y. Secure tester after operation in ac-
b. Engine Thermocouples Out of Calibra-
or More Engine Thermocouples
tion. When the engine thermocouples are sub-
jected to strong reducing or oxidizing atmos-
Engine Paralleling Harness.
pheres for a period of time, they will drift ap-
a. Engine Thermocouples Inoperative.
engine parrallel harnesses when individual engine
This error is found in the regular testing of
thermocouples can be removed, the engine ther-
mocouples may be bench checked individually
using one heater probe connected to the tester in
lead wire in the engine paralleling harness or a
short to ground. If the trouble is a short to
where individual thermocouples can not be re-
ground, the thermocouple current can leak off
moved, the entire thermocouple harness should
and never show on the aircraft EGT indicator.
be removed for bench check.
However, this grounded condition can be found