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Personnel performing maintenance on gas turbine engines must observe the precautions stated in the applicable engine manual. Disregarding these warnings and precautionary measures can result in serious injury, illness, or death. The following subparagraphs discuss some of the precautions that must be taken while performing engine maintenance.

a. Use of lubricating oil. Prolonged contact with lubricating oil may cause a skin rash. Skin and clothing that come in contact with lubricating oil must be thoroughly washed immediately. Saturated clothing should be removed without delay. Areas in which lubricating oil is used must be ventilated to keep mist and fumes to a minimum. Because lubricating oil can soften some paint, oil spilled on painted surfaces must be promptly and thoroughly washed off.

b. Cadmium plated tools. Be sure tools used on engine are not cadmium plated. The cadmium plating on tools chips off, and oil contaminated with cadmium chips can cause magnesium parts to deteriorate.

c. Handling of parts. When handling combustion chamber internal parts that have been exposed to fuels containing tetraethyl lead compounds, be sure that the poisonous lead-oxide residue is not inhaled or taken into the body through cuts or other external openings. If accidental exposure occurs, flush the affected area thoroughly with clear water and obtain immediate medical attention. Gloves and a face mask should be worn at all times when handling parts contaminated by lead oxide. hi addition bearings must be handled with special care. Gloves must be worn to prevent skin oil and acid from etching the bearing surface.

d. Marking on high-temperature materials. Using marking materials such as a common lead pencil on metals subject to high temperatures can cause the metal parts to crack. Approved marking materials are specified in the applicable engine manual. Only these marking materials are authorized for use.

e. Performing maintenance while engine is operating. Maintenance personnel must use caution when performing maintenance on operating engines. Because of the high temperature and velocity of the exhaust gases, personnel must stay clear of exhaust areas. Turbine intake areas are also a hazard. Large jet engines have been known to suck men into the engine. The smaller turbine engines in Army aircraft are capable of picking up small objects that are close to the intake. Anyone working around turbine engines should remove headgear and loose articles such as pens and pencils from shirt pockets. Figure 3.6 shows the exhaust-blast area of an OV-1 aircraft, to be avoided when the engine is running.

Exhaust - Blast Area
Figure 3.6. Exhaust - Blast Area.



David L. Heiserman, Editor

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Revised: June 06, 2015