7.3.6
Main Bolts & Safety Bungees
7.3.7 D-
Spar
7.3.8
Sail Tension
7.3.9
Connection Sail/Keel
7.3.10
Flap Rope, Flap Pins Connection
7.3.11
Flap Return Bungees
If a flap does not return to the stop on the keel tube, the bungee at the front end of the keel must be
adjusted and replaced if it is severely worn. Check before each flight.
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The ribs should be checked every 50 flight hours or after any overloading. If a wingtip touches the
ground on a landing, be sure to check the winglets as well. Check the outer ribs and rib connectors
for damage.
The main bolts at the nose should be checked every 100 flight hours or after about 50 flights.
They should be dismantled, cleaned and greased as they serve as pivot points. After mounting,
make sure their bungee is placed around the main bolts and slid under the lynch pin.
If the D-spar is subject to high point loads such as exposure to a rocky set up area or improper
transport, the D-spar should be examined for damage. Check the leading edges by pressing the
shell with your thumb for softness or a crack. A cracking or crunching sound when pressure is
applied to the leading edge or back wall of the D-spar indicates damage. Contact the manufacturer
or a testing center authorized by AIR for repair. Do not fly the glider until the damage has been
repaired.
Particular attention should be paid to the spar straps. They run above and below the bridge and from
the nose to the outer wing. If damage is identified in these areas, it is essential to ask the
manufacturer for advice. The same applies if the spar has been subjected to heavy mechanical
loads in this area, e.g. due to improper transport or a crash.
If the sail tension appears too loose after set up (e.g. folds in the sail), the wing sweep and the
connections on the ribs can be adjusted. This may be necessary, especially after the first few
flight hours. The sail tension can be adjusted using an Allen key using the threaded sleeves at
the end of each rib. It is important to ensure that the threaded sleeve is not unscrewed too far. At
least 3 threads must remain in the threaded sleeve.
The webbing that connects the sail to the keel at the trailing edge must be tight when set up.
Check this each time you set up. If the webbing is loose, the wing sweep may change in flight.
Flight characteristics and safety could be compromised. The straps must be tight. When
readjusting, make sure that the straps are looped back in the buckle.
Before each flight, the flap string and the lines connecting the flap pins must be checked. These
are exposed to strong mechanical loads and must not show any signs of damage. The flap string
and cleat must be checked before each flight. If strings or cleats are worn, they must be replaced.
The spoiler lever rib should be carefully checked. The connection joint between the spoiler lever
and rib is esecially important to check for any damage.
