EASA Part-66 Module17 propeller foundations case studies
EASA Part-66 Module17 propeller foundations · Put your knowledge to work in context.
This independent study page provides practice for EASA Part-66 Module17 propeller foundations. Its editorial learning areas include Blade geometry, loads and construction; Governing, feathering and ground pitch control; Synchronization, phase and ice protection; Inspection, balance, damage and preservation. The questions develop subject knowledge and application through worked reasoning, distinctions between competing answers, and practical scenarios. Study the relevant guide before attempting a mixed set, then explain the evidence or calculation that supports each answer. Topics on this exam: Blade geometry, loads and construction, Governing, feathering and ground pitch control, Synchronization, phase and ice protection, and Inspection, balance, damage and preservation. The EASA Part-66 Module17 propeller foundations case studies are 4 cases and about 736 words.
1Slip with an explicit denominator
A fictional geometry worksheet assigns a propeller a geometric advance of 80 inches per revolution and an effective advance of 64 inches per revolution at one stated condition. It asks for slip distance and slip as a percentage of geometric pitch.
190 words, under 1 min2A stated control design
A fictional system diagram explicitly shows hydraulic pressure moving a pitch piston toward fine pitch, with a spring and counterweights acting in the opposite direction. The exercise asks only which tendency follows from releasing that pressure while the stated opposing forces remain available.
190 words, under 1 min3Speed and phase evidence
A fictional two-propeller training display reports both rotational speeds as 1800 revolutions per minute. A separate phase indication is not available, and the exercise provides no vibration measurement or blade-tracking result.
178 words, under 1 min4A smooth surface after an impact
A fictional maintenance report states that a propeller experienced an obstacle impact but now looks smooth after cleaning. It supplies no approved damage evaluation, internal inspection, engine assessment or manufacturer disposition.
178 words, under 1 min