IO-390-D Series Engine Maintenance Manual
© 2020 Avco Corporation. All Rights Reserved
74-30
March 2020
Page 279
IO-390-D Series Engine Maintenance Manual
74-30 - IGNITION SYSTEM –
ELECTRONIC IGNITION SYSTEM / MAGNETO MAINTENANCE
Lycoming Electronic Ignition System (EIS)
Figure 1
Electronic Ignition System
1.
EIS Inspection
A.
Examine all wires connected to the EIS for correct routing, security, clamping,
deterioration, damage, wear, fraying, chafing or breaks. Replace any deteriorated,
damaged worn, frayed, chafed, or broken wires.
B.
Examine the EIS for oil leaks. Identify and correct the cause.
C.
Examine the EIS manifold pressure line (Figure 1) connection to the manifold pressure
port (Figure 2) for general condition and security.
Figure 2
Manifold Pressure Port
