Wiring Inspection - Lycoming TEO-540-C1A Maintenance Manual

TEO-540-C1A Engine Maintenance Manual
TEO-540-C1A Engine Maintenance Manual

1. Wiring Inspection

CAUTION USE CAUTION AROUND THE WIRING HARNESS, SENSORS AND
ACTUATORS. THEY CAN BE EASILY DAMAGED AND CANNOT BE
REPAIRED. IF ANY OF THESE ITEMS ARE DAMAGED, THEY MUST BE
REPLACED. IF ONE WIRE BREAKS ON THE WIRING HARNESS, THE
COMPLETE HARNESS WILL NEED TO BE REPLACED.
NOTICE: This inspection procedure applies to either of the wiring harnesses (engine-to-firewall,
fuselage harness, and the airframe interface wiring harness).
A. Examine the wiring on each harness for correct routing, security, clamping, deterioration,
damage, wear, fraying, chafing or breaks in accordance with the airframe manufacturer's
instructions.
B. Look for heat damage on the wiring and on the engine in galleys and behind lights. Though a
visual inspection of the wiring harness can identify heat damage, burnt wire, vibration
damage, or chafing, a more detailed inspection is necessary to identify cracked insulation,
arcing, and worn insulation. Identify and correct the cause of any heat damage.
NOTICE: There must not be any repairs or splices on the harness. Replace the harness if
repairs or splices are found.
C. Replace the harness if there is damage to the wiring and connectors that came in contact with
the chemicals and fluids:
(1) Hydraulic fluid
(2) Battery electrolytes
(3) Fuel corrosion inhibiting compounds
(4) Waste system chemicals
D. Replace the harness if any of the following conditions are found on the harness.
(1) Broken, frayed, chafed, worn,
degraded or damaged wire
(2) Repairs or splices
(3) Heat damage or burnt wire
E. Examine all of the wiring connections and accessories for physical damage and security.
Refer to Appendix B in this manual for wiring harness connections.
CAUTION
F. Examine each connector for the sensors and actuators on the harness. If a connector is
damaged, replace the harness.
G. Examine the harness connector and airframe receptacles for the aircraft interface and
airframe power. Look closely at the pins and sockets. If a receptacle is damaged, repair or
replace the receptacle as per the airframe manufacturer's instructions.
H. To replace damaged cables or clamps, refer to the aircraft manufacturer's instructions.
I. Examine the terminals for correct installation, tightness, and cleanliness. Wipe away dirt on
the terminal. Tighten terminals as per the torque values in the Standard Torque Tables in the
latest revision of the Service Table of Limits - SSP-1776.
© 2018 Avco Corporation. All Rights Reserved
November 2018
72-70 - ELECTRICAL SYSTEM MAINTENANCE
ANY TIME AN ELECTRICAL CONNECTOR IS DISCONNECTED,
INSTALL A CAP ON THE CONNECTOR TO PREVENT DAMAGE OR
CONTAMINATION FROM FOD, CHEMICALS, OR FLUIDS.
(5) Cleaning agents
(6) De-icing fluid
(7) Paint
(4) Vibration damage or chafing
(5) Cracked or worn insulation
(6) Arcing
(7) Broken or damaged sensor connector
72-70
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