Aviation Crash Map

Aerospatiale AS355F1 N101UC

29 October 1991 · Billings, Montana, United States · No injuries

Summary

On 29 October 1991 at about 02:15 local time, a Aerospatiale AS355F1 registered N101UC, operated by Omni Flight Helicopters, Inc, was involved in an accident near Billings, Montana, United States. 3 people were on board and nobody was injured. The aircraft was substantially damaged. The NTSB has published a probable cause for this accident; it is quoted in full below.

The record

Date
at 02:15
Classification
Accident
Location
Billings, Montana, United States
Coordinates
45.8707, -108.4710
Aircraft
Aerospatiale AS355F1
Registration
N101UC
Category
Helicopter
Engines
2
Operator
Omni Flight Helicopters, Inc
Operating rule
Part 91: General Aviation
Purpose of flight
Unknown
Phase of flight
Not recorded
Route
Billings → Unknown
Aircraft damage
Substantial
Weather
VMC
Light
Night/Dark
NTSB number
SEA92LA029

People

Nobody was injured.

On board Died Serious Minor Uninjured
3 0 0 0 3

Probable cause

THE UNLATCHING AND SUBSEQUENT OPENING INFLIGHT OF THE LEFT-REAR ENGINE COWL DOOR. A FACTOR CONTRIBUTING TO THE ACCIDENT WAS THE FAILURE OF COMPANY MAINTENANCE PERSONNEL TO EXECUTE THE MANUFACTURER'S SERVICE BULLETIN.

Quoted verbatim from the NTSB record. This site does not paraphrase or interpret it.

Read the full NTSB narrative

SHORTLY AFTER THE COMPANY INITIATED ABORT OF THE MEDEVAC FLIGHT, THE FLIGHT CREW OF THE AEROSPATIALE AS355 FELT A SHUDDER WHICH THEY ATTRIBUTED TO GUSTY WIND CONDITIONS. UPON LANDING AT BILLINGS INTERNATIONAL AIRPORT, MONTANA, A PORTION OF THE LEFT-REAR ENGINE COWL DOOR WAS FOUND TO BE SEPARATED, ALONG WITH DAMAGE TO THE MAIN ROTOR BLADES NECESSITATING REPLACEMENT OF THE BLADES. THE CREW HAD PREVIOUSLY NOTIFIED COMPANY PERSONNEL OF THE COWL DOOR LATCH PROBLEM AND HAD PREFLIGHTED THE COWL PRIOR TO THE ACCIDENT FLIGHT. THE MANUFACTURER WAS AWARE OF THE PROBLEM AND HAD ISSUED A RELEVANT SERVICE BULLETIN. THE SERVICE BULLETIN HAD NOT BEEN IMPLEMENTED ON THE ACCIDENT AIRCRAFT.

Quoted verbatim from the NTSB record.

Other Aerospatiale AS355F1 accidents

Date Aircraft Location Operator Outcome Died
8 Oct 2001 Aerospatiale AS355F1
N911BB
Rosebud, Texas, United States - Minor injuries -
11 Jun 2003 Aerospatiale AS355F1
N217ES
Madison, Florida, United States C J Systems Aviation Group Minor injuries -
22 Mar 2008 Aerospatiale AS355F1
N406LH
New York, New York, United States Liberty Helicopters No injuries -

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