Scheduled Revenue Flight

En route from Uribe to Bogotá-El Dorado Airport, while cruising by night, the airplane struck the slope of a mountain located in the region of Saliente del Rio Guape. As the aircraft failed to arrive at Bogotá, SAR operations were initiated but eventually suspend few days later as no trace of the aircraft nor the 35 occupants was found. The wreckage was found 35 days later on the slope of Mt Guape, at an altitude of 2,200 meters. The aircraft was destroyed upon impact and all 35 occupants were killed.

Southern Airways Flight 242, a DC-9-31, operated as a scheduled passenger flight from Muscle Shoals, Alabama, to Atlanta, Georgia, with an intermediate stop at Huntsville, Alabama. Flight 242 departed Muscle Shoals at 15:21 and landed at Huntsville about 15:44. About 15:54, Flight 242 departed Huntsville on an instrument flight rules (IFR) flight plan for the Hartsfield-Atlanta International Airport; there were 81 passengers and 4 crew members aboard. The flight's route was direct to the Rome VOR and then a Rome runway 26 profile descent to Atlanta. Its estimated time en route was 25 min and its requested en route altitude was 17,000 ft. At 15:56, the controller told Flight 242 that his radarscope was showing heavy precipitation and that the echos were about 5 nmi ahead of the flight. At 15:57:36, the controller said, "...you're in what appears to be about the heaviest part of it now, what are your flight conditions." Flight 242 replied, "...we're getting a little light turbulence and...I'd say moderate rain." At 15:57:47, the controller acknowledged Flight 242's report and told the flight to contact Memphis Center. The Memphis Center controller advised the flight that a SIGMET was current for the area. He then told Flight 242 to contact Atlanta Center. At 16:03:20, Flight 242 switched to another sector of Atlanta Center, established communications on the new frequency and reported being level at FL170. As the aircraft entered an area of rain, the flight crew began discussing the weather depicted on their radar. Based on information from the airborne radar, the captain initially decided that the storms just west of the Rome VOR were too severe to penetrate. Shortly after his initial assessment of the storm system, the captain decided to penetrate the storm area near the Rome VOR. At 16:06:41 Atlanta Center cleared Flight 242 to descend to and maintain 14,000 ft. Shortly afterwards the aircraft entered an area of heavy hail or rain, which continued for at least one minute. The ingestion of intense rain and hail into the engines caused the rotational speed of both engines to decrease below the engine-driven electrical generator operating speeds, and resulted in normal electrical power interruption for 36 seconds. The flight crew likely advanced one or both thrust levers, restoring its generator to operation and provide normal electrical power. After establishing contact with Atlanta Center again, the flight was told to maintain 15,000 ft. At 16:09:15, Flight 242 reported to Atlanta Center, "Okay...we just got our windshield busted and... we'll try to get it back up to 15, we're 14." After reported that the left engine had flamed out, the flight was cleared to descend to 13,000 ft. Meanwhile both engines' high-pressure compressors began to stall severely due to ingestion of massive quantities of water. The severe compressor stalls produced an overpressure surge which deflected the compressor blades forward in the sixth stage of the low-pressure compressors; these blades clashed against the fifth-stage stator vanes and broke pieces from the blades and vanes. Pieces of blades and stator vanes were then ingested into the high-pressure compressors and damaged them severely. Continued high thrust settings following the severe damage to the high-pressure compressors probably caused severe overheating in the turbine sections of both engines, and the engines ceased to function. Shortly before normal electrical power was again, the flight crew radioed that both engines had failed. Atlanta Center told the crew to contact approach control for vectors to Dobbins Air Force Base. Power was then lost for 2 min 4 sec until the APU-driven generator restored electrical power. After establishing contact with Atlanta Approach Control the flight was told they were 20 miles from Dobbins. As the flight was descending, the captain began to doubt their ability to reach Dobbins. Cartersville was closer at 15 miles, so the controller gave vectors for Cartersville. Unable to make it to Cartersville, the crew began looking for a clear field or highway for an emergency landing. At 16:18:02, Flight 242's last transmission to Approach Control was recorded: "... we're putting it on the highway, we're down to nothing." The aircraft's outboard left wing section first contacted two trees near State Spur Highway 92 south-southwest of the community of New Hope. About 0.8 miles farther north-northeast, the left wing again contacted a tree alongside the highway within the community of New Hope. The left and right wings continued to strike trees and utility poles on both sides of the highway, and 570 ft after striking the first tree in New Hope, the aircraft's left main gear contacted the highway to the left of the centerline. Almost simultaneously, the outer structure of the left wing struck an embankment, and the aircraft veered to the left and off the highway. The aircraft traveled another 1,260 ft before it came to rest. As it traveled, the aircraft struck road signs, utility poles, fences, trees, shrubs, gasoline pumps at a gas station-store, five automobiles, and a truck. Of the 85 persons aboard Flight 242, 62 were killed, 21 were seriously injured, and 1 was slightly injured. Additionally, eight persons on the ground were killed. Within a month of the accident, one of the surviving passengers and one person on the ground both died of their injuries.

