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4. Retract the landing gear a small amount, extend again and check if the
lower green control light starts shining. If not, the arm was bent too far.
5. If the adjustment is correct, retract the landing gear and extend via the
emergency system. Check if the lower green control light starts shining. If
not, the arm was bent too far. After adjustment repeat the check according
to item 2.
b) Limit switch landing gear retracted
The spindle drive must be shut off in the retracted
position when the bolt at the left drag strut 10FW102
engages in the notch of the left latch on shaft 10FW109
and activates the limit switch which is mounted to the
latch.
Check: Activate the limit switch. The distance Y shall be
2 - 3 mm (0.08 – 0.12 in.) when the switch is activated.
If necessary adjust the switch by bending its arm.
c) Limit switch gas strut (emergency extension system)
This switch (position 12 in diagram 9) is mounted to the upper end of the
gas-strut at bracket 10FW120. When resetting the gas strut the spindle
drive must be stopped by the limit switch when the distance X in diagram 9
(from counter nut up to gas strut body) is 17 - 20 mm (0.67 – 0.8 in.). If
necessary loosen the mounting screws and rotate the switch for adjustment.
d)
Switch emergency extension system (optional with TN1000/19,
standard from ser.no. 10-157 on)
This switch
(position 20 in diagram 9) activates higher current for the
spindle drive via the LG control unit to reset the gas-strut as long as one of
the emergency extension handles is pulled. The switch is mounted to a
bracket 10FW143 which is mounted to the bracket 10FW120 see item c).
The switch is activated by the deblocking lever in the upper gas-strut end.
In case the spindle drive doesn't have enough power to reset the gas-strut
check the function of the switch. To accomplish this disconnect the 2 wires
from the switch. With one of the emergency extension handles pulled the
resistance between these 2 terminals must be zero. If necessary adjust the
switch by bending its arm.
1.6.1.3
Free play
Free play between bell crank 10FW108 and shaft 10FW91 is not allowed.
If there is any free play tighten the two bolts M8x45 inside the landing gear
box with a 13 mm open-end wrench. If there is still some free play, the
bolts should be removed and the holes drilled out and reamed to diameter
10 H7. M10 x 45 LN9037 bolts should then be installed.
Issued: July 2014
Copyright DG Flugzeugbau GmbH - any copy or publishing prohibited
Manual valid with the up-to-date cover page only
Maintenance Manual DG-1000M
TN1000/23
1.10
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