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MISCELLANEOUS AIRWORTHINESSS INFORMATION - DG-400

1. SIMPLIFIED CG RELEASE REMOVAL. The relatively small access hole for the belly release makes removal of the release at each annual inspection difficult. The cut out in the seat shell can be enlarged in accordance with Figure 1 to make removal of the release easier. 2. OPTIONAL AUTOMATIC PROPELLER BRAKE. Glaser-Dirks Technical Note 826/23 describes the optional installation of an automatic propeller brake and engine extension and retraction system. 3. REPLACEMENT IGNITION UNIT.  Glaser-Dirks Technical Note 286/27 describes the installation of modified Ducati electronic ignition units to replace the original Bosch unit which is no longer available. In the event of failure of the original Bosch units the replacement Ducati units must be used. 4. USE OF WEDEKIND SAFETY SLEEVES Glaser-Dirks Technical Note 826/28 describes the optional fitment of Wedekind Safety Sleeves to the l’Hotellier couplings. 5. OPTIONAL NOISE ABSORBING FAIRING. Glaser-Dirks Technical Note 826/29 describes the optional installation of a noise reducing fairing. 6. OPTIONAL QUIETER PROPELLER. DG Flugzeugbau Technical Note 826/29 describes the optional installation of the propeller fitted to the DG-800. Installation of the propeller requires installation of the noise absorbing fairing and together they reduce engine noise by 2.5 dB(A). 7. Engine cooling air guide. DG Technical Note No. 826/38 informs about the optional installation of a GFRP cooling air guide instead of the original part made of aluminium, which may get cracks due to fatigue.