MKC86LA015

NTSB accident investigation · Mooney MK21 · Warren, AR · October 25, 1985

Accident · Minor injuriesLimited investigationFinal report
Date
October 24, 1985, 21:50 local (Oct 25, 1985, 02:50 UTC)
Place
Warren, AR
Injuries
1 minor
Damage
Substantial damage
Phase of flight
Enroute
Aircraft
N3399XMooney MK21
Weather
Visual (VMC) · Night/dark
Status
Completed
Report
Approved by Office Director
FAA report
19851024056299A
Case key
34108

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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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) - mech failure/malfCruise - normal
Engine instruments,oil pressure gage - pressure too low
Lubricating system - failure,partialCause
Loss of engine power(total) - mech failure/malfManeuvering
Engine assembly,bearing - failure,totalCause
Engine assembly,connecting rod - failure,totalCause
Fluid,oil - starvationCause
Forced landingDescent - emergency
In flight collision with terrain/waterLanding - flare/touchdown
Terrain condition - groundFactor
Proper glidepath - not maintainedPilot in commandCause

Analysis

At cruise level flt the plt rptd a malfunctioning engine. The plt was cleared to descend to an airport in the vicinity. The precautionary landing was initiated due to an oil pressure decline. Approaching for the landing the plt rptd the engine completely quit which made a landingat the airport impossible. A teardown inspection of the engine revealed that the number 1 connecting rod was broken with signs of extreme over heating to the point of melting and performing the connecting rod and cap. The rod bearing was severely worn to a point of being paper thin. The oil journal was clogged with metal debris. The lack of lubrication was confined to this cylinder.

Aircraft

Registration
N3399X
Reported as
Mooney MK21
Category
Airplane
Serial number
1106
Airframe hours
3,442
Engine
Lycoming I0360 AIA, 180 horsepower, reciprocating
Damage
Substantial damage
Flight
Business · Part 91
Operator
Earl L.Kirkpatrick
Registered owner
Earl L. Kirkpatrick
Airworthiness certificate
Standard, Normal
Last inspection
Annual · October 1, 1984
Departed
BHM · Birmingham, AL
Destination
FTW · Forth Worth, TX
Flight plan
IFR

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
50
Certificate
Private
Airplane ratings
Single-engine land
Instrument ratings
Airplane
Medical
Class 2, Valid Medical--w/ waivers/lim
Seat
Left
Flight hours
1,105 total · 540 in this make and model · 888 as pilot in command · 44 in the last 90 days · 3 in the last 24 hours

Weather

Conditions
Visual (VMC) · Night/dark
Wind
Calm
Visibility
5 statute miles
Lowest ceiling
None
Temperature
68 °F, dew point 64 °F
Altimeter
30.00 inHg
Observed at
PBF, 32 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.