Flyaway when put into land mode


Could somebody please offer me some assistance in diagnosing why I had a flyaway with my 250 quad yesterday. Everything seemed fine until i put it into land mode the quad then started to spin out of control and gain altitude. Luckily i switched back into stabilized and managed to bring it back down.

I have used land mode previously without a problem and cannot see anything glaring obvious in the logs but i am newbie so some help would be most appreciated.


Here is an Auto Analysis of your dataflash log:

Size (kb) 979.9775390625
No of lines 13799
Duration 6 days, 6:22:47
Vehicletype ArduCopter
Firmware Version V3.2.1
Firmware Hash 36b405fb
Hardware Type
Free Mem 0
Skipped Lines 0

Test: Autotune = UNKNOWN - No ATUN log data
Test: Balance/Twist = GOOD -
Test: Brownout = GOOD -
Test: Compass = GOOD - No MAG data, unable to test mag_field interference

Test: Dupe Log Data = GOOD -
Test: Empty = GOOD -
Test: Event/Failsafe = FAIL - ERRs found: FS_BATT GPS_GLITCH GPS
Test: GPS = FAIL - GPS glitch errors found (3)
Min satellites: 0, Max HDop: 3.09
Test: IMU Mismatch = NA -
Test: Parameters = GOOD -
Test: PM = GOOD -
Test: Pitch/Roll = FAIL - Pitch (55.14, line 12123) > maximum lean angle (45.00)
Test: Thrust = GOOD -
Test: VCC = GOOD -

Looks like you had GPS/BATT issues



Thanks for taking a look, so would GPS errors cause land mode problems? I have the battery fail safe turned off so I thought that should not have been an issue.

Can anyone else answer this? Would land mode be affected by GPS and if not then what caused the flyaway?

I have had other flights where there were GPS errors and its landed correctly.