Incident Overview

Date: Tuesday 10 December 1985
Aircraft Type: Douglas C-47A-1-DK (DC-3)
Owner/operator: South African Air Force – SAAF
Registration Number: 6888
Location: near Swartkop Air Force Base – ÿ South Africa
Phase of Flight: En route
Status: Substantial, repaired
Casualties: Fatalities: 0 / Occupants:
Component Affected: C-47A ‘6888’ (msn 12107) and C-47A ‘6874’ (with damage to the leading edge).C-47A ‘6888’ (msn 12107) and C-47A ‘6874’ (with damage to the leading edge).
Category: Accident
On December 10, 1985, a formation practice involving 12 SAAF Douglas C-47 transport planes from 44 Sqn was conducted to celebrate the type’s 50th Anniversary. The aircraft executed a streamer take-off, forming into three sections of four aircraft. During this practice, a sudden jolt and vibration were experienced on the control column, leading to a right bank and damage to the right wing of C-47A ‘6888’ (msn 12107). C-47A ‘6874’ experienced minor damage to the leading edge of ‘6888’ and had contact with the leading edge of ‘6888’, resulting in a serious damage to the aileron. Both aircraft landed safely.On December 10, 1985, a formation practice involving 12 SAAF Douglas C-47 transport planes from 44 Sqn was conducted to celebrate the type’s 50th Anniversary. The aircraft executed a streamer take-off, forming into three sections of four aircraft. During this practice, a sudden jolt and vibration were experienced on the control column, leading to a right bank and damage to the right wing of C-47A ‘6888’ (msn 12107). C-47A ‘6874’ experienced minor damage to the leading edge of ‘6888’ and had contact with the leading edge of ‘6888’, resulting in a serious damage to the aileron. Both aircraft landed safely.

Description

On 10 December 1985 a total of 12 SAAF Douglas C-47 transport planes from 44 Sqn were detailed to do a formation practice for the upcoming flypast celebrating the type’s 50th Anniversary. The 12 aircraft did a streamer take off and then formed into three sections of four aircraft. C-47A “6888” (msn 12107) was the lead aircraft and the number 3 to the lead section. The aircraft turned left after take off in order to position 100 meters behind the lead section. Whilst waiting for the other aircraft to move in, a sudden jolt was felt on the control column together with a high frequency vibration, the right wing then dropped and the aircraft went into a right bank. The no.1 engine of C-47 “6874” had made contact with the leading edge of “6888” and had seriously damaged the aileron. “687” had very minor damage with a few cowling panels being damaged. Both aircraft landed safely.

Primary Cause

Sudden jolt and vibration during the formation practice, likely caused by a mechanical failure or instability in the aircraft’s control system.Sudden jolt and vibration during the formation practice, likely caused by a mechanical failure or instability in the aircraft’s control system.

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