2002-21-05: Upper and lower wing spar doublers

2002-21-05 Revo, Incorporated: Amendment 39-12911; Docket No. 2002- CE-40-AD. (a) What airplanes are affected by this AD? This AD applies to the model and serial number airplanes in paragraph (a)(1) of this AD and that incorporate any of the wing spar part numbers (or FAA- approved equivalent part numbers) specified in paragraph (a)(2) of this AD: (1) Affected Airplanes: This following model and serial number airplanes, certificated in any category, are affected by this AD: Model Serial Nos. Lake LA-4 Lake LA-4A Lake LA-4P Lake LA-4-200 Lake Model 250 246 through 421, 423 through 429, 445, and 446. 244 and 245 121. 422, 430 through 444, and all serial numbers after 446. 1 through 232. (2) Wing Spar Part Numbers Incorporated: The following specifies the part numbers of the wing spars that are installed on the affected airplanes: Wing spar parts Part Nos. Upper Spar Cap Angles Lower Spar Cap Angles Upper Spar Doublers Lower Spar Doublers 2-1610-015 and 2-1610-016 2-1610-075 and 2-1610-076. 2-1610-061 and 2-1610-081 and 2-1610-065 2-1610-063 and 2-1610-083. (b) Who must comply with this AD? Anyone who wishes to operate any of the airplanes identified in paragraph (a) of this AD must comply with this AD. (c) What problem does this AD address? The actions specified by this AD are intended to prevent wing spar failure caused by cracks in the wing spar doublers or angles, which could result in the wing separating from the airplane with consequent loss of control. (d) What must I do to address this problem? To address this problem, you must accomplish the following actions: Actions Compliance (1) Inspect the wing spar doublers and spar cap angles for cracks from the root end to the outboard of the wing attachment fittings, as follows: (i) From inside the wheel well, clean the upper and lower wing spar doublers and adjoining structure to the paint. Use a detergent or mineral-based solvent(ii) Use a strong light source and a 3x magnifying glass to inspect the exposed areas of the upper and lower spar doublers and adjoining structure for cracks. Use a mirror to inspect the exposed edge of the spar cap angle behind the doubler (2) Replace any doubler or angle found cracked during the inspection required by paragraphs (d)(1), (d)(1)(i), and (d)(1)(ii) of this AD. Replace with new parts that incorporate the same part numbers or FAA-approved equivalent part numbers. (3) Report the results of the inspection to the FAA at the address specified in paragraph (f) of this AD. Use the inspection report that is included as Figure 1 of this AD. The Office of Management and Budget (OMB) approved the information collection requirements contained in this regulation under the provisions of the Paperwork Reduction Act of 1980 (44 U.S.C. 3501 et seq.) and assigned OMB Control Number 2120-0056. Upon accumulating 25 hours time- in-service (TIS) after incorporating Modification B-79 or FAA-approved equivalent (the modification required by AD 2000-10-22) or within the next 10 hours TIS after October 23, 2002 (the effective date of this AD), whichever occurs later, unless already accomplished after accumulating 25 hours TIS after incorporating the modification required by AD 2000-10-22. Prior to further flight after the inspection. Within 7 days after the the inspection required by this AD or 7 days after October 23, 2002 (the effective date of this AD), whichever occurs later. Figure 1 to AD 2002-21-05--Inspection Report Report the following information to: Manager, Boston Aircraft Certification Office, Engine And Propeller Directorate, Aircraft Certification Service, Federal Aviation Administration, 12 New England Executive Park, Burlington, MA 01803-5299, Fax: (781) 238- 7170. Operator/Repair Station----------------------------------------------- Aircraft Model-------------------------------------------------------- Aircraft S/N---------------------------------------------------------- Date of Inspection---------------------------------------------------- Aircraft Time-in Service (TIS): Total----------------------------------------------------------------- Since installation of AD 2000-10-22 Kit------------------------------- Note: Add additional pages for the following for each part inspected. Part No.-------------------------------------------------------------- Inspection Pass------------------------------------------------------------------ Fail------------------------------------------------------------------ If a crack is found, indicate the approximate location on the part and the length of the crack in inches: Part Time-In Service (TIS) (Hours): Estimated------------------------------------------------------------- Actual---------------------------------------------------------------- Unknown--------------------------------------------------------------- (e) Can I comply with this AD in any other way? You may use an alternative method of compliance or adjust the compliance time if: (1) Your alternative method of compliance provides an equivalent level of safety; and (2) The Manager, Boston Aircraft Certification Office (ACO), approves your alternative. Submit your request through an FAA Principal Maintenance Inspector, who may add comments and then send it to the Manager, Boston ACO. Note: This AD applies to each airplane identified in paragraph (a) of this AD, 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 you have not eliminated the unsafe condition, specific actions you propose to address it. (f) Where can I get information about any already-approved alternative methods of compliance? Contact Mr. Richard B. Noll, Aerospace Engineer, FAA, Boston Aircraft Certification Office, 12 New England Executive Park, Burlington, Massachusetts 01803; telephone: (781) 238-7160; facsimile: (781) 238-7170. (g) What if I need to fly the airplane to another location to comply with this AD? The FAA can issue a special flight permit under sections 21.197 and 21.199 of the Federal Aviation Regulations (14 CFR 21.197 and 21.199) to operate your airplane to a location where you can accomplish the requirements of this AD. (h) When does this amendment become effective? This amendment becomes effective on October 23, 2002.