Can you guess what caused this accident?

Left main gear collapse. Landing looked soft, so probably hydraulic leak or the gear didn't fully lock.

This is what they found on this accident.

The NTSB would say "The Pilot's failure to maintain control immediately following the left main gear's failure to maintain extension and control."

Failure of the left landing gear to lock would be my guess.

They forgot to land on water.

No crosswind, smoke from hull scraping pavement had very little movement post “ground loop”. Left landing gear failed to lock and was not indicated on instrument panel or was not noticed or ignored. Left landing gear collapsed once weight was applied.

Landing gear fail ( left Well retracted)

One should not raise the landing gears after landing.

I think those are allergic to land.

Might have something to do with this flap position.

Damn...those are rare. Looks like landing gear on one side wasn't locked in. I do hope that bird can fly again.

stayed in ground effect after the flair for too long, landing long, and applying hard braking force collapsing a hundred year old landing gear. imo. now i read the comments...

No water. I used to watch these planes take off and land in the water at Norfolk Naval Base.

Looked to me like the port main gear retracted.

Looks like failed hydraulics to me as well. I’m no aircraft mechanic so forgive the novice question…Does the PBY Catalina not have a backup, manual gear lock-out like other WW2 aircraft? Was that feature exclusive to the Memphis Belle?

Looks like the port side landing gear failed.

My best guess is the left main landing gear failed (Colapsed)!🛩🤠

That's a beautiful Catalina; I hope the damage to the port wing isn't going to cause it to be written off.

Oleo strut failure on the port side maybe

Gear collapse. The Catalina has a very specific gear type that retracts into the side of the fuselage.

That was sad to watch. Should be repairable.

1st guess: left main gear collapse 2nd guess--don't guess look for a report: Collapse of the left main landing gear due to the fatigue fracture of the lower landing gear actuator bolt during a post-maintenance (on hydrolytic system) test flight

Raised the gear instead of the flaps.

Left main gear lock failure?

Partial undercarriage collapse?

failure of the left landing gear --- wasn't locked or it suffered a structural breakdown

Collapsed left side landing gear.

LH main leg collapsed on landing.

It looks like the main left landing gear didn’t fully deploy. This became apparent when the main wheels touched the runway, as the left wheel bent inward, which indicates a mechanical failure in the hydraulic system of the landing gear.

Didn't look like crosswind, based on the approach. A blown tire, maybe?

What a bummer. Bro made such a smooth landing.

I’m guessing the 24 YO airframes mech on his second wife with financial problems last worked on the gear.

Darn a PBY

They though they saw an enemy submarine and had to stop it at all cost.

Gear was not locked in position?