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NTSB Report
April 3, 1992 · Piper PA-23-250 · N6460Y
Denver, CO
Overview
Report Status
Probable Cause
Event Type
Accident
Date
April 3, 1992
Injury Outcomes
No injuries (2 uninjured)
Location
Denver, CO
Aircraft
Piper PA-23-250
Tail Number
N6460Y
Operator
Richard D Sunderland
Injuries
None
Aircraft Damage
Substantial
NTSB Number
FTW92LA110
A CFI WAS INSTRUCTING AN INSTRUMENT RATED COMMERCIAL PILOT. DURING A PRACTICE MISSED APPROACH, THE LANDING GEAR FAILED TO RETRACT. THE CREW ATTEMPTED TO LOWER THE LANDING GEAR USING ALL AVAILABLE EMERGENCY PROCEDURES. A FLY-BY THE TOWER REVEALED THAT THE MAIN GEARS WERE DOWN WHILE THE NOSE LANDING GEAR WAS IN TRANSIT. DURING LANDING ROLLOUT, THE NOSE GEAR COLLAPSED AS SOON AS IT MADE CONTACT WITH THE RUNWAY. THE GEAR MALFUNCTION WAS THE RESULT OF A RUPTURED HYDRAULIC FLUID LINE. THE DEPLETION OF THE HYDRAULIC FLUID RENDERED THE LANDING GEAR SYSTEM INOPERABLE.
NTSB Probable Cause
THE LOSS OF HYDRAULIC FLUID DUE TO A RUPTURED HYDRAULIC LINE IN THE LANDING GEAR SYSTEM.
Full Narrative
A CFI WAS INSTRUCTING AN INSTRUMENT RATED COMMERCIAL PILOT. DURING A PRACTICE MISSED APPROACH, THE LANDING GEAR FAILED TO RETRACT. THE CREW ATTEMPTED TO LOWER THE LANDING GEAR USING ALL AVAILABLE EMERGENCY PROCEDURES. A FLY-BY THE TOWER REVEALED THAT THE MAIN GEARS WERE DOWN WHILE THE NOSE LANDING GEAR WAS IN TRANSIT. DURING LANDING ROLLOUT, THE NOSE GEAR COLLAPSED AS SOON AS IT MADE CONTACT WITH THE RUNWAY. THE GEAR MALFUNCTION WAS THE RESULT OF A RUPTURED HYDRAULIC FLUID LINE. THE DEPLETION OF THE HYDRAULIC FLUID RENDERED THE LANDING GEAR SYSTEM INOPERABLE.
Flight
Event TypeAccident
Event Time10:05 MST
Nearest AirportJEFFCO (0nm)
Runway11
Runway Length9000 ft
Runway Width100 ft
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftPiper PA-23-250
Tail NumberN6460Y
Aircraft CategoryAir
DamageSubstantial
OperatorRichard D Sunderland
Operating RulePart 91
Engines2
Engine TypeReciprocating
Engine DetailsLycoming · IO-540-J4A5 · Reciprocating · 250
Seats5
People & Injuries
Injury SummaryNo injuries (2 uninjured)
Fatal0
Serious0
Minor0
Uninjured2
Total2
Crew 1Age 41 · First Class
Conditions
ConditionsVMC
LightDaylight
Wind240° @ 6 kt
Visibility80 sm
CeilingNone
Temperature / Dew Point66 F / 28 C
Altimeter29.00 inHg
Observation Time17:05
Weather SourceWFAC