PA-22 STC for 320-B

[Throttle Pusher]

OK
Ive checked with Wag aero and thier stc is only for the 150 hp eng.
Any one know of a stc for the O-320-B for the PA-22.Mine is a 1952 model.
Thanks for the help.
Ken

[51-pa22]

Quick question
can one obtain the STC for an O-320(no suffix) or O-320-A Yes.

now can one modify this engine for a 10hp improvement via a log book entry????
I think Steve said yes. Must follow Lycoming's specifications.

Confirm with YOUR IA that will sign off Your O-320-A installation.
Again assuming one is using a narrow deck O-320-B

Steve, can you confirm????

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[Steve Pierce]

I believe the engine can be converted to a B from an A with a logbook entry but as far as an STC change I think it would require a field approval. The FSDO can approve up to a 10% horse power gain so it is doable.

[Throttle Pusher]

I'm takeing out a 290-D2 and installing the 320-B.
Wag aero has a stc for the colt for the 320-B
and one to go from a 290=D2 to a 320-A on the PA-22, but not for the B engine.
I thought this was strange becouse the A engine is listed as an alternate
on the type cert. so you dont need an stc, only if you go to the B eng.
I think its strange that I would need a field appoval for a engine that
is normaly put on that same airframe only a couple of years later.
I'm just trying to find a stc or maybe a copy of some one's 337 field approval
that had already done this install.(to help with my field approval if I cant find a stc)
Ken

[Steve Pierce]

I'm not clear on what STCs Wag Aero has. They have an STC to install an O-320-B series? If you are using an STC to install the O-320-A series then I would get a field approval to use the B series instead of the A. It can be field approved by the FSDO because there is no more than a 10% increase. Use the STC for the Flight Manual Supplement etc. and the field approval for the substitution of engine models. I would talk to your Primary Maintenance Inspector prior to purchasing an STC however.

[51-pa22]

TP
What year is your PA-22/serial number?
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[Throttle Pusher]

Pa-22 1952, 22-722

[Steve Pierce]

VI - Model PA-22-160, 4 PCLM (Normal Category), Approved August 27, 1957
Model PA-22-160, 2 PCLM (Utility Category), Approved August 27, 1957 (See NOTE 3)

Serial Numbers Eligible 22-2378, 22-2425 and up (Normal Category). See NOTE 3 for Utility Category.

We have serial number 22-83 with a 150 hp O-320 per the J. A. Myers STC and it doesn't include the 160 hp engines.

[Steve Pierce]

Look at the bottom of this thread and there are two more STC's that might cover the B. Please let us know what you find out. http://www.shortwingpipers.org/forum/showthread.php?5036-STC-Pacer-135-to-Pacer-150/page2&highlight=Copper+River+Airmotive

[Throttle Pusher]

I'm not the only one to upgrade to the 160 hp eng. I find
it odd that that thier isnt more stc support for this change.
Thanks for the info I'll talk to my IA today
Ken

[51-pa22]

ok
with all of the "your mileage will vary" out of the way

1952-1953 PA-22 is TC-ed for an O-290-D2 yes?
and 1950-1951 for O-290-D...as a BTW

In 1954 Piper has O-320-A available in the PA-22 and not until 1957 the 0-320-B

Steve posted before I could.
but I do totally agree

I have checked locally as it CAN be done, however, GET ALL your ducks lined up first.

Remember, the FAA is here to help you:biggrin:

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[Steve Pierce]

Here are some more STCs for the O-320. You could also give the PMI some tummy comfort by showing them the Colt 160hp STC.

http://www.airweb.faa.gov/Regulatory_and_Guidance_Library/rgstc.nsf/0/C8CF2C678C9DE0E285256CC2000C5F92?OpenDocument&Highlight=sa4-815

http://www.airweb.faa.gov/Regulatory_and_Guidance_Library/rgstc.nsf/0/9E552787B1E638E4862570D1005DB0F8?OpenDocument&Highlight=sa481we

[51-pa22]

just got off phone with folk in Alaska
owner of "a bloody poser" ....ooops sorry about that :biggrin:
that was Curly comment....

Owner of SA1-275 for PA-22 issued 11-13-58 (http://www.crairmotive.com/forsale.htm#STC-Order)
Expecting him to chime in directly
He stated "refer to your Lycoming Type Certificate Data Sheet"

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