British Aircraft Corporation Flight 53
| British Aircraft Corporation Flight 53 | |
|---|---|
 Identical aircraft from the British Aircraft Corporation |
|
| Accident summary | |
| Accident type | Loss of control through deep stall |
| place | 2 km north-northwest of Chicklade , Wiltshire , United Kingdom |
| date | October 22, 1963 |
| Fatalities | 7th |
| Survivors | 0 |
| Aircraft | |
| Aircraft type | BAC 1-11-200 AB |
| operator | British Aircraft Corporation |
| Mark | G-ASHG |
| Departure airport | Wisley Airport |
| Destination airport | Wisley Airport |
| Passengers | 0 |
| crew | 7th |
| Lists of aviation accidents | |
On October 22, 1963, a BAC 1-11 crashed on British Aircraft Corporation Flight 53 near Chicklade , Wiltshire , carried out by its manufacturer for test purposes , killing all seven occupants.
plane
The aircraft was a BAC 1-11-200 AB about two months old with the aircraft registration G-ASHG.
crew
The crew consisted of the pilot MJ Lithgow, the first officer R. Rymer, the two observers GL Poultar and DJ Clarke, as well as the chief observer RAF Wright, the designer CJ Webb and the aerodynamicist B. J Prior.
course
The aircraft took off from Wisley Airport at 10:17 a.m. on a test flight. The control and stability properties were checked in the event of an impending stall and its diversion under different center of gravity. The aircraft rose to 17,000 ft (5180 m ) and four stall tests were performed with the landing gear and flaps retracted. In the fifth test, the flaps were extended to 8 degrees to test the properties of the aircraft at altitudes between 15,000 and 16,000 feet (4,570 m-4,880 m). This time, however, it came to the Deep Stall , which is practically inevitable. The plane was sinking at about 180 ft (55 m) per second, the pilots pressed the elevators for the time being , but the plane did not respond. Then Captain Lithgow tried to bring the aircraft into a side glide flight and set the thrust levers to maximum thrust. The pilots failed to intercept the aircraft. Ninety seconds after entering the Deep Stall, 23 minutes after take-off, the plane struck 2 km north-northwest of Chicklade , Wiltshire and exploded. It had slid only 70 ft (21 m) further on the ground with very little horizontal movement. All 7 inmates died.
root cause
The cause of the accident was a deep stall , in which the horizontal stabilizer loses its effect and the stall without additional aids such as a special anti-spin parachute is practically unausleitbar. However, the aircraft was not equipped with such a parachute.
aftermath
As a result of the crash, 1-11 stick shakers and stick pushers were installed in the BAC to prevent this effect.
Similar cases
- In the aircraft accident involving the Hawker Siddeley Trident G-ARPY , a Hawker Siddeley Trident crashed under similar circumstances.
- On Bombardier Aerospace Flight 388 , a Bombardier CRJ-100 crashed under similar circumstances.
swell
- Flight accident data and report G-ASHG in the Aviation Safety Network (English)
- Excerpt from a book about misfortune
- Description of the accident with a picture of the crash site
- Description of BAC 1-11 and mention of the accident
- Newspaper article about the crash 1
- Newspaper article about the crash 2
- Image of the memorial stone for the accident on which the names of the victims are written
- globalsecurity.org
- dc-9.com
Coordinates: 51 ° 7 '35 " N , 2 ° 7' 30.2" W.