XtremeAIR XA41, Maintenance Manual

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Maintenance Manual XA41/XA42
AMM-XA42-0040-001 C.00
Page 4 Page date:
Chapter 20 25.09.2018
CAUTION
CAUTION
20-10-04 Torque Measurement
For self-locking nuts, add the torque value of the locking device (friction or brake torque) to
the value in the tables above. Read the friction value from the torque wrench when the nut
touches the washer.
When you tighten a bolt from the bolt head, do as follows: Add the value of the shaft friction
(the friction of the bolt in the attached part) to the value in the table. Read the friction value
from the torque wrench when the bolt touches the washer.
20-10-05 Check for Delamination
Do a coin tapping inspection to examine the airframe composite structure for delamination.
Use a large washer or coin and tap it against a solid surface. Make sure that you can hear a
typical metal sound. If there is a delamination, you will hear a soft sound.
20-10-06 Flexible Hoses
For the maintenance or overhaul work of the flexible hoses, refer to the manufacturer’s
service information and service bulletins. Examine the hoses and the hose assemblies for
deterioration at each inspection period.
Examine the hoses for:
• Leakage
• Separation of the cover or of the braid of the inner hose
• Hard parts or parts that are not flexible
• Cracks
• Scratches, marks or cracks because of the pressure of hose clamps or supports.
If damage occurs, replace all parts of the hose assembly. Use a new hose assembly with the
factory-installed end fittings. Make sure that all parts are the correct types with the specified
dimensions.
These oil, fuel, brake and sense lines are installed in the aircraft:
Table: Flexible hoses
Item Manufacturer and Type
Fuel, oil and sense lines in engine bay Parker, Stratoflex PTFE Type 101 and 124
Fuel lines in cockpit Parker, Stratoflex PTFE Type 101 and 124
Brake lines Parker, Stratoflex PTFE Type 101 and 124
Do not twist flexible hoses during installation. Twisted hoses can have lower life times.
Identification stripes along the hose will help you to install the hose correctly. Make sure that
they are straight and not twisted.
Do not change the routing when you replace flexible hoses. A different routing can decrease
the bend radius of the hoses. A small bend radius will decrease the life time of the hose.