Juba AN12 at Khartoum on Nov 8th 2007, engine failure, runway excursion, aircraft burned down

Last Update: May 19, 2013 / 21:33:39 GMT/Zulu time

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Incident Facts

Date of incident
Nov 8, 2007

Classification
Report

Cause
Runway excursion

Airline
Jubba Airways

Departure
Khartoum, Sudan

Destination
Juba, Sudan

Aircraft Registration
ST-JUA

Aircraft Type
Antonov An-12

ICAO Type Designator
AN12

A Juba Airways Antonov AN-12, registration ST-JUA performing freight flight JUC-700 from Khartoum to Juba (Sudan) with 4 crew and 11 tons of cargo, was climbing out of Khartoum's runway 18 about 2 minutes into the flight when the crew reported a bird strike into engine #3 (inboard right hand) and decided to return. The aircraft aligned with runway 36 using a teardrop procedure turn. After the aircraft touched down on runway 36 the aircraft veered left off the runway, the right hand wing collided with an electrical mast, the aircraft came to a stop about 700 meters from the point of touchdown just short of a military installation of three stationary tanks and burst into flames. The crew broke the left hand cockpit side window and escaped without injuries, the aircraft burned completely down also seriously damaging the three tanks.

Post flight examination revealed no evidence of a bird strike though the operator continued to claim a bird strike had caused the accident, observers at the runway thresholds 18 and 36 reported no bird activity around the aerodrome at the time of the accident.

Sudan's Central Directorate of Air Accident Investigation (SAAICD) released their final report concluding the probable causes of the accident were:

- Crew panic and misjudgement lead to failure of applying procedures for landing with one-engine inoperative.

- No.3 engine failure

The captain (54, ATPL, 17,000 hours total, 7,000 hours on type) was assisted by a first officer (59, 11,000 hours total, 4,200 hours on type). The aircraft had accumulated 11,787 hours since new and 3,687 hours since last overhaul and was within maintenance schedules.

The weather at departure was winds calm and CAVOK.

Both flight data recorders were recovered following the accident, both had been exposed to fire, but the tapes inside were good. However, neither tape contained data of the accident flight.

The SAAICD analysed that there was no evidence of a bird strike like blood/feather at the engine intake or damage at the first stages of the compressor (editorial note: no further analysis or report of examination results are contained in the report that would explain why the engine failed). The propeller #3 feathered as result of the malfunction.

Following a teardrop procedure the aircraft returned to Khartoum for a landing on runway 36, the approach speed was kept at 280-290 kph (151-156 knots) with flaps at 25 degrees. The aircraft touched down about 1500 meters down the 2980 meters long runway, the aircraft veered vigorously left because symmetric propeller #2 had entered beta range with propeller #3 feathered. This was contrary to standard operating procedures demanding the symmetric engine kept at idle. Brakes were not applied, the commander admitted due to panic, nose wheel steering was not activated. The SAAICD concluded analysis stating that the crew did not execute the landing checklist and did not take sufficient time to assess the situation and make good decisions.

5 safety recommendations were released as result of the investigation.
Incident Facts

Date of incident
Nov 8, 2007

Classification
Report

Cause
Runway excursion

Airline
Jubba Airways

Departure
Khartoum, Sudan

Destination
Juba, Sudan

Aircraft Registration
ST-JUA

Aircraft Type
Antonov An-12

ICAO Type Designator
AN12

This article is published under license from Avherald.com. © of text by Avherald.com.
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