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Last updated: 12 May 2021
Statuts:Enquête Officielle
Date:vendredi 19 juin 1981
Heure:20:15
Type/Sous-type:Silhouette image of generic H25A model; specific model in this crash may look slightly different
Hawker Siddeley HS-125-1A
Compagnie:Flight Management Inc.
Immatriculation: N6SS
Numéro de série: 25100
Année de Fabrication:
Heures de vol:4594
Moteurs: 2 Rolls-Royce Viper 522
Equipage:victimes: 0 / à bord: 2
Passagers:victimes: 0 / à bord: 4
Total:victimes: 0 / à bord: 6
Dégats de l'appareil: Substantiels
Conséquences: Repaired
Lieu de l'accident:80 km (50 milles) NW of Narsarsuaq (   Groënland)
Phase de vol: En vol (ENR)
Nature:Inconnu
Aéroport de départ:Reykjavík Domestic Airport (RKV/BIRK), Islande
Aéroport de destination:Narsarsuaq Airport (UAK/BGBW), Groënland
Détails:
The HS-125 corporate jet operated on a round trip from Denver, Colorado, USA to France. The return flight landed at Malaga, Spain, at Luton, Great Britain and Edinburgh, Scotland before continuing to Reykjavik, Iceland. The next leg was from Reykjavik to
Narsarsuaq, Greenland.
From Iceland to Greenland the crew initially employed VHF navigation followed by "dead reckoning". The crew estimated a fix prior to Greenland 62N 40W and was at that time receiving OZN (Prins Christians Sund). From the calculations on the flightlog and the ground features depicted on the radar scope the crew believed that they were at the planned position.
When tuning in the last NDB enroute crew encountered problems in getting station identification. After what the crew thought was a station passage, descend to lower altitude was initiated. The crew now encountered navigational problems, as the NDB still could not be identified, nor could the crew get a signal making the radio compass track on the ADF. The crew initiated a climb and tried to tune in other ADF's and locators with negative result. Finally a broadcasting station was tuned in with positive result but before landing was assured the aircraft ran out of fuel and a wheels up forced landing was made on the icecap.

Probable Cause:

CONCLUSIONS:
1. The crew and the aircraft was properly certified
2. The Loop amplifier in the navigational system was malfunctioning i.e. a signal ten times stronger than normal was required.
3. The ADF sense antenna installation was not in agreement with specifications.
4. Relying on the ADF system and not employing other navigational means sufficiently the crew became lost.

Sources:
» Aircraft Accident Report 7/82


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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 Reykjavík Domestic Airport et Narsarsuaq Airport est de 1227 km (767 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.
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