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

How may an engine be visually identified?

Answer 2

By the engine data plate.

Question 3

What may be used as a guide for 100-hour inspections on aircraft engines?

Answer 3

Manufacturers maintenance manuals and FAR part 43, Appendix D.

Question 4

What additional inspection must be performed if a cylinder compression is weak?

Answer 4

An internal cylinder inspection.

Question 5

Name at least one place where engine operating limitations may be found.

Answer 5

(1) Type certificate data sheet; (2) Engine specification; (3) Engine manual; (4) Aircraft manufacturer’s maintenance manual

Question 6

How does an oil analysis program help to evaluate the internal condition of an engine?

Answer 6

By identifying each wear metal and the quantity present in the oil.

Question 7

Name at least one type of FAA approval required when a change to an engine type design is not enough to acquire a new type certificate.

Answer 7

(1) A supplemental type certificate; (2) A field approval under a minor change in type design

Question 8

Why should a aircraft engine be inspected when it is removed from storage after having been preserved?

Answer 8

To determine whether or not it has sustained corrosion damage.

Question 9

What publication is needed to inspect an engine for confirmity with specifications?

Answer 9

The engine specifications or type certificate data sheet.

Question 10

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

Answer 10

The manufacturer’s maintenance manual.

Question 11

What is the purpose of a hot section inspection of a turbine engine?

Answer 11

To determine the integrity of hot section components.

Question 12

When is an aircraft engine service bulletin is mandatory.

Answer 12

(1) When it is part of an airworthiness directive (AD); (2) When compliance is part of the approved operating specifications for a commercial operator; (3) When engine or component overhaul procedures require compliance at the time of overhaul.

Question 13

What is fan blade shingling?

Answer 13

Fan blade shingling is the overlapping of the midspan shrouds of the fan blades.

Question 14

What publications are needed to perform a turbine engine overspeed inspection?

Answer 14

The manufacturer’s maintenance publications.

Question 15

What is required after a turbine engine experiences exhaust gas temperature exceeding limits?

Answer 15

A hot section inspection.

Question 16

Name at least one place where a list of life limited parts may be found.

Answer 16

(1) The type certificate data sheet; (2) The Airworthiness Limitations Section of the Instructions for Continued Airworthiness

Question 17

What criteria are used to determine the replacement of life limited turbine engine components?

Answer 17

Cycles, hours, or calendar time.

Question 18

What inspection should be accomplished during the coastdown after shutdown of a turbofan or turbojet engine?

Answer 18

Listen for an audible rubbing sound or other unusual noises from the engine.

Question 19

When removing turbojet or turbofan turbine blades, why is it important that they be installed in the same location?

Answer 19

To maintain the balance of the turbine wheel.

Question 20

What items must be included in the operational check of a reciprocating engine prior to approval for return to service after a 100-hour inspection?

Answer 20

(1) Power output (static and idle RPM); (2) Magnetos; (3) Fuel and oil pressure; (4) Cylinder and oil temperature