On approach to Zhdanov Airport, while descending between the outer marker and the inner marker, the pilot-in-command decided to continue under VFR mode while the SP-50 ILS system was not yet activated. While approaching the inner marker, the three engine airplane entered an area of fog when visual contact was lost. At an insufficient height, the airplane struck a 9-meter high concrete pole with its right wing that was partially torn off. The aircraft caught fire, rolled to the right at an angle of 90° then crashed 420 meters further. The wreckage was found 610 meters short of runway threshold and 140 meters to the right of its extended centerline. Three crew members and five passengers were killed while 20 other occupants were injured. The aircraft was destroyed.

The KLM Boeing 747, registration PH-BUF, took off from Schipol Airport (Amsterdam) at 0900 hours on 27 March 1977, en route to Las Palmas de Gran Canaria. This flight was part of the Charter Series KL4805/4806 Amsterdam-Las Palmas (Canary Islands) - Amsterdam operated by KLM on behalf of the Holland International Travel Group (H.I.N.T.), Rijswijk-Z.H. The Boeing 747 registration N736PA, flight number 1736, left Los Angeles International Airport, California, United States, on 26 March 1977, local date, at 0129Z hours, arriving at John F. Kennedy International Airport at 0617Z hours. After the aeroplane was refuelled and a crew change effected, it took off for Las Palmas de Gran Canaria (Spain) at 0742Z. While the aeroplanes were en route to Las Palmas, a bomb exploded in the airport passenger terminal. On account of this incident and of a warning regarding a possible second bomb, the airport was closed. Therefore, KLM 4805 was diverted to Los Rodeos (Tenerife) Airport, arriving at 1338Z on 27 March 1977. For the same reason, PAA1736 proceeded to the same airport, which was its alternate, landing at 1415. At first the KLM passengers were not allowed to leave the aeroplane, but after about twenty minutes they were all transported to the terminal building by bus. On alighting from the bus, they received cards identifying them as passengers in transit on Flight KL 4805. Later, all the passengers boarded KLM 4805 expect the H.I.N.T. Company guide, who remained in Tenerife. When Las Palmas Airport was opened to traffic once more, the PAA 1736 crew prepared to proceed to Las Palmas, which was the flight's planned destination. When they attempted to taxi on the taxiway leading to runway 12, where they had been parked with four other aeroplanes on account of the congestion caused by the number of flights diverted to Tenerife, they discovered that it was blocked by KLM Boeing 747, Flight 4805, which was located between PAA 1736 and the entrance to the active runway. The first officer and the flight engineer left the aeroplane and measured the clearance left by the KLM aircraft, reaching the conclusion that it was insufficient to allow PAA 1736 to pass by, obliging them to writ until the former had started to taxi. The passengers of PAA 1736 did not leave the aeroplane during the whole time that it remained in the airport. KLM 4805 called the tower at 1656 requesting permission to taxi. It was authorized to do so and at 1658 requested to backtrack on runway 12 for take-off on runway 30. The tower controller first cleared the KLM flight to taxi to the holding position for runway 30 by taxiing down the main runway and leaving it by the (third) taxiway to its left. KLM 4805 acknowledged receipt of this message from the tower, stating that it was at that moment taxiing on the runway, which it would leave by the first taxiway in order to proceed to the approach end of runway 30. The tower controller immediately issued an amended clearance, instructing it to continue to taxi to the end of the runway, where it should proceed to backtrack. The KLM flight confirmed that it had received the message, that it would backtrack, and that it was taxiing down tile main runway. The tower signalled its approval, whereupon KLM 4805 immediately asked the tower again if what they had asked it to do was to turn left on taxiway one. The tower replied in the negative and repeated that it should continue on to the end of the runway and there backtrack. Finally, at 1659, KLM 4805 replied, "O.K., sir." At 1702, the PAA aeroplane called the tower to request confirmation that it should taxi down the runway. The tower controller confirmed this, also adding that they should leave the runway by the third taxiway to their left. At 1703:00, in reply to the tower controller's query to KLM 4805 as to how many runway exits they had passed, the latter confirmed that at that moment they were passing by taxiway C4. The tower controller told KLM 4805, "O.K., at the end of the runway make one eighty and report ready for ATC clearance ." In response to a query from KLM 4805, the tower controller advised both aeroplanes - KLM 4805 and PAA 1736 - that the runway centre line lights were out of service. The controller also reiterated to PAA 1736 that they were to leave the main runway via the third taxiway to their left and that they should report leaving the runway. At the times indicated, the following conversations took place between the tower and the KLM 4805 and PAA 1736 aeroplanes. Times taken from KLM CVR.
1705:44.6 KLM 4805: The KLM four eight zero five is now ready for take-off and we are waiting for our ATC clearance. (1705:50.77).
1705:53.41 Tower: KLM eight seven zero five you are cleared to the Papa Beacon, climb to and maintain flight level nine zero, right turn after take-off, proceed with heading four zero until intercepting the three two five radial from Las Palmas VOR. (1706 :08.09).
1706:09.61 KLM 4805: Ah - Roger, sir, we are cleared to the Papa Beacon, flight level nine zero until intercepting the three two five. We are now (at take-off). (1706:17.79).
1706:18.19 Tower : O.K..... Stand by for take-off, I will call you. (1706: 21.79).
Note: A squeal starts at: 1706:19.39 The squeal ends at: 1706:22.06
1706:21.92 PAA 1736: Clipper one seven three six. (1706 : 23.39).
1706:25.47 Tower: Ah - Papa Alpha one seven three six report the runway clear. (1706: 28.89).
1706:29.59 PAA 1736: O.K., will report when we're clear. (1706:30.69).
1706:31.69 Tower: Thank you.
Subsequently, KLM 4805, which had released its brakes to start take-off run 20 seconds before this communication took place, collided with the PAA aeroplane. The control tower received no further communications from PAA 1736, nor from KLM 4805. There were no eyewitnesses to the collision. All 248 occupants on board the KLM 747 were killed. Among the 396 people on board the Pan Am 747, 335 were killed (among them nine crew members) and 61 others were injured.

