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NTSB Report
July 8, 2023 · Aerofab LA-4 180 · N993PT
Big Prairie, MI
Overview
Report Status
Probable Cause
Event Type
Accident
Date
July 8, 2023
Injury Outcomes
No injuries (2 uninjured)
Location
Big Prairie, MI
Aircraft
Aerofab LA-4 180 (1966)
Tail Number
N993PT
Injuries
None
Aircraft Damage
Substantial
NTSB Number
CEN23LA287
The flight instructor and pilot receiving instruction were completing water landings in the amphibious airplane. They had already completed several landings on the same pond without incident. During the accident landing, upon touchdown the airplane impacted a submerged log, which punctured a large hole in the hull. The pilots egressed without further incident and the airplane sank. The pilot reported no preimpact mechanical malfunctions or failures with the airplane that would have precluded normal operation.
NTSB Probable Cause
Environmental issues-Physical environment-Object/animal/substance-Hidden/submerged object-Awareness of condition
Full Narrative
The flight instructor and pilot receiving instruction were completing water landings in the amphibious airplane. They had already completed several landings on the same pond without incident. During the accident landing, upon touchdown the airplane impacted a submerged log, which punctured a large hole in the hull. The pilots egressed without further incident and the airplane sank. The pilot reported no preimpact mechanical malfunctions or failures with the airplane that would have precluded normal operation.
Flight
Event TypeAccident
Event Time09:10 EDT
Nearest Airport0nm
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftAerofab LA-4 180
Tail NumberN993PT
Aircraft CategoryAir
DamageSubstantial
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsLycoming · O-360-A1A · Reciprocating · 180
Seats4
People & Injuries
Injury SummaryNo injuries (2 uninjured)
Fatal0
Serious0
Minor0
Uninjured2
Total2
Crew 1Age 55 · Basc · None
Crew 2Age 56 · First Class · None
Conditions
ConditionsVMC
LightDaylight
Wind180° @ 4 kt
Visibility10 sm
CeilingBroken clouds 4100 ft
Temperature / Dew Point63 F / 57 F
Altimeter29.89 inHg
Observation Time08:55
Weather SourceWFAC