certification Office. Operators shall submit their requests through an appropriate FAA Principal Maintenance Inspector, who may add comments and then send it to the Manager, Boston Aircraft Certification Office. Note 2: Information concerning the existence of approved alternative methods of compliance with this airworthiness directive, if any, may be obtained from the Boston Aircraft Certification Office. (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 aircraft to a location where the requirements of this AD can be accomplished. (e) The actions required by this AD shall be done in accordance with the following Hamilton Standard ASBs: Document No. Pages Revision Date 54H60-61-A134 1-5 1 June 24, 1998 Total pages: 5. 54H60-61-A135 1-10 Original June 24, 1998 Total pages: 10. 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 Hamilton Standard, Publications Distribution Group, One Hamilton Rd., Windsor Locks, CT 06096-1010; telephone (860) 654-6876, fax (860) 654-6906. Copies may be inspected at the FAA, New England Region, Office of the Regional Counsel, 12 New England Executive Park, Burlington, MA; or at the Office of the Federal Register, 800 North Capitol Street, NW., suite 700, Washington, DC. (f) This amendment becomes effective on December 18, 1998.