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Last updated: 26 October 2021
Statuts:Enquête Officielle
Date:dimanche 7 novembre 1999
Heure:14:55
Type/Sous-type:Silhouette image of generic F100 model; specific model in this crash may look slightly different
Fokker 100
Opérant pour:Air Dolomiti
Loué à :Alpi Eagles
Immatriculation: I-ALPL
Numéro de série: 11250
Année de Fabrication: 1988-03-28 (11 years 8 months)
Heures de vol:24429
Cycles:22880
Moteurs: 2 Rolls-Royce Tay 620-15
Equipage:victimes: 0 / à bord: 5
Passagers:victimes: 0 / à bord: 39
Total:victimes: 0 / à bord: 44
Dégats de l'appareil: Substantiels
Conséquences: Repaired
Lieu de l'accident:Barcelona Airport (BCN) (   Espagne)
Phase de vol: A l'atterrissage (LDG)
Nature:Transport de Passagers Intern.
Aéroport de départ:Venice-Marco Polo Airport (VCE/LIPZ), Italie
Aéroport de destination:Barcelona-El Prat Airport (BCN/LEBL), Espagne
Numéro de vol:2708
Détails:
A Fokker 100, operated by Alpi Eagles on behalf of Air Dolomiti, suffered a runway excursion accident on landing at Barcelona Airport (BCN), Spain.
Flight DLA2708 had departed Venice, Italy with 39 passengers and a crew of five. The flight was uneventful and the weather at Barcelona was fine. Wind was calm, there was no cloud ceiling and visibility was more than 10 kilometres.
The co-pilot was acting as the flying pilot, maintaining a speed of some 140-145 kt, some 9-14 knots above the reference speed. The landing configuration was set with 25° of flap. In the approach to runway 25 the flight was conducted manually.
The aircraft’s wheels touched down at a point some 300 m from the threshold of runway 25 at a ground speed of 128 kt.
After nosewheel touchdown, with the aircraft now rolling along the runway, it experienced an increasing vibration which was felt both by the pilots and by the flight attendants and passengers.
The captain took control of the aircraft when he felt the vibrations. The lift dumpers opened in the normal manner. The aircraft was zigzagging, with a tendency to pull to the right, and the pilot used the brakes and applied idling reverse to attempt to brake and keep the aircraft on the runway; he increased the power asymmetrically, up to 1.18 EPR in the left-hand engine and 1.13 in the right.
The right-hand main landing gear then collapsed. The two wheels, together with the sliding member of the right-hand main landing gear leg, sheared off and struck the fairing of the right-hand engine. The wing leant on that side, scraping the right-hand flap, wingtip and aileron along the ground. In the wing, the MLG Bracket split. However, the fuel tanks remained intact.
The aircraft finally came to a halt at the side of the runway, outside the tarmac paved surface, in a grassy area 1,730 m from the threshold of the runway and 100 m to the right of the centre line or axis of the runway. The right wing was resting on the ground. There was no fire.

Probable Cause:

Causes:
1. The aircraft suffered the accident due to the breakage of the main fitting of the RH-MLG.
2. The cause of the failure of the main fitting was exposure to mechanical loads, greater than the loads this part was designed for. The loads were due to a shimmy vibration
3. The vibration became unstable due to a functional failure of the shimmy damper.
4. The low damping capacity of the shimmy damper was due to the excessive thickness of a pack of shims between the housing and the cap which form the sleeve of the damper.
5. The defective assembly was not detected in a mandatory flow test on a hydraulic bench.
6. The existence of the shims themselves could have contributed to the assembly defect; it has been demonstrated that they have no functionality in the design.
7. Another possible contribution to the deficient operation of the damper could have been low tightening torque in the bolts connecting the two sleeves forming the damper housing.
8. A possible contributing factor to the shimmy phenomenon initiation could have been the gentle touchdown made by the aircraft combined with a high coefficient of friction corresponding to the dry runway.

Accident investigation:
cover
Investigating agency: CIAIAC
Status: Investigation completed
Accident number: A-068/1999
Download report: Final report

METAR Weather report:
13:30 UTC / 14:30 local time:
1330 LEBL 25004KT 190V250 CAVOK 20/06 Q1017 NOSIG

14:00 UTC / 15:00 local time:
1400 LEBL 25006KT CAVOK 19/04 Q1017 NOSIG


Opérations de secours

CIAIAC issued 2 Safety Recommendations

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Photos

photo of Fokker-100-I-ALPL
accident date: 07-11-1999
type: Fokker 100
registration: I-ALPL
photo of Fokker-100-I-ALPL
accident date: 07-11-1999
type: Fokker 100
registration: I-ALPL
 

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 Venice-Marco Polo Airport et Barcelona-El Prat Airport est de 945 km (591 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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