Installation Techniques Flashcards

When installing aircraft control cables, what is the purpose of the swaging process on terminal ends?

Answer: To compress the terminal fitting around the cable strands for a permanent mechanical connection

Swaging compresses the terminal sleeve onto the cable strands, creating a permanent high-strength mechanical attachment tested to cable rated strength.

A technician finds that a control cable has been routed around a pulley at greater than the maximum allowable fleet angle. What is the correct action?

Answer: Relocate the pulley or reroute the cable to bring fleet angle within limits

Excessive fleet angle causes rapid cable and pulley wear; the only correct fix is to relocate the pulley or reroute the cable to comply with specifications.

Which of the following describes correct procedure when installing a hose clamp on an aircraft fuel hose?

Answer: Torque the clamp screw to the hose manufacturer's specified value

Hose clamps must be torqued to the manufacturer's specified value to ensure adequate sealing without over-tightening and cutting into the hose.

When installing a new pitot tube, what must be verified after installation to ensure airworthiness?

Answer: That the pitot tube drain hole is unobstructed and the heating element operates correctly

Pitot tube installation requires verification of unobstructed drain holes and correct operation of the anti-ice heating element to maintain accurate airspeed readings.

During instrument installation, a technician must install a gyroscopic instrument requiring vacuum. What color tubing is used for the vacuum supply line to this instrument?

Answer: Red tubing indicating suction/vacuum

Aircraft vacuum/suction system lines are color-coded red to distinguish them from pressure and other fluid lines during maintenance.

What is the correct method to verify that a newly installed static system is free of leaks before return to service?

Answer: Apply negative pressure equivalent to 1,000 feet altitude and confirm no more than 100 feet leak-down over one minute

FAR 91.411 requires the static system to hold a 1,000-foot altitude equivalent leak test with less than 100-foot loss per minute after installation.

When installing AN3 through AN20 bolts, where should the bolt head be positioned relative to the direction of load?

Answer: Head positioned so that if the nut were lost, the bolt would remain in place

Bolts should be installed so that nut loss would not allow the bolt to fall out, using load direction, gravity, and airflow as retention aids.