CHI91FA235

NTSB accident investigation · Aero Commander 500B · Silica, KS · July 31, 1991

Accident · FatalField investigationFinal report
Date
July 31, 1991, 07:59 local (12:59 UTC)
Place
Silica, KS
Injuries
2 fatal
Phase of flight
Maneuvering
Aircraft
N904DFAero Commander 500BN702CAAero Commander 500B
Weather
Visual (VMC) · Day
Status
Completed · report March 31, 1993
Report
Approved by Office Director
Case key
14912

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

The failure of both pilots to maintain adequate separation during formation flight. Related factors are overconfidence in personal ability and poor planning/decision.

The failure of both pilots to maintain adequate separation during formation flight. Related factors are overconfidence in personal ability and poor planning/decision.

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.

Midair collisionManeuvering
Planning/decision - poorPilot in commandFactor
Overconfidence in personal abilityPilot in commandFactor
Planning/decision - poorPilot of other aircraftFactor
Overconfidence in personal abilityPilot of other aircraftFactor
Formation flying
Visual separation - not maintainedPilot in commandCause
Visual separation - not maintainedPilot of other aircraftCause
Midair collisionManeuvering
Planning/decision - poorPilot in commandFactor
Overconfidence in personal abilityPilot in commandFactor
Planning/decision - poorPilot of other aircraftFactor
Overconfidence in personal abilityPilot of other aircraftFactor
Formation flying
Visual separation - not maintainedPilot in commandCause
Visual separation - not maintainedPilot of other aircraftCause

Analysis

Both aircraft departed wichita on IFR flight plans in VFR weather conditions. They flew northwest toward their respective destinations, and cancelled IFR about 20 minutes before the accident. ATC observed the airplanes on radar, and stated they were 'dogfighting back and forth' prior to the collision. One pilot's roommate reported the two pilots, who were close friends as well as co-workers, often cancelled IFR and flew in formation if the weather was VFR. He reported the pilots often videotaped each other, and he had watched some of the tapes. He stated 'it was hard to tell from the videotape how close they were because they could use the zoom feature, etc. You could read the n numbers.' Investigation revealed brown paint transfer on the bottom of the right wing of the blue and white airplane, which had separated and was located 1.5 miles from the main wreckage. There were light colored scuff marks on the top of the left engine nacelle of the brown and white airplane.

Both aircraft departed wichita on IFR flight plan in VFR weather conditions. They flew northwest toward their respective destinations, and cancelled IFR about 20 minutes before the accident. ATC observed the airplanes on radar, and stated they were 'dogfighting back and forth' prior to the collision. One pilot's roommate reported the two pilots, who were close friends as well as co-workers, often cancelled IFR and flew in formation if the weather was VFR. He reported the pilots often videotaped each other, and he had watched some of the tapes. He stated 'it was hard to tell from the videotape how close they were because they could use the zoom feature, etc. You could read the n numbers.' Investigation revealed brown paint transfer on the bottom of the right wing of the blue and white airplane, which had separated and was located 1.5 miles from the main wreckage. There were light colored scuff marks on the top of the left engine nacelle of the brown and white airplane.

Aircraft · 2

Registration
N904DF
Reported as
Aero Commander 500B
Category
Airplane
Serial number
1057-46
Airframe hours
11,546
Engine
Lycoming IO-540-E1A5, 290 horsepower, reciprocating
Damage
Destroyed
Flight
Part 135
Operator
Dewey E. Tower, doing business as Central Air Southwest
Airworthiness certificate
Standard, Normal
Last inspection
AAIP · June 10, 1991 · 63 hours before
Departed
ICT · Wichita, KS
Destination
HYS · Hays, KS
Flight plan
Unknown

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.

Registration
N702CA
Reported as
Aero Commander 500B
Category
Airplane
Serial number
1298-113
Airframe hours
12,747
Engine
Lycoming IO-540-E1A5, 290 horsepower, reciprocating
Damage
Destroyed
Flight
Part 135
Operator
Dewey E. Tower, doing business as Central Air Southwest
Airworthiness certificate
Standard, Normal
Last inspection
AAIP · July 12, 1991 · 14 hours before
Departed
ICT · Wichita, KS
Destination
GBD · Great Bend, KS
Flight plan
Unknown

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 · 2

As NTSB recorded them. NTSB leaves out names.

Role
Pilot, aircraft N904DF
Age
35
Certificates
Flight instructor, Commercial
Airplane ratings
Single-engine land, Multi-engine land
Instrument ratings
Airplane
Medical
Class 2, Valid Medical--no waivers/lim.
Toxicology
Performed
Flight hours
3,358 total · 724 in this make and model · 3,358 as pilot in command · 143 in the last 90 days · 48 in the last 30 days · 4 in the last 24 hours
Role
Pilot, aircraft N702CA
Age
26
Certificate
Commercial
Airplane ratings
Multi-engine land, Single-engine land
Instrument ratings
Airplane
Medical
Class 2, Valid Medical--w/ waivers/lim
Seat
Left
Toxicology
Performed
Flight hours
1,590 total · 322 in this make and model · 1,590 as pilot in command · 73 in the last 90 days · 22 in the last 30 days · 1 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
Calm
Visibility
15 statute miles
Lowest ceiling
None
Temperature
79 °F

FAA reports on this event · 2

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