The KLM Boeing 747, registration PH-BUF, took off from Schipol Airport (Amsterdam) at 0900 hours on 27 March 1977, en route to Las Palmas de Gran Canaria. This flight was part of the Charter Series KL4805/4806 Amsterdam-Las Palmas (Canary Islands) - Amsterdam operated by KLM on behalf of the Holland International Travel Group (H.I.N.T.), Rijswijk-Z.H. The Boeing 747 registration N736PA, flight number 1736, left Los Angeles International Airport, California, United States, on 26 March 1977, local date, at 0129Z hours, arriving at John F. Kennedy International Airport at 0617Z hours. After the aeroplane was refuelled and a crew change effected, it took off for Las Palmas de Gran Canaria (Spain) at 0742Z. While the aeroplanes were en route to Las Palmas, a bomb exploded in the airport passenger terminal. On account of this incident and of a warning regarding a possible second bomb, the airport was closed. Therefore, KLM 4805 was diverted to Los Rodeos (Tenerife) Airport, arriving at 1338Z on 27 March 1977. For the same reason, PAA1736 proceeded to the same airport, which was its alternate, landing at 1415. At first the KLM passengers were not allowed to leave the aeroplane, but after about twenty minutes they were all transported to the terminal building by bus. On alighting from the bus, they received cards identifying them as passengers in transit on Flight KL 4805. Later, all the passengers boarded KLM 4805 expect the H.I.N.T. Company guide, who remained in Tenerife. When Las Palmas Airport was opened to traffic once more, the PAA 1736 crew prepared to proceed to Las Palmas, which was the flight's planned destination. When they attempted to taxi on the taxiway leading to runway 12, where they had been parked with four other aeroplanes on account of the congestion caused by the number of flights diverted to Tenerife, they discovered that it was blocked by KLM Boeing 747, Flight 4805, which was located between PAA 1736 and the entrance to the active runway. The first officer and the flight engineer left the aeroplane and measured the clearance left by the KLM aircraft, reaching the conclusion that it was insufficient to allow PAA 1736 to pass by, obliging them to writ until the former had started to taxi. The passengers of PAA 1736 did not leave the aeroplane during the whole time that it remained in the airport. KLM 4805 called the tower at 1656 requesting permission to taxi. It was authorized to do so and at 1658 requested to backtrack on runway 12 for take-off on runway 30. The tower controller first cleared the KLM flight to taxi to the holding position for runway 30 by taxiing down the main runway and leaving it by the (third) taxiway to its left. KLM 4805 acknowledged receipt of this message from the tower, stating that it was at that moment taxiing on the runway, which it would leave by the first taxiway in order to proceed to the approach end of runway 30. The tower controller immediately issued an amended clearance, instructing it to continue to taxi to the end of the runway, where it should proceed to backtrack. The KLM flight confirmed that it had received the message, that it would backtrack, and that it was taxiing down tile main runway. The tower signalled its approval, whereupon KLM 4805 immediately asked the tower again if what they had asked it to do was to turn left on taxiway one. The tower replied in the negative and repeated that it should continue on to the end of the runway and there backtrack. Finally, at 1659, KLM 4805 replied, "O.K., sir." At 1702, the PAA aeroplane called the tower to request confirmation that it should taxi down the runway. The tower controller confirmed this, also adding that they should leave the runway by the third taxiway to their left. At 1703:00, in reply to the tower controller's query to KLM 4805 as to how many runway exits they had passed, the latter confirmed that at that moment they were passing by taxiway C4. The tower controller told KLM 4805, "O.K., at the end of the runway make one eighty and report ready for ATC clearance ." In response to a query from KLM 4805, the tower controller advised both aeroplanes - KLM 4805 and PAA 1736 - that the runway centre line lights were out of service. The controller also reiterated to PAA 1736 that they were to leave the main runway via the third taxiway to their left and that they should report leaving the runway. At the times indicated, the following conversations took place between the tower and the KLM 4805 and PAA 1736 aeroplanes. Times taken from KLM CVR.
1705:44.6 KLM 4805: The KLM four eight zero five is now ready for take-off and we are waiting for our ATC clearance. (1705:50.77).
1705:53.41 Tower: KLM eight seven zero five you are cleared to the Papa Beacon, climb to and maintain flight level nine zero, right turn after take-off, proceed with heading four zero until intercepting the three two five radial from Las Palmas VOR. (1706 :08.09).
1706:09.61 KLM 4805: Ah - Roger, sir, we are cleared to the Papa Beacon, flight level nine zero until intercepting the three two five. We are now (at take-off). (1706:17.79).
1706:18.19 Tower : O.K..... Stand by for take-off, I will call you. (1706: 21.79).
Note: A squeal starts at: 1706:19.39 The squeal ends at: 1706:22.06
1706:21.92 PAA 1736: Clipper one seven three six. (1706 : 23.39).
1706:25.47 Tower: Ah - Papa Alpha one seven three six report the runway clear. (1706: 28.89).
1706:29.59 PAA 1736: O.K., will report when we're clear. (1706:30.69).
1706:31.69 Tower: Thank you.
Subsequently, KLM 4805, which had released its brakes to start take-off run 20 seconds before this communication took place, collided with the PAA aeroplane. The control tower received no further communications from PAA 1736, nor from KLM 4805. There were no eyewitnesses to the collision. All 248 occupants on board the KLM 747 were killed. Among the 396 people on board the Pan Am 747, 335 were killed (among them nine crew members) and 61 others were injured.

