DOCUMENT NUMBER:
L500-912.820 ISSUE JUL 20, 2016
AMENDMENT: 00
DATE:
CHAPTERPAGE 743
MAINTENANCE MANUAL STEMME S12
• Retraction of right landing gear leg:(independent from the left leg - for this purpose,rst
actuate left stop switch retracted, then disconnect the arm linking the operating cable to
the left LG door - take care that the cable and arm do not jam as the right leg is retracted).
- Check if the leg contacts surrounding components.
- Brake hose must have regular bends, must not jam.
- The stop switch must contact the center of the landing gear tube.
- Joint heads of the operating over-center strut must not be jammed.
- Articulation between the spindle and the operating over-center strut must not jam.
• Extension of right landing gear leg:
- Check for correctly over-center-locked position of the operating elbow lever
• Retraction of both landing gear legs:
- Interference check.
- Align stop switch on the right landing gear leg for a clearance of 2 – 3 mm / 0.08 to 0.12 in
between both gear legs.
• Check of landing gear doors (rst connect left LG door):
- Smooth operation of gear doors.
- Fit of gear doors.
- Positive clearance between gear doors and wheels.
• Retract landing gear with the upper cowling of the center fuselage installed:
- Check clearance between the drive spindles and the cowling.
- The bowden cables of the emergency release system must not be buckled or get stuck
•
Test of complete system: retract and extend the landing gear three times with intermediate
checks each time:
- Inspect supports of switches.
- Inspect switches (attachment), damage.
- Listen to spindle motor noise.
- If necessary, adjust brake bands.
- Inspect for chafed spots on the brake hoses.
- Check for stress-strain loads acting on the wiring.
-
Check position indication (LED’s on instrument panel: two greens when extended, red
ashing during operation, o when fully retracted) and acoustic warning (if L/G not fully
extended and air brake lever in rear, unlocked positions).
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