MIA90LA098

NTSB accident investigation · Waco YMF-5 · Marathon, FL · March 31, 1990

Accident · Minor injuriesLimited investigationFinal report
Date
March 31, 1990, 13:45 local (18:45 UTC)
Place
Marathon, FL
Injuries
1 minor
Damage
Substantial damage
Phase of flight
Takeoff
Aircraft
N89BWaco YMF-5
Weather
Visual (VMC) · Day
Status
Completed · report March 5, 1993
Report
Approved by Office Director
FAA report
19900331025369A
Case key
32643

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.

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Probable cause

Failure of the pilot to maintain directional control during takeoff, which resulted in an inadvertent ground swerve. Factors related to the accident were: the crosswind, the pilot's excessive compensation for the wind condition, and his lack of experience in the make and model of aircraft.

Sequence of events

NTSB’s coding before 2008: each occurrence and phase of flight, and the causes and factors under it. The codes are defined in NTSB’s coding manual.

Loss of control - on ground/waterTakeoff - roll/run
Weather condition - crosswindFactor
Compensation for wind conditions - excessivePilot in commandFactor
Directional control - not maintainedPilot in commandCause
Ground loop/swerve - inadvertentPilot in commandCause
Lack of total experience in type of aircraftPilot in commandFactor
Nose overTakeoff - aborted

Analysis

The pilot stated that he applied full left aileron for takeoff in a slight left crosswind. As the tail rose during the takeoff roll, the airplane veered to the left. The pilot applied right rudder, but the aircraft departed the runway in the direction of parked aircraft. The pilot reduced the throttle setting to idle, and subsequently, the aircraft nosed over. The pilot had only about 5 hours of flight time in this tailwheel equipped aircraft.

Aircraft

Registration
N89B
Reported as
Waco YMF-5
Category
Airplane
Serial number
F5006
Airframe hours
376
Engine
Jacobs R-755-B2, 275 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Operator
Marathon Fuel Farm
Registered owner
Marathon Fuel Farm
Airworthiness certificate
Standard, Utility
Last inspection
100 hour · December 11, 1989 · 82 hours before
Departed
MTH
Airport
MTH · Marathon, runway 25, 5,008 × 200 ft, asphalt

Matched to the registry by N-number and the event date; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.

Flight crew

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
29
Certificates
Flight instructor, Commercial
Airplane ratings
Single-engine land, Multi-engine land
Instrument ratings
Airplane
Medical
Unknown, Valid Medical--no waivers/lim.
Seat
Center
Flight hours
330 total · 5 in this make and model · 95 as pilot in command · 25 in the last 90 days · 10 in the last 30 days · 1 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
210° at 8 knots
Visibility
15 statute miles
Lowest ceiling
None
Temperature
81 °F, dew point 63 °F
Altimeter
29.00 inHg
Observed at
EYW, 26 nm away

FAA reports on this event · 1

The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.

Other investigations on N89B · 3

Matched to the same aircraft by N-number and date.