Piper PA-30 Twin Comanche

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ENGINES

 

Two Lycoming IO-320-B1A Engines
Professionally Overhaul By Teledyne Mattituck

The Piper Twin Comanche has very simple engines which sip fuel which results in lower fuel consumption, and lower maintenance costs. It results in very economical operation compared to any other twin engine airplane available including other twin engine aircraft from Piper such as the Seminole and Seneca. Economical however does not mean slow as the PA-30 easily does 160kts, burning 7.5gph per side.

TURBOCHARGERS OR NOT?

Prior to purchasing this plane I made the decision not to go with a turbo model. My reasons for doing so were that I had no plans on doing very high altitude flying, I didn't need the extra cost from the additional ADs and maintenance items that come with having turbochargers, and the engines' "time before overhaul" (TBO) is reduced from 2000 hours to 1800 hours. Another reason I avoided PA-30T's is because there is really no way to know whether the engines have been "over-boosted" by someone forgetting to close to turbos during descent. This can shorten the life of the engines significantly. In the end, the significantly higher operating costs led to my decision to not buy a turbocharged Twin Comanche.

TELEDYNE MATTITUCK OVERHAULS

One of the most reputable engine overhaulers in the world is Teledyne Mattituck. All overhauls are not identical and if you take an A&P/IA with you to inspect PA-30's like I did, you'll see how different overhauls can be. Mattituck was described as having, "earned it almost fanatic loyalty and return business" in an article by Aviation Consumer magazine on engine overhauls. That should sum it up.

Another thing that should be noted is that just because an engine is low time, or zero time, it doesn't mean that it is worth anything. During my inspections of PA-30s, I regularly found engines with zero time, or very little time, that had almost never been flown since overhaul. Even now I find planes listed along side mine that have very low time engines, but the unfortunate part is that many have not been flown in a very long time, and so the overhaul is basically useless. The engine has probably not been properly broken in, and will lead to a serious catastrophe down the line. Airplanes (and engines) like to flown, and those that aren't, go bad. Engines that aren't flown regularly will not make it to TBO according to many A&Ps I've spoken to.

COMPRESSIONS AT LAST ANNUAL (JUNE 2006)

RIGHT ENGINE: 1. 78/80 2. 78/80 3. 75/80 4. 78/80
LEFT ENGINE: 1. 78/80 2. 78/80 3. 78/80 4. 75/80

 

Disclaimer: All the information above including hours are approximate at the time this web site was published. All the information provided on this site is accurate to the best of my knowledge.
It is the responsibility of prospective buyers to verify information presented on this site prior to purchase. Not responsible for typographical errors.
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