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NTSB Report
April 3, 1992 · Cessna 210 · N7320E
Florence, SC
Overview
Report Status
Probable Cause
Event Type
Accident
Date
April 3, 1992
Injury Outcomes
No injuries (4 uninjured)
Location
Florence, SC
Aircraft
Cessna 210
Tail Number
N7320E
Operator
Held Daniel Z
Injuries
None
Aircraft Damage
Substantial
NTSB Number
ATL92LA073
WHILE CRUISING AT 5000 FEET MSL, THE PILOT EXPERIENCED A COMPLETE LOSS OF ENGINE POWER. THE PILOT ESTABLISHED AN EMERGENCY DESCENT FOR A FORCED LANDING IN A NEARBY FIELD. UPON TOUCHDOWN, THE NOSE WHEEL DUG INTO THE PLOWED FIELD AND THE AIRPLANE NOSED OVER. THE ENGINE EXAMINATION DISCLOSED THAT THE NO. 3 AND NO. 4 CONNECTING RODS WERE BROKEN AND THERE WAS A HOLE IN THE ENGINE CRANKCASE ADJACENT TO THE #4 CYLINDER. THE ENGINE TEARDOWN REVEALED THAT 2 COUNTERWEIGHT RETENTION RINGS HAD BEEN DISLODGED FROM THEIR NORMALLY INSTALLED POSITIONS. THE EXAMINATION ALSO REVEALED THAT THE RETENTION RINGS WERE INSTALLED WITH THE BEVELLED SIDE OF THE RING OUTBOARD AND THE FLAT SIDE INBOARD. ACCORDING TO THE ENGINE OVERHAUL MANUAL, THE FLAT SIDE OF THE RETENTION RINGS SHOULD BE INSTALLED OUTBOARD. THE REMAINING RETENTION RINGS WERE INSTALLED PROPERLY. HISTORICAL MAINTENANCE INFORMATION ON THE COUNTERWEIGHT WAS NOT RECOVERED.
NTSB Probable Cause
THE IMPROPER INSTALLATION OF THE ENGINE COUNTERWEIGHT RETENTION RINGS WHICH RESULTED IN THE SEPARATION OF THE RETENTION PIN, ALLOWING THE LEADING EDGE OF THE COUNTERWEIGHT TO STRIKE THE CRANKCASE. FACTORS IN THE ACCIDENT WERE THE SUBSEQENT LOSS OF POWER AND THE SOFT FIELD.
Full Narrative
WHILE CRUISING AT 5000 FEET MSL, THE PILOT EXPERIENCED A COMPLETE LOSS OF ENGINE POWER. THE PILOT ESTABLISHED AN EMERGENCY DESCENT FOR A FORCED LANDING IN A NEARBY FIELD. UPON TOUCHDOWN, THE NOSE WHEEL DUG INTO THE PLOWED FIELD AND THE AIRPLANE NOSED OVER. THE ENGINE EXAMINATION DISCLOSED THAT THE NO. 3 AND NO. 4 CONNECTING RODS WERE BROKEN AND THERE WAS A HOLE IN THE ENGINE CRANKCASE ADJACENT TO THE #4 CYLINDER. THE ENGINE TEARDOWN REVEALED THAT 2 COUNTERWEIGHT RETENTION RINGS HAD BEEN DISLODGED FROM THEIR NORMALLY INSTALLED POSITIONS. THE EXAMINATION ALSO REVEALED THAT THE RETENTION RINGS WERE INSTALLED WITH THE BEVELLED SIDE OF THE RING OUTBOARD AND THE FLAT SIDE INBOARD. ACCORDING TO THE ENGINE OVERHAUL MANUAL, THE FLAT SIDE OF THE RETENTION RINGS SHOULD BE INSTALLED OUTBOARD. THE REMAINING RETENTION RINGS WERE INSTALLED PROPERLY. HISTORICAL MAINTENANCE INFORMATION ON THE COUNTERWEIGHT WAS NOT RECOVERED.
Flight
Event TypeAccident
Event Time17:43 EST
Nearest Airport0nm N
Runway0
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftCessna 210
Tail NumberN7320E
Aircraft CategoryAir
DamageSubstantial
OperatorHeld Daniel Z
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsContinental · IO-470-E · Reciprocating · 260
Seats4
People & Injuries
Injury SummaryNo injuries (4 uninjured)
Fatal0
Serious0
Minor0
Uninjured4
Total4
Crew 1Age 37 · Third Class
Conditions
ConditionsVMC
LightDaylight
Wind240° @ 10 kt
Visibility10 sm
CeilingNone
Temperature / Dew Point52 / 0 C
Altimeter29.00 inHg
Observation Time22:53
Weather SourceWFAC