Airworthiness Directive · Amendment 39-15219 · Flight controls
DG Flugzeugbau GmbH Model DG-500 Elan Series, DG-500M, and DG-500MB Gliders
This AD applies to Models DG-500 Elan Series, DG-500M, and DG-500MB gliders, all serial numbers, 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 the next flight after October 25, 2007 (the effective date of this AD) and thereafter at intervals not to exceed 12 months, inspect the actual torque of the nut that attaches bell crank 5St19 to the bolt following Working Instruction No. 1, dated June 20, 2007, as referenced in DG Flugzeugbau GmbH Technical Note 348/19 and 843/26 (same document), dated June 20, 2007, as applicable to type.
(i) If the torque is found to be less than 2.2 ft. lb. (3 Nm), before further flight, replace the affected bolt with a serviceable bolt following Working Instruction No. 2, dated June 20, 2007, as referenced in DG Flugzeugbau GmbH Technical Note 348/19 and 843/26 (same document), dated June 20, 2007, as applicable to type.
(ii) Report any findings of insufficient torque you find within 7 days after insufficient torque is found. Include in your report the glider serial number, glider hours time-in-service (TIS), the torque that was found, and a point of contact name and phone number. Send your report to DG Flugzeugbau GmbH, Otto-Lilienthal-Weg 2, D-76646 Bruchsal, Germany; telephone: +49 7251 3020140; facsimile: +49 7251 3020149; e-mail: dirks@dg-flugzeugbau.de.
(iii) If the torque is found to be 2.2 ft. lb. (3 Nm) or more, before further flight, increase the torque of the nut to 9 ft. lb. (12 Nm);
(2) Unless already replaced as required by paragraph (f)(1)(i) of this AD, within the next 6 months after October 25, 2007 (the effective date of this AD) or when the glider reaches a total of 1,000 hours TIS, whichever occurs later, and repetitively thereafter at intervals not to exceed 1,000 hours TIS, replace the affected bolt with a serviceable bolt following Working Instruction No. 2, dated June 20, 2007, as referenced in DG Flugzeugbau GmbH Technical Note 348/19 and 843/26 (same document), dated June 20, 2007, as applicable to type.
(3) Installation of an additional bracket following Working Instruction No. 3, dated June 25, 2007, as referenced in DG Flugzeugbau GmbH Technical Note 348/19 and 843/26 (same document), dated June 20, 2007, as applicable to type, terminates the repetitive requirement in paragraph (f)(2) of this AD.
Note: This AD differs from the MCAI and/or service information as follows: No differences.
