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IO-390-D Series Engine Maintenance Manual
IO-390-D Series Engine Maintenance Manual
1. General
This Airworthiness Limitations chapter sets forth each mandatory replacement time,
inspection interval, and related procedure required for type certification. The
Airworthiness Limitations chapter is FAA approved and specifies maintenance required
under §§ 43.16 and 91.403 of the Federal Aviation Regulations (FAR) unless an
alternative program has been FAA-approved.
2. Mandatory Inspection - Fuel Injector Lines
At every 100 hours of operation and after any maintenance has been done on the engine
where the fuel injector lines have been disconnected, moved or loosened, examine the
fuel lines per the "Fuel Line Inspection" procedure in Chapter 73-10 of this manual.
3. Mandatory Inspection - Exhaust Valve and Guide
At every 1000 hours of operation for IO-390-D Series engines, examine the exhaust valve
and guide conditions. Refer to the section "Exhaust Valve and Guide Inspection" in
Chapter 72-30.
© 2020 Avco Corporation. All Rights Reserved
March 2020
AIRWORTHINESS LIMITATIONS
Airworthiness Limitations
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