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  #11  
Old 01-21-2023, 10:59 AM
mfleming's Avatar
mfleming mfleming is offline
 
Join Date: Sep 2016
Location: Joseph, Oregon
Posts: 1,019
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Quote:
Originally Posted by jcl777 View Post
Before you can consider either a qualified pilot or observer pilot, the AC requires 7 documented powerplant tests, if applicable:
  1. Mixture and idle check - mix is N/A on a Rotax, and idle check is understood
  2. Magneto check - OK
  3. Cold cylinder check - is this required for a Rotax or is it N/A?
  4. Carb heat check - N/A for Rotax
  5. Fuel flow check - completed during PAP, understood
  6. Unusable fuel check - ??
  7. Compression check - required for the Rotax??
Sorry for what might be dumb or obvious questions.
Some of these terms are ambiguous.
  • Mixture and idle check - ?? Engine idles and mixture….what, against the stop?
  • Cold cylinder check - Compression test when cold…no idea

Unless there’s a FAA glossary of terms that include these, I guess whatever I document qualifies…
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Michael Fleming
Joseph, OR
sagriver at icloud dot com

RV-7 Slider #74572
Started 11/2016
Empennage completed 11/2016
Ailerons and flaps completed 3/2017.
Wings completed 12/2017
Started on QB fuselage 01/2018
Sliding canopy mostly completed 10/2020
Wiring and Avionics harness completed 9/2/2021
FWF Completed 11/1/2022
Final assembly Started 11/10/2022
Wings on 11/12/2022

N526RM

Donated for 2022 and so should you
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  #12  
Old 01-21-2023, 11:07 AM
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Ironflight Ironflight is offline
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Join Date: Jan 2005
Location: Dayton, NV
Posts: 13,310
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Quote:
Originally Posted by mfleming View Post
Some of these terms are ambiguous.
  • Mixture and idle check - ?? Engine idles and mixture….what, against the stop?
  • Cold cylinder check - Compression test when cold…no idea

Unless there’s a FAA glossary of terms that include these, I guess whatever I document qualifies…
You might check AC 90-89B - the FAA’s guide to flight testing (which is much more about ground testing before flight than it is about actual flight testing…..).
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Editor at Large - KITPLANES Magazine
RV-8 - N188PD - "Valkyrie"
RV-6 (By Marriage) - N164MS - "Mikey"
RV-3B - N13PL - "Tsamsiyu"
A&P, EAA Tech Counselor/Flight Advisor
Dayton Valley Airpark (A34)
http://Ironflight.com
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  #13  
Old 01-21-2023, 11:39 AM
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mfleming mfleming is offline
 
Join Date: Sep 2016
Location: Joseph, Oregon
Posts: 1,019
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Quote:
Originally Posted by Ironflight View Post
You might check AC 90-89B - the FAA’s guide to flight testing (which is much more about ground testing before flight than it is about actual flight testing…..).
Thank you Paul.

For others like me who may have been confused by these terms, AC 90-89B does indeed define them as well as lay out the procedures.
  • Mixture and idle check - 1-19, page 31.
  • Cold Cylinder Check - 1-19, page 32.
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Michael Fleming
Joseph, OR
sagriver at icloud dot com

RV-7 Slider #74572
Started 11/2016
Empennage completed 11/2016
Ailerons and flaps completed 3/2017.
Wings completed 12/2017
Started on QB fuselage 01/2018
Sliding canopy mostly completed 10/2020
Wiring and Avionics harness completed 9/2/2021
FWF Completed 11/1/2022
Final assembly Started 11/10/2022
Wings on 11/12/2022

N526RM

Donated for 2022 and so should you
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  #14  
Old 01-21-2023, 11:58 AM
bonefishdave bonefishdave is offline
 
Join Date: Apr 2021
Location: Fort Myers
Posts: 52
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Just like to add, the owner pilot and qualified pilot need to complete the score card matrix and meet the minimum scores. A current pilot in category and class will meet the owner pilot score.
The qualified pilot matrix score is much more demanding requiring a minimum score of 90 for experience qualifications. Per the instructions the score sheet needs to be signed and dated, and attached to the airframe logbook logbook prior to first flight.
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  #15  
Old 01-21-2023, 02:31 PM
jcl777 jcl777 is offline
 
Join Date: May 2016
Location: Kingwood, TX
Posts: 63
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Quote:
Originally Posted by bonefishdave View Post
Just like to add, the owner pilot and qualified pilot need to complete the score card matrix and meet the minimum scores. A current pilot in category and class will meet the owner pilot score.
The qualified pilot matrix score is much more demanding requiring a minimum score of 90 for experience qualifications. Per the instructions the score sheet needs to be signed and dated, and attached to the airframe logbook logbook prior to first flight.
EAA told me it actually needs to be carried in the plane for each such flight.

Last but not least, of course, the ops limits have to have the magic language specified in the AC that permits such flights.

Unless operating in accordance with Advisory Circular (AC) 90-116, Additional Pilot Program for Phase I Flight Test, during Phase I flight testing, only the minimum crew necessary to fly the aircraft during normal operations may be on board.
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Kingwood, TX
RV-12iS, N221TF, #121130
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  #16  
Old 01-23-2023, 11:03 PM
blaplante blaplante is offline
 
Join Date: Jan 2010
Location: Southern California
Posts: 556
Default Compression Test

Far from authoritative
http://forums.matronics.com/viewtopic.php?p=238128

But, the point is, there is, somewhere, an official specification for minimum Rotax "compression" and it is done via a leakdown test. Using a tool such as https://aircraft-tool.com/shop/detai...ookieSupport=1

I would think the point of the requirement is to help insure that when 'ol Joe overhauled the used engine in his barn... that the engine might actually make something like rated power on takeoff. Now most likely you have a brand new engine, so this is just a formality, but this test needs to be part of your annual inspection, so buying the equipment is a long term investment.

Also, don't get over confident that the engine shop etc. didn't make a mistake. I know of a case where an engine overhaul shop installed the cam a tooth off of proper timing. Gee this new engine is kinda gutless.... Stuff Happens!
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