A compilation of key maintenance and performance …mooney.free.fr/Sauvegarde...
Transcript of A compilation of key maintenance and performance …mooney.free.fr/Sauvegarde...
Lycoming Flyer Key Reprints
A compilation of key maintenance and performance articlestaken from the former Lycoming “Flyer” Newsletter
L y c o m i n g F l y e r �
Lycoming FlyerD e a r C u s t o m e r ,
O u r K e y R e p r i n t s i s o n e o f L y c o m i n g ’ s m a n y u n i q u e a s p e c t s t h a t m a k e o u r c o m p a n y s p e c i a l . F o r t h o s e w h o h a v e b e e n i n a v i a t i o n a l o n g t i m e a n d f o r t h o s e w h o a r e j u s t d i s c o v e r i n g g e n e r a l a v i a t i o n ’ s w o n d e r s , f u n , a n d e x c i t e m e n t , y o u w i l l q u i c k l y r e a l i z e t h a t o u r e n g i n e s a r e t r u l y l i v i n g o r g a n i s m s . A s w i t h a n y l i v i n g o r g a n i s m , b e t t e r u n d e r s t a n d i n g a n d c a r e o f t h e p r o d u c t w i l l e n s u r e m a x i m u m p e r f o r m a n c e f o r e v e r y f l i g h t a n d f o r t h e l i f e o f t h e e n g i n e .
F o r o v e r 7 5 y e a r s L y c o m i n g h a s b e e n d e s i g n i n g , t e s t i n g , a n d a s s e m b l i n g e n g i n e s . A s a c o m p a n y w e h a v e a b o d y o f k n o w l e d g e a b o u t o u r p r o d u c t s u n p a r a l l e l e d i n t h e i n d u s t r y . W e t h u s h a v e a r e s p o n s i b i l i t y t o s h a r e t h i s k n o w l e d g e w i t h y o u a n d h o p e y o u l e a r n a s m u c h a s p o s s i b l e a b o u t h o w o u r p r o d u c t s w o r k a n d t h e n e c e s s a r y c a r e a n d f e e d i n g o f e a c h m o d e l . L y c o m i n g ’ s K e y R e p r i n t s i s o u r e f f o r t t o c o n t i n u a l l y s h a r e o u r b e s t p r a c t i c e s , k e y l e s s o n s , a n d e n g i n e s s y s t e m s k n o w l e d g e t o e m p o w e r o u r c u s t o m e r s .
P l e a s e e n j o y L y c o m i n g ’ s K e y R e p r i n t s . R e a d , l e a r n , a n d b u i l d o n y o u r b o d y o f k n o w l e d g e a b o u t h o w o u r e n g i n e s l i v e a n d b r e a t h e . T o k n o w m o r e a b o u t o u r e n g i n e s a n d h o w t o c a r e f o r t h e m , w i l l n o d o u b t m a k e b e t t e r p i l o t s a n d m a i n t e n a n c e p r o f e s s i o n a l s a r o u n d t h e w o r l d .
A f e l l o w p i l o t ,I a n W a l s h V i c e P r e s i d e n t & G e n e r a l M a n a g e rL y c o m i n g E n g i n e s
� L y c o m i n g F l y e r
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I N D E X
G E N E R A L Facts About the Flyer and Key Reprints
Some Definitions of Terms
How to Get Lycoming Engine and Accessory Maintenance Publications
Determining Engine Condition of High-time Piston Power Plants
Questions Asked by Pilots and Mechanics
Definitions Applicable to TBO, Engine Replacement and Engine Rebuild
Oil Analysis
What is an Aerobatic Engine?
Low-compression Engine — Grade 100 Aviation Fuel
Fuel Contamination
Do Not Use Automotive Gasoline in Lycoming Aircraft Engines
Let’s Talk Turbocharging
Information About Lycoming-approved, Full-flow Oil Filters
Detonation and Preignition
Nitriding — What is it?
Compression Ratio — An Explanation as it Relates to Lycoming Engines
“Watts” Horsepower
Cutaway of a Four-cylinder Power Plant
Your Engine and the Fixed-pitch Propeller
Induced Engine Damage
The Whistle Slot
Welding is not Recommended
Engine Balance
Fuel Injector or Carburetor
The “Same Engine” Myth
The Unfortunate Choice
Low-time Engine May Not Mean Quality and Value
In Search of Badly Behaving Baffles and Seals
The articles contained herein are not intended to supersede manufacturers’ service publications, instructions or manuals or any other official publications, but are provided in order to augment or explain in pilot’s or mechanic’s language these publications, as well as provide other supplemental helpful information for our customers and operators.
