Check And Replacement Of Flexible Shaft - Magni Gyro M16C Ordinary Maintenance Manual

M16 (C) TANDEM TRAINER
MAINTENANCE MANUAL
SECTION 3
3 ORDINARY MAINTENANCE PROCEDURES
(Inspections – Checks – Adjustments – Replacements)
3.1 CHECK AND REPLACEMENT OF FLEXIBLE SHAFT
(See Fig 3.1/1‐3.1/5)
The flexible power transmission unit (1) used during the pre‐rotation phase needs periodical inspection and
greasing so as to prevent system failures.
The life of this system is strongly connected to the type of use of the pre‐rotation, to the average speed reached
during pre‐rotation and to the smoothness of its coupling.
WARNING:
To avoid unexpected failures, we suggest an inspection of the flexible shaft pn 118 every 100 flight
hours for a standard use (pre‐rotation speed between 200 and 220 r.p.m.) and every 50 hours for higher
performance use (pre‐rotation speed between 220 and 250 r.p.m.).
Please remember that the flexible shaft pn 118 is heavily greased before installation. Before starting the inspection
procedure it is recommended to use latex gloves to avoid skin‐grease direct contact. The following are
maintenance procedures for the flexible shaft system.
3.1.1 REMOVAL OF FLEXIBLE SHAFT
(See Fig 3.1/1 ‐ 3.1/5)
1. Before starting, verify that the ignition contact is in OFF position and that all the breakers are switched
OFF;
2. Put the control stick (2) in forward limit stop position;
3. Loosen the clamps pn 4B‐25‐45 and release the flexible shaft from the support pn193.
4. Remove the clamping bolts M6x16 that fix the flexible sheathing pn 119 to the pre‐rotation assembly pn
117; take care not to loose the spacer washers (3);
5. Extract the flexible sheathing pn 119 from the pre‐rotation assembly; be very careful with this sheathing
pn 118 as it could slide down and out of the sheathing, thus damaging or dirtying other components.
6. Vertically stretch the sheathing to help the controlled pull out of the flexible shaft pn 118; it is
recommended to mark the upper and lower ends differently so as to avoid upside‐down re‐installation.
7. Lay the flexible shaft on a bench, or keep it in a vice (very gently tightened), so as to be able to proceed
with the inspection and evaluation of the wear.
ISSUE
A_November 2012
.
PAGE
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