Loss of pressurization Incident ATR 42-320 C-GDSS,
ASN logo
ASN Wikibase Occurrence # 351184
This record has been locked for editing.

Date:Tuesday 16 January 2024
Time:16:18 UTC
Type:Silhouette image of generic AT43 model; specific model in this crash may look slightly different    
ATR 42-320
Owner/operator:Calm Air
Registration: C-GDSS
MSN: 329
Year of manufacture:1994
Fatalities:Fatalities: 0 / Occupants:
Aircraft damage: None
Location:50 nm NE of Winnipeg, MB -   Canada
Phase: En route
Departure airport:Winnipeg-James Armstrong Richardson International Airport, MB (YWG/CYWG)
Destination airport:Sanikiluaq Airport, NU (YSK/CYSK)
Investigating agency: TSB
Confidence Rating: Information verified through data from accident investigation authorities
Calm Air International flight CAV240, an ATR 42-320was climbing through FL200 when the flight crew observed a Master Warning light with a CCAS 'Excess Cabin Altitude' message. The flight crew contacted ATC and requested a descent to 10,000 feet ASL and a clearance to return to CYWG. In the descent, the flight crew carried out the QRH checklist and was able to decrease the cabin altitude in manual mode. The aircraft landed uneventfully in CYWG. A subsequent inspection by the operator's maintenance revealed a the flexible hose connected to the T-fitting on the jet pump to be seized. The flexible hose and check valve were replaced. The operator's maintenance also replace the digital pressurization controller. Pressurization runs and a test flight was completed and the aircraft was returned to service. The previous and a subsequent flight of C-GDSS had similar events.


TSB A24C0009

History of this aircraft

Other occurrences involving this aircraft
26 August 2011 D-BCRN Avanti Air, opf Meridiana 0 26 NM N of isola di Pantelleria non
Near miss
18 January 2024 C-GDSS Calm Air 0 60 nm S of Thompson, MB non
Loss of pressurization

Revision history:

26-Jan-2024 17:40 harro Added
26-Jan-2024 17:41 harro Updated [Other fatalities, Location]

The Aviation Safety Network is an exclusive service provided by:
Quick Links:

CONNECT WITH US: FSF on social media FSF Facebook FSF Twitter FSF Youtube FSF LinkedIn FSF Instagram

©2024 Flight Safety Foundation

1920 Ballenger Av, 4th Fl.
Alexandria, Virginia 22314