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NTSB Report
August 19, 2023 · Grumman American Avn AA-5B · N4537Y
Lone Pine, CA
Overview
Report Status
Probable Cause
Event Type
Accident
Date
August 19, 2023
Injury Outcomes
2 injuries (1 serious injury, 1 minor injury)
Location
Lone Pine, CA
Aircraft
Grumman American Avn AA-5B (1979)
Tail Number
N4537Y
Injuries
Serious
Aircraft Damage
Substantial
NTSB Number
WPR23LA322
The pilot reported that, while conducting a low pass over an off-airport landing strip at an altitude of 100 ft above the ground, the airplane encountered a downdraft. The pilot felt the airplane was unable to climb out of the valley without stalling, so he maintained airspeed, but the airplane descended and impacted the ground. The airplane subsequently rebounded and came to a rest in an upright position, which resulted in substantial damage to both wings, fuselage, and empennage. The pilot reported that there were no preaccident mechanical malfunctions or failures with the airplane that would have precluded normal operation.
NTSB Probable Cause
The pilot's inability to maintain altitude after encountering a downdraft, which resulted in collision with terrain.
Full Narrative
The pilot reported that, while conducting a low pass over an off-airport landing strip at an altitude of 100 ft above the ground, the airplane encountered a downdraft. The pilot felt the airplane was unable to climb out of the valley without stalling, so he maintained airspeed, but the airplane descended and impacted the ground. The airplane subsequently rebounded and came to a rest in an upright position, which resulted in substantial damage to both wings, fuselage, and empennage. The pilot reported that there were no preaccident mechanical malfunctions or failures with the airplane that would have precluded normal operation.
Flight
Event TypeAccident
Event Time19:10 PDT
Nearest Airport0nm
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftGrumman American Avn AA-5B
Tail NumberN4537Y
Aircraft CategoryAir
DamageSubstantial
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsLycoming · A4K · Reciprocating · 180
Seats4
People & Injuries
Injury Summary2 injuries (1 serious injury, 1 minor injury)
Fatal0
Serious1
Minor1
Uninjured0
Total2
Crew 1Serious
Crew 2Age 61 · Third Class · Minor
Conditions
ConditionsVMC
LightDaylight
Wind140° @ 5 kt
Visibility10 sm
CeilingNone
Temperature / Dew Point36 F
Altimeter29.92 inHg
Observation Time11:56
Weather SourceWFAC