Step 9. Required Inspections During Break-In (50-Hour Operation) - Lycoming TEO-540-A1A Installation And Operation Manual

TEO-540-A1A Engine Installation and Operation Manual
CAUTION
8. Decrease altitude at low cruise power and closely monitor the engine instruments. Do not
make long descents at low manifold pressure. Do not decrease altitude too rapidly. The
engine temperature could decrease too quickly.
9. After landing and shutdown, examine the engine for oil and fuel leaks. Identify and correct
the cause of any leak.
10. Calculate oil consumption and compare the limits given in Appendix A.
11. If the oil consumption value is above the limits in Appendix A, identify and correct the cause.
Complete this flight test again, up to and including this step before releasing the aircraft for
service.
12. Refer to the Chapter 12-10 of the TEO-540-A1A Series Engines Maintenance Manual to
complete the "Oil Change Procedure" – drain the ashless dispersant oil and add new ashless
dispersant oil up to the specified oil sump capacity in Appendix A. (Ashless dispersant oil is
used during and after break-in for turbocharged engines.)
13. Complete the inspections identified in the "Step 9. Required Inspections During Break-In
(50-Hour Operation)" section in this chapter.
14. Correct any problems before releasing the engine back into service.
15. Continue to operate the engine at cruise power settings of 65% to 75% for 50 hours or until
oil consumption stabilizes.

Step 9. Required Inspections During Break-In (50-Hour Operation)

During the next 50 hours of flight, complete the following inspections per Chapter 05-20 in the
TEO-540-A1A Series Engines Maintenance Manual:
• Visual Inspection
• 10-Hour Initial Engine Inspection Checklist
• 25-Hour Engine Inspection Checklist
• 50-Hour Engine Inspection Checklist
© 2018 Avco Corporation. All Rights Reserved
October 2018
FOR ENGINES THAT HAVE DYNAMIC COUNTERWEIGHT
ASSEMBLIES, DO NOT OPERATE AT LOW MANIFOLD PRESSURE
DURING HIGH ENGINE SPEEDS UNDER 15 IN. HG AND RAPID
CHANGES IN ENGINE SPEEDS. THESE CONDITIONS CAN CAUSE
DAMAGE TO THE COUNTERWEIGHTS, ROLLERS OR BUSHINGS,
AND CAUSE DETUNING.
DO NOT MAKE CLOSED THROTTLE DESCENTS WHICH CAN CAUSE
RING FLUTTER AND DAMAGE TO THE CYLINDERS AND PISTON
RINGS.
0.006 x BHP x 4 ÷ 7.4 = Qt./Hr.
Engine Initiation
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