If you wish to contribute or participate in the discussions about articles you are invited to join SKYbrary as a registered user


AT73, en-route, Roselawn IN USA, 1994

From SKYbrary Wiki

Revision as of 20:46, 13 October 2010 by Integrator1 (talk | contribs)
On 31 October 1994, an ATR 72 operated by Simmons Airlines, crashed near Roselawn, Indiana, USA, following loss of control due to airframe icing.
Event Details
When October 1994
Actual or Potential
Event Type
Loss of Control, Weather
Day/Night Day
Flight Conditions IMC
Flight Details
Aircraft ATR ATR-72-201
Operator Simmons Airlines
Domicile United States
Type of Flight
Origin Indianapolis International Airport
Intended Destination Chicago/O'Hare International Airport
Take off Commenced Yes
Flight Airborne Yes
Flight Completed No
Flight Phase Manoeuvring
Approx. Roselawn, Newton County, IN
Loading map...

Tag(s) Inadequate Airworthiness Procedures
Tag(s) Environmental Factors,
Extreme Bank,
Extreme Pitch
Tag(s) In Flight Airframe Icing
Safety Net Mitigations
Malfunction of Relevant Safety Net No
GPWS Available but ineffective
Damage or injury Yes
Aircraft damage Hull loss
Non-aircraft damage Yes
Injuries None"None" is not in the list (Few occupants, Many occupants, Most or all occupants) of allowed values for the "Injuries" property.
Fatalities Most or all occupants ()
Causal Factor Group(s)
Group(s) Aircraft Technical
Safety Recommendation(s)
Group(s) Aircraft Operation,
Aircraft Airworthiness,
Air Traffic Management
Investigation Type
Type Independent

Loss of Control - Airframe Icing


On 31 October 1994, an ATR 72 operated by Simmons Airlines, crashed near Roselawn, Indiana, USA, following loss of control due to airframe icing.


This is an extract from the Executive Summary of the official report into the accident published by the National Transportation Safety Board (NTSB) (USA)

“On October 31, 1994, at 1559 Central Standard Time, an Avions de Transport Regional, model 72-212 (ATR 72), registration number N401AM, leased to and operated by Simmons Airlines, Incorporated, and doing business as American Eagle flight 4184, crashed during a rapid descent after an uncommanded roll excursion. The airplane was in a holding pattern and was descending to a newly assigned altitude of 8,000 feet when the initial roll excursion occurred. The airplane was destroyed by impact forces; and the captain, first officer, 2 flight attendants and 64 passengers received fatal injuries. “

The probable cause of the accident was given as:

“The National Transportation Safety Board determines that the probable cause of this accident was the loss of control, attributed to a sudden and unexpected aileron hinge moment reversal, that occurred after a ridge of ice accreted beyond the deice boots while the airplane was in a holding pattern during which it intermittently encountered supercooled cloud and drizzle/rain drops, the size and water content of which exceeded those described in the icing certification envelope. The airplane was susceptible to this loss of control, and the crew was unable to recover.”

Related Articles

Further Reading