Incident Overview

Date: Tuesday 24 December 2002
Aircraft Type: Fairchild SA227-AC Metro III
Owner/operator: North Flying
Registration Number: OY-BPH
Location: Aberdeen-Dyce Airport (ABZ) – ÿ United Kingdom
Phase of Flight: Initial climb
Status: Destroyed, written off
Casualties: Fatalities: 0 / Occupants: 2
Component Affected: Aircraft Engine (Specifically, the Left Engine)Aircraft Engine (Specifically, the Left Engine)
Category: Accident
On December 24, 2002, Swearingen Metro III OY-BPH was contracted to Ben Air for mail services. During clearance, the aircraft was positioned back to its base in Denmark. The crew cleared for taxi to ‘Whiskey Five’ for runway 16, then transitioned to Aberdeen Tower for takeoff. The pilot initiated a reduced power takeoff roll with flaps at 1/4, resulting in a pitch attitude of approximately 12-15 degrees nose-up. As the aircraft left the ground, the co-pilot detected a right-wing yaw, immediately alerting the captain to an engine failure. The captain responded by rotating the aircraft to a pitch attitude of about 12ø to 15ø nose-up, and then reaching for both power levers to maintain control. The aircraft rolled about 15ø to the right, and the co-pilot reported a loss of control. The captain realized the right engine was failing and attempted to retard the left power lever, but the aircraft struck the ground with the right wing. The investigation revealed that the left engine had a bird strike, with no apparent power loss. The crew’s actions ? retarding the left power, not using full rudder, and not raising the gear ? contributed to the aircraft’s crash. These factors, combined with potential issues with JAR-OPS conversion, led to the aircraft’s crash.On December 24, 2002, Swearingen Metro III OY-BPH was contracted to Ben Air for mail services. During clearance, the aircraft was positioned back to its base in Denmark. The crew cleared for taxi to ‘Whiskey Five’ for runway 16, then transitioned to Aberdeen Tower for takeoff. The pilot initiated a reduced power takeoff roll with flaps at 1/4, resulting in a pitch attitude of approximately 12-15 degrees nose-up. As the aircraft left the ground, the co-pilot detected a right-wing yaw, immediately alerting the captain to an engine failure. The captain responded by rotating the aircraft to a pitch attitude of about 12ø to 15ø nose-up, and then reaching for both power levers to maintain control. The aircraft rolled about 15ø to the right, and the co-pilot reported a loss of control. The captain realized the right engine was failing and attempted to retard the left power lever, but the aircraft struck the ground with the right wing. The investigation revealed that the left engine had a bird strike, with no apparent power loss. The crew’s actions ? retarding the left power, not using full rudder, and not raising the gear ? contributed to the aircraft’s crash. These factors, combined with potential issues with JAR-OPS conversion, led to the aircraft’s crash.

Description

Swearingen Metro III OY-BPH had been contracted to Ben Air for mail services during December 2002. On December 24 the plane was to be positioned back to its base in Denmark. Start clearance was given at 07:36. Then the crew were cleared to taxi to ‘Whiskey Five’ for runway 16. After switching frequencies to Aberdeen Tower they were cleared for takeoff. For the reduced power takeoff roll, with the flaps at 1/4, the power was set by the captain. At VR (100 kts), the co-pilot rotated the aircraft to a pitch attitude of about 12ø to 15ø nose-up. As the aircraft left the ground, the co-pilot detected the aircraft ‘yawing’ to the right; almost immediately, he was also aware of a distinct smell of smoke. He called to the captain that he had an engine failure, called for maximum power and tried to maintain control by corrective aileron and rudder inputs. The captain felt the aircraft roll about 15ø to the right and realised that there was a problem with the right (No. 2) engine. He reached for both power levers and moved them forward. There were no audio or visual warnings associated with the apparent problem. The captain looked at the EGT gauges with the power levers fully forward and noted that the No 2 engine indicated about 600øC EGT, whereas the left (No 1) engine indicated greater than 650øC EGT (the normal maximum) and that its fuel ‘Bypass’ light was on. He retarded the No 1 power lever until the ‘Bypass’ light extinguished and noted the resultant EGT at about 630øC. He did not recall any other abnormal indications on the engine instruments but, later in the investigation, the captain recalled hearing a sound “like a compressor stall from the right engine”. About this time, the co-pilot heard the automatic “Bank Angle” voice activate. As the aircraft continued to turn to the right, the co-pilot called that he “couldn’t control the aircraft”. The captain reached for and pulled No 2 engine ‘Stop and Feather Control’ but, almost immediately, OY-BPH struck the ground initially with the right wing. The aircraft slid along the surface of a field, through a fence and onto a road (Dyce Drive), where it struck a car and came to rest. A fire developed on the right hand side, but the crew managed to get out safely. An investigation disclosed that the left engine had experienced bird strike on takeoff, but with no apparent power loss. An extensive technical examination could not identify any reason for a loss of power on the right engine. It was concluded that three actions led to airplane to crash. First, the captain retarded the left power lever after noticing the ‘Bypass’ light illuminate. This retardation of the power lever was not required, and could have resulted in a lower engine power. Second, the co-pilot did not use full rudder deflection to counter the right bank, and third, the commander did not raise the gear because he did not observe a positive rate of climb. These factors may have combined to reduce the climb capability of the aircraft to zero and, in that situation, the decision to not raise the gear was correct. However, all these factors were influenced by inappropriate crew actions. Although both pilots had flown together before, the lack of adherence to JAR-OPS conversion requirements may have been partly responsible for their actions during the emergency.

Source of Information

http://www.skybrary.aero/index.php/SW4,_vicinity_Aberdeen_UK,_2002_(LOC_HF_FIRE)http://www.skybrary.aero/index.php/SW4,_vicinity_Aberdeen_UK,_2002_(LOC_HF_FIRE)

Primary Cause

Left engine failure with a bird strike, combined with inadequate crew actions during a critical phase of flight.Left engine failure with a bird strike, combined with inadequate crew actions during a critical phase of flight.

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