[STEVE]

STEVE on April 20, 2018 at 10:00 am #18632

Hi, The Type Certificate Data Sheet says the A4A is similar to the A3A except it has a stiffer crankshaft. Based on my brief research, it doesn’t appear as thought either of these engines have provisions for installation of a constant speed prop. However, this research is preliminary; I suggest you continue to research this.
The A3A is an approved engine for installation on the Cherokee 180. Just to make sure I/we are on the same page. This engine is approved on PA 28 serial numbers: r S/N 28-03; 28-671 through 28-5859; and 28-7105001 through 28-7205318.
If the airplane you’re looking at has a serial number in this range: for S/N 28- E13, and 28-7305001 through 28-7505260; the only engine approved in the Type Certificate Data sheet is the A4A or A4M.
If you’re looking at an Archer II, serial numbers: for S/N 28-7690001 through 28-8690056; 28-8690061; 28-8690062; and 2890001 through 2890205, the only engine listed in the TCDS is the A4M or A4A with a specific carburetor.
If you need more help, or want additional information, please post.
Happy Flying,
Steve

[Steve Boyer]

Steve Boyer on April 19, 2018 at 8:20 pm #18631

I have a O-360-A3A engine with only 600 TT on it and I am looking for a Cherokee 180 airframe to put it in. I am partial to the D model but it came with the A4A which is exactly the same engine without the hollow crank. After installation I would like to pursue mounting a constant speed prop on it. First up though is whether the A3A is legal to mount on the D. I would head back to the C if it is not allowed..

Thanks,
Steve