Power Box And Pma - Lycoming TEO-540-C1A Maintenance Manual

B. Alternator Belt Installation
(1) Install the alternator belt in the alternator belt groove on the starter ring gear support.
(2) Install the alternator belt in the groove on the alternator pulley (Figure 1).
(3) Adjust the alternator belt tension. Refer to the "Alternator Belt Tension
Check/Adjustment" procedure in this chapter.
(4) Torque the bolts that attach the alternator adjusting link to the alternator and to the
crankcase to (Figure 5) to 17 ft.-lb. (23 Nm).
(5) Install safety wire/cable on the cotter pins and bolts on the alternator adjusting link as
shown in Figure 4 per the latest revision of Service Instruction No. SI-1566.

7. Power Box and PMA

A. The power box does not have regularly scheduled maintenance procedures. The power box is
not field repairable. It only can be replaced.
B. The Permanent Magnet Alternator (PMA) does not have regularly scheduled maintenance
procedures. The PMA is not field repairable.
8. The Electrical System Includes Three Wiring Harnesses (Figure 7):
• Engine-to-firewall wiring harness - attaches to the engine and connects to the fuselage wiring
harness through firewall connectors.
• Fuselage wiring harness - attaches to the ECU and power box; also attaches to the engine-to-
firewall wiring harness through firewall connectors.
• Airframe interface wiring harness - supplied by the airframe manufacturer and connects
aircraft power to the power box; it is the engine-to-operator interface (airframe avionics,
ignition).
NOTICE: Refer to Appendix B for wiring harness designations.
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TEO-540-C1A Engine Maintenance Manual
TEO-540-C1A Engine Maintenance Manual
Figure 7
Wiring Harness Diagram
© 2018 Avco Corporation. All Rights Reserved
November 2018