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Last updated: 19 January 2019
Statuts:Enquête Officielle
Date:lundi 10 novembre 2008
Heure:07:56
Type/Sous-type:Silhouette image of generic B738 model; specific model in this crash may look slightly different
Boeing 737-8AS (WL)
Compagnie:Ryanair
Immatriculation: EI-DYG
Numéro de série: 33639/2557
Année de Fabrication: 2008-03-17 (8 months)
Heures de vol:2419
Cycles:1498
Moteurs: 2 CFMI CFM56-7B26/3
Equipage:victimes: 0 / à bord: 8
Passagers:victimes: 0 / à bord: 164
Total:victimes: 0 / à bord: 172
Dégats de l'appareil: Substantiels
Conséquences: Written off (damaged beyond repair)
Lieu de l'accident:Roma-Ciampino Airport (CIA) (   Italie)
Phase de vol: A l'atterrissage (LDG)
Nature:Transport de Passagers Intern.
Aéroport de départ:Frankfurt-Hahn Airport (HHN/EDFH), Allemagne
Aéroport de destination:Roma-Ciampino Airport (CIA/LIRA), Italie
Numéro de vol:FR4102
Détails:
Ryanair flight 4102, a Boeing 737-800, departed Hahn Airport, Germany, at 06:30 for a flight to Rome-Ciampino Airport, Italy.
The first officer was the Pilot Flying on the leg whilst the captain was the Pilot Monitoring.
The flight was uneventful until the approach phase at the destination airport. The aircraft established the first radio contact with Ciampino Tower, communicating that it was 9 NM from the runway and stabilised on the ILS for runway 15.
The aircraft, authorized and configured for the approach, was proceeding for landing, when, at a height of 136 ft and a distance of about 300 m from the runway, the captain noticed birds on the flight trajectory. He stated "Ahi", repeated in rapid sequence. At a distance of about 100 m from the runway, the TO/GA pushbutton was activated. The first officer acknowledged: "Go around, flaps 15", setting the go around attitude. At the same time as the TO/GA was activated, the aircaft collided with a thick flock of some 86 starlings. A loud bang was heard and both engines stalled. The aircraft climbed to 173 feet and then continued to lose height, despite the nose-up command.
There was a progressive speed reduction and an increase of the angle of attack until the activation of the stick shaker, which was recorded at 21 feet. The aircraft hit the ground in aerodynamic stall conditions, near taxiway AC, about half way along the total length of the runway at a vertical acceleration of 2.66g.
First contact with the runway occurred with the main landing gear properly extended and with the lower part of the fuselage tail section. The left main landing gear detached from its attachment during the landing run and the lower part of the left engine nacelle came into contact with the runway. The aircraft stopped near the threshold of runway 33.
The fire brigade sprayed extinguishing foam around the area where the engine nacelle had come into contact with the runway. The captain then arranged for the disembarkation of the passengers and crew using a ladder truck from the right front door, with the addition of the right rear slide, later activated and used.

Probable Cause:

CAUSES
The accident has been caused by an unexpected loss of both engines thrust as a consequence of a massive bird strike, during the go-around manoeuvre.
The loss of thrust has prevented the aircrew from performing a successful go around and has led the aircraft to an unstabilized runway contact.
The following factors have contributed to the event:
- the inadequate effectiveness of bird control and dispersal measures put in place by the airport operator at the time of the accident;
- the captain decision to perform a go around, when the aircraft was at approximately 7 seconds from touchdown. The above decision was significantly influenced by:
1. the lack of instructions to flight crew concerning the most suitable procedures to adopt in the case of single or multiple bird strikes in the landing phase;
2. the absence of specific training in the management, by the flight crew, of the "surprise" and "startle" effects in critical phases of the flight.

Accident investigation:
Investigating agency: ANSV
Status: Investigation completed
Duration: 10 years and 1 months
Accident number: Final report
Download report: Final report

Sources:
» Ryanair press release
» ANSV


Opérations de secours

ANSV issued 2 Safety Recommendations

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Photos

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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 Frankfurt-Hahn Airport et Roma-Ciampino Airport est de 988 km (617 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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