Propeller Falling Off Mid-Flight Issue

Hi, I’ve recently experienced a problem where the propellers on my drone keep coming off during flight, and I’m looking for some advice.

  1. During one of the flights, a propeller came off, causing the drone to crash.
  2. After that, I temporarily repaired the drone using tape and flew it a few more times without any issues. There was no problem at that time.
  3. I later replaced the frame and re-soldered the components, but that’s when the problems started.

Issues Encountered:

  1. Propeller came off during arming in position mode, even though the motor number and direction were alright.
  2. I tested the drone in Position mode with the propeller removed (to avoid any accidents), but the motors wouldn’t stop even after trying to disarm.
  3. After flying in Stabilized mode, when I landed and hit the kill switch, the propeller came off again and flew a considerable distance away.

I have the log files for both the 2nd and 3rd incidents.
Log file link: (attach log file link)

2nd issue https://logs.px4.io/plot_app?log=c61bb89d-52fe-42eb-a013-f3c2de0a45db
3rd issue https://logs.px4.io/plot_app?log=2a5b4781-215c-45f1-997c-66fc55799474

Question:

What could be causing this issue?

  • Could it be vibration?
  • Or is it due to motor wear and tear?

Any advice would be appreciated!