Probable cause
The incorrect altitude indication by test software during landing.
NTSB analysis
The operator of the unmanned aircraft system (UAS) reported that, during a test flight with a new software upgrade, the UAS completed the delivery mission and was transitioning to land, when all six motors suddenly stopped. The UAS fell to the ground and impacted the asphalt taxiway, resulting in substantial damage to the fuselage.
Examination of the UAS by the operator revealed that the newly installed software caused an incorrect altitude reading in the UAS during landing, causing the motors to shut down.
The operator reported that there were no preaccident mechanical failures or malfunctions with the UAS that would have precluded normal operation.
Text from the NTSB. Open the NTSB docket for WPR25LA064 for the full record.
Event
- Date
- Dec 16, 2024
- Type
- Accident
- Place
- Pendleton, Oregon
- Nearest airport
- Eastern Oregon Rgnl At Pendlet (PDT)
- Highest injury
- None
- Weather
- Visual (VMC)
- Light
- Day
Amazon.Com Services Llc MK30
- N-number
- N223PA
- Category
- Helicopter
- Year built
- 2024
- Damage
- Substantial
- Operating rule
- Part 91 (general aviation)
- Purpose of flight
- Flight test
From the NTSB aviation accident database: N-registered aircraft, events since 2008, data through Oct 28, 2026. The file is published monthly, so the latest weeks are incomplete and recent records can change. The official source is the NTSB aviation investigation search. CheckAero is independent and not affiliated with the NTSB.