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  #31  
Old 06-04-03, 07:16 PM
rick bell rick bell is offline
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Join Date: May 2002
Location: 15 mi south san felipe, mx
Posts: 263
inspected mine and the push tubes showed signs of scraping on the inspection plate screw (only on the outter end) cables were ok. there is additional clearance on the inner push tube end and with shorter screws it has over an inch of clearance; however the otter push tube end there is very little clearance. the inner inspection cover on mine has the top center and top right screw holes adandones and small strips of alum. are riveterd in place to clamp on both sides were the tinnerman fitting were, so no rubbing is possible. however the otter cover does not and uses all screws. if you swap cover and use the inner on the otter you will have clearance (also swap the unused tinnerman clips on the otter area and place them in the abandon holes on the inner area. also make sure the screw are short enough to give clearance but ennough to hold. also i spray ac150 corrosion all over the interior every year so all cables and pulleys are always lubericated (two benefits in one application)
thank you for the pictures submitted it made it very easy to locate the areas, great job!!!!!!!!!!
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  #32  
Old 06-28-05, 08:54 PM
Kim Geyer Kim Geyer is offline
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Join Date: May 2002
Location: Bahama, NC
Posts: 148
Flap Cables

I've been changing cables on our 337's and thought ya'll would be interested in the results.
One with 3200 hrs 4 of the 6 were frayed -@ 6 to 8 strands
One with 2000 hrs 3 of the 6
One with 3000 hrs 1 of the 6
Kim
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  #33  
Old 07-02-07, 01:29 PM
Paul462 Paul462 is offline
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Join Date: May 2003
Location: Florida
Posts: 137
Question

So what do you think, guys? If one were going to pre-emptively replace the flap cables, would one only replace the 2 inboard cables (which run from the motor to the inboard belcranks), or all six?

Paul
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Paul
T337C
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  #34  
Old 07-03-07, 10:17 PM
Kim Geyer Kim Geyer is offline
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Join Date: May 2002
Location: Bahama, NC
Posts: 148
From the condition of the cables I've removed from our planes, I would change them all at @ 3000 hrs. You have to take them out to inspect them. When removing the cables I found it much easer to remove the pullies and leaving the cotter pins that keep the cable on the pully in place.
Hope this helps
Kim
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  #35  
Old 07-04-07, 03:33 AM
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Skymaster337B Skymaster337B is offline
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Join Date: Jun 2004
Location: New Mexico
Posts: 447
Perhaps the cable strands are breaking because of the extra drag caused by the push rods rubbing on the inspection panel screws? Or, is there any extra stress on the cables for lowering the flaps at 140mph vs 100mph?

Personally, I think it is good to visually inspect. But wear items like this should be time/cycle limited. Aviation is only 100 years old. This is the first time in its history that 40-50 year old metal airplanes are flying with no manditory parts replacement times -- i.e., no contiued airworthiness instructions as newer airplanes have. I don't think Mr. Cessna ever envisioned that his airplanes would fly for 30, 40, 50, 60 + years, but they are. I asked Cessna, thru an email, what was the designed service hours/life of a 172; they never answered back. My guess is because they never considered it during its design.

This forum, and others like it, is a God's send. We are our own tech support, and are sitting at an historic aviation crossroad. That crossroad is: "How long can you fly an airplane before it just falls out of the sky?"
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