Airworthiness Directive · Amendment 39-18936 · Fuel
DG Flugzeugbau GmbH Gliders
This AD applies to DG Flugzeugbau GmbH Models DG-400, DG-500M, DG-500MB, DG-800A, and DG-800B gliders, all serial numbers, that:
(1) Have textile fabric covered fuel hoses installed in the fuselage; and
(2) are certificated in any category.
Note 1 to paragraph (c) of this AD: Metal fabric covered fuel hoses installed in the engine area are not affected by this AD.
We are adopting a new airworthiness directive (AD) for all DG Flugzeugbau GmbH Models DG-400, DG-500M, DG-500MB, DG-800A, and DG-800B gliders. This AD results from mandatory continuing airworthiness information (MCAI) issued by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as a manufacturing defect in certain textile fabric covered fuel hoses, which could cause the fuel hose to fail. We are issuing this AD to require actions to address the unsafe condition on these products.
Unless already done, do the following actions:
(1) Within the next 30 days after July 31, 2017 (the effective date of this AD), inspect all textile fabric covered fuel hoses located in the fuselage following Instructions 1. of DG Flugzeugbau GmbH Technical note (TN) No. 800-44, 500-10, DG-SS-02, dated November 9, 2016.
Note 2 to paragraph (f)(1) through (6) of this AD: DG Flugzeugbau GmbH TN No. 800-44, DG Flugzeugbau GmbH TN No. 500-10, and DG Flugzeugbau GmbH TN No. DG-SS-02, are all dated November 9, 2016, and co-published as one document.
(2) If any kinking or wet fabric covering is found during the inspection required in paragraph (f)(1) of this AD, within the next 14 days after the inspection, replace all textile fabric covered fuel hoses located in the fuselage following Instructions 2. of DG Flugzeugbau GmbH TN No. 800-44, 500-10, DG-SS-02, dated November 9, 2016, and DG-400 diagram 8, 6 TN DG-SS-02; DG-500M diagram 14, TN 500/10; DG-500MB diagram 14, TN 500/10; DG-800A/LA diagram 11, TN 800/44; DG-800B Solo 2625 diagram 11, TN 800/44; DG-800B Solo 2625 diagram 11a, TN 800/44; DG-800B Solo 2625 diagram 11b, TN 800/44; and DG-800B ab W.Nr. 8-155/from ser. no. 8-155 on, diagram 11d, TN 800/44, as applicable, all diagrams issued October 2016.
(3) If no kinking or wet fabric covering is found during the inspection required in paragraph (f)(1) of this AD, within the next 12 months after July 31, 2017 (the effective date of this AD), replace all textile fabric covered fuel hoses located in the fuselage following the instructions and diagrams specified in paragraph (f)(2) of this AD.
(4) Within 12 months after doing the replacements required in paragraph (f)(2) or (f)(3) of this AD, as applicable, and repetitively thereafter at intervals not to exceed 12 months, inspect all fuel hoses in the fuselage for any signs of wear, fissures, kinks, lack of tight fit, or leaks. For this inspection, the ignition switch must be turned on to run the electric fuel pump to demonstrate an operating fuel pressure. Do this inspection following Instructions 4. of DG Flugzeugbau GmbH TN No. 800-44, 500-10, DG-SS-02, dated November 9, 2016.
(5) If any signs of wear, fissures, kinks, lack of tight fit, or leaks are found during any inspection required in paragraph (f)(4) of this AD, replace the defective fuel hose in the fuselage following the instructions and diagrams specified in paragraph (f)(2) of this AD. Continue with the repetitive inspections as specified in paragraph (f)(4) of this AD.
(6) If no signs of wear, fissures, kinks, lack of tight fit, or leaks are found during any inspection required in paragraph (f)(4) of this AD, at intervals not to exceed 10 years, replace the fuel hoses in the fuselage with new fuel hoses following the instructions and diagrams specified in paragraph (f)(2) of this AD.
