Assembly and Rigging Flashcards
7 cards from real Airframe Mechanic Certification practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Assembly and Rigging flashcards as text
On a helicopter, tracking the main rotor blades is done to ensure:
Answer: All blades rotate in the same plane of rotation
Rotor tracking verifies that all blades rotate in the same plane to minimize vibration caused by out-of-track blades.
What is the function of a jury strut on a semi-cantilever wing?
Answer: Prevents the interplane strut from bowing under compression loads
A jury strut braces the interplane or wing strut at its midpoint to prevent bowing or buckling under compressive loads.
When checking flight control surface travel with a protractor, where is the protractor typically placed?
Answer: On the top surface of the control surface at the specified reference location
The protractor (or inclinometer) is placed on the top surface of the control surface at the reference station specified in the maintenance manual.
When rigging pushrods, what condition should be avoided to prevent binding or misalignment forces on the rod-end bearings?
Answer: Allowing the pushrod to carry side loads due to misalignment
Rod-end (rod end) bearings are designed for axial loads; side loads from misalignment cause premature wear and possible failure.
The rigging pin (alignment pin) used during assembly of a control surface to the airframe is intended to:
Answer: Hold components in precise alignment for installation of fasteners
Rigging pins temporarily hold parts in the exact alignment position specified by the manufacturer so that fasteners can be installed correctly.
An aircraft elevator is rigged with excessive up travel. The most likely result during flight is:
Answer: Risk of exceeding limit load factor in pitch-up maneuvers
Excessive up elevator travel allows the pilot to generate more than the design limit load factor in pitch, potentially causing structural damage.
What is 'differential aileron travel' and why is it used?
Answer: Ailerons deflect more up than down to compensate for adverse yaw
Differential aileron travel means the up-going aileron deflects more than the down-going aileron to reduce adverse yaw caused by increased drag on the down aileron.