Aircraft Technical Manual
J120, J160, J170, J200/J400, J230/J430, J250/J450 Variants
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5.17 Special Inspections – Control Cables (all J-Series)
- Steel Ruler or similar
- Spring balance (graduations less than 300 grams)
L1, L2 or LAME (Owner, A&P or LSA Repairman / Maintenance)
L1, L2 or LAME (Owner, A&P or LSA Repairman / Maintenance)
Inspections are required to be carried out on the primary control cables (aileron, elevator & rudder) at
intervals detailed in the Airworthiness Limitations Section of this Manual (Appendix V or Section 22).
These inspections are to be carried out as described below:
- Measure the movement of the trailing edge of each control allowed by cable free play.
- Disconnect both ends of the cable.
- Move the cable by hand through its full range of movement to check freedom of movement.
- Using a spring balance with graduations of no more than 300g, measure the friction required to
move the cable. Repeat this step to give a minimum of 5 friction measurements in each direction
of travel.
- Reconnect one end of the cable and measure slack in the cable.
The cable must be replaced if the following is found:
- Excess friction – maximum allowable force to move cable 1.9kg.
- Excess slack in cable – maximum allowable cable slack 3.5mm
- “Hard” or “tight” patches of the cable travel.
- Gritty or rough operation.
- Significant visible damage or degradation such as corrosion, scoring etc.
Remedial Action
Remedial action (replacement or re-routing of cable to reduce measured values) is required if the
control free play exceeds the values given in Table 5-2. The amount of free play in each control
linkage should be within the same tolerance as the control cable itself (i.e. 3.5mm)
Table 5-2 – Control Free Play Limits
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