Scottish Aviation Twin Pioneer | Bureau of Aircraft Accidents Archives

While completing a training mission, the airplane suffered a dual engine failure and crashed in a field located 6,4 km west of Paloh. All three crew members were injured while the aircraft was destroyed.

Probable cause:

Double engine failure in flight.

Crash of a Scottish Twin Pioneer 2 in Plaridel

Date & Time: Jan 12, 1960

Type of aircraft:

Scottish Aviation Twin Pioneer

Operator:

Registration:

PI-C430

Flight Phase:

Landing (descent or approach)

Flight Type:

Training

Survivors:

Yes

Site:

Airport (less than 10 km from airport)

Schedule:

Plaridel - Plaridel

MSN:

562

YOM:

1959

Location:

Country:

Region:

Crew on board:

Crew fatalities:

Pax on board:

Pax fatalities:

Other fatalities:

Total fatalities:

Circumstances:

On touchdown, the airplane went out of control, veered off runway and came to rest. All three crew members who were conducting a local training flight were injured and the aircraft was irreparable.

Crash of a Scottish Twin Pioneer in Luabo

Date & Time: Dec 12, 1959

Type of aircraft:

Scottish Aviation Twin Pioneer

Operator:

Registration:

G-AOEN

Flight Phase:

Flight Type:

Survivors:

Site:

Schedule:

Luabo - Luabo

MSN:

502

YOM:

1956

Location:

Country:

Region:

Crew on board:

Crew fatalities:

Pax on board:

Pax fatalities:

Other fatalities:

Total fatalities:

Circumstances:

The Scottish Aviation Twin Pioneer was on a sales demonstration flight in Africa. A flight out of Luabo was made with a takeoff weight within 100 kg of the maximum permitted. The aircraft had climbed to 700 feet when the no. 1 prop was feathered. When over the Zambesi River, the plane began to lose height. The aircraft continued to lose height even with the no. 2 engine at maximum continuous power, so attempts were made to restart the no. 1 engine at 300 feet. These attempts were unsuccessful and a forced landing was carried out on an island in the river. Following impact, the Twin Pioneer slid for approximately 75 yards on soft ground and the main gear and both wings became detached.
Source:
https://aviation-safety.net/database/record.php?id=19591212-1

Probable cause:

Overloaded.

Crash of a Scottish Twin Pioneer CC.1 in Ipoh: 2 killed

Date & Time: Oct 23, 1959

Type of aircraft:

Scottish Aviation Twin Pioneer

Operator:

Registration:

XG561

Flight Phase:

Takeoff (climb)

Flight Type:

Training

Survivors:

Site:

Airport (less than 10 km from airport)

Schedule:

Ipoh - Ipoh

Location:

Country:

Region:

Crew on board:

Crew fatalities:

Pax on board:

Pax fatalities:

Other fatalities:

Total fatalities:

Circumstances:

The crew was involved in a local training mission on behalf of the 209th Squadron. Shortly after liftoff, while climbing, the pilot-in-command made a sharp turn to the left. The tower controller told the pilot about the presence of a telegraph pole and the pilot was able to avoid the pole but not the electrical cables. The airplane stalled and crashed in a huge explosion, killing both pilots.

Probable cause:

Apparently to avoid a low pressure area approaching the airport, the pilot decided to turn to the left after takeoff instead to the right as in the published departure procedures.

Crash of a Scottish Twin Pioneer CC.1 off Aden

Date & Time: Apr 8, 1959

Type of aircraft:

Scottish Aviation Twin Pioneer

Operator:

Registration:

XM288

Flight Phase:

Landing (descent or approach)

Flight Type:

Training

Survivors:

Yes

Site:

Lake, Sea, Ocean, River

Schedule:

Aden - Aden

MSN:

542

YOM:

1958

Location:

Country:

Region:

Crew on board:

Crew fatalities:

Pax on board:

Pax fatalities:

Other fatalities:

Total fatalities:

Circumstances:

On final approach to Aden-Khormaksar Airport, while completing a local training flight, the airplane stalled and crashed into the sea some 800 meters short of runway threshold. All five crew members were injured and evacuated while the aircraft was lost.

Probable cause:

Double engine failure on approach. Fuel contamination is suspected.

