Monday, January 24, 2011

How to paint a Cessna 206...

...very carefully!  Painting the airplane is probably one of the most visual signs of progress when doing an airframe overhaul/rebuild project.  This past week, we were able to paint a good deal of parts for CMA, which was a big step forward.  I don't have any pictures of the pre-paint prep work, but that is actually the most important part of painting.  It's the time spent cleaning and prepping the parts that determine how the priming and painting is going to turn out.  The guys did a really nice job washing the parts and then etching and alodining them to get them ready to paint.  It's been proven over and over again that if you don't prep the metal or fiberglass well, the finished product will be very poor.  I think that the final result on this job was fairly good.  We used Dupont paint this time, and it was my first time shooting Imron in this quantity, so there was a little bit of a learning curve, but it all turned out pretty well.  Of course, there are the tell-tale signs of fatigue when you see the runs and the sags in a few places, and also some parts that were not so super glossy.  But hey, we all have areas to work on, and this is one that most guys don't have too much experience.  Some of the national guys were able to give painting a shot, and I think we'll all see good progress in the future as we hone our skills. 

 Here's our paint booth...we worked for a couple days cleaning it out and sealing all the cracks and holes.  It worked well, though.  Much of the smell/overspray was contained, which is great for all the office staff.
 First batch of parts, with primer already sprayed. 
 Here I am spraying white onto the tip tanks. 
 Here I am spraying white on an aileron with Marko and Adamson giving me good lighting. 
 Finished products...mostly flight controls on this batch of parts. 
 Finished tip tanks and wing strut fairings. 
 Pete (L), our new AIM Air short termer, Marko (C), and myself (R) discussing paint techniques.
 Pete and Marko getting the primer sprayed on our second batch of parts. 
 Lots of smaller pieces this time...often those small parts are harder to paint. 
 We also had the wings in the second batch, along with the doors, wing struts, etc. 
 Finished wing.  Notice the vortex generators on the leading edge, courtesy of Micro AeroDynamics.  The inboard three sets have just been painted red to show a warning in relation to the fuel cap.  Don't want the fueler to break them off...or more likely, to rip his trousers. :) 
Finished parts and pieces. 

Tuesday, January 18, 2011

You know you live in Africa when... (Part Three)

...when you find a critter like this one in the bathroom of your hangar.  One of the janitor guys found this guy and called the guard, who then called me to come and "see an animal that's in the bathroom."  I don't know about you, but when they don't tell you what it is...that's cause for concern.  On the way to the bathroom, I finally got him to tell me he thought it was a squirrel; but you know what...we don't really have squirrels here in Nairobi much.  Anyway, I got to the bathroom and peeped around there corner and there was this little guy huddled in the corner trying to hide.  For those of you unfamiliar with African animals...it is a hyrax.  There are tree hyrax and rock hyrax; this guy is a bathroom hyrax.  :)  Interesting trivia - they are the closest living relative to the elephant.  Huh. 


Thursday, January 13, 2011

Instrument panel for JPI EDM-930 in Cessna 206

Today, I've been working on the new instrument panel for 5Y-CMA's new JPI EDM-930.  To make room for the display screen, we have to remove part of the original subpanel.  Then, a new panel is fabricated that will be attached directly to the old subpanel.  It will get powder coated gray to match the rest of the instrument panels. 

  The before picture...
 Here's the beginning stages of the new panel, working on match-drilling and trimming to get the right fit. 
 I cut out the original subpanel... 
 ...which then looks like this. 
Here's the "final" panel.  I installed a few nutplates for the screws on the right and the bottom.  The countersunk screws on the left go through the RadioRax, as they were before.  Now to do some powder coating!

Wednesday, January 12, 2011

Installation of IO-550-N into 5Y-CMA, Cessna 206...

We have installed the new IO-550-N into CMA!  The installation went just fine, with only a couple small issues that were easily sorted out.  Now we're moving toward getting the rest of the engine/airframe connections sorted out, ie hoses, cables, etc. 

 Engine built up and ready to install. 
 Here I am moving the engine out to where the airframe was sitting...
 ...where apparently there was a meeting going on. 
 Getting it into place...who's legs are those?  Not mine...
 ...Caleb's.  Helping get the engine lined up. 
 Joseph on top helping push the engine down a little while I lined up the bolts.  It's a bit more difficult than the original mounts, as these have 6 bolts instead of only 4.  Still not too bad...
 James (L) and Joseph (R) getting things hooked up. 

It's fully attached...no more hoist!
Aaahhhh, success!  Joseph and myself, happy to have an engine installed. 

Tuesday, January 11, 2011

Movement...

This past week we moved CMA!  It went out to the front of the hangar for some cleaning before we installed the engine.  I thought I would catch it while the guys pulled it out there...







Friday, January 7, 2011

Engine Prep on 5Y-CMA

Coming into the new year, things are a bit slower here at the hangar in regards to "sceduled" fleet maintenance.  This leads to having time to work on projects...including the biggest project of them all, 5Y-CMA.  We're hoping to have a few weeks now where we can really get some good progress on the airplane.  What we're working for now is getting the fuselage and some other parts ready for painting, mainly the pieces that require both white and blue.  We're hoping to get enough progress that we will be able to do some painting very soon, perhaps next week.  For now, enjoy the pictures below of our progress so far this week. 
 Tavasi doing the cowling mod for the new engine. The oil filler door gets moved backwards and outboard just a bit to match the difference in the IO-550-N from the IO-520-F. 
 The old saying from carpentry most definitely applies in sheetmetal work; "Measure twice, cut once!"
 I really don't know where he got those safety glasses...I think they could stop a log from entering his eyes.
 Finishing it up by riveting a patch where the old door was located. 
 Who wouldn't be happy doing sheetmetal?! :)  I confess, it is one of my favorite things to do...maybe not everyone else's though.
 Here I am building up the baffles and other things on the engine before it goes onto the airframe. 
 What was I doing?  Changing a bracket around that came installed upside down.  Whoops. 
 Getting it all lined up with clecos to match drill some holes. 
 Ready to go...top view. 
...and bottom view.  Don't those exhaust from LEES look great!