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Maintenance Practices for Fuel and Oil Systems - Vol. 3

1-1. PURPOSE. This volume provides general infor- 
mation pertaining to the maintenance practices for fuel 
and oil systems. Specific maintenance practices are 
found in the individual aircraft maintenance manuals. 
This volume is of maximum benefit to the mechanic who 
desires information about fuel and oil identification, con- 
tamination, handling, storage, and fuel and oil system 
maintenance. This volume furnishes the mechanic a 
source of information about how to perform various me- 
chanical functions which are used on all aircraft. This 
volume is not a requisitioning authority, and applicable 
repair parts and special tool lists should be consulted to 
obtain the unit of issue and Federal Stock Number of the 
items required for maintenance.

2-1. GENERAL. The fuel system supplies fuel to the 
carburetor or fuel control under all conditions of ground 
and air operation. Identification, contamination, and 
general maintenance practices will be covered in this 
chapter. 
2-2. SAFETY PRECAUTIONS AND PROCEDURES. 
The safety precautions and procedures below are only 
minimum requirements for average conditions. All per- 
sonnel who are required to service, maintain, or repair 
fuel systems should observe the precautions described 
in the following paragraphs. 
a. Fuel Lines and Drains. Keep all fuel vents and 
drains clean and open. 
b. Tools. Use only sparkproof hand or air power 
tools in the maintenance of fuel systems. 
c. Tool Boxes. Rubber wheeled tool boxes inside 
the fuel cell repair area shall be bonded to the aircraft 
and grounded. Tool boxes, except those mounted on 
rubber wheels, shall remain outside the fuel cell repair 
area. Tools required to perform maintenance shall be 
hand-carried to the aircraft in nonmetallic containers, 
such as cardboard boxes or canvas bags. Tool boxes 
locked and secured in storage racks need not be re- 
moved from the fuel cell repair area providing they re- 
main locked and in the storage racks.