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Propeller on 415E, C-85-12F

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13 Jul 2020 16:35 #1 by Matt Gunsch
Replied by Matt Gunsch on topic Propeller on 415E, C-85-12F
Looking at the prop Type Certificates they appear to be used on both the C-90 and O-200, however, because it is an STC, the STC holder or a DAR/DER would have to approve any deviation from the STC.
rgl.faa.gov/Regulatory_and_Guidance_Libr...dc79/$FILE/P-918.pdf

rgl.faa.gov/Regulatory_and_Guidance_Libr...ebdf/$FILE/P-842.pdf

A&P, IA, PPSEL
30+ years GA and Warbird Maint
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13 Jul 2020 12:34 #2 by Patrick McNamara
Replied by Patrick McNamara on topic Propeller on 415E, C-85-12F
Matt,
I purchased a 1966 A-2 with a C90-16 engine which I plan on installing a 0200A. I have to get the STA which states I need to replace my McCauley 1b90/cm7150 for a 1a101/6948. Can I not use what I have or must I replace what I have with 1a101/6948. My propeller is good. What am I missing. Thanks for your comments.

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17 Jun 2020 19:42 #3 by Matt Gunsch
Replied by Matt Gunsch on topic Propeller on 415E, C-85-12F
per the Type certificate
Fixed pitch metal, McCauley 1A90CF or 1B90CM +12 lbs. (-32)
Eligible on Models M10, A2, A2-A, 415-D (per note 4(b)), E, G, F-1 and F-1A.
Static r.p.m. at maximum permissible throttle settings:
For Models 415-D, E, or G: not over 2225, not under 2025

A&P, IA, PPSEL
30+ years GA and Warbird Maint
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12 Jun 2020 15:38 #4 by Larry Snyder
Replied by Larry Snyder on topic Propeller on 415E, C-85-12F
Yes it’s a 70 inch prop with a 52 inch pitch. Pretty much a cruise prop, I believe.

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12 Jun 2020 14:30 #5 by Phil Work
Propeller on 415E, C-85-12F was created by Phil Work
Hi All,
I am working on purchase of a really nice 415E down in South Carolina. As stated above, has the C-85-12F engine. Last entry in prop log shows prop to be a McCauley 1B90CM7052. It's handwritten in there. I cannot find any references to this prop. Is that a misnomer? Is it supposed to be (last four digits) 7152? That is a cruise prop, correct? Thanks for any help with clarifying!

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