Accident
Last updated: 23 October 2014
Status:Definitief
Datum:dinsdag 24 december 1968
Tijd:20:12
Type:Convair CV-580
Luchtvaartmaatschappij:Allegheny Airlines
Registratie: N5802
Constructienummer: 410
Bouwjaar: 1957
Aantal vlieguren:29173
Motoren: 2 Allison 501-D13
Bemanning:slachtoffers: 3 / inzittenden: 6
Passagiers:slachtoffers: 17 / inzittenden: 41
Totaal:slachtoffers: 20 / inzittenden: 47
Schade: Afgeschreven
Gevolgen: Written off (damaged beyond repair)
Plaats:4 km (2.5 mijl) SE of Bradford Airport, PA (BFD) (   Verenigde Staten) show on map
Fase: Nadering (APR)
Soort vlucht:Binnenlandse lijnvlucht
Vliegveld van vertrek:Erie International Airport, PA (ERI/KERI), Verenigde Staten
Vliegveld van aankomst:Bradford Airport, PA (BFD/KBFD), Verenigde Staten
Vluchtnummer: 736
Beschrijving:
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 20:08:47 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 1.5deg some 2,5nm 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: "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."

Bronnen:
» ICAO Accident Digest Circular 107-AN/81 (303-328)
» WCAA 2nd ed. / C.Y. Kimura

Official accident investigation report
investigating agency: National Transport Safety Bureau (NTSB) - United States of America
report status: Final
report number: NTSB/AAR-70-04
report released:28-JAN-1970
duration of investigation:400 days (1 year 1.2 months)
download report: Allegheny Airlines, Inc., Convair 580, near the Bradford Regional Airport, December 24, 1968. (NTSB/AAR-70-04)
cover

Veiligheidsmaatregelen
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 developnent and installaition 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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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 Erie International Airport, PA en Bradford Airport, PA bedraagt 130 km (81 miles).

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Convair CV-580

  • 4e ongeval
  • 182 built
  • 2e zwaarste ongeval (toen het plaatsvond)
  • 5e zwaarste ongeval (op dit moment)
safety profile

 Verenigde Staten
  • 111e zwaarste ongeval (toen het plaatsvond)
  • 169e zwaarste ongeval (op dit moment)
»safety profile