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Last updated: 4 December 2021
Statuts:Enquête Officielle
Date:jeudi 21 janvier 2010
Type/Sous-type:Silhouette image of generic B744 model; specific model in this crash may look slightly different
Boeing 747-4R7F
Immatriculation: LX-OCV
Numéro de série: 29731/1222
Année de Fabrication: 1999
Heures de vol:55967
Moteurs: 4 Rolls-Royce RB211-524H2
Equipage:victimes: 0 / à bord: 2
Passagers:victimes: 0 / à bord: 1
Total:victimes: 0 / à bord: 3
Dégats de l'appareil: Mineurs
Conséquences: Repaired
Lieu de l'accident:Luxembourg-Findel Airport (LUX) (   Luxembourg)
Phase de vol: A l'atterrissage (LDG)
Aéroport de départ:Barcelona-El Prat Airport (BCN/LEBL), Espagne
Aéroport de destination:Luxembourg-Findel Airport (LUX/ELLX), Luxembourg
Numéro de vol: 793
The aircraft was operating a scheduled freight flight from Barcelona, Spain to Luxembourg. The aircraft's actual departure time in Barcelona was 11:13 local time. At 12:40, flight CLX 793 contacted Luxembourg Approach (APP) for the first time and was advised by the approach controller that Low Visibility Procedures (LVP) were in operation.
Fog prevailed at Luxembourg airport with a cloud base at 100 feet overcast and a visibility of 100 meters, temperature and dew point were at 1°C.
The aircraft was cleared for an ILS approach on runway 24 at 12:49. RVR readings were 350/275/375 meters. At 12:50:55, CLX 793 reported established on the localiser for runway 24 and was transferred to Tower. RVR readings had decreased to 350/250/350 meters.
CLX 793 contacted Luxembourg Tower (TWR) at 12:51:40 and reported established on the ILS 24. The Tower Controller then cleared them to land.
At 12:53:46, reaching decision height at 17 ft, the Pilot Flying called out 'landing’. During the flare, the airplane impacted a maintenance van 'ELE 23' positioned slightly to the right of the centreline of runway 24 and about 340 meters from the threshold, with the front-end pointing into the opposite direction (060°). The roofline of the van was at a height of 2.54 m (8 ft). The right hand body landing gear of the Boeing 747-400F impacted the roof of ELE 23 with tire no. 12 slightly below the roofline of the van on a backward sloped roof section and rolled over it, damaging the roof on the whole length of the vehicle. The van's lightbar, as well as its R/T antennas, were ripped off on impact. The maintenance crew working on the centreline lights outside of ELE 23 ran off the side of the runway as soon as they noticed an increasing noise from a landing aircraft.
The aircraft landed safely at 12:53:51.
After touchdown, at 12:53:59, the Pilot Flying mentioned to the Pilot Monitoring (PM) that there was a car in the touchdown zone. The PM, monitoring the instruments during landing in accordance
with company procedures, didn't notice it.
The aircraft vacated runway 24 at taxiway Echo and at 12:56:28, while taxiing to apron P7, the PF informed the Tower controller about a car in the touchdown zone. The controller asked if there was a problem and the PF denied. The aircraft continued to the parking position on apron P7 without further incident.

Probable Cause:

Causal and contributory factors:
- The impaired operational readiness of the ELE department due to a manning shortcoming, combined with the lack of provisions to appoint external workforce if necessary, prevented ANA to schedule preventive maintenance work outside of normal operating hours (i.e. during the curfew);
- The decision to carry out preventive maintenance work in low visibility conditions without hampering air traffic gave priority to flight operations over safety aspects;
- The lack of adequate co-ordination between aerodrome control tower and ELE department with regard to the preventive maintenance work contributed to a reduced situational and organizational awareness of the TWR control staff;
- Inadequate procedures for the access of vehicles to the RWY and ILS sensitive area during LVP contributed to the development of an unsafe condition;
- Read-back procedures were not adequately applied by aerodrome control tower on ground control frequency, making this procedural safety net ineffective;
- Low visibility weather conditions, associated with the lack of supplementary ground traffic control and surveillance equipment, limited the capability of aerodrome control tower to identify and correct a developing unsafe condition;
- The use of different frequencies for air traffic and ground traffic on the manoeuvring area reduced the situational awareness of ELE 23 maintenance crew working on the RWY, preventing them to take avoiding action.

Accident investigation:
Investigating agency: ATI
Status: Investigation completed
Duration: 2 years and 11 months
Accident number: AET-2012/AC-01
Download report: Final report


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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 Barcelona-El Prat Airport et Luxembourg-Findel Airport est de 974 km (608 miles).

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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