New Aircraft Owner Bad Assumptions - #pilot #debrief

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Join me in this video where I discovered some poor assumptions I have made as a new aircraft owner. I purchased a Cessna 150 without having previous experience in a Cessna 150, so I did not have a great baseline of comparison to know if the plane was experiencing an issue or if it was the normal behavior of a Cessna 150.

We are going to examine the symptoms of a recently discovered engine issue, why I brushed them off and how even performing some anecdotal research reinforced my assumptions with confirmation bias.

#cessna #cessna150 #generalaviation #pilotdebrief #pilot #debrief #aviation #aviationsafety #flighttraining #aircraft #mechanic #magneto #engine #flight #confirmationbias #bias

KazFlight

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As AMT student I say you have saved me from getting trapped in my own thinking...very grateful to you fly safe....

freechild

I own a C150L. I had RPM drop issues on the first flight of the day. Once I had the STC belly sump installed, RPM drop issues went away. The lowest point in the fuel system is the belly drain; not the gascolator. So get the belly sump and use it. When the mechanic installed it, several grams of sand fell out. Never had an RPM drop since.

Also, the best way to start a 150:

1. Do not prime unless it’s cold.
2. Full rich on mixture.
3. 3 pumps of throttle.
4. Pull mixture to full lean.
5. 1/2” throttle.
6. Crank starter and gradually push mixture as engine catches.
7. Always taxi leaned.

For hot start, eliminate step 3.

AvgDude

I recently completed an annual on my Mooney. I went up for 3.5 hrs and all seemed OK. My next flight 2 days after as I taxied out to the run up area and did my run up, I noticed the huge drop tobthe point that the engine wad quitting. The shop was right behind me so my mechanic came out. We did what we could and the problem continued. Mag had to be sent out. $1700 for overhaul or $1500 for one they have already. My mechanic preferred the mag to be overhauled. It works now.

jeromes

I have owned a C150M with an O200 Continental for 15 years.

====> The key to quick starting is proper priming.

I prime a cold engine one full stroke of the primer plunger, and half a stroke when engine is warm. I rarely see more than 2 or 3 blades go by before it starts. If it cranks for 5 seconds without starting then something is wrong. Oh, I never pump the throttle before starting.

ZagiBob

At least you are now admitting your mistakes and got the problem sorted out. Guessing problems is what we're used to doing with cars. But flying of course means if performance is in question, see your AME. Great video, thanks. 🙂

mikeanderton

I'm a low time student pilot who just purchased a Beechcraft B19 Sport. I thought I was being overly cautious, learning every single component and making sure everything is inline with the POH and other owner experiences. This video is additional confirmation that I'm doing the right thing... Thank you!

JabariHunt

Great post and analysis - glad you got it sorted out. One more takeaway that I think is worthy of including. It is important, especially as a new owner, to carefully assess the aircraft's actual performance against the POH. Rate-of-climb, takeoff/landing distances, cruise TAS, fuel flow, etc. When an aircraft is underperforming, that should be a red flag and warrant further investigation. Fly safe!

theflightpractitioner

2000 hours in a 150. When you shut down From a 1000 RPM setting slowly turn the mixture to ICO and see if the RPM rises or stays the same. When you start up your on the idle mixture. No rise your to lean at start up. Lean on the ground you want hurt it. Saves fouled plugs. Check your oil dip stick the little prongs that lock it in plane can crack and the dip stick pops out when you least expect it. The carb heat lever on the carb box under the cowling are prone to break off. My. carb heat was sticking and causing reduced RPM make sure you have the belly drain if not you are asking for future engine trouble. Most mechanics say to run TSP the only approved fuel additive for fuel to help with the lead buys it’s expensive. Also brief yourself on stuck valves and how to know and handle that situation. Add an oil filter if you don’t have one. You can change your oil and filter every 50 hours. Make sure you start sending your oil samples to Blackstone and cut your oil filter open. You will have and idea about the engines condition. Lock Haven airports in PA can rebuild the instruments. Don’t forget Camguard or Av Blend at each oil Change.

flyfun

Rule of thumb is before 500 hours on the mags. It's great to have redundant mags. However, if one mags starts misfiring you could have the engine quit even if the other mag is fine. Not something to play with. Glad you got them overhauled.

I had kind of the same thing when I bought my first Mooney. I had a pre-buy and they said everything was great. However, when you practiced stalls it would break real hard to the left. I just thought that was normal for Mooney's. But when I took it to a Mooney specialist they found that the rudder had a "S" shape to it. I had it reskinned and no more problem! Sometimes we don't know what we don't know.

libertine

My 150 is hard to start. I decided to order the electoair electronic ignition. Hopefully it will help. This is my second 150. The first one had an old worn out prop which made it slow. On my current one I got flap gap seals which actually increased speed and climb performance.

markleitch

I learned to fly in 150s 10 years ago, fun little planes except for the fact they're underpowered and glacially slow. I still like to rent one every once in a while if I'm hopping around the neighborhood so to speak, not great for long distance cruising though. In any case, it's a solid first plane to own if you ask me. Cheap to run, easy to fly, not fast enough to get away from you :D And some good info in the video, keep it up!

thierryvt

I think of the Cessna 150 as a nice flying honest airplane. I finished my PPL on a 1968 Cessna 150 but had flown a few mid '70's 150's. I actually liked flying it more than the 172 which feels more stable. As a child I was often around my Dad's Cessna 180's and Helio Courier so I it seemed to me the nose wheel should be on the tail, that said ground handling is as easy as it gets. I do recall the poor climb of the 150 especially with two onboard but if you are not in the mountains it is ok. When I was a child I recall my Dad saying " if you want to stay alive in aviation avoid underpowered airplanes". As with any airplane don't ask for more than it can give. Enjoy the freedom of flying Kaz and thanks for sharing!

dwaynemcallister

On my C90 antique Commonwealth, with high density altitude (over 5000), I get a better climb rate with some leaning of mixture. During runup adjust mixture to best rpm. Full mixture might see 150 fpm climb, leaning can add 300 fpm to climb rate.

Rvictorbravo