Engine Inspection

Question 1

What functions need to be accomplished in order to prepare an engine for a 100 hour inspection?

Answer 1

Remove the cowling and clean.

Question 2

What publication is needed to inspect an engine conformity with specifications?

Answer 2

The Engine specifications or TCDS

Question 3

What publication is needed to check an engine for normal operation?

Answer 3

The Engine’s Maintenance Manual

Question 4

What publications can be used as a checklist guide for 100 hour inspections on aircraft engines?

Answer 4

FAR Part 43 Appendix D

Question 5

How do you identify an engine serial number?

Answer 5

It is on the engine data plate.

Question 6

Prior to returning a reciprocating engine to service after a 100 hour inspection, what operational checks must be performed?

Answer 6

Check the power output, magnetos, fuel/oil pressure and oil temperature.

Question 7

Where are life-limited parts of an engine listed?

Answer 7

Engine Maintenance Manual, TCDS, Airworthiness, Limitations and Instructions for Continued Airworthiness

Question 8

Where can engine operating limits be found?

Answer 8

Engine Manual, TCDS, Engine Specification, Aircraft Maintenance Manual

Question 9

Why are hot sections inspections performed on turbine engines?

Answer 9

To determine the integrity and wear of the hot section components

Question 10

What inspections must be performed following a turbine engine Over speed?

Answer 10

Refer to engine maintenance manual

Question 11

What inspections must be performed on a turbine engine if the EGT exceeds its operational limits.

Answer 11

A hot section inspection

Question 12

What FAA approvals are required when installing an engine that is not on the aircraft type certificate?

Answer 12

A Suplemental Type Certificate (STC) or an FAA field approval

Question 13

Under what conditions is compliance with an engine service bulletin mandatory?

Answer 13

When an AD references the service bulletin, when compliance is part of approved operating specifications for a commercial or air carrier operator, when engine or component overhaul procedures require compliance at the time of overhaul.

Question 14

If turbine blades are removed from a turbine disc, why should they be re-installed in the same location?

Answer 14

To maintain the balance of the turbine wheel

Question 15

When a turbofan or turbojet engine is shut down, what should a mechanic listen for during coast down?

Answer 15

Any rubbing sound or other unusual noises from the engine

Question 16

What criteria determines replacement of life limited turbine engine components?

Answer 16

Cycles, hours and/or calendar time

Question 17

What is the fan blade shingling?

Answer 17

A type of damage to turbine engine blades caused by sudden stoppage of the fan or by an overspeed condition. The midspan shrouds on the fan overlap rather than touch the face-to-face contact.

Question 18

What inspection should be performed on an engine that has been in a storage after having been preserved?

Answer 18

Corrosion Damage

Question 19

What purpose does an oil analysis serve?

Answer 19

Metal particles in the oil show normal/abnormal wear of the engine. This helps in evaluating the engine’s internal condition.

Question 20

A weak cylinder is found during a compression check. What must be inspected?

Answer 20

An internal cylinder inspection