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Accident
Last updated: 21 August 2018
Status:Schlussbericht
Datum:Freitag 8 Dezember 2017
Zeit:10:17
Flugzeugtyp:Silhouette image of generic NOMA model; specific model in this crash may look slightly different
GAF Nomad N.22C
Fluggesellschaft:Bayswater Road Ltd.
Kennzeichen: VH-ATO
Werknummer: 108
Baujahr: 1979
Betriebsstunden:11053
Triebwerk: 2 Allison 250-B17C
Besatzung:Todesopfer: 0 / Insassen: 1
Fluggäste:Todesopfer: 0 / Insassen: 0
Gesamt:Todesopfer: 0 / Insassen: 1
Sachschaden: Schwer beschädigt
Unfallort:Buka Airport (BUA) (   Papua Neuguinea)
Flugphase: Landung (LDG)
Betriebsart:Kontrollflug
Flug von:Buka Airport (BUA/AYBK), Papua Neuguinea
Flug nach:Buka Airport (BUA/AYBK), Papua Neuguinea
Unfallbericht:
The GAF Nomad aircraft, registered VH-ATO, owned and operated by Bayswater Road Ltd, departed Buka Airport, conducting an aerial survey under VFR. The pilot-in-command was the sole occupant.
The pilot reported that when doing the pre-landing checks the landing gear failed to extend. He attempted to deploy the landing gear using the emergency system (which consists in a manual pump), but the handle of the manual pump broke after three to four pumps. The pilot decided to perform a landing in the grassy flight strip, which was about 32 metres to the right of the sealed runway centerline.
There was significant damage to both landing-gear pods and the nose forward of the nose locker. The landing gear doors had significant skin damage and were not aligned with the pods. The nose cone was punctured and torn on the underside. The lower attachment points of both wings’ struts came into contact with the landing-gear pods and fracturing the pods side skins. The trailing skin on the left lower strut was bent.

Probable Cause:

AIC comment:
The landing gear system was examined including the electrical wiring. The wire to the up-lock switch on the right land gear had fractured and separated, rendering the normal landing gear extension system inoperative.
Excessive force due to the resistance of the locked-up landing gear extension motor during the pumping to extend the gear manually, likely contributed to the overload failure of the handle.

Accident investigation:
cover
Investigating agency: AIC PNG
Status: Investigation ongoing
Duration: 146 days (5 months)
Accident number: AIC 17-1003
Download report:


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photo of GAF Nomad N.22C VH-ATO
photo of GAF Nomad N.22C VH-ATO
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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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