CHI92LA031

NTSB accident investigation · Cessna 310R · South St Paul, MN · November 22, 1991

Accident · No injuriesLimited investigationFinal report
Date
November 22, 1991, 05:50 local (11:50 UTC)
Place
South St Paul, MN
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Initial climb
Aircraft
N35HCessna 310R
Weather
Visual (VMC) · Night/bright
Status
Completed · report May 5, 1993
Report
Approved by Office Director
FAA report
19911122053409A
Case key
15349

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

The inadequate design of the propeller hub assembly which resulted in metal fatigue and propeller blade separation during initial climbout.

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.

Airframe/component/system failure/malfunctionTakeoff - initial climb
Propeller system/accessories,hub - fatigue
Acft/equip,inadequate designManufacturerCause
Propeller system/accessories,hub - failure,total
Propeller system/accessories,blade - separation

Analysis

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.

Aircraft

Registration
N35H
Reported as
Cessna 310R
Category
Airplane
Serial number
310R0953
Engine
Continental I0-520-M, 285 horsepower, reciprocating
Damage
Substantial damage
Flight
Part 135
Operator
New Creations, Inc
Registered owner
F&V Aircraft Leasing Co.
Airworthiness certificate
Standard, Normal
Last inspection
AAIP · January 2, 2000
Destination
DSM · Des Moines, IA
Flight plan
IFR
Airport
STP · Holman Field

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
22
Certificates
Flight instructor, Commercial
Airplane ratings
Single-engine land, Multi-engine land
Instrument ratings
Airplane
Medical
Class 2, Valid Medical--w/ waivers/lim
Seat
Left
Flight hours
3,337 total · 1,145 in this make and model · 3,266 as pilot in command · 185 in the last 90 days · 116 in the last 30 days · 4 in the last 24 hours

Weather

Conditions
Visual (VMC) · Night/bright
Wind
200° at 9 knots
Visibility
15 statute miles
Lowest ceiling
None
Temperature
36 °F, dew point 30 °F
Altimeter
29.00 inHg
Observed at
STP, 1 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.