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NTSB Report
August 24, 1989 · Cessna T210F · N6121R
Englewood, CO
Overview
Report Status
Probable Cause
Event Type
Accident
Date
August 24, 1989
Injury Outcomes
2 injuries (1 serious injury, 1 minor injury)
Location
Englewood, CO
Aircraft
Cessna T210F
Tail Number
N6121R
Injuries
Serious
Aircraft Damage
Substantial
NTSB Number
DEN89LA199
THE INSTRUCTOR PILOT (CFI) & DUAL STUDENT WERE PRACTICING SIMULATED INSTRUMENT APCHS. DRG AN APCH, THE LANDING GEAR FAILED TO EXTEND. THE PILOTS WERE UNABLE TO EXTEND THE GEAR BY USING EITHER THE NORMAL OR EMERGENCY SYSTEMS. SUBSEQUENTLY, AN APCH WAS MADE TO RWY 17 FOR A WHEELS UP LANDING. TO MINIMIZE THE RISKS OF SPARKS & FIRE, THE CFI ELECTED TO LAND THE ACFT ON DIRT, SHORT OF THE THRESHOLD, THEN ALLOW THE ACFT TO SKID ONTO THE PAVED RWY. HOWEVER, HE WAS UNAWARE OF A 6 INCH LIP AT THE RWY THRESHOLD. THE CFI RPRTD THAT DRG THE WHEELS UP LANDING, THE ACFT STRUCK THE RAISED LIP, WHICH RESULTED IN A HARD IMPACT. THE CFI RECEIVED A COMPRESSION FRACTURE OF HIS BACK. A POST-ACDNT EXAM OF THE HYDRAULIC POWER UNIT REVEALED A 'LEE PLUG' HAD 'BLOWN OUT.' WITH THE PLUG OUT, NO ENG DRIVEN OR EMERGENCY PUMP PRESSURE COULD HAVE BEEN APPLIED TO THE GEAR EXTENSION SYSTEM.
NTSB Probable Cause
A FAILURE IN THE HYRDRAULIC POWER UNIT, WHICH PREVENTED OPERATION OF EITHER THE NORMAL OR EMERGENCY GEAR EXTENSION SYSTEMS. THE RAISED RUNWAY LIP CONTRIBUTED TO AIRCRAFT DAMAGE AND PILOT INJURY.
Full Narrative
THE INSTRUCTOR PILOT (CFI) & DUAL STUDENT WERE PRACTICING SIMULATED INSTRUMENT APCHS. DRG AN APCH, THE LANDING GEAR FAILED TO EXTEND. THE PILOTS WERE UNABLE TO EXTEND THE GEAR BY USING EITHER THE NORMAL OR EMERGENCY SYSTEMS. SUBSEQUENTLY, AN APCH WAS MADE TO RWY 17 FOR A WHEELS UP LANDING. TO MINIMIZE THE RISKS OF SPARKS & FIRE, THE CFI ELECTED TO LAND THE ACFT ON DIRT, SHORT OF THE THRESHOLD, THEN ALLOW THE ACFT TO SKID ONTO THE PAVED RWY. HOWEVER, HE WAS UNAWARE OF A 6 INCH LIP AT THE RWY THRESHOLD. THE CFI RPRTD THAT DRG THE WHEELS UP LANDING, THE ACFT STRUCK THE RAISED LIP, WHICH RESULTED IN A HARD IMPACT. THE CFI RECEIVED A COMPRESSION FRACTURE OF HIS BACK. A POST-ACDNT EXAM OF THE HYDRAULIC POWER UNIT REVEALED A 'LEE PLUG' HAD 'BLOWN OUT.' WITH THE PLUG OUT, NO ENG DRIVEN OR EMERGENCY PUMP PRESSURE COULD HAVE BEEN APPLIED TO THE GEAR EXTENSION SYSTEM.
Flight
Event TypeAccident
Event Time12:30 MDT
Nearest AirportCentennial (0nm N)
Runway17
Runway Length7000 ft
Runway Width75 ft
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftCessna T210F
Tail NumberN6121R
Aircraft CategoryAir
DamageSubstantial
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsContinental · TSIO-520-C · Reciprocating · 285
Seats4
People & Injuries
Injury Summary2 injuries (1 serious injury, 1 minor injury)
Fatal0
Serious1
Minor1
Uninjured0
Total2
Crew 1Age 54 · Second Class
Conditions
ConditionsVMC
LightDaylight
Wind210° @ 14 kt, gusting 20 kt
Visibility50 sm
CeilingNone
Temperature / Dew Point0 C
Altimeter0
Weather SourcePILO