Maintenance Manual STEMME S10-VT
Date of Issue: Jan. 01, 1998
Page 7-7
Amendment Nr. 0
Date:--
A4011121_B23.doc
Doc. No. A40-11-121
7.3 Controls
Description:
See section 3.3
Lubrication:
See section 6.5
Adjustment and Rated Data:
See section 6.4
Control Rods, General:
The control rods must be checked with special attention on the condition of their terminals. The swaged
terminals of all control rods must be checked for longitudinal and radial cracks, all fork terminals for cracks,
specially at the transition area of fork root and side frame.
Function of Flight Controls, General
Check control stick, pedals, flap lever, trim lever and airbrake lever for smooth and unobstructed operation.
Check for intended spring forces in controls and proper locking and unlocking of airbrakes. Check proper flap
setting indication on centre console. Check full deflections of stick and pedals to the relevant stops and
symmetry of neutral positions.
7.3.1 Controls in Fuselage
Remove control system coverings in cockpit. Check condition, smooth operation, proper installation and tight
screw and rivet connections of components in cockpit (specially bearings, joints, rods and bell-cranks). Check
for foreign objects. Check tight fit of control stops below stick cover. Check condition of pedals close to the
cable guides and condition of cable guides. Check pedals for smooth adjustment, clean sliding guide with
alcohol if required.
Check all control rods and levers, including slides for rudder cables, in centre fuselage for tight fit of all joints,
proper condition of bearings, damage, scratches and deformation.
NOTE:
Do not use grease or oil to improve smooth operation of pedal adjustment!
Check condition and attachment of rubber stops on centre steel frame. Check function, proper installation
and tight fit of downspring assembly. Check condition of wire, which secures springs, and renew if required.
Check condition of flap gas spring assembly in flap controls for proper installation, tight fit and signs of
leakage of gas spring.
Check control rods and bearings in the area of wing-to-central fuselage attachments, check condition of
quick- joints and securing of its spring bolts.
7.3.2 Controls in the Wing
For checks and maintenance of the L`Hotellier Connections (aileron control rods at the inner-to-outer wing
division) refer to Annex A.
To check bell-crank levers and adjacent components of flap and aileron control system remove fairings of the
flap and aileron link rods and inspect the bell-crank levers and the other parts of the flap and aileron drive
systems in the wing by means of a endoscope or mirror.
The airbrakes should properly close to the wing surface when locked. To allow for wing bending, between
ends of airbrake covers pointing to fuselage and wing must be a clearance of minimum
1.5 mm / 0.06 in.
Check tight fit and securing of upper screw joints, and condition and tight fit of bolts in lower airbrake.
