STEMME S10 - Page 41

Maintenance Manual STEMME S10 Date of Issue: Oct. 01, 1990 page: 39
Amendment No.: - Date: -
A4010021_B19.doc Doc.No.: A40-10-021
− retraction of left landing gear leg:
Check if the landing gear contacts surrounding components,
Brake tube must have regular bends, may not jam.
Stop switch adjustment: 0.08 to 0.2 in. (2 - 5 mm) clearance between the landing gear leg and the shaft
housing.
Joint heads of the operating arm may not be jammed
Articulation between the spindle and the operating arm may not jam;
− extension of left landing gear leg: check if the operating arm returns to its correct over-center-locked
position, if necessary adjust the switch.
− retraction of right landing gear leg:
(separated from the left side - for this purpose, actuate left stop switch "retracted")
Check if the leg contacts surrounding components.
Brake tube must have regular bends, may not jam.
Stop switch must be positioned halfway on the landing gear leg.
Joint heads of the operating arm may not be jammed.
Articulation between the spindle and the operating arm may not jam.
− extension of right landing gear leg: check for correctly over-center-locked position of the operating arm.
− retraction of both landing gear legs:
Collision check.
Align stop switch on the right landing gear leg for a clearance of 0.08 to 0.12 in. (2 - 3 mm) between both
gear legs;
− check of landing gear doors:
Smooth operation of gear doors
Fit of gear doors.
Clearance between gear doors and wheels 0.4 to 0.6 in. (10 - 15 mm).
− retract landing gear with the upper cowling of the central fuselage mounted:
Check clearance between the drive spindles and the cowling; the bowden cables of the emergency
release system may not be buckled or get stuck;
− endurance test: retract and extend the landing gear ten times (at intervals of 2 minutes) with intermediate
checks each time:
- inspect supports of switches
- inspect switches (attachment), damage
- listen to spindle motor noise
- if necessary, adjust brake bands
- look out for chafe spots on the brake tubes
- check for stress-strain loads acting on the wirings.
Functional Check of EMERGENCY LET DOWN: (fig. 7.4.1.a)
− support the aircraft;
− actuate the EMERGENCY-UNDERCARRIAGE handles. Actuating force is 22.5 to 45 lbf. (100 - 200 N).
The landing gear legs must remain in the extended position (function of spring clips on the operating
arms);
− remounting of the operating arm joints to the spindles: landing gear switch "DOWN", move the spindles by
means of the stop switches on the operating arms, until their relative position to the articulations is correct.
− introduce latch lever and shift it into the operating position, introduce release elbow lever, lock with spring
element. Afterwards perform a functional check: retract and extend the landing gear once.
Tires
The tires are to be replaced at the latest, when the profiles are worn thin. Pay attention to the slip marks
rim/tire. Apply Loctite (metal glue) to the attachment screws on the wheel axles.