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NTSB Report
November 22, 1991 · Cessna 310R · N35H
South St Paul, MN
Overview
Report Status
Probable Cause
Event Type
Accident
Date
November 22, 1991
Injury Outcomes
No injuries (1 uninjured)
Location
South St Paul, MN
Aircraft
Cessna 310R
Tail Number
N35H
Operator
New Creations
Injuries
None
Aircraft Damage
Substantial
NTSB Number
CHI92LA031
AS THE AIRPLANE CLIMBED THROUGH APPROXIMATELY 100 FEET ABOVE THE GROUND AFTER TAKEOFF, TWO PROPELLER BLADES SEPARATED FROM THE RIGHT ENGINE PROPELLER ASSEMBLY, PENETRATING THE NOSE SECTION OF THE AIRPLANE. THE PILOT SHUT DOWN THE RIGHT ENGINE, FEATHERED THE REMAINING PROPELLER BLADE YAND RETURNED TO LAND AT THE DEPARTURE AIRPORT WITHOUT FURTHER INCIDENT. POST-ACCIDENT EXAMINATION REVEALED THE BLADES FAILED DUE TO METAL FATIGUE. AN ENGINE TEARDOWN AND CRANKSHAFT COUNTERWEIGHT INSPECTION REVEALED NO EVIDENCE OF PRE-IMPACT MALFUNCTION/ANOMALY. THE PROPELLER ASSEMBLY HAD A TOTAL TIME OF ABOUT 3,229 HOURS, INCLUDING APPROXIMATELY 295 HOURS SINCE OVERHAUL AND INSTALLATION ON THE ACCIDENT AIRFRAME.
NTSB Probable Cause
THE INADEQUATE DESIGN OF THE PROPELLER HUB ASSEMBLY WHICH RESULTED IN METAL FATIGUE AND PROPELLER BLADE SEPARATION DURING INITIAL CLIMBOUT.
Full Narrative
AS THE AIRPLANE CLIMBED THROUGH APPROXIMATELY 100 FEET ABOVE THE GROUND AFTER TAKEOFF, TWO PROPELLER BLADES SEPARATED FROM THE RIGHT ENGINE PROPELLER ASSEMBLY, PENETRATING THE NOSE SECTION OF THE AIRPLANE. THE PILOT SHUT DOWN THE RIGHT ENGINE, FEATHERED THE REMAINING PROPELLER BLADE YAND RETURNED TO LAND AT THE DEPARTURE AIRPORT WITHOUT FURTHER INCIDENT. POST-ACCIDENT EXAMINATION REVEALED THE BLADES FAILED DUE TO METAL FATIGUE. AN ENGINE TEARDOWN AND CRANKSHAFT COUNTERWEIGHT INSPECTION REVEALED NO EVIDENCE OF PRE-IMPACT MALFUNCTION/ANOMALY. THE PROPELLER ASSEMBLY HAD A TOTAL TIME OF ABOUT 3,229 HOURS, INCLUDING APPROXIMATELY 295 HOURS SINCE OVERHAUL AND INSTALLATION ON THE ACCIDENT AIRFRAME.
Flight
Event TypeAccident
Event Time05:50 CST
Nearest AirportHolman Field (0nm)
Runway0
Flight Plan FiledIFR
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftCessna 310R
Tail NumberN35H
Aircraft CategoryAir
DamageSubstantial
OperatorNew Creations
Operating RulePart 135
Engines2
Engine TypeReciprocating
Engine DetailsContinental · I0-520-M · Reciprocating · 285
Seats2
People & Injuries
Injury SummaryNo injuries (1 uninjured)
Fatal0
Serious0
Minor0
Uninjured1
Total1
Crew 1Age 22 · Second Class
Conditions
ConditionsVMC
LightBright Night
Wind200° @ 9 kt
Visibility15 sm
CeilingNone
Temperature / Dew Point36 C / 30 C
Altimeter29.00 inHg
Observation Time11:45
Weather SourceWFAC