Crash of a Scottish Twin Pioneer CC.1 near Aden

Date & Time: Apr 8, 1959

Type of aircraft:

Scottish Aviation Twin Pioneer

Operator:

Registration:

XM287

Flight Phase:

Flight Type:

Survivors:

Site:

Schedule:

Aden - Aden

MSN:

541

YOM:

Location:

Country:

Region:

Crew on board:

Crew fatalities:

Pax on board:

Pax fatalities:

Other fatalities:

Total fatalities:

Circumstances:

The crew was performing a training mission out from Aden-Khormaksar Airport. En route, a double engine failure forced the crew to attempt an emergency landing when the aircraft crashed and came to rest upside down. All five occupants were slightly injured while the aircraft was damaged beyond repair.

Probable cause:

Double engine failure in flight. Fuel contamination is suspected.

Crash of a Scottish Twin Pioneer 1 in Fezzan: 6 killed

Date & Time: Dec 7, 1957

Type of aircraft:

Scottish Aviation Twin Pioneer

Operator:

Registration:

G-AOEO

Flight Phase:

Flight

Flight Type:

Demonstration

Survivors:

Site:

Desert

Schedule:

Wadi al Ashtan – Tripoli

MSN:

503

YOM:

1956

Location:

Country:

Region:

Crew on board:

Crew fatalities:

Pax on board:

Pax fatalities:

Other fatalities:

Total fatalities:

Aircraft flight hours:

564

Circumstances:

On 7 December the aircraft flew down to Fezzan from Idris Airport to the Esso (Petroleum Ltd.) camp at Wadi al Atshan - a flight of some 400 miles. From Atshan it made one local flight of 45 minutes duration. The aircraft was then refuelled at Atshan and set off at 1427LT for the return journey to Idris Airport where it was expected to arrive at 1800LT with 2 crew and 4 passengers aboard. When the aircraft failed to arrive, a series of radio checks were carried out followed by a widespread air and surface search. The wreckage was sighted the next day. The aircraft was destroyed by impact forces and all six occupants have been killed.

Probable cause:

The accident Was the result of the failure in fatigue of the forward tube of the "V brace" structure in the outer panel of the port wing. This failure led to the breaking away of the outer panel of the port wing from the aircraft in flight. The aircraft was then rendered completely uncontrollable and dived vertically to the ground.

Final Report:

Crash of a Scottish Twin Pioneer 1 off Yapen Islands: 2 killed

Date & Time: Aug 30, 1957 at 1008 LT

Type of aircraft:

Scottish Aviation Twin Pioneer

Operator:

Registration:

JZ-PPX

Flight Phase:

Flight

Flight Type:

Training

Survivors:

Site:

Lake, Sea, Ocean, River

Schedule:

Biak - Biak

MSN:

509

YOM:

1957

Location:

Yapen Islands

Special Region of Papua

Country:

Indonesia

Region:

Asia

Crew on board:

Crew fatalities:

Pax on board:

Pax fatalities:

Other fatalities:

Total fatalities:

Circumstances:

The crew departed Biak-Mokmer Airport at 0930LT for a local training flight. After he completed several touch and go, the captain requested the permission to modify the training program to perform other maneuvers. While performing a turn to the right off the Yapen coast, the airplane lost its right wing and crashed into the sea 13 km offshore and sank. The aircraft was lost and both pilots were killed.

Probable cause:

The Commission is of the opinion that, on the ground of the available evidence of the accident with the Twin Pioneer G-AOEO, the accident with the JZ-PPX has to be put down with to certainty nearing probability to the failure of the V-brace strut due to fatigue, because both aeroplanes were equipped with the same type of liftstrut and V-brace construction and because both aeroplanes were used in the same manner. The JZ-PPX carried out many instruction flights at a low altitude, many take-offs and landings, many manoeuvres with high flight loads, possibly up to the maximum loads. The G-AOEO also carried out many demonstration flights at a low altitude with man take-offs and landings, many manoeuvres, also with possibly maximum loads. The term of life of the V-brace as declared by the manufacturer, was based on conditions of flight which are not in agreement with the reality. During a meeting at September 6, 1957, Mr MacCallum of Scottish Aviation Ltd. gave a value of 4000hrs which raised a discussion. The Commission is aware of the fact that he cannot give a positive opinion upon the cause of the accident because there are no silent witnesses present, but nevertheless is of the opinion that there is a close conformity with the accident of the G-AOEO.