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ASN Wikibase Occurrence # 186533
Last updated: 14 June 2019
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Date:17-APR-2016
Time:09:29 JST
Type:Silhouette image of generic CRJ7 model; specific model in this crash may look slightly different
Bombardier CL-600-2C10 (CRJ-702NG)
Owner/operator:IBEX Airlines (ANA connection)
Registration: JA06RJ
C/n / msn: 10303
Fatalities:Fatalities: 0 / Occupants: 40
Other fatalities:0
Aircraft damage: Unknown
Category:Serious incident
Location:over Matsue city, Shimane prefecture -   Japan
Phase: En route
Nature:Domestic Scheduled Passenger
Departure airport:Fukuoka Airport (FUK/RJFF)
Destination airport:Komatsu Airport (KMQ/RJNK)
Investigating agency: JTSB
Narrative:
IBEX Airlines' flight IBX/FW84 was a scheduled passenger flight from Fukuoka/Itazuke (STD 07:40) to Kanazawa/Komatsu (STA 09:00). The airplane aborted its approach to Komatsu due to strong cross wind (18033G53KT for the runway 24/06).
The flight crew decided to head back to Fukuoka.
At 09:25, while en route at FL400 the left side bleed air L BLEED DUCT warning showed up on the EICAS, indicating a leak.
The flight crew initiated a descent and started the checklist corresponding to bleed air leak. At 09:29, at about FL385, there was an additional warning of a leak of right bleed air system.
The flight crew then began an emergency descent to FL100. The flight crew requested priority for landing and made a safe landing to Fukuoka on 10:08.

The JTSB stated that the AILC (Anti-Ice and Leak Detection Controller) could have malfunctioned during the flight, although no faults were found upon further inspection of the AILC.

ROBABLE CAUSES
In this serious incident, it is highly probable that both bleed air systems stopped supplying the bleed air and the cabin altitude rose, because the AILC (Anti-Ice and Leak Detection Controller) had detected the air leaks on both bleed air systems.
It was not possible to determine why the AILC detected the bleed air leaks, although it was somewhat likely that there was any malfunction in the AILC, the bleed air leaked actually, or the sensing elements had any malfunction.

Sources:

JTSB

Accident investigation:
cover
  
Investigating agency: JTSB
Status: Investigation completed
Duration: 1 year and 8 months
Download report: Final report


Revision history:

Date/timeContributorUpdates
18-Apr-2016 06:50 isamuel Added
18-Apr-2016 13:09 isamuel Updated [Time, Location, Source, Narrative]
23-Dec-2017 12:32 harro Updated [Narrative]
28-Dec-2017 11:57 harro Updated [Source, Narrative]

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