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ASN Wikibase Occurrence # 248934
Last updated: 3 June 2021
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Date:16-FEB-2020
Time:15:54 LT
Type:Silhouette image of generic A139 model; specific model in this crash may look slightly different
AgustaWestland AW139
Owner/operator:Sapporo City Fire Department Air Corp
Registration: JA17AR
MSN: 41519
Fatalities:Fatalities: 0 / Occupants:
Other fatalities:0
Aircraft damage: None
Category:Serious incident
Location:Ishikari City, Hokkaido -   Japan
Phase: Manoeuvring (airshow, firefighting, ag.ops.)
Nature:Ambulance
Departure airport:Ishikari City, Hokkaido
Destination airport:Ishikari City, Hokkaido
Investigating agency: JTSB
Narrative:
Hoist weights (10 lbs) fell from aircraft at 180 ft during hoist training.

PROBABLE CAUSES
The JTSB concludes that the probable cause of this serious incident was the weight hook was almost certainly not properly closed when attached on the hoist hook, and at the timing weights with the hoist hook were released outside of the Rotorcraft, the hook opened and weights dropped.

Sources:

http://aerossurance.com/helicopters/sar-dropped-object
https://www.mlit.go.jp/jtsb/eng-air_report/JA17AR.pdf

Accident investigation:
cover
  
Investigating agency: JTSB
Status: Investigation completed
Duration: 1 year 1 month
Download report: Final report

Media:


Revision history:

Date/timeContributorUpdates
20-Mar-2021 13:51 Aerossurance Added
21-Mar-2021 09:57 Aerossurance Updated [Embed code]
06-Apr-2021 17:38 harro Updated [Embed code, Narrative, Accident report]

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