Engine upgrade

[NY86]

Re: Engine upgrade

Correct me if I'm wrong....

Since the pre-10/55 337 is approved data, no field approval is needed. Do the work, fill out the 337, attach the old 337 and (have your IA) file with OK City. Same procedure as an STC, or any approved data.

[barnstmr]

Re: Engine upgrade

Yes John,
You got it right. Thats why pre Oct.1,1955 data is good. For reference, see the attachment. This is an excerpt from FAA order 8300.10. Section 5.A.4 gives a list of sources for "Approved Data". Item (f) covers you.

Order 8300.10 has been superseded by Order 8900.1, See VOL. 4 Chapter 9 for major alterations. The wording is the same.

[Guest]

Re: Engine upgrade

Terry and John,

Yes, I think you are correct if its approved data one can just use it without prior approval.

I thought the exact same way before I wrote the post but I hedged because I misread the statement on page 15 of this link;

http://www.faa.gov/education_research/testing/airmen/test_guides/media/faa-g-8082-11a.pdf

In hindsight I misread it, it is as you say.

Dave

[whake]

Re: Engine upgrade

Terry can you tell me if it is legal to upgrade my 1945 BC12d S/N 6628 to a C-85 firewall forward with a starter. Fileing a 337 or is an STC required ? Such as the Harrer STC.

[barnstmr]

Re: Engine upgrade

Walter,
Based on the discussion of the last several posts, YES. But only if you have "approved data". So, if you can get yourself a copy of Rich Anderson's 337 or another one that was approved prior to Oct.1, 1955 then you can do it legally. Otherwise you'd have to come up with some other "approved data".

I would like to do the same on my BC12D. So how about it Rich? Are you interested in sharing your 337 with us?

[Guest]

Re: Engine upgrade

Walter,
Based on the discussion of the last several posts, YES. But only if you have "approved data". So, if you can get yourself a copy of Rich Anderson's 337 or another one that was approved prior to Oct.1, 1955 then you can do it legally. Otherwise you'd have to come up with some other "approved data".

I would like to do the same on my BC12D. So how about it Rich? Are you interested in sharing your 337 with us?

Hi Terry,

According to Rich's post the N number is "N96861 a 1946 BC12D."

Here is the publicaly availible info in the link below;

http://registry.faa.gov/aircraftinquiry/NNumSQL.asp?NNumbertxt=96861&cmndfind.x=12&cmndfind.y=13

Near the bottom of the page the is place to order the records.

You could order the aircraft records CD, the 337 will be on it.

Dave

[Guest]

Re: Engine upgrade

Just a second thought, nothing I have read in the posts so far indicates the engine model exactly.

Its called a c-85-f.

A c85-12f has a starter.

The c85-8f does not.

The approval might be for the 8f.

Dave

[Arnold Wallace]

Re: Engine upgrade

Walter,
I sent you copies of the 337 and other data such as weight and balance paperwork for my engine change on the 1946 BC12D. It was a while ago - like early last winter? Let me know if it did not arrive. N96175, C65-12 (the starter and generator installation on this plane was done right there in Florida)

[Garry Crookham]

Re: Engine upgrade

I have a copy of the CD for N96861

The referenced 337 states:

1. Removed Continental A65-8 ...................
2. Installed Continental C-85-8FJ..................
3. Removed Lewis fixed pitch wood prop.........
4. Installed McCauley metal prop.................

Note the C-85 installed was a -8FJ which is a fuel injected engine. I've discussed this installation with my PMI and he feels that there could possibly be a problem trying to use this 337 as approved data to install a C-85 without fuel injection and recommended that the change be submitted in advance for pre-approval since removing fuel injection would be considered a major alteration. It's all up to your IA and his interpretation of major vs. minor alteration. If anyone knows of a Taylorcraft that has a C-85-8F installed with a 337 dated prior to 10-01-1955 please advise since that would make it a clean install with no grey areas.

Garry Crookham
N5112M
Tulsa

[Ragwing nut]

Re: Engine upgrade

C-85-f does not denote model, only that is was originally a flanged crank engine.Missing is an 8 or 12