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Accident
Last updated: 22 October 2017
Status:Definitief
Datum:vrijdag 23 juni 1967
Tijd:14:47
Type:Silhouette image of generic BA11 model; specific model in this crash may look slightly different
BAC One-Eleven 204AF
Luchtvaartmaatschappij:Mohawk Airlines
Registratie: N1116J
Constructienummer: 098
Bouwjaar: 1966
Aantal vlieguren:2246
Motoren: 2 Rolls-Royce Spey 506-14
Bemanning:slachtoffers: 4 / inzittenden: 4
Passagiers:slachtoffers: 30 / inzittenden: 30
Totaal:slachtoffers: 34 / inzittenden: 34
Schade: Vernield
Gevolgen: Written off (damaged beyond repair)
Plaats:1,6 km (1 mijl) E of Blossburg, PA (   Verenigde Staten)
Fase: Kruisvlucht (ENR)
Soort vlucht:Binnenlandse lijnvlucht
Vliegveld van vertrek:Elmira Regional Airport, NY (ELM/KELM), Verenigde Staten
Vliegveld van aankomst:Washington-National Airport, DC (DCA/KDCA), Verenigde Staten
Vluchtnummer: 40
Beschrijving:
Mohawk Flight 40 took off from Elmira at 14:39 EDT for a flight to Washington, DC. At 14:44 the aircraft was cleared to climb to FL160. Eyewitnesses observed the aircraft a little later near Blossburg when large sections of the tail separated from the aircraft in flight, after which fire and smoke emitted from the tail as the aircraft dove into the ground.

Probable Cause:

PROBABLE CAUSE: "The loss of integrity of empennage pitch control systems due to a destructive in-flight fire which originated in the airframe plenum chamber, fueled by hydraulic fluid, progressed up into the vertical tail fin. The fire resulted from engine bleed air flowing back through the malfunctioning nonreturn valve and an open air delivery valve, through the auxiliary power unit in a reverse direction, and exiting into the plenum chamber at temperatures sufficiently high to cause the acoustics linings to ignite."

Accident investigation:
cover
Investigating agency: NTSB
Status: Investigation completed
Duration: 300 days (10 months)
Accident number: NTSB File No.1-0004
Download report: Final report


Veiligheidsmaatregelen

FAA issued 1 Airworthiness Directive
NTSB issued 3 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 Elmira Regional Airport, NY en Washington-National Airport, DC bedraagt 365 km (228 miles).
Accident location: Exact; as reported in the official accident report.

This information is not presented as the Flight Safety Foundation or the Aviation Safety Network’s opinion as to the cause of the accident. It is preliminary and is based on the facts as they are known at this time.
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BAC One-Eleven

  • 245 built
  • 4e ongeval
  • 3e dodelijk ongeval
  • 2e zwaarste ongeval (toen het plaatsvond)
  • 5e zwaarste ongeval (op dit moment)
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