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Last updated: 23 October 2021
Status:Schlussbericht
Datum:Dienstag 31 August 1948
Zeit:12:06 UTC
Flugzeugtyp:Silhouette image of generic DC3 model; specific model in this crash may look slightly different
Douglas C-47A-10-DK (DC-3)
Fluggesellschaft:Sabena
Kennzeichen: OO-CBL
Werknummer: 12420
Baujahr: 1944
Betriebsstunden:3040
Triebwerk: 2 Pratt & Whitney R-1830-S1C3-G
Besatzung:Todesopfer: 3 / Insassen: 3
Fluggäste:Todesopfer: 10 / Insassen: 10
Gesamt:Todesopfer: 13 / Insassen: 13
Sachschaden: Zerstört
Konsequenzen: Written off (damaged beyond repair)
Unfallort:nahe Kimbwe (   Kongo/Kinshasa)
Flugphase: Während des Fluges (ENR)
Betriebsart:Inländischer planmäßiger Passagierflug
Flug von:Manono Airport (MNO/FZRA), Kongo/Kinshasa
Flug nach:Elizabethville Airport (FBM/FZQA), Kongo/Kinshasa
Unfallbericht:
The C-47 passenger plane impacted terrain and broke up near Kimbwe. The airplane was en route to Elizabethville (now Lubumbashi).

Probable Cause:

CONCLUSIONS (translated from French):
From the examination of the debris the orientation and trajectory of the various components of the aircraft before impact can be established more or less likely, but it has not been possible to determine the actual cause us to the events due to the almost complete destruction of the airplane.
We are therefore reduced to make assumptions.
Some can be removed with a near certainty:
a.- fire in flight
b.- in flight loss of an essential element of the for the stability of the aircraft like wing, stabilizer, etc.
c.- airframe vibration which might have come from a faulty weight balance.

All control surfaces were identified on site with their weight balance. None carries traces of damage. Note that, in Service Bulletin No. 207 Section I, DOUGLAS states:
"It is emphasized that the DOUGLAS COMPANY has experienced no trouble in the past with the Control surfaces nor have any been reported either to us or to the Civil Aeronautics Administration."
Certain assumptions can not be ruled out:
a.- Pilot incapacitation (natural or accidental: bird through the windshield, explosion of a cylinder, etc., etc.)
b.- Dry tornado.
The weather at the alleged time of the accident was:
- Haze
- Calm air, little cloudy
- Average visibility.
According to the crews who flew over the site of the accident during search the region was know for violent updrafts.
The Territorial Administration Kipushi (30 Km. SW Elisabethville) confirmed that the day of the accident at 15.00 local time a dry tornado removed the roof of a house.
c.- failure autopilot suddenly putting the aircraft into a dangerous position before the pilot could disconnect it.
Several DC.3 airplane accidents in the USA have been attributed to autopilots.
At the airline T.W.A. the Sperry A-3 autopilot was removed from the DC.3 aircraft. Several other companies have done the same.
From this point of view, these are the most characteristic failures:
a. Seizing of the "Air Relay".
b. Seizure of the "Balancing Oil Valve"
c. Operating stop of the "following-up cable":
- Cable detached
- Pulley stuck
- Rupture of the cable return spring.
d.- Failure or wedging of an essential control element or permanent deformation of the airfrane after a local failure
This is an assumption that we can not report, although nothing positive can confirm it.

Informationsquelle:
» Rapport relative à l'accident survenu à l'avion C-47A, avec immatriculation OO-CBL à KIMBWE le 31 AOÛT 1948.


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Map
This map shows the airport of departure and the intended destination of the flight. The line between the airports does not display the exact flight path.
Distance from Manono Airport to Elizabethville Airport as the crow flies is 477 km (298 miles).
Accident location: Exact; as reported in the official accident report.

This information is not presented as the Flight Safety Foundation or the Aviation Safety Network’s opinion as to the cause of the accident. It is preliminary and is based on the facts as they are known at this time.
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Douglas DC-3

  • ca 13.000 built
  • 2660th loss
  • 879th Fataler Unfall
  • 180th worst accident (Zu diesem Zeitpunkt)
  • 407th worst accident (Momentan)
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 Kongo/Kinshasa
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  • 29th worst accident (Momentan)
» safety profile