Second Pilot During Phase 1

[mfleming]

Originally Posted by jcl777

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…

[Ironflight]

Originally Posted by mfleming

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…..).

[mfleming]

Originally Posted by Ironflight

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.

[bonefishdave]

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.

[jcl777]

Originally Posted by bonefishdave

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.

[blaplante]

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!