Airworthiness directives › 2021-18-14
AD 2021-18-14 Airworthiness Directives; DG Flugzeugbau GmbH Gliders
Applicability*9
This AD applies to DG Flugzeugbau GmbH Models DG-808C and DG-1000T gliders, all serial numbers, certificated in any category.
Compliance
(1) For purposes of this AD, an “affected part” is a PU fuel hose installed in an airframe fuel system or engine compartment that: (i) Does not meet industrial standard DIN 73379-2A, or (ii) Does not meet ISO 7840-A1 without metal shielding. (2) For purposes of this AD, a “serviceable part” is a PU fuel hose installed in an airframe fuel system or engine compartment that: (i) Meets industrial standard DIN 73379-2A, or (ii) Meets industrial standard ISO 7840-A1 without metal shielding.
Required actions
Within the next 30 days after the effective date of this AD and thereafter at intervals not to exceed 12 months, visually inspect each affected part for fissures, kinks, and leaks. For this inspection, the ignition switch must be turned on to run the electric fuel pump to demonstrate an operating fuel pressure. (1) If a fissure, kink, or leak is found on an affected part during any inspection required by the introductory language to paragraph (g) of this AD, before further flight: Replace all affected parts with unused (zero hours time-in-service (TIS)) serviceable parts by following paragraphs 3 and 4 of the Instructions in DG Flugzeugbau GmbH Technical Note No. 800/46, Doc. No. TM800-46 FE-29-01 (English version) Issue 01.a, dated March 7, 2018 (TN No. 800/46), or paragraphs 3 through 5 of the Instructions in DG Flugzeugbau GmbH Technical Note No. 1000/38, Doc. No. TM1000-38 FE-29-01 (English version) Issue 01.a, dated February 15, 2018 (TN No. 1000/38), as applicable to your model glider. (2) If no fissures, kinks, and leaks are found on all affected parts during any inspection required by the introductory language to paragraph (g) of this AD, before each affected part accumulates 6 years since first installation on a glider or within 6 months after the effective date of this AD, whichever occurs later: Replace all affected parts with unused (zero hours TIS) serviceable parts by following paragraphs 3 and 4 of the Instructions in TN No. 800/46 or paragraphs 3 through 5 of the Instructions in TN No. 1000/38, as applicable to your model glider. If the date of first installation on a glider is unknown for any affected hose, replace all affected hoses within 6 months after the effective date of this AD.
Unsafe condition
This AD was prompted by mandatory continuing airworthiness information (MCAI) originated 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 damaged polyurethane (PU) fuel hoses due to environmental and fatigue deterioration. The FAA is issuing this AD to prevent reduced or interrupted fuel supply to the engine or fuel leakage. The unsafe condition, if not addressed, could result in loss of engine power or in-flight fire.
Affected ADs
None.
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