The other day I was over at Don Nieser's hanger (one of them) and recieved some information from him that I would like to pass on to you.
First: Broken Flap Cable
I will attach a picture I took of the cable and bell crank on my aircraft (337B). It is the inboard bell crank just outside the boom. Using a mirror and light I feel you can inspect the cable very well.
Second: Long Inspection Plate Screws
Don also showed me a possiable trouble area with long screws in the inspection plate for the push-pull flap rod. When you inspect it the flaps are extened and the rod is a long way away from the screws, but when the flaps are up the rod comes very close to the screws. I believe a 3/8" blunt end screw will be long enough to hold the plate. I will attach pictures taken of my airplane (I had the problem).
N358 1967 337B Normally Aspirated,
KX155, Mod "C", Cessna Auto Pilot 400, 4 Seats, 3400 TT on Airframe