Event Details

Title:Severe icing, Serious incident occurring January 28, 2000 near Berlin-Tegel, involving an Aerospatiale-Alenia ATR 42-300
Micro summary:This ATR 42-300 entered an area of extreme icing.
Event Time:2000-01-28 at 1547 CET
File Name:2000-01-28-DE.pdf
Publishing Agency:Federal Bureau of Aircraft Accidents Investigation (BFU)
Publishing Country:Germany
Report number:EX001-0/00
Site of event:Climb
Departure:Tegel International Airport, Berlin, Germany
Destination:Bremen Airport, Bremen, Germany
Airplane Type(s):ATR 42-300
Flight Phase:Climb
Type of flight:Revenue
Serious Injuries:0
Other Injuries:0
Executive Summary:The aeroplane had departed at 15:47 hrs 1 from Berlin-Tegel for a scheduled flight to Bremen under instrument flight rules (IFR). 3 crew members and 42 passengers were aboard the aeroplane.

The pilot-in-command (PIC) was the pilot flying (PF). The aeroplane was flown manually. During the initial climb to the cleared flight level (FL) 130 the aeroplane entered instrument meteorological conditions (IMC) in appr. 3000 ft. Shortly afterwards the aeroplane ice evidence probe indicated icing.

The anti-icing equipment as well as the airframe deicing equipment were switched on and were functioning normally.

The crew had preselected the climb out speed to 160 kt and the rate of climb was 800 to 1000 ft/min. Later on, after the icing of the aeroplane had been determined, the climb-out speed was increased by 10 kt.

From FL 60 the crew noticed freezing rain and ice accumulation on the wing leading edges and the propeller spinners.

The rate of climb was gradually decreasing. Both powerplants had maximum climb torque (Climb). At FL 80, the accumulation of ice had increased to such a degree that the aeroplane was no longer capable of continuing the climb.

The crew assumed that the aeroplane had got into an area of severe icing.

The crew informed ATC about the severe ice accumulation on the aeroplane and requested a clearance for an immediate descent.

At first a clearance to descend to FL 60 and later on to 4000 ft and 3500 ft (QNH) was granted. Even at this altitude the aeroplane was still in the zone of icing. Thus the crew was forced to further continue the descent. Only at an altitude of 2000 ft (QNH) the aeroplane was clear of clouds and under visual meteorological conditions (VMC) as well as in a positive temperature range so that no further icing occurred.

After 5 to 10 minutes of flight in 2000 ft (QNH), the ice had separated from the aeroplane. The crew decided to continue the flight to the scheduled airport of arrival.

The aeroplane climbed to FL 100 and at 16:45 hrs it landed at Bremen airport without further problems.

The incident was due to the fact that the aeroplane had entered atmospheric conditions of severe icing for which it was not certificated.

Application of the AFM procedures implemented for such encounter, allowed the flight crew to exit these severe icing conditions and to continue a safe flight and landing.
Learning Keywords:Operations - Icing
Other - Certification
Close match:Control problems in icing, Serious incident occurring 14 December 1998, 15 km westlich Cottbus, to Aerospatiale-Alenia/ATR 42-300
Wing icing on a Boeing 737-500, LN-BRX, on December 12, 2002
In-Flight Icing Encounter And Uncontrolled Collision With Terrain, Comair Flight 3272, Embraer EMB-120RT, N265CA, Monroe, Michigan January 9, 1997
In-Flight Icing Encounter and Loss of Control, Simmons Airlines, d.b.a. American Eagle Flight 4184, Avions de Transport Regional (ATR) Model 72-212, N401AM, Roselawn, Indiana, October 31, 1994
In-Flight Icing Encounter and Loss of Control, Simmons Airlines, d.b.a. American Eagle Flight 4184, Avions de Transport Regional (ATR) Model 72-212, N401AM, Roselawn, Indiana, October 31, 1994, PART II
Loss of control on takeoff, Ryan International Airlines DC-9-15, N565PC, Cleveland-Hopkins International Airport, Cleveland, Ohio, February 17, 1991
Flight control system problems following icing, Avro 146-RJ100 and others, G-JEAV, January 17, 2006
Roll Oscillations on Landing, two Air Canada Airbus 321-s211, C-GJVX and C-GIUF, Toronto/Lester B. Pearson International Airport, Ontario, 07 December 2002


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