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NTSB Report
November 13, 2020 · General Atomics MQ-9 B · CBP233
Sierra Vista, AZ
Overview
Report Status
Probable Cause
Event Type
Accident
Date
November 13, 2020
Location
Sierra Vista, AZ
Aircraft
General Atomics MQ-9 B (2012)
Tail Number
CBP233
Operator
Customs and Border Patrol
Injuries
None
Aircraft Damage
Destroyed
NTSB Number
WPR21LA054
The Operations Supervisor reported that the instructional flight with an unmanned aerial vehicle (UAV) was programmed for a single takeoff and traffic pattern to a full-stop landing. During the pre-landing checks, the pilot under instruction selected the incorrect landing profile, which did not account for the current runway displaced threshold because of runway construction. Shortly before touchdown, the pilot initiated a go-around but the landing gear impacted a runway trench, and subsequently the UAV impacted the ground. A post-crash fire ensued and the UAV was destroyed. The supervisor added that neither the instructor pilot nor the pilot receiving instruction spotted the incorrect selection during the pre-landing checks.
NTSB Probable Cause
The pilot’s incorrect automated landing profile selection, which resulted in an impact with a runway trench. Contributing to the accident was the pilot receiving instruction's and instructor's failure to spot the incorrect landing profile selection during prelanding checks.
Full Narrative
The Operations Supervisor reported that the instructional flight with an unmanned aerial vehicle (UAV) was programmed for a single takeoff and traffic pattern to a full-stop landing. During the pre-landing checks, the pilot under instruction selected the incorrect landing profile, which did not account for the current runway displaced threshold because of runway construction. Shortly before touchdown, the pilot initiated a go-around but the landing gear impacted a runway trench, and subsequently the UAV impacted the ground. A post-crash fire ensued and the UAV was destroyed. The supervisor added that neither the instructor pilot nor the pilot receiving instruction spotted the incorrect selection during the pre-landing checks.
Flight
Event TypeAccident
Event Time12:26 MST
Nearest AirportSierra Vista Municipal Airport (0nm E)
Runway26
Runway Length9501 ft
Runway Width150 ft
Flight Plan FiledNone
Aircraft FireGrd
Aircraft ExplosionNo
Aircraft
AircraftGeneral Atomics MQ-9 B
Tail NumberCBP233
Aircraft CategoryAir
DamageDestroyed
OperatorCustoms and Border Patrol
Engines1
Seats0
People & Injuries
Fatal0
Serious0
Minor0
Uninjured0
Total0
Crew 1Age 34 · Second Class · None
Crew 2Age 57 · Second Class · None
Conditions
ConditionsVMC
LightDaylight
Wind310° @ 7 kt
Visibility10 sm
CeilingOvercast 2200 ft
Temperature / Dew Point66 F / 34 F
Altimeter30.14 inHg
Observation Time11:58
Weather SourceWFAC