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97-12-06 CESSNA AIRCRAFT COMPANY: Amendment 39-10070; Docket No. 97-CE-35- AD. \n\tApplicability: Model 172R airplanes, serial numbers 17280001 through 17280081, certificated in any category. \n\n\tNOTE 1: This AD applies to each airplane 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 airplanes 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 (e) 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. \n\n\tCompliance: Required as indicated in the body of this AD, unless already accomplished, except to those operators receiving this action by priority letter issued June 6, 1997, which made these actions effective immediately upon receipt. \n\n\tTo prevent the cowling from rubbing against the gascolator drain valve or the tailpipe, which could result in fuel loss and engine stoppage, accomplish the following: \n\n\t(a)\tPrior to further flight after the effective date of this AD, check the clearance between both the gascolator and cowling area and the tailpipe and cowling area for evidence of rubbing. \n\n\t\t(1)\tIf any evidence of rubbing is found, prior to further flight, modify both the gascolator and cowling area and tailpipe and cowling area in accordance with Cessna Service Bulletin SB97-28-01, dated June 6, 1997. \n\n\t\t(2)\tIf no evidence of rubbing is found, repeat the check in paragraph (a) before each flight, and within the next 10 hours time-in-service (TIS) after the effective date of this AD, modify the gascolator and cowling area in accordance with Figure 1 of this AD. \n\n\t(b)\tModifying both the gascolator and cowling area and tailpipe and cowling area in accordance with Cessna Service Bulletin SB97-28-01, dated June 6, 1997, satisfies all the requirements of this AD, and may be accomplished in place of the check required by paragraph (a) of this AD. \n\n\t(c)\tThe check required by paragraph (a) of this AD may be performed by the owner/operator holding at least a private pilot certificate as authorized by section 43.7 of the Federal Aviation Regulations (14 CFR 43.7), and must be entered into the aircraft records showing compliance with this AD in accordance with section 43.11 of the Federal Aviation Regulations (14 CFR 43.11). \n\n\t(d)\tSpecial 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 airplane to a location to accomplish the modification requirements of this AD provided no evidence of rubbing is found during thecheck required by paragraph (a) of this AD. \n\n\t\t(1)\tIf evidence of rubbing is found in either the gascolator to cowling area or the tailpipe to cowling area during the check required by paragraph (a) of this AD, then no special flight permits will be granted. \n\n\t\t(2)\tPrior to any flight granted through a special flight permit, the check required by paragraph (a) of this AD must be accomplished again to assure that no evidence of rubbing exists in either the gascolator to cowling area or the tailpipe to cowling area. If evidence of rubbing is found in either the gascolator to cowling area or the tailpipe to cowling area, then the special flight permit is not valid. \n\n\t(e)\tAn alternative method of compliance or adjustment of the compliance time that provides an equivalent level of safety may be approved by the Manager, Wichita Aircraft Certification Office (ACO), 1801 Airport Road, Room 100, Mid-Continent Airport, Wichita, Kansas 67209. The request shall be forwarded through an appropriate FAA Maintenance Inspector, who may add comments and then send it to the Manager, Wichita ACO. \n\n\tNOTE 2: Information concerning the existence of approved alternative methods of compliance with this AD, if any, may be obtained from the Wichita ACO. \n\n\t(f)\tThe modifications required by this AD (if evidence of rubbing is found) shall be done in accordance with Cessna Service Bulletin SB97-28-01, dated June 6, 1997. 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 the Cessna Aircraft Company, Product Support, P.O. Box 7706, Wichita, Kansas 67277. Copies may be inspected at the FAA, Central Region, Office of the Assistant Chief Counsel, Room 1558, 601 E. 12th Street, Kansas City, Missouri, or at the Office of the Federal Register, 800 North Capitol Street, NW., suite 700, Washington, DC. \n\n\t(g)\tThis amendment (39-10070) becomes effective on July 15, 1997, to all persons except those persons to whom it was made immediately effective by priority letter AD 97-12-06, issued June 6, 1997, which contained the requirements of this amendment. \n\nFigure 1