The single engine airplane departed Ust-Kulom Airport at 1228LT bound for Syktyvkar with seven passengers and a crew of two on board, accompanied by a second Aeroflot AN-2 (CCCP-98382) that left at the same time. En route, weather conditions worsened and both crew lost visual contact with each other. Approaching Syktyvkar, the crew was informed about the deterioration of the weather with a limited visibility of 1,500 - 2,500 meters in snow. Few radios communications issues occurred and while descending at a height of 150 meters and making a right turn, the pilot saw the second AN-2 and made a sharp turn to avoid collision when control was lost. The airplane crashed on the icy Vychegda River, about 13 km from the Syktyvkar main Station. While the aircraft was destroyed, all nine occupants were injured. About four days later, one of the passengers died from his injuries.

On final approach to Brugam Airstrip, the twin engine airplane stalled and crashed on a school building. All nine occupants on board the aircraft were injured while five schoolboy were killed and four others injured.

Shortly after takeoff from Aden-Khormaksar Airport, while climbing, the airplane suffered an engine failure. Pilot lost control of the airplane that stalled and crashed into the sea few km offshore. A passenger was rescued while 19 other occupants were killed.

On final approach to Salluit Airport (Ungava Peninsula) in whiteout conditions, the airplane crashed in the icy Sugluk Inlet few km short of runway. Two crew members and two passengers were killed while six other occupants were seriously injured. The aircraft was destroyed.

While descending to Savoonga, the pilot encountered poor weather conditions when the airplane struck the ground few miles from the airstrip. All three occupants were injured and the aircraft was destroyed. The accident occurred in whiteout conditions (IMC conditions) with a 500 feet ceiling.