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ASN Wikibase Occurrence # 25474
Last updated: 26 September 2021
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Date:18-SEP-1976
Time:15:37 UTC
Type:Silhouette image of generic C402 model; specific model in this crash may look slightly different
Cessna 402B
Owner/operator:Geosurvey International
Registration: 5Y-ATM
MSN: 0445
Fatalities:Fatalities: 0 / Occupants: 4
Other fatalities:0
Aircraft damage: Written off (damaged beyond repair)
Category:Accident
Location:2 miles east of Fela Railway Station -   Tanzania
Phase: En route
Nature:Test
Departure airport:Mwanza
Destination airport:Mwanza
Narrative:
The aircraft took off from Mwanza Airport, Tanzania, to carry out a test flight for the purpose of compensating the Magnetometer equipment installed in the aircraft.
On completion of the calibration, the aircraft headed back to Mwanza.
An engineer seated in the front right-hand seat noticed very dense white smoke trailing from the port engine, almost immediately the oil pressure gauge indicated a loss of pressure and the propeller was feathered shortly afterwards; the starboard engine began to lose power and the aircraft was unable to maintain a positive rate of climb, the pilot then elected to carry out a forced landing. On impact, the starboard wing caught fire, after evacuation by the pilot and passengers the fire engulfed the major part of the fuselage and the wings.

Cause
The accident was the result of a combination of events that followed each other in rapid succession in which:-
(i) The port propeller was feathered due to an excessive oil leak and subsequent loss of oil pressure,
(ii) Failure to initially use the full power available from the starboard engine, followed by a loss of turbocharging.
(iii) The aircraft was operating at a low altitude above the ground, the surface of which was undulating and covered with large outcrops of rock.

Sources:

Civil Aircraft Registers of Africa
Air Britain
https://www.tcaa.go.tz/files/documents/final%20report%2023-76%20%20Cessna%20402B%20%205H-ATM%20%20FELA%20RAILWAY%20ST.pdf

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


Revision history:

Date/timeContributorUpdates
27-Sep-2008 01:00 ASN archive Added
19-Jan-2019 10:01 Cobar Updated [Aircraft type, Cn, Source]
21-May-2020 07:00 KagurazakaHanayo Updated [Date, Time, Total fatalities, Total occupants, Other fatalities, Location, Phase, Nature, Departure airport, Destination airport, Source, Damage, Narrative]
21-May-2020 07:03 harro Updated [Narrative, Accident report, ]

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