Airworthiness Directive · Amendment 39-15166 · Propellers
DG Flugzeugbau GmbH Model DG-500MB Gliders and Glaser-Dirks Flugzeugbau GmbH Model DG-800B Gliders
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.
We are adopting a new airworthiness directive (AD) for the products listed above. This AD results from mandatory continuing airworthiness information (MCAI) issued by the aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as:
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 plate of 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.024 inches (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.
Note: This AD differs from the MCAI and/or service information as follows: No differences.
