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NTSB Report
January 19, 1992 · Cessna 150J · N50810
Pinyon, CA
Overview
Report Status
Probable Cause
Event Type
Accident
Date
January 19, 1992
Injury Outcomes
No injuries (2 uninjured)
Location
Pinyon, CA
Aircraft
Cessna 150J
Tail Number
N50810
Operator
Aviation Professionals
Injuries
None
Aircraft Damage
Substantial
NTSB Number
LAX92LA095
DURING A DUAL CROSS COUNTRY FLIGHT THE FLIGHT INSTRUCTOR (CFI) FLEW INTO AN AREA OF RISING MOUNTAINOUS TERRAIN. THE CFI PLANNED TO INSTRUCT HIS STUDENT IN MOUNTAIN FLYING TECHNIQUES. THE AIRPLANE ENCOUNTERED AN UPDRAFT AND THEN A DOWNDRAFT. THE CFI LOWERED THE WING FLAPS TO THE 10 DEGREE POSITION IN A BELIEF THAT SUCH ACTION WOULD ENHANCE THE AIRPLANE'S RATE OF CLIMB. THE AIRPLANE'S CLIMB PERFORMANCE WAS NOT ENHANCED AND REMAINED INADEQUATE TO OUT CLIMB THE RISING TERRAIN. THE AIRPLANE COLLIDED WITH A TREE AND THE SIDE OF A HILL.
NTSB Probable Cause
THE FLIGHT INSTRUCTOR'S INADEQUATE IN-FLIGHT PLANNING TO ENTER A MOUNTAINOUS AREA AT A LOW ALTITUDE, AND HIS IMPROPER HANDLING OF THE AIRPLANE. FACTORS WHICH CONTRIBUTED TO THE ACCIDENT RELATED TO THE INSTRUCTOR'S LOWERING OF THE WING FLAPS DURING A TIME WHEN A DOWNDRAFT WAS ENCOUNTERED AND THE TERRAIN WAS RISING.
Full Narrative
DURING A DUAL CROSS COUNTRY FLIGHT THE FLIGHT INSTRUCTOR (CFI) FLEW INTO AN AREA OF RISING MOUNTAINOUS TERRAIN. THE CFI PLANNED TO INSTRUCT HIS STUDENT IN MOUNTAIN FLYING TECHNIQUES. THE AIRPLANE ENCOUNTERED AN UPDRAFT AND THEN A DOWNDRAFT. THE CFI LOWERED THE WING FLAPS TO THE 10 DEGREE POSITION IN A BELIEF THAT SUCH ACTION WOULD ENHANCE THE AIRPLANE'S RATE OF CLIMB. THE AIRPLANE'S CLIMB PERFORMANCE WAS NOT ENHANCED AND REMAINED INADEQUATE TO OUT CLIMB THE RISING TERRAIN. THE AIRPLANE COLLIDED WITH A TREE AND THE SIDE OF A HILL.
Flight
Event TypeAccident
Event Time12:00 PST
Nearest Airport0nm N
Runway0
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftCessna 150J
Tail NumberN50810
Aircraft CategoryAir
DamageSubstantial
OperatorAviation Professionals
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsContinental · O-200 · Reciprocating · 100
Seats2
People & Injuries
Injury SummaryNo injuries (2 uninjured)
Fatal0
Serious0
Minor0
Uninjured2
Total2
Crew 1Age 20 · First Class
Conditions
ConditionsVMC
LightDaylight
Wind90° @ 10 kt, gusting 12 kt
Visibility99 sm
CeilingNone
Temperature / Dew Point0 C
Altimeter0
Weather SourcePILO