On September 6-8, 1989, Convair CV-580 LN-PAA experienced a catastrophic loss of control during a charter flight from Oslo-Fornebu (FBU) to Hamburg (HAM). The flight was delayed by nearly an hour due to CAA Norway and catering company issues, culminating in a temporary suspension of the catering company’s credit. Upon settling the financial problem, the crew was granted permission to depart. The flight began normally, progressing to FL220 at 15:59:50. However, the aircraft experienced significant technical problems, specifically a left AC power system malfunction, resulting in a loss of control. The flight was then directed to the APU generator as the primary electrical source, and the aircraft took off at 16:04, cleared direct to AAL VOR/DME (Aalborg). During the flight, strong westerly winds at altitude prompted a 101 heading change to the right. The flight continued normally until 16:24, when the crew was informed by Oslo ACC that radar service was terminated and the flight was directed to Danish-controlled airspace. At 16:23, the aircraft reached its cruising level, and the crew initiated contact with Copenhagen ACC, confirming radar contact. Half a minute later, the crew established contact, and Copenhagen ACC confirmed the flight was maintaining FL220, effectively terminating radio communication. The aircraft then experienced vibrations in the vertical stabilizer, which escalated into violent oscillations and flutter of the horizontal tail surfaces and rudder. This resulted in the loss of vital tail section components, leading to the crew’s loss of control. The aircraft ultimately fell into the sea.On September 6-8, 1989, Convair CV-580 LN-PAA experienced a catastrophic loss of control during a charter flight from Oslo-Fornebu (FBU) to Hamburg (HAM). The flight was delayed by nearly an hour due to CAA Norway and catering company issues, culminating in a temporary suspension of the catering company’s credit. Upon settling the financial problem, the crew was granted permission to depart. The flight began normally, progressing to FL220 at 15:59:50. However, the aircraft experienced significant technical problems, specifically a left AC power system malfunction, resulting in a loss of control. The flight was then directed to the APU generator as the primary electrical source, and the aircraft took off at 16:04, cleared direct to AAL VOR/DME (Aalborg). During the flight, strong westerly winds at altitude prompted a 101 heading change to the right. The flight continued normally until 16:24, when the crew was informed by Oslo ACC that radar service was terminated and the flight was directed to Danish-controlled airspace. At 16:23, the aircraft reached its cruising level, and the crew initiated contact with Copenhagen ACC, confirming radar contact. Half a minute later, the crew established contact, and Copenhagen ACC confirmed the flight was maintaining FL220, effectively terminating radio communication. The aircraft then experienced vibrations in the vertical stabilizer, which escalated into violent oscillations and flutter of the horizontal tail surfaces and rudder. This resulted in the loss of vital tail section components, leading to the crew’s loss of control. The aircraft ultimately fell into the sea.