Overhaul Repair Practice Exam

FAA Repairman Certificate – Propeller Overhaul & Repair Practice Exam Questions And Correct Answers (Verified Answers) Plus Rationales 2026 Q&A | Instant Download Pdf

• What is the primary purpose of propeller overhaul?
• To repaint the blades for corrosion protection
• To restore the propeller to airworthy condition in accordance with

manufacturer specifications

• To increase propeller diameter for better thrust
• To balance the engine crankshaft

Rationale: Overhaul restores the propeller to airworthy condition by

inspecting, repairing, and reassembling it per manufacturer specifications and FAA standards.

• Which FAA regulation governs propeller maintenance and overhaul

requirements? 1 / 4

• FAR Part 65
• FAR Part 61
• FAR Part 43
• FAR Part 91

Rationale: FAR Part 43 outlines performance rules for maintenance,

preventive maintenance, rebuilding, and alteration, including propellers.

• Which document specifies the overhaul intervals and procedures for a

particular propeller model?

• Aircraft Type Certificate Data Sheet
• Propeller Manufacturer’s Maintenance Manual
• FAA Form 8130-3
• Airworthiness Directive Summary

Rationale: The manufacturer's maintenance manual contains overhaul

intervals, tolerances, and approved repair methods for specific models.

• What is the main cause of propeller imbalance?
• Uneven engine cylinder compression
• Incorrect torque of mounting bolts
• Uneven blade weight or shape
• Exhaust system leaks

Rationale: Unequal blade weight or aerodynamic shape causes

propeller imbalance leading to vibration and potential damage. 2 / 4

• During overhaul, what is used to detect internal flaws in a metal

propeller blade?

• Ultrasonic test
• Eddy current test
• Dye penetrant or magnetic particle inspection
• Radiography

Rationale: Non-destructive tests like dye penetrant (for nonferrous)

and magnetic particle (for ferrous) are standard for detecting surface cracks.

• Which of the following propeller types can have variable pitch during

operation?

• Fixed-pitch propeller
• Ground-adjustable propeller
• Constant-speed propeller
• Wooden fixed-pitch propeller

Rationale: Constant-speed propellers allow pitch change during

operation to maintain RPM efficiently under varying flight conditions.

• Which material is most commonly used for modern propeller hubs?
• Magnesium
• Carbon steel
• Aluminum alloy
• Brass 3 / 4

Rationale: Aluminum alloy hubs provide strength and corrosion

resistance while keeping the overall weight low.

• What is the function of the pitch control mechanism in a constant-

speed propeller?

• Adjusts engine compression
• Changes blade angle to control engine RPM
• Controls fuel mixture
• Engages the starter

Rationale: The pitch control system varies blade angle to maintain

selected engine RPM automatically.

• When inspecting a wooden propeller, the presence of compression

wrinkles near the hub indicates:

• Propeller has suffered an overload or impact and must be rejected
• The wood needs refinishing
• The blade is out of balance only
• The propeller requires tightening

Rationale: Compression wrinkles near the hub suggest structural

overload; such damage is cause for rejection.

• Which FAA form certifies that a repaired propeller meets

airworthiness requirements?

• Form 337
• Form 8130-3
• Form 8610-2
• / 4