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NTSB Report
March 24, 1993 · Pitts S2B · N876CB
Boulder, CO
Overview
Report Status
Probable Cause
Event Type
Accident
Date
March 24, 1993
Injury Outcomes
No injuries (2 uninjured)
Location
Boulder, CO
Aircraft
Pitts S2B
Tail Number
N876CB
Operator
Flatirons Aviation
Injuries
None
Aircraft Damage
Substantial
NTSB Number
DEN93LA035
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.
NTSB Probable Cause
THE PILOT IN COMMAND'S FAILURE TO MAINTAIN A VISUAL LOOKOUT. A FACTOR WAS: THE STUDENT PILOT'S RESTRICTED VISUAL LOOKOUT.
Full Narrative
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.
Flight
Event TypeAccident
Event Time13:10 MST
Nearest AirportBoulder Municipal (0nm)
Runway8
Runway Length4100 ft
Runway Width40 ft
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftPitts S2B
Tail NumberN876CB
Aircraft CategoryAir
DamageSubstantial
OperatorFlatirons Aviation
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsLycoming · AEIO-540-D4A5 · Reciprocating · 260
Seats2
People & Injuries
Injury SummaryNo injuries (2 uninjured)
Fatal0
Serious0
Minor0
Uninjured2
Total2
Crew 1Age 47 · First Class
Conditions
ConditionsVMC
LightDaylight
Wind120° @ 8 kt
Visibility60 sm
CeilingNone
Temperature / Dew Point10 C
Altimeter29.00 inHg
Observation Time19:51
Weather SourceWFAC