Statuts: | Accident investigation report completed and information captured |
Date: | dimanche 18 décembre 1977 |
Heure: | 01:38 MST |
Type/Sous-type: | Douglas DC-8-54F |
Compagnie: | United Airlines |
Immatriculation: | N8047U |
Numéro de série: | 45880/275 |
Année de Fabrication: | 1966 |
Moteurs: | 4 Pratt & Whitney JT3D- |
Equipage: | victimes: 3 / Ã bord: 3 |
Passagers: | victimes: 0 / Ã bord: 0 |
Total: | victimes: 3 / Ã bord: 3 |
Dégats de l'appareil: | Perte Totale |
Conséquences: | Written off (damaged beyond repair) |
Lieu de l'accident: | 5 km (3.1 milles) E of Kaysville, UT ( Etats-Unis d'Amérique)
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Phase de vol: | En approche (APR) |
Nature: | Cargo |
Aéroport de départ: | San Francisco International Airport, CA (SFO/KSFO), Etats-Unis d'Amérique |
Aéroport de destination: | Salt Lake City International Airport, UT (SLC/KSLC), Etats-Unis d'Amérique |
Numéro de vol: | UA2860 |
Détails:The aircraft was flying a holding pattern near Salt Lake City because of problems with the electrical system. The flight crew contacted the company maintenance and were absent from the approach control frequency for about 7,5 minutes. During this time the aircraft had entered an area near hazardous terrain. When the crew returned to the approach control frequency, they were told to initiate a left turn were instructed to climb immediately to 8000 feet. The aircraft eventually struck a 7665 feet high mountain at 7200 feet.
Probable Cause:
PROBABLE CAUSE: "The approach controller's issuance and the flight crew's acceptance of an incomplete and ambiguous holding clearance in combination with the flight crew's failure to adhere to prescribed impairment-of-communications procedures and prescribed holding procedures. The controller's and flight crew's actions are attributed to probable habits of imprecise communication and of imprecise adherence to procedures developed through years of exposure to operations in a radar environment. Contributing to the accident was the failure of the aircraft's No.1 electrical system for unknown reasons."
Accident investigation:

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Investigating agency: | NTSB |
Status: | Investigation completed |
Duration: | 221 days (7 months) | Accident number: | NTSB/AAR-78-08 | Download report: | Final report
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Sources:
» NTSB-AAR-78-8
Opérations de secours
NTSB issued 2 Safety Recommendations
Issued: 13-APR-1978 | To: | A-78-21 |
REVIEW THE ADEQUACY OF CURRENT COCKPIT VOICE RECORDER PREFLIGHT TESTING PROCEDURES TO ASSURE SATISFACTORY SYSTEM OPERATION. (Closed - Acceptable Action) |
Issued: 13-APR-1978 | To: | A-78-22 |
REVIEW THE RELIABILITY OF COCKPIT VOICE RECORDER UNITS TO ASSURE THAT THE MEAN TIME BETWEEN FAILURE IS NOT EXCESSIVE. (Closed - Acceptable Action) |
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Photos
accident date:
18-12-1977type: McDonnell Douglas DC-8-54F
registration: N8047U
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 San Francisco International Airport, CA et Salt Lake City International Airport, UT est de 955 km (597 miles).
Accident location: Exact; as reported in the official accident report.
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.