Secondary Controls - Magni Gyro M16C Ordinary Maintenance Manual

M16 (C) TANDEM TRAINER
MAINTENANCE MANUAL
3.9 SECONDARY CONTROLS
3.9.1 CHOKE CONTROL LINE
(See Fig. 3.9/1)
The choke's control line starts from the lever pn 128, placed at the left side of the main structure's longitudinal
spar (1), close to the floor.
A cable 1,5x2500 mm is fastened to the control lever by means of a cable retainer pn 107 which is inserted in its
sheath pn 131, which in turn is fastened to the left side of the main structure (1) and reaches the splitter pn 132
located close to the engine mount.
After the splitter pn 132, the movement is transmitted through two cables 1,2x1000 mm fastened to the throttles
of the two cable retainers pn 133 ‐ to the choke's throttles (2) located on the carburettors.
Oxidation of the cables in the choke line could be the cause of nasty consequences, as the throttles (2) placed on
the carburettors could not return to closing position when the pilot lowers the choke.
This results in excessive fouling of the spark plugs and, in the long term, in a possible contamination of the oils.
WARNING:
Due to the above mentioned remarks, a careful check of the correct sliding of the cables inside the
sheaths pn 131 and the consequent correct closing of the choke throttle valves (2) are strongly
recommended.
3.9.1.1 REPLACEMENT OF CHOKE CABLES
(See Fig. 3.9/1)
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. Put the choke lever pn 128 in OFF position;
3. Cut the cable 1,2x1.000 and remove the cable terminal protection pn 103 located close to the lever of the
carburettor (2);
4. Loosen and free the cable 1,5x2500 from the cable retainer pn 107 that fastens it to the choke lever pn
128;
5. Cut the cable 1,5x2.500 between the sheath pn 131 and the deformation (3) caused by the tightening
action of the retainer pn 107. This deformation could cause some problem when doing step 9;
6. Loosen the cable retainers pn 133 and free the cables 1,2x1000 from the carburettors' throttles;
7. Cut the cables 1,2x1000 between the sheath pn 131/A and the deformation (4) caused by the tightening
action of the retainer. This deformation could cause some problem when doing step 9;
8. Open the splitter pn 132 and withdraw the lower cap (132/A);
9. Extract the kern (132/B) of the splitter and the three cables (one low and two upper cables).
10. Visually check the cable. If there is no oxidation, the gyroplane has been used in optimal conditions, with
low humidity, it has been cleaned accurately, did not fly in the rain and was not parked in a makeshift
hangar;
WARNING DANGER:
11. Before starting to clean the internal part of the sheath, direct the upper end of the sheath pn
131 downward, far away from people and heat sources;
12. Starting from the sheath end (5) in the cockpit, spray some releasing agent inside the sheath;
13. Always from the sheath end (5) in the cockpit, now spray some spray grease in the sheath;
14. Insert the new cable 1,5x2.500 of the choke, following the sequence: splitter lower cap (132/A), sheath
ISSUE
A_November 2012
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