2007-17-08: Hub

2007-17-08 DG Flugzeugbau GmbH and Glaser-Dirks Flugzeugbau GmbH: Amendment 39-15166; Docket No. FAA-2007-28610; Directorate Identifier 2007-CE-058-AD. Effective Date (a) This airworthiness directive (AD) becomes effective September 10, 2007. Affected ADs (b) None. Applicability (c) This AD applies to Models DG-500MB and DG-800B gliders, all serial numbers, that: (1) Have SOLO engine 2 625 01 equipped with optional slip-clutch sets, SOLO part number (P/N) 29 00 202, installed; or (2) Have SOLO engine 2 625 02 equipped with optional slip-clutch sets, SOLO P/N 29 00 202, installed; and (3) Are certificated in any category. Subject (d) Air Transport Association of America (ATA) Code 61: Propellers. Reason (e) The mandatory continuing airworthiness information (MCAI) states: Instead of the hub normally used which carries the starter ring gear and the hub for the tooth belt a slip-clutch can be mounted. The unit contains thehub for the tooth belt and the starter ring gear. Occurrences during service have shown that under bad conditions excessive wear on several parts of the clutch can occur. In order to avoid further damages the affected parts of the slip clutch on the engines SOLO 2 625 01 and SOLO 2 652 02 have to be inspected and replaced, if necessary. In order to check the condition of the clutch on all engines SOLO 2 625 in future, additional procedures are installed and additional inspection terms are introduced. The cover place in front of the slip clutch has to be replaced by a stronger plate with the No. 2042888. The original Emergency AD has now been revised to indicate that the initial inspection of the installed slip-clutch is required when 12.5 hours in operation have been accumulated. Actions and Compliance (f) Unless already done, do the following actions. (1) Before further flight after September 10, 2007 (the effective date of this AD): (i) Remove the cover plateof the slip-clutch; (ii) Inspect the friction pads for wear. Dimension in new condition is .335 inches (8.5 mm), the wear limit is .256 inches (6.5 mm); (iii) Inspect the slip-clutch shoes on the contact surface to the hub for wear. The wear limit is .039 inches (1 mm); (iv) Replace any parts found to be outside the wear limit; and (v) Assemble the slip-clutch with a new cover plate, P/N 2042888. (2) Every 12.5 hours time-in-service (TIS) after doing the actions required by paragraph (f)(1) of this AD, repetitively inspect the slip-clutch and replace any parts found to be outside the wear limit before further flight after the inspection in which the part(s) exceeds the specified limit. (3) Every 25 hours TIS after September 10, 2007 (the effective date of this AD), inspect the tiltplay of the clutch drum on the hub for excessive play. (i) With the tooth belt released, measure the play in the axial direction on the starter gear. The play limit is .024inches (0.6 mm); and (ii) Before further flight after any inspection in which excessive play is found, replace with an FAA-approved part that is new or overhauled by the manufacturer. (4) Every 50 hours TIS after September 10, 2007 (the effective date of this AD), replace the slip-clutch with an FAA-approved part that is new or overhauled by the manufacturer. (5) As of September 10, 2007 (the effective date of this AD), only install slip-clutch cover plate P/N 2042888. (6) Each time before the slip-clutch is mounted, degrease the taper of the crankshaft and the hub of the clutch with thinner following the instructions in the service bulletin specified in paragraph (f)(7) of this AD. The pound inches equivalent to 120 Nm is 1062.1. (7) Do all actions required by this AD following SOLO Kleinmotoren GmbH Service Bulletin Nr. 4600-2-2, dated December 27, 2006. FAA AD Differences Note: This AD differs from the MCAI and/or service information as follows: Nodifferences. Other FAA AD Provisions (g) The following provisions also apply to this AD: (1) Alternative Methods of Compliance (AMOCs): The Manager, Standards Staff, FAA, ATTN: Gregory Davison, Aerospace Engineer, FAA, Small Airplane Directorate, 901 Locust, Room 301, Kansas City, Missouri 64106; telephone: (816) 329-4130; fax: (816) 329-4090, has the authority to approve AMOCs for this AD, if requested using the procedures found in 14 CFR 39.19. Before using any approved AMOC on any airplane to which the AMOC applies, notify your appropriate principal inspector (PI) in the FAA Flight Standards District Office (FSDO), or lacking a PI, your local FSDO. (2) Airworthy Product: For any requirement in this AD to obtain corrective actions from a manufacturer or other source, use these actions if they are FAA-approved. Corrective actions are considered FAA-approved if they are approved by the State of Design Authority (or their delegated agent). You are required to assurethe product is airworthy before it is returned to service. (3) Reporting Requirements: For any reporting requirement in this AD, under the provisions of the Paperwork Reduction Act (44 U.S.C. 3501 et.seq.), the Office of Management and Budget (OMB) has approved the information collection requirements and has assigned OMB Control Number 2120[pi]0056. Related Information (h) Refer to MCAI European Aviation Safety Agency (EASA) Emergency AD No. 2007-0001R1-E, dated January 10, 2007, and SOLO Kleinmotoren GmbH Service Bulletin Nr. 4600-2-2, dated December 27, 2006, for related information. Material Incorporated by Reference (i) You must use SOLO Kleinmotoren GmbH Service Bulletin Nr. 4600-2-2, dated December 27, 2006, to do the actions required by this AD, unless the AD specifies otherwise. (1) The Director of the Federal Register approved the incorporation by reference of this service information under 5 U.S.C. 552(a) and 1 CFR part 51. (2) For service information identified in this AD, contact SOLO Kleinmotoren GmbH, Customer Support, 71050 Sindelfingen, Germany; telephone: +49-(0) 7031-301-210; fax: +49-(0) 7031-301-136; e-mail: [email protected]. (3) You may review copies at the FAA, Central Region, Office of the Regional Counsel, 901 Locust St., Room 506, Kansas City, Missouri 64016; 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 [pi]register/cfr/ibr-locations.html.