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  #1  
Old 02-02-2019, 05:02 PM
ron sterba ron sterba is offline
 
Join Date: May 2007
Location: salem Oregon
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Question Condition inspection RV9A/ compression tests.

Working on my condition inspection in my logbook for engine I have a note with my compression tests from last year that indicate satisfactory with AC 90.116-98. I wanted to read that but I cannot find it I am assuming it is a advisory circular. When checking on the Internet I show no results found. After checking my Lycoming manual I am not finding a set of values for compression test. Help! Ron in Oregon
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  #2  
Old 02-02-2019, 05:59 PM
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RV6_flyer RV6_flyer is offline
 
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Quote:
Originally Posted by ron sterba View Post
Working on my condition inspection in my logbook for engine I have a note with my compression tests from last year that indicate satisfactory with AC 90.116-98. I wanted to read that but I cannot find it I am assuming it is a advisory circular. When checking on the Internet I show no results found. After checking my Lycoming manual I am not finding a set of values for compression test. Help! Ron in Oregon
Here is a link to the Lycoming website that has the instructions for a compression check. The instructions are given in latest version of Service Instruction 1191.
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  #3  
Old 02-02-2019, 06:07 PM
Bicyclops Bicyclops is offline
 
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This is mostly aimed at Continental engines but makes good sense for Lycomings as well:
https://www.avweb.com/news/savvyaviator/188758-1.html

The TCM service bulletin gives more guidance than the Lycoming SB about how to interpret the results of the compression test.

Ed Holyoke
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Old 02-02-2019, 09:48 PM
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Mycool Mycool is offline
 
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That was a great article, thanks for sharing Ed.
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Old 02-03-2019, 01:39 PM
ron sterba ron sterba is offline
 
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Thanks Gary and Ed, excellent reading I might add! Perfect for my #s. /80. Just curious any body know whatAC 90.116-98 is or was. Thanks
Cheers
RV9A
RON in Oregon
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Old 02-03-2019, 02:48 PM
krw5927 krw5927 is offline
 
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Ron, you probably wrote "AC 90.116-9B", not "-98". AC 90.116 is the Advisory Circular on the Additional Pilot Program (guessing you took advantage of this since there are notes as such in your logbook).

Section 9B is "Powerplant Testing". No instructions for compression check, just guidance that you should perform one.
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Old 02-05-2019, 05:10 PM
ron sterba ron sterba is offline
 
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Thanks Kurt, so “8” is a “B” and it is in fact a Advisory Circular. You pushed my button of Curiosity on taking advantage of 90.116. What’s special here?��
Ron RV9A twin Dynon Skyviews
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