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NTSB Report
December 25, 2015 · Waco YMF NO Series · N99Y
Fullerton, CA
Overview
Report Status
Final with probable cause
Event Type
Accident
Date
December 25, 2015
Injury Outcomes
No injuries (2 uninjured)
Location
Fullerton, CA
Aircraft
Waco YMF NO Series (1986)
Tail Number
N99Y
Operator
Scotty Box R&D
Injuries
None
Aircraft Damage
Substantial
NTSB Number
GAA16CA089
The pilot of the tailwheel-equipped biplane reported that during the landing roll, a gust of wind lifted the right wing. The airplane started to ground-loop to the right, the left main landing gear collapsed, and left wing impacted the ground. The airplane sustained substantial damage to the bottom left wing. The pilot reported that there were no pre-impact mechanical failures or malfunctions with the airframe or engine that would have precluded normal operation. The automated weather reporting station located at Fullerton Municipal Airport reported at 1553 Pacific standard time, wind from 300 degrees at 10 knots, wind gust 20 knots, 10 miles visibility, clear sky, temperature 59 degrees Fahrenheit (F), dew point 16 degrees F, and a barometric pressure of 30.01 inches of mercury.
NTSB Probable Cause
Aircraft-Aircraft oper/perf/capability-Performance/control parameters-Directional control-Not attained/maintained - C
Full Narrative
The pilot of the tailwheel-equipped biplane reported that during the landing roll, a gust of wind lifted the right wing. The airplane started to ground-loop to the right, the left main landing gear collapsed, and left wing impacted the ground. The airplane sustained substantial damage to the bottom left wing. The pilot reported that there were no pre-impact mechanical failures or malfunctions with the airframe or engine that would have precluded normal operation. The automated weather reporting station located at Fullerton Municipal Airport reported at 1553 Pacific standard time, wind from 300 degrees at 10 knots, wind gust 20 knots, 10 miles visibility, clear sky, temperature 59 degrees Fahrenheit (F), dew point 16 degrees F, and a barometric pressure of 30.01 inches of mercury.
Flight
Event TypeAccident
Event Time15:35 PST
Nearest AirportFullerton Muni (0nm ENE)
Runway24
Runway Length3121 ft
Runway Width75 ft
Flight Plan FiledNone
Flight Plan ActivatedNo
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftWaco YMF NO Series
Tail NumberN99Y
Aircraft CategoryAir
DamageSubstantial
OperatorScotty Box R&D
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsJacobs · R755-B2 · Reciprocating · 275
Seats2
People & Injuries
Injury SummaryNo injuries (2 uninjured)
Fatal0
Serious0
Minor0
Uninjured2
Total2
Crew 1Age 46 · Second Class · None
Crew 2None
Conditions
ConditionsVMC
LightDaylight
Wind300° @ 10 kt, gusting 21 kt
Visibility10 sm
CeilingNone
Temperature / Dew Point59 / 16 C
Altimeter30.01 inHg
Observation Time23:53
Weather SourceWFAC