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O P E R A T I O N S
Hard Facts About Engine Break-in
Leaning Lycoming Engines
Proper Leaning at Cruise Aids Safe Flight and Saves Dollars
Operating the Direct-drive Fixed-pitch Lycoming Engine
Operating Your Lycoming Engine at Takeoff and Climb
The Exhaust Gas Temperature (EGT) and Fuel Management
Landings and Takeoff from High-elevation Airports
Basic Power Sequence
An Explanation of Power Settings
Considerations for Low-power Low-RPM Cruise
Induction Icing
Cold-weather Operations
National Transportation Safety Board Warning on Simulated Engine-out Maneuvers
Importance of the Cylinder Head Temperature
More on Cylinder Head Temperature
Interpreting Your Engine Instruments
Engine Starting Suggestions
Use of Fuel Boost Pumps with Lycoming Engines
Avoid Sudden Cooling of Your Engine
Sticking Valves — Do Not Neglect the Warning Signs
Operational and Maintenance Procedures to Avoid Sticking Valves
Tips from the Hangar
The Pilot and Turbocharging
TBO Tradeoffs or Tips from Fred
Thieves of Aircraft Engine Power
Wet Air Effect on Engine Power
Frequency of Flight and Its Effect on the Engine
A Review of Old Wives’ Tales
Spark Plug Fouling
Engine Instruments: To Believe or Not to Believe
Oil Flow — Screens, Filter, Cooler and Pressure Relief
Test Your Knowledge on Engines
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M A I N T E N A N C E
Mechanic’s Creed
The Basics Of Maintenance in General Aviation
Ask About Reference Publications Before Your Engine is Taken Apart
Air Filter Maintenance
Oil and Your Engine
Oil and Filter Change Recommendations
More About Oil and Your Aircraft Engine
Maintaining Oil Levels of Wet Sump Engines
Tips for Changing Your Spin-on Oil Filter
Suggestions if Metal is Found in the Screens or Filter
Safety Tip — Sealant Use
Understanding Engine Color Codes
Reciprocating Engine Break-in and Oil Consumption Limits
Compression Check as a Maintenance Aid
Spark Plugs — Key To Smooth Engine Operation, I
Spark Plugs — Key To Smooth Engine Operation, II
Is Your Spark Plug Connector Overtorqued?
Why Rotate Spark Plugs?
Maintenance Suggestions From the Lycoming Service Hangar
Engine Hoses
Checking and Adjusting Dry Tappet Clearance on Lycoming Engines
Some Tips on the Lycoming O-235 Engine
Importance of the Correct Base Nut Tightening Procedure
Fuel Injector Nozzles Have Been Improved
Unauthorized Additions to Your Engine Can Cause Trouble
A Simple Check of Internal Engine Timing
Installation of Counterweight Rollers
Safety Notes
Engine Suggestions for Operators
Recommendations for Aircraft or Engine Struck by Lightning
Recommendation Regarding Use of Incorrect Fuel
Propeller Ground Strike or Sudden Stoppage Can Be Dangerous
Keep Your Direct-drive Engine Starter Clean to Avoid Trouble
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Notes on Replacing Connecting Rods or Pistons
Does Your Nose Seal Leak?
Cam and Tappet Wear
Exhaust System Maintenance — Pay Now or Pay Later
High Time Cylinders
Top Overhaul?
Lycoming Model Codes for Reciprocating Engines
F R E Q U E N T L Y A S K E D Q U E S T I O N S Lycoming Overhaul Engine FAQ
Lycoming Cylinder Kit FAQs
Lycoming Roller Tappet Technology FAQs
Lycoming-IO-390 FAQs
Lycoming-IO-580 FAQs
� L y c o m i n g F l y e r
Lycoming has been pleased and impressed by the number of requests for copies of the “Key Reprints”
— pleased by your many favorable comments concerning it, and impressed by the thirst for knowledge
by operators of General Aviation aircraft engines.
In the event a reader perceives a conflict between the content of these articles and the content of the
current manuals, service bulletins or service instructions, the latter items govern, but the reader should
contact Lycoming Service and bring such a conflict to our attention. The service bulletins and parts of the
manuals are FAA approved; these articles are not.
Some of the articles published are based on information contained in Service Bulletins, Service
Instruction, and Service Letters. In addition, other articles are taken from actual field test data car-
ried on by Lycoming personnel. Furthermore, the Lycoming factory is a central collecting agency
on its aircraft engines in the field. Experiences and information from all over the world provide
feedback that is recorded and analyzed. We share this information with our readers in the Flyer
and Key Reprints.
During the preparation process of each article and as each subsequent re-issue updating of information
is part of the procedure. After articles are written, each one is carefully screened and checked by man-
agement, engineering and service personnel to ensure accuracy before being released for publication.
The Flyer does not have an established publishing date for each issue. The latest issue is Number ��.
The original concept of the Flyer has not changed since the first issue was published in �9��. Approximately
8�% of the prepared text deals with technical information related to Lycoming engines, and the remaining
��% covers general newsworthy items. Distribution of the Flyer is made to owners and operators of
Lycoming powered aircraft, authorized distributors and others who write us and request that we place
them on our mailing list, with all costs of printing and mailing absorbed by Lycoming. It is the intention
of Lycoming to continue to make available service, maintenance and operational data in the Flyer and
Key Reprints to assist the owner and operator in improving their engine’s performance and reliability.
This material is copyrighted under the laws of various countries including the United States and Canada.
No reproduction is authorized. Violation of copyright laws may render unauthorized copiers subject to
penalties of up to $�0,000.00 per unauthorized copy.
S T A T E M E N T O F C O P Y R I G h T