Rudder Pedals Line - Magni Gyro M16C Ordinary Maintenance Manual

M16 (C) TANDEM TRAINER
MAINTENANCE MANUAL
3.10 RUDDER PEDALS LINE
(See Fig. 3.10/1 ‐ 3.10/2)
3.10.1 GENERAL INSTRUCTIONS
3.10.1.1 ENTIRENESS OF CABLES
The breaking of the cables (Ø 3 mm x 49 wires) does certainly not happen suddenly and unexpectedly. It will only
happen in the long term, if the correct maintenance of the gyroplane and of the system are neglected. The lack of
maintenance can generate an unexpected rubbing of the cable or excessive corrosion. Precautionary checks easily
allow avoiding such problems.
3.10.1.2 RUBBING
Repeated rubbing of the cables over a long period is the only cause of wear.
This wear can only occur where the cables pn 3x49 are close to the 6 pulleys pn084 and to the rudder pivot pn 086.
Excessive wear of the cable causes its flattening and the consequent reduction of its diameter or the breaking of
some wires of this same cable.
This may occur near the pulleys, where the cable is continuously in contact with the pulley and there is a
movement between both parts. Anyway, the interaction between cable and pulley is absolutely normal and does
not compromise the entireness of the cable. But the wear can become important if the pulley does not turn freely
because of excessive tightening or oxidation of the inner bearing pn 626‐ZZ. In such a case, the friction between
pulley and cable will not be rolling anymore; instead there will be rubbing which will damage the cable.
Similar problems may arise if the position of the cable guiding fork pn 083 is not correct, i.e. if it looses its vertical
position, thus interfering with the cable. The unavoidable rubbing could damage the cable in this case, too (see
detail "A").
3.10.1.3 OXIDATION
In the long term and if operated in very humid conditions, the steel cable pn 3x49 may be subject to oxidation,
causing some wires to break.
3.10.2 CABLES INSPECTION PROCEDURE
(See Fig. 3.10/1 ‐ 3.10/2)
1. Before starting verify that the engine's ignition key and push‐button are in OFF position and that all the
breakers are switched OFF;
2. Check the cable guiding forks pn 083, making sure they are vertical and that there are no
interferences with the cables (see detail "A");
3. Initially, proceed with a visual check of the cable pn 3x49. Make sure it is not damaged;
4. To do a more accurate check, pass two fingers all along the cable with a slight pressure;
ISSUE
A_November 2012
.
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