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Accident
Last updated: 27 August 2016
Status:Definitief
Datum:woensdag 23 juni 1976
Tijd:17:12
Type:Silhouette image of generic DC93 model; specific model in this crash may look slightly different
McDonnell Douglas DC-9-31
Luchtvaartmaatschappij:Allegheny Airlines
Registratie: N994VJ
Constructienummer: 47333/481
Bouwjaar: 1969
Aantal vlieguren:21320
Motoren: 2 Pratt & Whitney JT8D-7A
Bemanning:slachtoffers: 0 / inzittenden: 4
Passagiers:slachtoffers: 0 / inzittenden: 102
Totaal:slachtoffers: 0 / inzittenden: 106
Schade: Afgeschreven
Gevolgen: Written off (damaged beyond repair)
Plaats:Philadelphia International Airport, PA (PHL) (   Verenigde Staten)
Fase: Nadering (APR)
Soort vlucht:Binnenlandse lijnvlucht
Vliegveld van vertrek:Windsor Locks-Bradley International Airport, CT (BDL/KBDL), Verenigde Staten
Vliegveld van aankomst:Philadelphia International Airport, PA (PHL/KPHL), Verenigde Staten
Vluchtnummer: 121
Beschrijving:
Allegheny Airlines Flight 121, a Douglas DC-9-31, suffered a landing accident on the Philadelphia International Airport, Pennsylvania. Of the 106 persons onboard, 86 persons were injured; there were no fatalities.
The captain of Flight 121 had conducted an instrument approach to runway 27R in visual conditions as a thunderstorm passed over the airport in a north-northeasterly direction. When near the threshold the captain initiated a go-around from a low altitude and entered rain of increasing intensity. Shortly thereafter the aircraft was seen descending in a noseup attitude with the landing gear retracted. After striking tail first on a taxiway about 4,000 feet beyond the threshold of runway 27, the aircraft slid about 2,000 feet and stopped. The wreckage came to rest about 6000 feet beyond the threshold and about 350 feet to the right of the centerline of runway 27R.


PROBABLE CAUSE: "The aircraft's encounter with severe horizontal and vertical wind shears near the ground as a result of the captain's continued approach into a clearly marginal severe weather condition. The aircraft's ability to cope under these conditions was borderline when flown according to standard operating procedures; however, if the aircraft's full aerodynamic and power capability had been used, the wind shear could probably have been flown through successfully. Contributing to the accident was the tower controller's failure to provide timely below-minimum RVR information."

Bronnen:
» ICAO Circular 146-AN/96 (148-161)
» NTSB-AAR-78-2

Official accident investigation report
cover
investigating agency: National Transport Safety Bureau (NTSB) - United States of America
report status: Final
report number: NTSB/AAR-78-02
report released:19 January 1978
duration of investigation: 1 year and 7 months
download report: Allegheny Airlines, Inc., Douglas DC-9 N994VJ, Philadelphia, Pennsylvania, June 23, 1976. (NTSB/AAR-78-02)

Veiligheidsmaatregelen

NTSB issued 1 Safety Recommendation

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Foto's

photo of McDonnell Douglas DC-9-31 N994VJ
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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 Windsor Locks-Bradley International Airport, CT en Philadelphia International Airport, PA bedraagt 312 km (195 miles).

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