Turbine Engine Troubleshooting

Army Aircraft Gas Turbine Engines
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b. Temporary storage. An engine that will not be operated

for over 14 days, but less than 45 days, must be placed in temporary

storage. Engines normally falling in this category are those

undergoing minor repair or modification, awaiting assignment or

disposition, being held in operational reserve, or any other

condition which requires idleness for a period not to exceed 45 days.

c. Extended storage. An engine that will be inactive for

more than 45 days, but not exceeding 180 days, must be preserved and

maintained in extended storage. Usually, this includes those engines

undergoing major repair or modification, those declared surplus and

awaiting final disposition, or any other circumstance that would

warrant idleness for 45 to 180 days.

NOTE

Permanent storage is a depot level function.

ENGINE PRESERVATION GENERAL. All preservation procedures require

that any accumulation of dirt be removed from the engine with dry

cleaning solvent. Under usual conditions, it will not be necessary

to clean the entire external surface of the engine. If necessary,

perspiration residues can be removed from close tolerance bare metal

surfaces by wiping with a clean cloth dampened in fingerprint remover

before cleaning with solvent.

CAUTION

To prevent oil contamination, never mix

syntheticbase oils with mineralbase oils.

Syntheticbase lubricating oil is required for

the engine. Only a syntheticbase corrosion

preventive oil can be used to spray the

3.14.

TURBINE ENGINE TROUBLESHOOTING

Engine malfunctions can be recognized and diagnosed by

comparing actual engine instrument reading with normal readings. To

aid maintenance personnel in engine troubleshooting, the engine

technical manual has troubleshooting charts to analyze, isolate, and

correct engine malfunctions. Proper utilization of the

troubleshooting charts will save time, provide a logical method of

isolating the causes of malfunctions, and eliminate the unnecessary

replacement of parts. Figure 3.11 explains how to use the

troubleshooting charts.