SZD-54-2
„Perkoz”
TECHNICAL SERVICE MANUAL
SECTION 16.
PERIODIC MAINTENANCE
Issue II
April 2014
Revision
Allstar PZL Glider Sp. z o.o.
Doc No. 542.4.02
page 16.3
corrected
16.7. Rules for operations of cables
Maximum service life of cable in control systems is 12 years. All cables that
have reached 12 year in service must be replaced with new ones
Operation of cable is held on a basis of assessment of its technical condition.
Within annual inspection, for all cables inspect carefully:
correct position on pulley,
technical condition and securing of turnbuckles,
condition of cotter pins on cable connecting bolts,
condition of cable on the area of contact with pulleys, and in front pedal
„S-shaped” tubes.
There must be no further operations of cables corroded, with broken single
wires, with wires worn more than half of their diameter, with guides having evidence
of wear or with jammed, not rotating pulleys.
Lubrication of cables in Bowden housing is to be done in accordance with item
5.1.3.
Replacement of cables, and repair of guides and pulleys should be certified in
accordance with applicable regulations.
In pre-flight inspection, verification of the points of cable connection to pedals,
and of cotter pins on cable connecting bolts is mandatory.
16.8. Inspection of non-accessible areas in control systems
These inspections refer to:
aileron control system in a wing (Fig. 2
‒13.),
airbrake control system in a wing (Fig. 2
‒15.).
If resistance to motion identified in the concerned control circuits are within
limits given in item 3.3. of this Manual, and the control stick play does not exceed
0,08
”, and no other malfunction evidence occurs (like noise at pushrod movement,
knocks, skidding, discontinuous action, rubbing), then the condition of control system
is considered correct.
Otherwise and always, whenever there are doubts to the proper operation of
system, an inspection of control system elements should be done by making the
inspection cut-outs in wing skin and possible disassembling of concerned elements.
As an option, borescope inspection might be acceptable.
