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NTSB Report
June 1, 2020 · Air Tractor AT802 Fireboss · N779DA
Unalakleet, AK
Overview
Report Status
Probable Cause
Event Type
Accident
Date
June 1, 2020
Injury Outcomes
No injuries (1 uninjured)
Location
Unalakleet, AK
Aircraft
Air Tractor AT802 Fireboss (2018)
Tail Number
N779DA
Operator
Aero Spray
Injuries
None
Aircraft Damage
Substantial
NTSB Number
ANC20CA052
The pilot of the amphibious scooper air tanker airplane, reported that while preforming aerial firefighting operations, he heard ground firefighters express concern over the radio about their equipment "being too close to the fire line." In response, the pilot landed at a small lake to fill the airplane's water hopper tank with water to drop on the fire. During the departure from the lake, the airplane’s left float struck a "small hill" that was about 20 ft above ground level. The pilot proceeded to fly the airplane to a nearby airport and made an uneventful landing. A postaccident examination of the airplane revealed substantial damage to the fuselage. The pilot reported that there were no preaccident mechanical failures or malfunctions with the airplane that would have precluded normal operation.
NTSB Probable Cause
The pilot's failure to maintain terrain clearance during the departure, which resulted in a collision with terrain..
Full Narrative
The pilot of the amphibious scooper air tanker airplane, reported that while preforming aerial firefighting operations, he heard ground firefighters express concern over the radio about their equipment "being too close to the fire line." In response, the pilot landed at a small lake to fill the airplane's water hopper tank with water to drop on the fire. During the departure from the lake, the airplane’s left float struck a "small hill" that was about 20 ft above ground level. The pilot proceeded to fly the airplane to a nearby airport and made an uneventful landing. A postaccident examination of the airplane revealed substantial damage to the fuselage. The pilot reported that there were no preaccident mechanical failures or malfunctions with the airplane that would have precluded normal operation.
Flight
Event TypeAccident
Event Time16:17 AKDT
Nearest Airport0nm
Flight Plan FiledNone
Flight Plan ActivatedNo
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftAir Tractor AT802 Fireboss
Tail NumberN779DA
Aircraft CategoryAir
DamageSubstantial
OperatorAero Spray
Operating RulePart 91
Engines1
Engine TypeTurboprop
Engine DetailsPratt & Whitney · PT6A-67F · Turboprop · 1600
Seats1
People & Injuries
Injury SummaryNo injuries (1 uninjured)
Fatal0
Serious0
Minor0
Uninjured1
Total1
Crew 1Age 50 · Second Class · None
Conditions
ConditionsVMC
LightDaylight
Wind90° @ 15 kt, gusting 22 kt
Visibility10 sm
CeilingNone
Temperature / Dew Point0 C / 0 C
Altimeter29.45 inHg
Observation Time23:56
Weather SourceWFAC