A&P - Aircraft and Powerplant Reciprocating Engine Overhaul Questions and Answers

Question 1

Which of the following defines a "major overhaul" of a reciprocating engine according to FAA guidance?

Accepted Answer

The complete disassembly, inspection, repair as necessary, reassembly, and testing of an engine to the manufacturer's specified fits and limits.

Answer

The repair of components outside the crankcase, which may include cylinder removal and piston ring replacement.

Answer

Any repair that, if improperly done, might appreciably affect weight, balance, structural strength, performance, or other qualities affecting airworthiness.

Answer

An engine that has been disassembled, cleaned, inspected, and approved for return to service using only new parts.

Question 2

During a reciprocating engine overhaul, a crankshaft's runout is measured using a dial indicator. The total indicated runout exceeds the manufacturer's specified limits. What is the correct course of action?

Accepted Answer

The crankshaft must be replaced.

Answer

The crankshaft can be straightened using an approved cold-working process.

Answer

The crankshaft can be re-used if the runout is within serviceable limits, even if it exceeds new limits.

Answer

The engine can be reassembled and tested; runout may decrease during the break-in period.

Question 3

A technician is installing new piston rings on a piston during an engine overhaul. Which of the following is a critical step to ensure proper sealing and oil control?

Accepted Answer

Staggering the end gaps of the piston rings around the piston.

Answer

Aligning the end gaps of all compression and oil control rings to facilitate lubrication.

Answer

Installing compression rings with the marked side facing down towards the piston skirt.

Answer

Using chrome-plated rings on a chrome-plated cylinder wall to maximize durability.

Question 4

After performing a major overhaul on a reciprocating engine, what is the status of the engine's total time in service (TTIS)?

Accepted Answer

The total time in service continues from where it was before the overhaul.

Answer

The total time in service is reset to zero.

Answer

The total time in service is cut in half.

Answer

A new logbook is started, and the previous time is archived.

Question 5

An aircraft reciprocating engine has undergone a 'top overhaul.' Which of the following tasks would typically be included in this procedure?

Accepted Answer

Removing and reconditioning the cylinders, pistons, and valve-operating mechanisms.

Answer

Splitting the crankcase to inspect the crankshaft and connecting rods.

Answer

Overhauling the engine-driven accessories such as magnetos and the carburetor.

Answer

Performing a dimensional inspection of the camshaft lobes for wear.

Question 6

During the dimensional inspection phase of an engine overhaul, a part is found to be worn but still within the 'serviceable limits' specified in the manufacturer's overhaul manual. What does this indicate?

Accepted Answer

The part can be legally reinstalled and is expected to last until the next TBO.

Answer

The part must be replaced with a new one.

Answer

The part requires a major repair before it can be used.

Answer

The part can only be used if the engine is being reassembled for non-certified, experimental use.