Loss of control Accident de Havilland Canada DHC-6 Twin Otter 300 S9-BAL, Tuesday 23 May 2006
ASN logo
 

Date:Tuesday 23 May 2006
Time:18:38
Type:Silhouette image of generic DHC6 model; specific model in this crash may look slightly different    
de Havilland Canada DHC-6 Twin Otter 300
Owner/operator:Air São Tomé & Principe
Registration: S9-BAL
MSN: 648
Year of manufacture:1979
Engine model:Pratt & Whitney Canada PT6A-27
Fatalities:Fatalities: 4 / Occupants: 4
Other fatalities:0
Aircraft damage: Destroyed, written off
Category:Accident
Location:3 km off São Tomé Island Airport (TMS) -   São Tomé and Príncipe
Phase: En route
Nature:Training
Departure airport:São Tomé Island Airport (TMS/FPST)
Destination airport:São Tomé Island Airport (TMS/FPST)
Investigating agency: CNIPAIA
Confidence Rating: Accident investigation report completed and information captured
Narrative:
The Twin Otter crashed into the Baía Ana Chaves, two miles offshore during a training flight.

Having departed from runway 11 at São Tomé Airport at 18:22 UTC, the first two touch-and-goes were carried out normally. The third manoeuvre began at 18:37 and during the climb phase, the aircraft unexpectedly began an excessively tight turn into the left downwind leg of the approach and at an altitude of approximately 600 feet it crashed into the sea.

CONCLUSION
The Commission of Inquiry has concluded that the causes that contributed to the accident are as follows:
- Excessively tight turn and low altitude for the tailwind
- Late realisation by the crew of the abnormally serious attitude that would be experienced by the aircraft
- Late reaction by the crew to a situation that was already complicated

Accident investigation:
cover
  
Investigating agency: CNIPAIA
Report number: 
Status: Investigation completed
Duration:
Download report: Final report

Sources:

Único avião da Air São Tomé despenhou-se no mar (Jornal de São Tomé e Príncipe, 24-5-2006)

Location

Images:


photo (c) Mauro Cerizzi; Principe Airport (PCP/FPPR); January 2003

Revision history:

Date/timeContributorUpdates
06-Jul-2024 07:08 ASN Updated [Time, Narrative, Accident report]
06-Jul-2024 07:09 ASN Updated

The Aviation Safety Network is an exclusive service provided by:
Quick Links:

CONNECT WITH US: FSF on social media FSF Facebook FSF Twitter FSF Youtube FSF LinkedIn FSF Instagram

©2024 Flight Safety Foundation

1920 Ballenger Av, 4th Fl.
Alexandria, Virginia 22314
www.FlightSafety.org