I had an unfortunate incident this afternoon which has cost me all my copter electrics including my Panasonic HDC TM700 camera. I had been through four battery packs without incident when suddenly my 2.9.1b quad started loosing altitude, ending up in the harbour fully submerged. The entire flight (or so I thought!) was in STABILIZE mode. Suddenly the quad stopped responding to my commands and started loosing altitude. I was not especially high in the first place and did not have enough wits about me to attempt to change mode. The quad simply descended into the sea some 50m away from me... I have telemetry via my 9x/Frsky and had no warning signs. Voltage, RSSI, GPS were all just fine. I have a failsafe set on the throttle that should engage RTL but have never used or configured LAND mode. After retrieving the rig and drying out the APM I downloaded the log only to find the LAND mode had been engaged!
From the log starting at line 8659:
ERR, FS, 3
I do not have LAND configured as any of the modes available via Ch5 switching. Is there anyone who can shed some light on why this may have happened? What is EV 15 & 30? What is ERR, FS 3? If I am going to rebuild then I would really like to avoid this in the future...