MIA90LA051

NTSB accident investigation · Mitsubishi MU-2B-25 · Jacksonville, FL · January 9, 1990

Accident · No injuriesLimited investigationFinal report
Date
January 9, 1990, 17:35 local (22:35 UTC)
Place
Jacksonville, FL
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Enroute
Aircraft
N666HBMitsubishi MU-2B-25
Weather
Visual (VMC) · Day
Status
Completed · report September 17, 1992
Report
Approved by Office Director
FAA report
19900109000339A
Case key
32612

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.

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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.

Sequence of events

NTSB’s coding before 2008: each occurrence and phase of flight, and the causes and factors under it. The codes are defined in NTSB’s coding manual.

Loss of engine power(partial) - nonmechanicalCruise - normal
1 engine
Maintenance,annual inspection - not performedCompany/operator managementCause
Operation with known deficiencies in equipment - performedPilot in commandFactor
Lubricating system - leakFactor
Fluid,oil - exhaustionFactor
Propeller feathering - performedPilot in command
InitiatedPilot in command
Precautionary landing - initiatedPilot in command
Loss of engine power(partial) - mech failure/malfApproach - vfr pattern - final approach
1 engine - output low
Propeller control,linkage - undeterminedFactor
Forced landingLanding
DitchingLanding

Analysis

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.

Aircraft

Registration
N666HB
Reported as
Mitsubishi MU-2B-25
Category
Airplane
Serial number
281
Airframe hours
3,353
Engine
Garrett TPE-331M, 665 horsepower, turbo prop
Damage
Substantial damage
Flight
Business · Part 91
Operator
Riggs, Charles A.
Registered owner
Riggs, Charles A
Airworthiness certificate
Standard, Normal
Last inspection
100 hour · December 11, 1989 · 2 hours before
Departed
AGS · Augusta, GA
Destination
VRB · Vero Beach, FL
Airport
CRG · Craig Muni

Matched to the registry by N-number and the event date; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.

Flight crew

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
39
Certificate
Airline transport
Airplane ratings
Multi-engine land, Single-engine land
Instrument ratings
Airplane
Medical
Class 1, Valid Medical--w/ waivers/lim
Seat
Left
Flight hours
14,000 total · 600 in this make and model · 13,500 as pilot in command · 51 in the last 90 days · 5 in the last 30 days · 1 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
220° at 5 knots
Visibility
7 statute miles
Lowest ceiling
10,000 ft broken
Temperature
54 °F, dew point 48 °F
Altimeter
30.00 inHg
Observed at
CRG, 4 nm away

FAA reports on this event · 1

The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.