Crash-aerien 24 DEC 1968 d'un Convair CV-580 N5802 - Bradford Airport, PA (BFD)
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Statuts:Accident investigation report completed and information captured
Date:mardi 24 dcembre 1968
Heure:20:12
Type/Sous-type:Silhouette image of generic CVLT model; specific model in this crash may look slightly different
Convair CV-580
Compagnie:Allegheny Airlines
Immatriculation: N5802
Numéro de série: 410
Année de Fabrication: 1957
Heures de vol:29173
Moteurs: 2 Allison 501-D13
Equipage:victimes: 3 / à bord: 6
Passagers:victimes: 17 / à bord: 41
Total:victimes: 20 / à bord: 47
Dégats de l'appareil: Détruit
Conséquences: Written off (damaged beyond repair)
Lieu de l'accident:4 km (2.5 milles) SE of Bradford Airport, PA (BFD) (   Etats-Unis d'Amérique)
Phase de vol: En approche (APR)
Nature:Transport de Passagers Nat.
Aéroport de départ:Erie International Airport, PA (ERI/KERI), Etats-Unis d'Amérique
Aéroport de destination:Bradford Airport, PA (BFD/KBFD), Etats-Unis d'Amérique
Numéro de vol: 736
Détails:
Allegheny Airlines Flight 736 departed Detroit, MI for a flight to Washington, DC with intermediate stops at Erie, Bradford and Harrisburg, PA. The Convair CV-580 took off from Erie at 19:46.
At 20:06 Flight 736 reported over the VOR outbound at the beginning of the instrument approach procedure. Erie Approach Control then told the crew to contact the Braford Flight Service Station (FSS). At 20:08 the flight reported that they were doing the procedure turn inbound for runway 32 and Bradford FSS told them wind was 290 degrees at 15 knots. The Convair descended in light snow showers until the aircraft contacted trees along terrain which had an average upslope of 1.5 degrees some 4 km short of the runway. The airplane cut a swath through the trees and impacted the ground at a point 800 feet from the initial tree contact. The fuselage came to rest inverted.

Probable Cause:

PROBABLE CAUSE: "The continuation of the descent from the final approach fix through the Minimum Descent Altitude and into obstructing terrain at a time when both flight crewmembers were looking outside the aircraft in an attempt to establish visual reference to the ground. Contributing factors were the minimal visual references available at night on the approaches to the Bradford Regional Airport; a small but critical navigational error during the later stages of the approach; and a rapid change in visibility conditions that was not known to the crew."

Accident investigation:

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Investigating agency: NTSB
Status: Investigation completed
Duration: 1 year and 1 months
Accident number: NTSB/AAR-70-04
Download report: Final report

Sources:
» ICAO Accident Digest Circular 107-AN/81 (303-328)


Opérations de secours
On January 17, 1969 13 safety recommendations were issued to the FAA regarding approach and landing accidents in poor weather conditions. The NTSB a.o. recommended expediting development and installation of audible and visible altitude warning devices and the implementation of procedures for their use. The FAA replied that a rule became effective on September 28, 1968, which will require by February 28, 1971, both visual and aural altitude alerting signals to warn pilots of jet aircraft when approaching selected altitudes during climbs, descents, and instrument approaches.
The FAA also reported that an Instrument Landing System (ILS) was installed at the Bradford Regional Airport in the fall of 1969.

NTSB issued 2 Safety Recommendations

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Photos

photo of Convair-CV-580-N5802
 

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 Erie International Airport, PA et Bradford Airport, PA est de 130 km (81 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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Convair CV-580

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