Standard
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rev.09/16/03
AMT 226 – Aircraft Engine Fuel and Fuel Metering Systems
This course provides a study of aircraft engine fuel and
fuel metering systems. Topics
include: repair engine fuel system
components; inspect, check, service, troubleshoot, and repair engine fuel
systems; troubleshoot and adjust turbine engine fuel metering systems and
electronic engine fuel controls; inspect check, service, troubleshoot, and
repair reciprocating and turbine engine fuel metering systems; overhaul
carburetors; repair engine fuel metering system components; and inspect, check,
and service water injection systems. Minimum Federal Aviation teaching levels –
1, 2, 3
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Competency
Areas: |
Hours: |
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Repair
Engine Fuel System Components |
Class |
5 |
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Inspect,
Check, Service, Troubleshoot, and Repair Engine Fuel Systems |
D. Lab |
0 |
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Troubleshoot
and Adjust Turbine Engine Fuel Metering Systems and Electronic Engine Fuel
Controls |
P.
Lab/O.B.I. |
6 |
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Inspect,
Check, Service, Troubleshoot, and Repair Reciprocating and Turbine Engine
Fuel Metering Systems |
Credit |
7 |
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Overhaul
Carburetors |
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Repair
Engine Fuel Metering System Components |
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Inspect,
Check, and Service Water Injection Systems |
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Prerequisite: |
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Corequisite: |
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Course Guide
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Competency |
After completing this section,
the student will: |
Hours |
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Class |
D. Lab
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P. Lab/ O.B.I. |
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REPAIR ENGINE FUEL SYSTEM COMPONENTS |
4 |
0
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3 |
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Safety |
Follow
safety rules and guidelines. |
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Basic
fuel system |
Identify
the types of fuel systems used for aircraft. |
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Explain
the nature of and dangers of vapor lock. |
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Explain
fuel-air ratio as it pertains to engine power output. |
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Explain
the types of icing and their effect on engine operation. |
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Fuel
system components |
Identify
the component parts and operation of boost pumps. |
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Identify
the component parts and operation of fuel strainers. |
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Identify
the component parts and construction materials of fuel tanks. |
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Identify
the component parts and operation of engine driven fuel pumps. |
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Federal
Aviation Regulations |
Read and
interpret Federal Aviation Regulations and manufacturers' manuals pertaining
to engine fuel systems. |
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Fuel
system indicators |
Identify
and describe the purpose of fuel system indicators. |
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INSPECT,
CHECK, SERVICE, TROUBLESHOOT, AND REPAIR ENGINE FUEL SYSTEMS |
11 |
0
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10 |
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Engine
fuel system |
Inspect
engine fuel systems. |
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Service
engine fuel systems. |
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Troubleshoot
and repair engine fuel systems. |
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System
operation |
Check the
engine fuel system for proper operation. |
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Determine
the fuel grade required for a specific engine fuel system. |
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TROUBLESHOOT
AND ADJUST TURBINE ENGINE FUEL METERING SYSTEMS AND ELECTRONIC ENGINE FUEL
CONTROLS |
10 |
0
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0 |
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Operation |
Explain
the principles of operation of a hydro-mechanical fuel control. |
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Explain
the basics of operations for an electronic engine fuel control system. |
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Procedures |
Using
diagrams, describe the troubleshooting and adjustment procedures for turbine
engine fuel metering systems and electronic engine fuel controls. |
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INSPECT,
CHECK, SERVICE, TROUBLESHOOT, AND REPAIR RECIPROCATING AND TURBINE ENGINE
FUEL METERING SYSTEMS |
10 |
0
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23 |
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Carburetor
operation |
Explain
the effect of temperature, pressure, and humidity on the operation of a
carburetor. |
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Float
type carburetor |
Inspect,
remove, check, and install a float type carburetor. |
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Operate
engine and adjust the idle speed and idle mixture on a float type carburetor. |
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Drain the
float bowl and inspect for contaminants. |
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Turbine
engine jet fuel control |
Rig the
fuel control unit on a static turbojet engine and describe trimming of that
engine. |
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OVERHAUL
CARBURETORS |
12 |
0
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22 |
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Principles
of carburetion |
Explain
the basic principles of carburetion. |
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Float
type carburetors |
Describe
the principles of the five systems found in the float type carburetor. |
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Pressure carbure tors |
Describe
the operation of each section of a pressure carburetor. |
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Explain
the function of the vapor eliminating system. |
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Fuel injection |
Explain
the operation of the Bendix Direct Fuel Injection System. |
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Venturi |
Determine
the size of a venturi for a specific carburetor. |
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Describe
the function of a venturi. |
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Jet |
Remove,
inspect, measure, and reinstall a metering jet. |
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Describe
the function of a metering jet. |
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Air bleed |
Disassemble
a carburetor and locate an air bleed. |
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Describe
the operation of an air bleed. |
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Main
discharge nozzle |
Locate
the main discharge nozzle and describe its operation. |
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Acceleration
system |
Locate
the acceleration system in a pressure and float type carburetor. |
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Describe
the operation of acceleration system in pressure and float type carburetors. |
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Economizer
and power enrichment system |
Locate
economizer and power enrichment system in pressure and float type
carburetors. |
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Describe
the operation of the economizer and power enrichment systems. |
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Mixture
controls |
Locate
the mixture control lever on a carburetor. |
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Describe
the operation of the mixture control system. |
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REPAIR
ENGINE FUEL METERING SYSTEM COMPONENTS |
2 |
0
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2 |
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Screens |
Locate,
remove, clean, and install screens in a fuel metering unit. |
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Floats |
Identify
defective floats. |
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Float
needle and seat |
Inspect
the float needle and seat measure and adjust float level of a carburetor. |
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Carburetor
contamination |
Describe
the effect of ruptured diaphragms in a pressure carburetor. |
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INSPECT,
CHECK, AND SERVICE WATER INJECTION SYSTEMS |
1 |
0
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1 |
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Components |
Identify
the parts of a water injection system. |
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Operation |
Describe
the operation of a water injection system. |
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Suggested Resources
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Books:
Aviation
Book Company. (1988). Federal aviation regulations for mechanics. Glendale, CA: Author.
Crane, D., et al.
(1983). A & P technician powerplant textbook.
IAP, Inc. (1976). Airframe and powerplant mechanics general
handbook.
IAP, Inc. (1985). Aircraft fuel metering systems.
IAP, Inc. (1988). AC 43.13-1A-change three -- acceptable
methods, techniques, and practices: Aircraft inspection and repair.
IAP, Inc. (1990). CARACOMP the
electronic tutor: Aviation technician airframe program computer software.
IAP, Inc. (1990). FAR handbook for aviation maintenance
technicians.
Kroes, M. J., et al.
(1990). Aircraft powerplants
(6th ed.).
Otis, C. (1989). Aircraft gas turbine powerplants (2nd ed.).