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NTSB Report
January 9, 1990 · Mitsubishi MU-2B-25 · N666HB
Jacksonville, FL
Overview
Report Status
Probable Cause
Event Type
Accident
Date
January 9, 1990
Injury Outcomes
No injuries (1 uninjured)
Location
Jacksonville, FL
Aircraft
Mitsubishi MU-2B-25
Tail Number
N666HB
Operator
Riggs Charles A
Injuries
None
Aircraft Damage
Substantial
NTSB Number
MIA90LA051
THE LT PROP & ENG WERE FEATHERED & SECURED DUE TO LOW OIL PRESSURE. THE PLT DIVERTED TO AN ALTERNATE ARPT. DURING FINAL APCH WITH A LANDING CONFIGURATION, HE APPLIED POWER, BUT THE RT ENG PROVIDED ONLY ABOUT 40% TORQUE. ATMTS TO CORRECT THE PROBLEM WERE UNSUCCESSFUL. THE PLT RETRACTED THE GEAR & DITCHED THE ACFT. EXAM OF LT ENG NACELLE REVEALED OIL LEAKAGE FROM AN UNKNOWN SOURCE, WHICH DEPLETED THE OIL SUPPLY. THE RT ENG CONDITION & POWER LEVERS WERE OPERATIONALLY CHECKED. WHEN MOVED, THE LINKAGE AT THE PROP GOVERNOR DID NOT MOVE; THE FUEL CONTROL CONCENTRIC SHAFT CONTROL LINKAGE ASSY WAS 'STIFF.' NO DETERMINATION COULD BE MADE AS TO WHY THE PROP GOVERNOR DID NOT MOVE WHEN THE CONDITION LEVER WAS MOVED. THE RT ENG WAS REMOVED FOR AN ENG RUN. IT OPERATED NORMALLY. THE PROP GOVERNOR & PROP PITCH CONTROL WERE TESTED; THEY OPERATED NORMALLY. THE LAST ANNUAL INSPN WAS DATED 3/5/84. A 100 HR INSPN OF THE AIRFRAME (ONLY) WAS PERFORMED 2.3 FLT HRS BEFORE THE ACDNT. THE ENG LOGBOOKS WERE NOT LOCATED.
NTSB Probable Cause
FAILURE OF THE OWNER/OPERATOR TO OBTAIN PROPER MAINTENANCE AND INSPECTION OF THE AIRCRAFT. FACTORS RELATED TO THE ACCIDENT WERE: OPERATION OF THE AIRCRAFT BY THE PILOT WITHOUT A CURRENT ANNUAL INSPECTION (KNOWN DEFICIENCY), AN OIL LEAK IN THE LEFT ENGINE WHICH RESULTED IN OIL EXHAUSTION, AND AN UNDETERMINED PROPELLER CONTROL LINKAGE PROBLEM WITH THE RIGHT ENGINE.
Full Narrative
THE LT PROP & ENG WERE FEATHERED & SECURED DUE TO LOW OIL PRESSURE. THE PLT DIVERTED TO AN ALTERNATE ARPT. DURING FINAL APCH WITH A LANDING CONFIGURATION, HE APPLIED POWER, BUT THE RT ENG PROVIDED ONLY ABOUT 40% TORQUE. ATMTS TO CORRECT THE PROBLEM WERE UNSUCCESSFUL. THE PLT RETRACTED THE GEAR & DITCHED THE ACFT. EXAM OF LT ENG NACELLE REVEALED OIL LEAKAGE FROM AN UNKNOWN SOURCE, WHICH DEPLETED THE OIL SUPPLY. THE RT ENG CONDITION & POWER LEVERS WERE OPERATIONALLY CHECKED. WHEN MOVED, THE LINKAGE AT THE PROP GOVERNOR DID NOT MOVE; THE FUEL CONTROL CONCENTRIC SHAFT CONTROL LINKAGE ASSY WAS 'STIFF.' NO DETERMINATION COULD BE MADE AS TO WHY THE PROP GOVERNOR DID NOT MOVE WHEN THE CONDITION LEVER WAS MOVED. THE RT ENG WAS REMOVED FOR AN ENG RUN. IT OPERATED NORMALLY. THE PROP GOVERNOR & PROP PITCH CONTROL WERE TESTED; THEY OPERATED NORMALLY. THE LAST ANNUAL INSPN WAS DATED 3/5/84. A 100 HR INSPN OF THE AIRFRAME (ONLY) WAS PERFORMED 2.3 FLT HRS BEFORE THE ACDNT. THE ENG LOGBOOKS WERE NOT LOCATED.
Flight
Event TypeAccident
Event Time17:35 EST
Nearest AirportCraig Muni (0nm N)
Runway0
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftMitsubishi MU-2B-25
Tail NumberN666HB
Aircraft CategoryAir
DamageSubstantial
OperatorRiggs Charles A
Operating RulePart 91
Engines2
Engine TypeTurboprop
Engine DetailsGarrett · TPE-331M · Turboprop · 665
Seats7
People & Injuries
Injury SummaryNo injuries (1 uninjured)
Fatal0
Serious0
Minor0
Uninjured1
Total1
Crew 1Age 39 · First Class
Conditions
ConditionsVMC
LightDaylight
Wind220° @ 5 kt
Visibility7 sm
CeilingBroken clouds 10000 ft
Temperature / Dew Point54 / 48
Altimeter30.00 inHg
Observation Time22:43
Weather SourceWFAC