Found a hidden crack on a 737 flap track during a routine check

I was doing a standard B-check on a 737-800 last Tuesday and spotted a hairline crack on the inboard flap track. Turns out it was from a manufacturing defect back in 2019 according to the logbooks. Has anyone else caught stuff like that on older airframes?

2 comments

2 Comments

brian_coleman1d ago

Did your inspection find any other corrosion nearby, or was it just the one crack? I had a buddy find a similar hairline on a DC-9 flap carriage a few years ago, and it turned out to be a stress point from an old repair that wasn't filed right. He said the paperwork was a mess to sort out, but catching it early saved a lot of grief.

grace_perry441d ago

Actually that crack was solo, no corrosion nearby, just a single stress fracture from a bad rivet repair.