Accident
Last updated: 23 October 2014
Statuts:Enquête Officielle
Date:dimanche 22 décembre 1996
Heure:18:10
Type/Sous-type:McDonnell Douglas DC-8-63F
Compagnie:Airborne Express
Immatriculation: N827AX
Numéro de série: 45901/293
Année de Fabrication: 1967
Heures de vol:62800
Cycles:24234
Moteurs: 4 Pratt & Whitney JT3D-7 (Q)
Equipage:victimes: 3 / à bord: 3
Passagers:victimes: 3 / à bord: 3
Total:victimes: 6 / à bord: 6
Dégats de l'appareil: Détruit
Conséquences: Written off (damaged beyond repair)
Lieu de l'accident:6,5 km (4.1 milles) W of Narrows, VA (   Etats-Unis d'Amérique) show on map
Phase de vol: En cours de manoeuvre (MNV)
Nature:Test
Aéroport de départ:Greensboro/High Point-Piedmont Triad International Airport, NC (GSO/KGSO), Etats-Unis d'Amérique
Aéroport de destination:Greensboro/High Point-Piedmont Triad International Airport, NC (GSO/KGSO), Etats-Unis d'Amérique
Numéro de vol: 827
Détails:
DC-8 N827AX had received major modifications at Triad International Maintenance Corporation (TIMCO), including a "D" check (major airplane overhaul), modification and standardization of cockpit, avionics and airplane systems, installation of a cargo handling system and engine modifications to achieve Stage III noise level requirements. A partial functional evaluation flight was conducted on December 21, 1996, but was terminated when the airplane developed a hydraulic system anomaly (low fluid quantity indication). Due to maintenance delays the aircraft departed 4 hours and 20 minutes late, at 17:40, the following day. The crew were assigned a block altitude of FL130 to FL150 with an IFR clearance back to Greensboro Airport. The planned flight duration was about 2 hours. The airplane climbed through FL090feet at 17:43 and was level at FL141 at 17:45. At 18:05, after performing several landing gear, hydraulic and engine system checks, the flight engineer told the other flight crew members that the "next thing is our stall series. The evaluation flight profile form required that the flight crew identify and record the speed at which the stick shaker activated and the speed of the stall indication. The crew slowed the aircraft down one knot at a time. At 18:08:09, the sound of rattling was heard on the CVR and, at 18:08:11, the flight engineer said "that’s a stall right there... ain’t no [stick] shaker" (at 145 knots). The crew tried to recover from the stall by selecting maximum power. The nose was brought down to gain speed. Not able to recover from the stall, the aircraft struck mountainous terrain in a 52-degree, left wing low and 26-degree, nose-down attitude about 3,400 feet msl.

PROBABLE CAUSE: " The National Transportation Safety Board determines that the probable causes of this accident were the inappropriate control inputs applied by the flying pilot during a stall recovery attempt, the failure of the non-flying pilot-in-command to recognize, address and correct these inappropriate control inputs, and the failure of Airborne Express to establish a formal, functional evaluation flight program that included adequate program guidelines, requirements and pilot training for performance of these flights.
Contributing to the cause of the accident were the inoperative stick shaker stall warning system and Airborne Express DC-8 flight training simulator's inadequate fidelity in reproducing the airplane's stall characteristics."

Sources:
» Aviation Week & Space Technology 3.3.1997 (41)
» Business & Commercial Aviation Nov. 1997 (98)
» NTSB/AAR-97/05
» After Intentionally Stalling DC-8, Crew Uses Incorrect Recovery Technique, Resulting in Uncontrolled Descent and Collision with Terrain

Official accident investigation report
investigating agency: National Transport Safety Bureau (NTSB) - United States of America
report status: Final
report number: NTSB/AAR-97-05
report released:15-JUL-1997
duration of investigation:205 days (6.8 months)
download report: Uncontrolled Flight into Terrain ABX Air (Airborne Express) Douglas DC-8-63, N827AX Narrows, Virginia December 22, 1996 (NTSB/AAR-97-05)
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Opérations de secours

NTSB issued 7 Safety Recommendations

Show all AD's and Safety Recommendations

Photos

photo of McDonnell Douglas DC-8-63F N929R
N929R was sold to Airborne Express and re-registered N827AX.
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Plan
Ce plan montre l'aéroport de départ ainsi que la supposé destination du vol. La ligne fixe reliant les deux aéroports n'est pas le plan de vol exact.
La distance entre Greensboro/High Point-Piedmont Triad International Airport, NC et Greensboro/High Point-Piedmont Triad International Airport, NC est de NAN km (NAN miles).

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