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NTSB Report
November 30, 1986 · Robinson R-22 · N9006W
Tucson, AZ
Overview
Report Status
Preliminary report
Event Type
Accident
Date
November 30, 1986
Injury Outcomes
2 injuries (2 minor injuries)
Location
Tucson, AZ
Aircraft
Robinson R-22
Tail Number
N9006W
Operator
Arizona Wing & Rotor
Injuries
Minor
Aircraft Damage
Destroyed
NTSB Number
LAX87DUJ01
AFTER 50 MINUTES OF CRUISE FLIGHT, THE PILOT OBSERVED A DECREASE IN OIL PRESSURE TO ZERO AND THE ILLUMINATION OF THE LOW OIL PRESSURE LIGHT. THE PILOT LANDED THE HELICOPTER AND HAD AN AIRFRAME AND POWERPLANT MECHANIC INSPECT THE AIRCRAFT. THERE WERE NO PROBLEMS OBSERVED. THE PILOT TOOK OFF AND CONTINUED THE INSTRUCTIONAL FLIGHT, LETTING HIS STUDENT TAKE OVER THE CONTROLS. AFTER 20 MINUTES OF NORMAL OPERATION AND ON FINAL APPROACH FOR LANDING AT 75 FT AGL AND 50 KNOTS, THE LOW OIL PRESSURE LIGHT ILLUMINATED. THE ENGINE STOPPED RUNNING. THE INSTRUCTOR TOOK OVER CONTROL OF THE AIRCRAFT AND ATTEMPTED AN AUTOROTATION. THE AIRCRAFT COLLIDED WITH THE TERRAIN AT AN AIRSPEED OF 35 TO 40 KNOTS. A TEARDOWN OF THE ENGINE REVEALED THAT THE NUMBER TWO CONNECTING ROD HAD FAILED.
Full Narrative
AFTER 50 MINUTES OF CRUISE FLIGHT, THE PILOT OBSERVED A DECREASE IN OIL PRESSURE TO ZERO AND THE ILLUMINATION OF THE LOW OIL PRESSURE LIGHT. THE PILOT LANDED THE HELICOPTER AND HAD AN AIRFRAME AND POWERPLANT MECHANIC INSPECT THE AIRCRAFT. THERE WERE NO PROBLEMS OBSERVED. THE PILOT TOOK OFF AND CONTINUED THE INSTRUCTIONAL FLIGHT, LETTING HIS STUDENT TAKE OVER THE CONTROLS. AFTER 20 MINUTES OF NORMAL OPERATION AND ON FINAL APPROACH FOR LANDING AT 75 FT AGL AND 50 KNOTS, THE LOW OIL PRESSURE LIGHT ILLUMINATED. THE ENGINE STOPPED RUNNING. THE INSTRUCTOR TOOK OVER CONTROL OF THE AIRCRAFT AND ATTEMPTED AN AUTOROTATION. THE AIRCRAFT COLLIDED WITH THE TERRAIN AT AN AIRSPEED OF 35 TO 40 KNOTS. A TEARDOWN OF THE ENGINE REVEALED THAT THE NUMBER TWO CONNECTING ROD HAD FAILED.
Flight
Event TypeAccident
Event Time11:35 MST
Nearest AirportTucson Int'L (0nm N)
Runway0
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftRobinson R-22
Tail NumberN9006W
Aircraft CategoryHeli
DamageDestroyed
OperatorArizona Wing & Rotor
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsLycoming · O-320-B2C · Reciprocating · 160
Seats2
People & Injuries
Injury Summary2 injuries (2 minor injuries)
Fatal0
Serious0
Minor2
Uninjured0
Total2
Crew 1Age 29 · Second Class
Conditions
ConditionsVMC
LightDaylight
WindCalm
CeilingNone
Temperature / Dew Point0 C / 0 C
Altimeter31.00 inHg
Weather SourcePILO