Airplane Owner Maintenance

A Maintenance Oriented Podcast For Airplane Owners, Pilots, and Mechanics

Tag: chargingsystem

216 – WHY is the alternator not working?!

March 3, 2023 /

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Here’s the short answer: Worn and contaminated brushes inside the alternator. Check it out:

My theory is that the excessive amount of carbon dust from brush wear was causing a short circuit situation between the brushes, and not allowing the field circuit in the alternator rotor to be properly energized for normal operation.

Here’s a comparison of the old and new brushes:

This story comes from a recent situation on the right engine of this Aerostar aircraft:

Since the alternator has externally removable brushes, it turned out to be a minimally invasive surgery to fix the problem. I cleaned the brush holder and also the slip rings inside the alternator, and after installing new brushes and reassembling everything, the alternator performed flawlessly.

Listen to the audio to hear the full story.

This episode also covers some of the email responses I received last week from some listeners, and here’s one of the highlights:

Glen sent me a photo of he and his dad in front of his Piper Cherokee… I love to see different generations enjoying aviation adventures together!

One more fun fact: Glen’s mom took her private pilot check ride years ago with Glen in the back seat of their Cessna 175 when he was 3 weeks old! What a great story!

Thanks Glen, for sharing some of your story with us!

This episode also covers a recent trip to Charlotte in another Aerostar, and the interesting routing we got from ATC on the way there… definitely some great IFR and ATC lessons to observe and learn from this one!

The Charlotte trip also sparked some conversation about twin engine charging systems, and paralleling issues that can happen… this situation is still in process, and I’ll try to give an update sometime in the future.

Finally, I had the privilege of joining Carl Valeri, Tom Frick, and Bill English on episode 301 “What is Your Most Challenging Approach” of the Stuck Mic AvCast. It was great fun talking about challenging approaches, both instrument and visual approaches.

Here’s a link where you can listen:

SMAC301 What Is Your Most Challenging Approach?

I also highly encourage you to check out Carl Valeri’s Aviation Careers Podcast:

http://www.aviationcareerspodcast.com/

You can also find the Aviation Careers Podcast on YouTube.

https://www.youtube.com/@AviationCareersPodcast

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139 – My Alternator Came Apart… Should I Also Replace the Voltage Regulator?

April 4, 2020 / / 0 Comments

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NOTICE: UNTIL THE END OF MAY 2020, USE CODE “CANARD” FOR A 20% DISCOUNT ON MY VIDEO COURSE “SAFETY WIRE LIKE A PRO!” (Listen to the podcast to hear the story behind the word “canard” and why I chose that for the code.)

Click the following link to learn about the course:

https://airplane-owner-maintenance.teachable.com/p/safetywiring

I received an email recently asking a question about an alternator that came apart due to a failed bearing… listen to today’s podcast episode for some thoughts on that.

Also, many older airplanes don’t have a digital voltage indicator on the instrument panel, so here’s a fantastic solution for plugging in to the cigarette lighter: (and the great thing is, it’s under $20!)

https://www.sportys.com/pilotshop/flight-gear-dual-usb-charger.html

Here are some other items of interest from this past week: (All of these situations are described in today’s episode.)

STRANGE VACUUM GAUGE INDICATIONS IN A MOONEY – CHECK OUT THE DETERIORATED HOSE THAT MAY HAVE BEEN CAUSING THIS:

EXHAUST SYSTEM PRESSURE TESTING ON AN AEROSTAR:

A SLICK MAGNETO THAT MADE IT TO ABOUT 1700 HOURS! (This one has gone to Kevin Herrington at Aircraft Ignition Services, LLC for repair.)

A LOOSE BOLT IN A TURBOCHARGER SUPPORT BRACE: (NOTICE THE RUSTY COLOR IN THE SEAM, WHICH INDICATES CHAFING. ALSO NOTICE THE WEAR MARK UNDER THE WASHER.)

For more information about noticing colors on an engine, check out podcast episode 036 – Tell-Tale Colors in an airplane’s engine compartment.

A FUEL QUANTITY COMPUTER IN AN AEROSTAR:

(We sent this component to Tech-Aire in Wichita, KS because the right fuel gauge was not indicating properly, and “Bill” advised the problem is usually in this box… so I’m hopeful this will fix it.)

PLEASE SEND ME A VOICE MESSAGE OR AN EMAIL:

Which one of these video training courses would you be most eager to learn from:

  1. Servicing landing gear shock struts.
  2. Basic electrical system operation and troubleshooting.
  3. Exhaust valve borescoping and interpretation.
  4. Another idea you have! (Let me know.)

I’d love to hear your thoughts, so click that tab over on the right side of the page and record a voice message, or, send me an email: dean@airplaneownermaintenance.com

Don’t forget, you can get my safety wiring video tutorial course for 20% off through the end of May 2020… click this link for more info:

https://airplane-owner-maintenance.teachable.com/p/safetywiring

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