Figure 3-14. Lubrication system component replacement (Sheet 2 of 2).
Section IX. ENGINE ELECTRICAL SYSTEM
The engine electrical system consists of an ignition unit, ignition lead assembly, igniter plug, starter motor assembly, oil
pressure sequencing switch, time totalizing meter and circuit breaker, exhaust gas temperature thermocouple, and a
wiring harness assembly. The starter motor assembly provides rotating power for starting the engine. The ignition unit
provides high voltage power through the igniter plug ignition lead assembly to the igniter plug to ignite the fuel mixture.
The oil pressure sequencing switch provides sequenced control of the starting cycle based on oil pressure. The time
totalizing meter records the engine operating time. The circuit breaker provides short circuit protection for the time
totalizing meter. The exhaust gas temperature thermocouple provides an electrical signal proportional to exhaust gas
temperature for the exhaust gas 'temperature indicator. The wiring harness assembly provides electrical interconnection
of the engine electrical system components.
Access to the engine electrical system components is obtained by removing the gas turbine
engine power plant access panel (fig. 1-2).
3-43. Wiring Harness Assembly
Removal. Remove wiring harness assembly as required for access to other components or for repair.
Tag or otherwise identify all connectors, terminals, and electrical leads for aid at assembly. Note routing of
harness assembly and location and orientation of clamps for aid at assembly.