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ASN Wikibase Occurrence # 207133
Last updated: 15 December 2018
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Date:06-MAR-2018
Time:18:48 LT
Type:Silhouette image of generic H47 model; specific model in this crash may look slightly different
Boeing CH-47J Chinook
Owner/operator:Japan Air Self-Defense Force
Registration: 57-4493
C/n / msn: 5075
Fatalities:Fatalities: 0 / Occupants: 4
Other fatalities:0
Aircraft damage: Minor
Location:near JASDF Okinoerabujima Sub Base, Kagoshima prefecture -   Japan
Phase: Approach
Nature:Military
Departure airport:Naha Air Base (OKA/ROAH)
Destination airport:JASDF Okinoerabujima Sub Base
Narrative:
A CH-47J of Naha Helicopter Airlift Squadron, Japan Air Self-Defense Force lost the upper half of aft cargo door (160cm x 24cm x 4cm, 31kg) during an approach from southeast to the heliport in JASDF Okinoerabujima Sub Base, Okinoerabujima island, Kagohima prefecture. No personal injuries nor damages on the ground were reported, and the Chinook landed safely on the heliport. The CH-47J departed from Naha Air Base/Naha Airport for a night time training flight. The fallen part was located and recovered at 200m southeast from the heliport next morning. JASDF says that no anomaly on the aft cargo door had been found in the maintenance on 24th February.

On 6th June 2018, JASDF released an abstract of the final report:
The cause of the incident was a maintenance error. The lock mechanism of the cargo door of the CH-47J had been damaged while removing the door during a regular maintenance in February. Reassembling the door with damaged lock mechanism, the door was locked incompletely. And the door was unlocked by vibration during the incident flight.

Sources:

[LINK NOT WORKING ANYMORE:https://headlines.yahoo.co.jp/hl?a=20180306-00050119-yom-soci]
[LINK NOT WORKING ANYMORE:https://headlines.yahoo.co.jp/hl?a=20180306-00000129-mai-soci]
[LINK NOT WORKING ANYMORE:https://headlines.yahoo.co.jp/hl?a=20180306-00000136-jij-soci]
[LINK NOT WORKING ANYMORE:https://headlines.yahoo.co.jp/hl?a=20180306-00000097-asahi-soci]
[LINK NOT WORKING ANYMORE:https://headlines.yahoo.co.jp/hl?a=20180307-00000042-mai-soci]
[LINK NOT WORKING ANYMORE:https://headlines.yahoo.co.jp/hl?a=20180307-00000058-jij-soci]
[LINK NOT WORKING ANYMORE:https://headlines.yahoo.co.jp/hl?a=20180307-00000081-mai-soci]
https://headlines.yahoo.co.jp/hl?a=20180606-00000080-asahi-soci

http://www.mod.go.jp/asdf/news/houdou/H29/300306.pdf
http://www.mod.go.jp/asdf/news/houdou/H29/300307.pdf
http://www.mod.go.jp/asdf/news/houdou/H30/300606.pdf


Revision history:

Date/timeContributorUpdates
07-Mar-2018 06:46 isamuel Added
07-Mar-2018 09:39 isamuel Updated [Source, Narrative]
07-Mar-2018 17:12 isamuel Updated [Source, Narrative]
07-Mar-2018 17:28 Iceman 29 Updated [Embed code]
06-Jun-2018 13:53 isamuel Updated [Registration, Cn, Source, Embed code, Narrative]

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