Originally Posted by
Cactus Jack
Judging by the photos that I have seen, cracks might well be visible to both the Engineer on a pre-flight or turn around, as well as the Pilot on his walk around.
Have you seen Boeing's Recommended Inspection Procedure? Without a boroscope the likelihood of even seeing the base of the frame fittings and failsafe straps would be zero. Even with the aid of a boroscope with a 1.5m extension you've still got to thread it past a wiring bundle on the RHS and behind a hydraulic fitting on the LHS.