DEN93LA035

NTSB accident investigation · Pitts S2B · Boulder, CO · March 24, 1993

Accident · No injuriesLimited investigationFinal report
Date
March 24, 1993, 13:10 local (20:10 UTC)
Place
Boulder, CO
Injuries
2 uninjured
Damage
Substantial damage
Phase of flight
Approach
Aircraft
N876CBPitts S2B
Weather
Visual (VMC) · Day
Status
Completed · report October 25, 1993
Report
Approved by Office Director
FAA report
19930324006729A
Case key
18277

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 pilot in command's failure to maintain a visual lookout. A factor was: the student pilot's restricted visual lookout.

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.

In flight collision with objectApproach - vfr pattern - base leg/base to final
Visual lookout - not maintainedPilot in command(cfi)Cause
Visual lookout - restrictedDual studentFactor
Emergency procedure - simulatedPilot in command(cfi)

Analysis

The instructor decided to simulate a power loss by closing the throttle. The student responded by turning towards the active runway. When it became apparent the airplane was at too low an altitude to glide to the runway, the instructor told the student to add power and she did. The instructor said he saw trees on both sides of the airplane that the airplane would clear. He did not, however, see a tree directly in front of the airplane. The airplane struck the tree. The instructor took control and landed without further incident.

Aircraft

Registration
N876CB
Reported as
Pitts S2B
Category
Airplane
Serial number
5033
Airframe hours
1,660
Engine
Lycoming AEIO-540-D4A5, 260 horsepower, reciprocating
Damage
Substantial damage
Flight
Instructional · Part 91
Operator
Flatirons Aviation, Inc.
Registered owner
New Attitude Aerobatics, Inc.
Airworthiness certificate
Standard, Aerobatic; Standard, Normal
Last inspection
100 hour · November 30, 1992 · 76 hours before
Departed
1V5
Destination
1V5
Airport
1V5 · Boulder Municipal, runway 8, 4,100 × 40 ft, dirt

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
47
Certificates
Commercial, Flight instructor, Flight engineer, Airline transport
Airplane ratings
Multi-engine land, Single-engine land
Instrument ratings
Airplane
Medical
Class 1, Valid Medical--w/ waivers/lim
Seat
Front
Flight hours
14,100 total · 503 in this make and model · 6,658 as pilot in command · 100 in the last 90 days · 20 in the last 30 days · 1 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
120° at 8 knots
Visibility
60 statute miles
Lowest ceiling
None
Temperature
72 °F, dew point 10 °F
Altimeter
29.00 inHg
Observed at
BJC, 11 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 N876CB · 1

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