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Accident
Last updated: 16 October 2017
Status:Schlussbericht
Datum:Freitag 25 Oktober 1968
Zeit:ca 18:10
Flugzeugtyp:Silhouette image of generic F27 model; specific model in this crash may look slightly different
Fairchild FH-227C
Fluggesellschaft:Northeast Airlines
Kennzeichen: N380NE
Werknummer: 517
Baujahr: 1966
Betriebsstunden:3828
Triebwerk: 2 Rolls-Royce Dart 532-7
Besatzung:Todesopfer: 2 / Insassen: 3
Fluggäste:Todesopfer: 30 / Insassen: 39
Gesamt:Todesopfer: 32 / Insassen: 42
Sachschaden: Zerstört
Konsequenzen: Written off (damaged beyond repair)
Unfallort:Moose Mountain, NH (   USA)
Flugphase: Annäherung (APR)
Betriebsart:Inländischer planmäßiger Passagierflug
Flug von:Boston-Logan International Airport, MA (BOS/KBOS), USA
Flug nach:Lebanon Regional Airport, NH (LEB/KLEB), USA
Flugnummer: 946
Unfallbericht:
Northeast Airlines Flight 946 departed Boston 17:42 for a flight to Lebanon, NH and Montpelier, VT. The Fairchild climbed to a cruising altitude of 8000 feet. At 18:08 the crew were cleared for an approach to the Lebanon Airport to cruise at 5,000 feet and report leaving 6,000 feet. At 18:10:45, the controller advised the crew that radar service had been terminated and the flight was cleared to contact the Lebanon Flight Service Station (FSS). One minute later the FSS told the crew that the weather was an estimated ceiling of 2,000 feet overcast; visibility was 10 miles; there were breaks in the overcast; the altimeter setting was 29:55; and the wind was calm.
The flight did not perform the published instrument approach procedure but executed an abbreviated approach by making a right turn from their northwesterly heading and then a left turn back to intercept the inbound radial to the VOR station. The inbound radial was intercepted at approximately 8 to 10 miles northeast of the VOR station where it passed through an altitude of about 4500 feet. The crew began the descent but did not level off at 2,800 feet m.s.l., the minimum altitude inbound to the VOR. During the approach to runway 25 the airplane contacted trees on the cloud-shrouded side of a steep, rocky, heavily wooded mountain 57 feet below the summit at 2,237 feet m.s.l. The aircraft cut a swath trough the trees broke up and caught fire.

Probable Cause:

PROBABLE CAUSE: "The premature initiation of a descent towards the Minimum Descent Altitude, based on navigational instrument indications of an impending station passage in an area of course roughness. The crew was not able to determine accurately its position at this time because they had performed a non standard instrument approach and there were no supplement navigational aids available for their use."

Accident investigation:
cover
Investigating agency: NTSB
Status: Investigation completed
Duration: 1 year and 5 months
Accident number: NTSB/AAR-70-07
Download report: Final report


Sicherheitsempfehlungen
Acting upon an NTSB recommendation, the FAA on Nov.7, 1968 issued an Operations and Maintenance Alert regarding the erratic operation and false reversals of Wilcox 806 VOR receivers. One month later the FAA issued Advisory Circular No. 91-18, regarding course needle oscillations on VHF Omnidirectional Range (VOR) receivers. The Wilcox company also took action to recommending three modifications to the Wilcox 806A receiver to improve the performance of the receiver.

NTSB issued 2 Safety Recommendations

Show all AD's and Safety Recommendations

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Map
This map shows the airport of departure and the intended destination of the flight. The line between the airports does not display the exact flight path.
Distance from Boston-Logan International Airport, MA to Lebanon Regional Airport, NH as the crow flies is 174 km (109 miles).
Accident location: Approximate; accuracy within a few kilometers.

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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Fairchild FH-227

  • 78 built
  • 2nd loss
  • 2nd Fataler Unfall
  • 2nd worst accident (Zu diesem Zeitpunkt)
  • 6th worst accident (Momentan)
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