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NTSB Report
January 14, 1989 · Cessna T210N · N5289Y
Florence, SC
Overview
Report Status
Probable Cause
Event Type
Accident
Date
January 14, 1989
Injury Outcomes
No injuries (2 uninjured)
Location
Florence, SC
Aircraft
Cessna T210N
Tail Number
N5289Y
Operator
Ron Jon
Injuries
None
Aircraft Damage
Substantial
NTSB Number
ATL89LA074
THE PILOT REPORTED HEARING A KNOCKING SOUND WHILE CLIMBING THROUGH 5000 FT AFTER TKOF. THE KNOCKING WAS FOLLOWED BY A LOUD NOISE AND ENGINE VIBRATION. THE PLT REPORTED THAT HE APPARENTLY HAD LOST A CYLINDER AND OIL PRESSURE WAS DROPPING. HE DECLARED AN EMERGENCY AND RECEIVED RADAR VECTORS. AFTER DESCENDING THROUGH CLOUDS, THE PLT REPORTED THAT SMOKE AND FLAMES WERE COMING FROM THE COWLING. THE PLT ELECTED TO MAKE A FORCED LDG IN A SMALL FIELD. ON TOUCHDOWN, THE NOSEGEAR COLLAPSED AND THE ACFT NOSED OVER. EXAM OF THE ENGINE REVEALED TWO BROKEN CONNECTING RODS AND THAT TWO CRANKCASE THROUGHBOLTS WERE UNDERTORQUED. THE CRANKSHAFT MN BRG HAD ROTATED, BLOCKING THE OIL PASSAGE TO THE OTHER CRANKSHAFT BRGS. OVERHEATING OF THE CONNECTING ROD JOURNALS AND BRGS WAS EVIDENT. THE NO 2 CYLINDER HAD BEEN REPLACED JAN 2, 1989, 28 HRS BEFORE THE ACDT.
NTSB Probable Cause
THE FAILURE OF MAINTENANCE PERSONNEL TO PROPERLY TORQUE THE THRU BOLTS DURING NUMBER 2 CYLINDER INSTALLATION. CONTRIBUTING FACTORS TO THE ACCIDENT WERE TERRAIN FEATURES WHICH LED TO THE COLLAPSE OF THE NOSE GEAR DURING LANDING.
Full Narrative
THE PILOT REPORTED HEARING A KNOCKING SOUND WHILE CLIMBING THROUGH 5000 FT AFTER TKOF. THE KNOCKING WAS FOLLOWED BY A LOUD NOISE AND ENGINE VIBRATION. THE PLT REPORTED THAT HE APPARENTLY HAD LOST A CYLINDER AND OIL PRESSURE WAS DROPPING. HE DECLARED AN EMERGENCY AND RECEIVED RADAR VECTORS. AFTER DESCENDING THROUGH CLOUDS, THE PLT REPORTED THAT SMOKE AND FLAMES WERE COMING FROM THE COWLING. THE PLT ELECTED TO MAKE A FORCED LDG IN A SMALL FIELD. ON TOUCHDOWN, THE NOSEGEAR COLLAPSED AND THE ACFT NOSED OVER. EXAM OF THE ENGINE REVEALED TWO BROKEN CONNECTING RODS AND THAT TWO CRANKCASE THROUGHBOLTS WERE UNDERTORQUED. THE CRANKSHAFT MN BRG HAD ROTATED, BLOCKING THE OIL PASSAGE TO THE OTHER CRANKSHAFT BRGS. OVERHEATING OF THE CONNECTING ROD JOURNALS AND BRGS WAS EVIDENT. THE NO 2 CYLINDER HAD BEEN REPLACED JAN 2, 1989, 28 HRS BEFORE THE ACDT.
Flight
Event TypeAccident
Event Time17:48 EST
Nearest AirportFlorence City (0nm N)
Runway18
Runway Length6498 ft
Runway Width150 ft
Flight Plan FiledIFR
Aircraft FireIflt
Aircraft ExplosionNo
Aircraft
AircraftCessna T210N
Tail NumberN5289Y
Aircraft CategoryAir
DamageSubstantial
OperatorRon Jon
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsContinental · TI0-520 · Reciprocating · 310
Seats6
People & Injuries
Injury SummaryNo injuries (2 uninjured)
Fatal0
Serious0
Minor0
Uninjured2
Total2
Crew 1Age 51 · Third Class
Conditions
ConditionsVMC
LightDusk
Wind360° @ 7 kt
Visibility7 sm
CeilingOvercast 1900 ft
Temperature / Dew Point39 C / 0 C
Altimeter30.00 inHg
Observation Time22:55