Maintenance Manual LS4
Issued: May 2011
Copyright DG Flugzeugbau GmbH - any copy or publishing prohibited
Manual valid with the up-to-date cover page only
b) After pulling the emergency canopy release handle, the pilot pushes the
canopy up at the rear to disengage the LS-Latch (Röger hook) from the
spring on the fuselage.
c) Then the pilot lifts the canopy at the rear end up as far as possible, the
person at the front end holds the canopy on the canopy hinge.
Caution*: The person at the front end should not lift the canopy too far up.
Otherwise this would unduly deform the spring of the LS-Latch (Röger hook)
located at the fuselage.
Note: b) and “Caution*” apply only if TN 4032 LS-latch (Röger Hook) has been
performed.
Reinstalling the canopy:
2 persons are needed
LS4 and LS4-a:
a) Pull the canopy hinge up to the open position.
b) One person (at the front end) holds with one hand the emergency release
lock in open position and places the canopy with the other hand onto the
hinge. The other person holds the canopy rear end so far up that it
matches the canopy hinge.
With TN4032 executed: The spring fixed at the canopy must be
inserted into the ring at the canopy lifting mechanism. When pressing
down the canopy make sure that the spring doesn’t buckle.
c) The front person engages the canopy by turning the emergency release
lock to the stop.
LS4 -b:
a) One person (at the front end) moves the right hand side canopy handle
completely backwards to the emergency release position.
b) The other person holds the canopy rear end so far up that it matches the
canopy hinge.
c) The front person places the canopy onto the hinge, pushes the locking
device up and engages the canopy by rotating the locking lever counter
clockwise up to the stop. Move the canopy slightly in all directions to
facilitate the procedure.
With TN 4032 executed check function of LS-latch (Röger hook) for
canopy emergency release:
Measure force required to pull bolt free from spring during opening of
canopy at rear canopy edge: force should be between 8 and 15 kg (18 to 33
lbs).
When force is clearly lower, the spring must be exchanged to guarantee
proper separation of canopy from fuselage during jettison.
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