MIA87IA141

NTSB incident investigation · Bell 222U · Oxford, MS · April 20, 1987

Incident · No injuriesIncident investigationFinal report
Date
April 20, 1987, 14:00 local (18:00 UTC)
Place
Oxford, MS
Injuries
3 uninjured
Damage
Minor damage
Phase of flight
Enroute
Aircraft
N222HXBell 222U
Weather
Visual (VMC) · Day
Status
Completed · report July 10, 1989
Report
Approved by Office Director
FAA report
19870420058369I
Case key
31794

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the incident.

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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
Turbine assembly,turbine blade - failure,totalCause
Maintenance,design change - improperManufacturerCause
Acft/equip,inadequate designManufacturerCause
Inadequate certification/approval,aircraftFaa(organization)Cause
Acft/equip,inadequate compliance determinationFaa(other/organization)Cause
Inadequate surveillance,inadequate procedureFaa(organization)
In flight collision with terrain/waterLanding - flare/touchdown
Precautionary landing - performed

Analysis

The pilot executed a precautionary landing after hearing a loud bang and experiencing a loss of the number 1 engine. Post accident examination revealed that the power turbine wheel blades had failed, and the wheel parts logjammed and penetrated the engine case. The blade fractures were high cycle transgranular failures eminating from the trailing edge of each blade root. A review of FAA SDR records revealed 87 similar failures. Six emergency airworthiness directives were subsequently issued.

Aircraft

Registration
N222HX
Reported as
Bell 222U
Category
Helicopter
Serial number
47533
Airframe hours
842
Engine
Lycoming LTS-101-75001, 750 horsepower, turbo shaft
Damage
Minor damage
Flight
Part 91
Operator
Memphis Medical Center
Registered owner
Memphis Medical Center
Airworthiness certificate
Standard, Normal
Last inspection
100 hour · January 23, 1987 · 97 hours before
Departed
MEM · Memphis, TN
Destination
Oxford, MS

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
37
Certificates
Flight instructor, Commercial
Airplane ratings
Single-engine land
Instrument ratings
Helicopter
Medical
Class 1, Valid Medical--no waivers/lim.
Seat
Right
Flight hours
3,200 total · 400 in this make and model

Weather

Conditions
Visual (VMC) · Day
Wind
310° at 7 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
91 °F, dew point 57 °F
Altimeter
30.00 inHg
Observed at
MEM, 60 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.