LAX97LA201

NTSB accident investigation · Boeing Stearman A75N1 · Lemoore, CA · June 7, 1997

Accident · No injuriesLimited investigationFinal report
Date
June 7, 1997, 08:10 local (15:10 UTC)
Place
Lemoore, CA
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N450MFBoeing Stearman A75N1
Weather
Visual (VMC) · Day
Status
Completed · report May 21, 1998
Report
Approved by Office Director
FAA report
19970607013599A
Case key
29805

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

On this page

Probable cause

failure of the pilot to maintain directional control of the airplane during the landing, which resulted in a ground swerve and subsequent overload failure of the main landing gear. Related factors were a left crosswind and partial loss of the right wheel brake.

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/waterLanding - roll
Landing gear,normal brake system - loss,partialFactor
Directional control - not maintainedPilot in commandCause
Ground loop/swerve - inadvertentPilot in commandCause
Main gear collapsedLanding
Landing gear,main gear - overload

Analysis

The pilot stated that he was unable to control a sudden swerve to the left during the landing rollout, so he added full power to go around. The power application torqued the airplane into a fully developed ground loop from which it came to rest after approximately 135 degrees of turn. During the turn, both main gear collapsed, allowing the propeller to contact the runway surface. The pilot also stated that the right brake faded during the landing rollout, and he felt that this contributed to his inability to control the initial swerve.

Factual narrative

On June 7, 1997, at 0810 hours Pacific daylight time, a Boeing Stearman A75N1, N450MF, was substantially damaged when it ground looped during landing at Lemoore Naval Air Station, Lemoore, California. There was no injury to the solo commercial pilot. The flight departed Hanford, California, at 0750 with visual meteorological conditions prevailing for the personal flight.

The pilot stated that, during the landing rollout, the airplane started a swerve to the left so he added full power to go around. The power application torqued the airplane into a fully developed ground loop from which it came to rest after approximately 135 degrees of turn. During the turn, both main gear collapsed, allowing the propeller to strike the runway surface several times. The pilot also stated that the right brake faded during the landing rollout and he felt that this contributed to the inability to control the initial swerve.

Aircraft

Registration
N450MF
Reported as
Boeing Stearman A75N1
Category
Airplane
Serial number
75-6618
Engine
P&W R-985-AN-1, 450 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Operator
Ronald A. Caraway
Registered owner
Stearman Restorations Inc.
Airworthiness certificate
Standard, Normal; Standard, Aerobatic
Last inspection
Annual · September 10, 1996 · 120 hours before
Departed
018 · Hanford, CA
Destination
NLC · CA
Airport
NLC · Nas Lemoore/Reeves, runway 26L, 13,500 × 150 ft, concrete

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
60
Certificates
Commercial, Flight instructor
Airplane ratings
Single-engine land
Instrument ratings
Airplane
Medical
Class 2, Valid Medical--w/ waivers/lim
Seat
Rear
Flight hours
4,712 total · 129 in this make and model · 4,554 as pilot in command · 38 in the last 90 days · 12 in the last 30 days · 4 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
20° at 4 knots
Visibility
20 statute miles
Lowest ceiling
None
Temperature
79 °F, dew point 3 °F
Altimeter
29.00 inHg
Observed at
NLC, 1 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.