|Title:||Engine failure, Aircraft incident at Kajaani airport, Finland 1. October 1996|
|Micro summary:||This McDonnell Douglas MD-83 experienced engine abnormalies during takeoff, resulting in an RTO.|
|Publishing Agency:||Finland Accident Investigation Board (AIB)|
|Report number:||B 11/1996 L|
|Site of event:||Cruise|
|Departure:||Kajaani Airport, Kajaani, Finland|
|Destination:||Dalaman Airport, Dalaman, Turkey|
|Airplane Type(s):||McDonnell Douglas DC-9-83 (MD-83)|
|Operator(s):||Turkish lntersun Sunways Havacilik A.S.|
|Type of flight:||Revenue|
|Executive Summary:||On Monday September 30, 1996 an aircraft left engine damage took place during flight SWW 2721 from Dalaman, Turkey to Cologne/Bonn, Germany with a Douglas DC-9-83 (MD-83) aircraft, registered TC-INC, owned by Irish Aerospace Finance Ltd and operated by Turkish Intersun Sunways Havacilic A.S. A loud bang was heard in the cockpit from the left engine two to three minutes after reaching the cruising flight level. The engine continued to run but with increased Exhaus Gas Temperature (EGT), high pressure compressor rotation speed (N2) and fuel flow. The aircraft landed in Cologne/Bonn as planned. There were 129 passengers and seven crew members on board. No qualified trouble shooting was performed in Cologne/Bonn and flight SWW 2722 departed for Kajaani, Finland with seven crew members on board but without passengers as planned. In the beginning of the takeoff the difference between the left and the right engine acceleration rates to 1,4 Engine Pressure Ratio (EPR) had increased significantly compared to the previous takeoff in Dalaman with the left engine being slower. During the flight to Kajaani the left engine surged when thrust was reduced from climb to cruise first at Flight Level (FL) 350 and later on at FL 330. |
The serviceability of the left engine was not assured in Kajaani. A total of 137 passengers boarded the aircraft and the crew prepared for the flight SWW 2042 to Dalaman. The aircraft taxied out to the runway and the cockpit crew performed the normal procedures prior to takeoff. A loud banging noise was heard in the aircraft and at the terminal building when thrust was increased and the aircraft made a 180o turn into takeoff position. When the throttles were advanced for takeoff, the left engine did not accelerate normally. The left engine EGT was fluctuating with high peaks and the loud banging noise was heard again. The cockpit crew waited for approximately 40 s for the left engine to accelerate. When the engine did not accelerate, takeoff was aborted.
3.2 Probable cause
- The knowledge and skills of the cockpit crew were insufficient and their attitudes were unprofessional in the handling of the engine malfunction. This was manifested most clearly when the pilots refused to perform the left engine test run in Kajaani according to given instructions and attempted to depart without first determining the serviceability of the left engine.
- The flight operations management of Intersun Sunways A.S. failed to ensure the competency of the cockpit crews.
- The DGCA, Turkey failed to properly oversee the operations of Intersun Sunways A.S. as a new start-up charter operator.
|Learning Keywords:||Operations - Bang, pop, crack, sizzle!|
|Operations - Rejected Takeoff before V1|
|Systems - Engine - Compressor surge/stall|
|Systems - Engine - Contained Engine Failure|
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