---------------------------------------------------------- Commander-List Digest Archive --- Total Messages Posted Wed 02/12/03: 7 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 02:30 PM - GSO-480 TBO (Todd Hindmarsh) 2. 02:33 PM - AvBlend FYI (Todd Hindmarsh) 3. 02:58 PM - Re: GSO-480 TBO (Chris Schuermann) 4. 03:07 PM - Re: GSO-480 TBO (MOEMILLS@aol.com) 5. 03:21 PM - Re: GSO-480 TBO (Tylor Hall) 6. 03:41 PM - Re: GSO-480 TBO (CloudCraft@aol.com) 7. 10:46 PM - Re: AvBlend FYI (CloudCraft@aol.com) ________________________________ Message 1 _____________________________________ Time: 02:30:33 PM PST US From: "Todd Hindmarsh" Subject: Commander-List: GSO-480 TBO --> Commander-List message posted by: "Todd Hindmarsh" TBO chat again. What actually determines when you have to overhaul these engines? Is based on the results of the annual inspection? Compression? Oil analysis? JB flew that 560F with nearly 1700/1900 and said it was still running strong. Can we go 2000 if we take good care of the engines? Thanks, Todd ________________________________ Message 2 _____________________________________ Time: 02:33:02 PM PST US From: "Todd Hindmarsh" Subject: Commander-List: AvBlend FYI --> Commander-List message posted by: "Todd Hindmarsh" I just ordered some AvBlend for the oil change next week and came to find out that it's made by the ZMax company. I know that stuff works well in automobiles so I'm feeling optimistic about its performance in the GSO-480's. The other nice thing - this stuff costs the same as the automotive stuff. ________________________________ Message 3 _____________________________________ Time: 02:58:24 PM PST US From: Chris Schuermann Subject: Re: Commander-List: GSO-480 TBO --> Commander-List message posted by: Chris Schuermann Todd Hindmarsh wrote: > What actually determines when you have to overhaul these > engines? Is based on the results of the annual inspection? Compression? Oil > analysis? In a nutshell, yes. For part91 use, most components are operated "on condition". This means that as long as an A&P/IA will sign the engines off as "airworthy" that you can continue running them. Especially on the smaller, low power engines, you can get well past TBO assuming that you started the run with a high-quality engine. One thing to note, however, is that the likelyhood of an expensive overhaul begins to go up as you run well past TBO. Basicly, if you wait until something really breaks, it's gonna be more expensive to fix. (ie: when a bearing finally fails, it could trash a VERY expensive crank or cam which otherwise would have just been inspected and returned to service). If you're running a commercial op, TBO's are mandatory. There may also be a number of other "life limited" items for part 135 which can be ignored for us GA types. Not a thing wrong with running an engine past TBO, but I'd suggest looking at things with more detail as the hours tick by. Might begin doing those oil analysis every oil change, doing a more carefull look at exhaust systems during pre-flight (look for flange blow by), and general engine condition. happy flying chris ________________________________ Message 4 _____________________________________ Time: 03:07:55 PM PST US From: MOEMILLS@aol.com Subject: Re: Commander-List: GSO-480 TBO --> Commander-List message posted by: MOEMILLS@aol.com Todd: If you fly as a private pilot (not for hire or profit) you do not have to overhaul the engines, by law, just because they have reached TBO. Some Lycoming 032E2D engines run well past 3,000 hours with a 2,000 TBO. Your AP mechanic or IA is usually the one who gives the thumbs up or thumbs down at annual inspection time. His decision will most likely me made on a compression test, and oil pressure. Please note that some of us have an insurance requirement that the engines must be overhauled at TBO. We just pulled the engines in my 680F(p) which have IGSO540-B1A engines. These engines have the shortest TBO of all the engines at only 1,100 hrs. They were within 20 hours of TBO, with a top overhaul at about 600 hrs. This is pretty good, considering that the major overhaul was in 1981, and the plane set idle a lot before I purchased it. Several of the cylinders had been replaced, one at a time in the last three years. Moe Mills N680RR ________________________________ Message 5 _____________________________________ Time: 03:21:19 PM PST US From: "Tylor Hall" Subject: RE: Commander-List: GSO-480 TBO --> Commander-List message posted by: "Tylor Hall" Moe, Another component of TBO is years. If you are flying for hire, Part 135, you must overhaul the engines at 12 years regardless of time on the engines. It is a which ever comes first. Regards, Tylor Hall Wind Dancer Aviation Services, Inc. 2V1, Pagosa Springs, CO 970-731-2127 This is pretty good, considering that the major overhaul was in 1981, and the plane set idle a lot before I purchased it. Several of the cylinders had been replaced, one at a time in the last three years. Moe Mills N680RR ________________________________ Message 6 _____________________________________ Time: 03:41:18 PM PST US From: CloudCraft@aol.com Subject: Re: Commander-List: GSO-480 TBO --> Commander-List message posted by: CloudCraft@aol.com In a message dated 02/12/03 15:21:40 Pacific Standard Time, winddancer@centurytel.net writes: > If you are flying for hire, Part 135, > you must overhaul the engines at 12 years regardless of time on the > engines. > It is a which ever comes first. > I operated Part 135 since 1995, but back then, that particular requirement was because Lycoming has a mandatory service bulletin saying o/h at 12 years if the TBO is not up yet. Air Carriers must comply with ALL mandatory SBs. Not sure if Continental has the same requirement, but I'd be shocked if they didn't. Wing Commander Gordon ________________________________ Message 7 _____________________________________ Time: 10:46:09 PM PST US From: CloudCraft@aol.com Subject: Re: Commander-List: AvBlend FYI --> Commander-List message posted by: CloudCraft@aol.com In a message dated 02/12/03 15:49:03 Pacific Standard Time, todd@inpnet.org writes: > The other nice thing - this stuff costs the same as the automotive stuff. > If Dennis Polito is lurking, he may surface and tell you about meeting the AvABlend guys at Oshkosh one year. If I remember the story correctly, they copped to the fact that it was the automotive stuff but because it went into airplanes, well, you know ... Wing Commander Gordon