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Last updated: 4 December 2021
Status:Definitief
Datum:vrijdag 21 september 2007
Tijd:19:52
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
Registratie: D-ADHA
Constructienummer: 4028
Bouwjaar: 2000
Aantal vlieguren:13382
Motoren: 2 Pratt & Whitney Canada PW150A
Bemanning:slachtoffers: 0 / inzittenden: 4
Passagiers:slachtoffers: 0 / inzittenden: 68
Totaal:slachtoffers: 0 / inzittenden: 72
Schade: Groot
Gevolgen: Repaired
Plaats:München-Franz Josef Strauss Airport (MUC) (   Duitsland)
Fase: Landing (LDG)
Soort vlucht:Internationale lijnvlucht
Vliegveld van vertrek:München-Franz Josef Strauss Airport (MUC/EDDM), Duitsland
Vliegveld van aankomst:Florence-Peretola Airport (FLR/LIRQ), Italië
Vluchtnummer:LH4074
Beschrijving:
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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Kaart
Deze kaart geeft het vliegveld van vetrek weer en de geplande bestemming van de vlucht. De lijn tussen de vliegvelden geeft niet de exacte vliegroute weer.
De afstand tussen München-Franz Josef Strauss Airport en Florence-Peretola Airport bedraagt 504 km (315 miles).

This information is not presented as the Flight Safety Foundation or the Aviation Safety Network’s opinion as to the cause of the accident. It is preliminary and is based on the facts as they are known at this time.
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