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NTSB Report
September 2, 1992 · Cessna 170B · N1737D
Ninilchik, AK
Overview
Report Status
Probable Cause
Event Type
Accident
Date
September 2, 1992
Injury Outcomes
2 injuries (2 serious injuries)
Location
Ninilchik, AK
Aircraft
Cessna 170B
Tail Number
N1737D
Operator
Shawn E Imboden
Injuries
Serious
Aircraft Damage
Destroyed
NTSB Number
ANC92LA153
THE STUDENT PILOT MADE A LOW LEVEL PASS TO DROP NEWSPAPERS TO A HUNTING CAMP. WITNESSES SAW A LEFT BANKING TURN AFTER THE PASS AND HEARD AIRCRAFT IMPACT THE TUNDRA, OUT OF SIGHT FROM THE CAMP. PHOTOGRAPHS AND VIDEO OF THE WRECKAGE SHOW A STEEP NOSE DOWN CRUSH PATTERN, LEFT WING DAMAGE. GROUND SCARS SUPPORT A STEEP NOSE DOWN IMPACT AT LOW SPEED. THE AIRPLANE WRECKAGE RESTS NORMALLY ON UNDAMAGED CONVENTIONAL LANDING GEAR. FUEL WAS FOUND IN THE TANKS. WITNESSES RECALLED THE ENGINE 'SOUNDED NORMAL, AT LOW POWER' AT THE TIME OF THE AIR DROP.
NTSB Probable Cause
THE STUDENT PILOT ENTERED A LOW ALTITUDE STALL/MUSH DURING AN AIRDROP MANEUVER. FACTORS CONTRIBUTING TO THE ACCIDENT WERE: THE LOW PASS MANEUVER, AND THE IMPROPER ALTITUDE.
Full Narrative
THE STUDENT PILOT MADE A LOW LEVEL PASS TO DROP NEWSPAPERS TO A HUNTING CAMP. WITNESSES SAW A LEFT BANKING TURN AFTER THE PASS AND HEARD AIRCRAFT IMPACT THE TUNDRA, OUT OF SIGHT FROM THE CAMP. PHOTOGRAPHS AND VIDEO OF THE WRECKAGE SHOW A STEEP NOSE DOWN CRUSH PATTERN, LEFT WING DAMAGE. GROUND SCARS SUPPORT A STEEP NOSE DOWN IMPACT AT LOW SPEED. THE AIRPLANE WRECKAGE RESTS NORMALLY ON UNDAMAGED CONVENTIONAL LANDING GEAR. FUEL WAS FOUND IN THE TANKS. WITNESSES RECALLED THE ENGINE 'SOUNDED NORMAL, AT LOW POWER' AT THE TIME OF THE AIR DROP.
Flight
Event TypeAccident
Event Time17:33 AKDT
Nearest Airport0nm N
Runway0
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftCessna 170B
Tail NumberN1737D
Aircraft CategoryAir
DamageDestroyed
OperatorShawn E Imboden
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsContinental · C145 · Reciprocating · 145
Seats4
People & Injuries
Injury Summary2 injuries (2 serious injuries)
Fatal0
Serious2
Minor0
Uninjured0
Total2
Crew 1Age 32 · Third Class
Conditions
ConditionsVMC
LightDaylight
Wind180° @ 10 kt
Visibility10 sm
CeilingOvercast 1500 ft
Temperature / Dew Point45 C / 0 C
Altimeter0
Weather SourceWIT