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Last updated: 8 December 2021
Statuts:Enquête Officielle
Date:vendredi 21 septembre 2007
Heure:19:52
Type/Sous-type:Silhouette image of generic DH8D model; specific model in this crash may look slightly different
de Havilland Canada DHC-8-402Q Dash 8
Operated by:Augsburg Airways
On behalf of:Lufthansa Regional
Immatriculation: D-ADHA
Numéro de série: 4028
Année de Fabrication: 2000
Heures de vol:13382
Moteurs: 2 Pratt & Whitney Canada PW150A
Equipage:victimes: 0 / à bord: 4
Passagers:victimes: 0 / à bord: 68
Total:victimes: 0 / à bord: 72
Dégats de l'appareil: Substantiels
Conséquences: Repaired
Lieu de l'accident:München-Franz Josef Strauss Airport (MUC) (   Allemagne)
Phase de vol: A l'atterrissage (LDG)
Nature:Transport de Passagers Intern.
Aéroport de départ:München-Franz Josef Strauss Airport (MUC/EDDM), Allemagne
Aéroport de destination:Florence-Peretola Airport (FLR/LIRQ), Italie
Numéro de vol:LH4074
Détails:
A DHC-8-402Q aircraft sustained substantial damage un a nosegear-up landing at München, Germany.
The aircraft, operating Lufthansa Regional flight LH4074 to Florence, Italy, returned to München when the nose landing gear could not be deployed in preparation for landing. Several attempts to recycle the landing gear proved fruitless. New attempts were made near München but these were also unsuccessful. Even the emergency procedure failed.
Finally a nose gear-up landing was carried out on runway 08R. The aircraft came to rest about 465 m after the nose contacted the runway.

Probable Cause:

Conclusions
The immediate causes of the accident were:
- Due to a vibration cracks developed and due to fretting a coil spring in the actuating mechanism for the nose landing gear doors broke.
- The fragments of the coil spring fell into the enclosed wheel well in the vicinity of the strut and jammed itself in the landing gear struts upon retraction of the nose gear.
- The jammed coil spring blocked the locking mechanisms of the nose landing gear in the retracted and locked position.
- The force required for releasing the blocked locking mechanisms could be applied to either the normal or with the emergency system.



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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 München-Franz Josef Strauss Airport et Florence-Peretola Airport est de 504 km (315 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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