Crash-aerien 15 SEP 2012 d'un Learjet 24D D-CMMM - Bornholm-Rønne Airport (RNN)
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Statuts:Accident investigation report completed and information captured
Date:samedi 15 septembre 2012
Heure:13:39
Type/Sous-type:Silhouette image of generic LJ24 model; specific model in this crash may look slightly different
Learjet 24D
Compagnie:BIO Aerospace
Immatriculation: D-CMMM
Numéro de série: 24-328
Année de Fabrication: 1976
Moteurs: 2 General Electric CJ610-6
Equipage:victimes: 0 / à bord: 1
Passagers:victimes: 0 / à bord: 1
Total:victimes: 0 / à bord: 2
Dégats de l'appareil: Substantiels
Conséquences: Written off (damaged beyond repair)
Lieu de l'accident:1 km (0.6 milles) E of Bornholm-Rønne Airport (RNN) (   Danemark)
Phase de vol: En approche (APR)
Nature:Privé
Aéroport de départ:Strausberg Airfield (EDAY), Allemagne
Aéroport de destination:Bornholm-Rønne Airport (RNN/EKRN), Danemark
Détails:
A Learjet 24D corporate jet was severely damaged in an accident near Bornholm-Rønne Airport (RNN), Denmark. The two people on board the aircraft sustained serious injuries. The airplane stalled on finals came down in a corn field just east of runway 29.
Before takeoff from Strausberg Airport, the aircraft was refueled with 200 liters of jet fuel. According to the ATS flight plan, the pilot stated the total endurance to be 01:30 hrs and the Estimated Elapsed Time (EET) to be 00:30 hrs. The pilot informed the accident investigators that the estimated total endurance before takeoff was approximately 01:00 hrs.
The aircraft departed Strausberg at 12:58. At 13:32 hrs and at a distance of 18 nm southwest of Bornholm, the pilot cancelled the IFR flight plan and continued VFR for a visual approach to runway 29.
At 13:37:08 hrs, the pilot reported that the aircraft was turning final for runway 29. The aircraft was cleared to land. The wind conditions were reported to be 280° at 19 knots with a maximum of 29 knots.
On finals both engines flamed out. At 13:39:18 hrs, the pilot three times declared an emergency. The aircraft stalled and impacted terrain in a field of sweet corn with a low forward airspeed and a steep descent.
A preliminary technical investigation revealed that both engines suffered from fuel starvation. Both wing fuel tanks and wingtip tanks were empty. The fuselage tank was drained and contained 160 liters of fuel. The engines were supplied with fuel from the wing tanks only. In order to use the fuel from the fuselage tank, the fuel had to be transferred into the wing tanks. Two valves, a fuel transfer valve and a fuel cross flow valve were found in closed position which was consistent with the position of the fuselage tank switch.

Investigators reported on Danish tv that the person in the right hand seat in the cockpit did have a license needed to be a co-pilot on the jet. The Mexican captain of the jet was charged with fraud and endangerment by Danish police on September 20. He was not in possession of a valid German pilot license.
Also, the German Aviation Authorities informed the AIB DK that the certificate of aircraft registration was cancelled in 2009. The latest valid Airworthiness Certificate was from the 8 th of March 2004 and valid up to the 31st of March 2005.

Probable Cause:

CONCLUSION: "Inadequate en route fuel management resulted in fuel starvation of both engines, while the aircraft was flying at low altitude and the airspeed was decreasing.
The dual engine flame out and the subsequent aircraft speed control led to an unrecoverable stall and consequently caused the accident."

Accident investigation:

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Investigating agency: HCLJ Denmark
Status: Investigation completed
Duration: 96 days (3 months)
Accident number: HCLJ510-2012-155
Download report: Final report

Sources:
» TV2.dk
» SKYbrary 

METAR Weather report:
11:50 UTC / 13:50 local time:
EKRN 151150Z AUTO 28018KT 9999NDV SCT023/// BKN047/// BKN093/// 16/10 Q1008
Wind 280 degrees at 18 knots; Temperature: 16°C, Dewpoint: 10°C, Pressure 1008 mb


Photos

photo of Learjet-24D-D-CMMM
accident date: 15-09-2012
type: Learjet 24D
registration: D-CMMM
photo of Learjet-24D-D-CMMM
accident date: 15-09-2012
type: Learjet 24D
registration: D-CMMM
 

Plan
Ce plan montre l'aéroport de départ ainsi que la supposée destination du vol. La ligne fixe reliant les deux aéroports n'est pas le plan de vol exact.
La distance entre Strausberg Airfield et Bornholm-Rønne Airport est de 280 km (175 miles).
Accident location: Approximate; accuracy within a few kilometers.

Les informations ci-dessus ne représentent pas l'opinion de la 'Flight Safety Foundation' ou de 'Aviation Safety Network' sur les causes de l'accident. Ces informations prélimimaires sont basées sur les faits tel qu'ils sont connus à ce jour.
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