Air North B734 near Vancouver on Feb 10th 2023, loss of cabin pressure, bleed valves forgotten

Last Update: February 20, 2023 / 20:59:12 GMT/Zulu time

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Incident Facts

Date of incident
Feb 10, 2023

Classification
Incident

Airline
Air North

Flight number
4N-452

Departure
Vancouver, Canada

Destination
Whitehorse, Canada

Aircraft Registration
C-FANB

Aircraft Type
Boeing 737-400

ICAO Type Designator
B734

An Air North Boeing 737-400, registration C-FANB performing flight 4N-452 from Vancouver,BC to Whitehorse,YT (Canada) with 102 passengers and 5 crew, had levelled off at FL320 about 90nm north of Vancouver when the crew received indications that the cabin altitude neared 10,000 feet. The crew donned their oxygen masks and initiated an emergency descent, during the descent the cabin altitude warning horn sounded. The crew declared PAN PAN and received vectors to return to Vancouver. The crew worked the related checklist and discovered that the engine bleed valves had not been switched on. The crew stopped the descent at about 14,000 feet, the cabin altitude began to reduce as pressurization was regained. The crew cancelled PAN PAN, checked their fuel, requested and received a clearance to continue their flight to Whitehorse, where the aircraft landed without further incident.
Aircraft Registration Data
Registration mark
C-FANB
Country of Registration
Canada
Date of Registration
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Certification Basis
KheknbjlmjndAghbnqh Amkklchclmb nfmAgdikchggdm Subscribe to unlock
TCDS Ident. No.
Hgic Subscribe to unlock
Manufacturer
Boeing
Aircraft Model / Type
737-48E
ICAO Aircraft Type
B734
Year of Manufacture
Npqj Subscribe to unlock
Serial Number
Kdqgc Subscribe to unlock
Aircraft Address / Mode S Code (HEX)
Mb lfh Subscribe to unlock
Maximum Take off Mass (MTOM) [kg]
Pdihq Subscribe to unlock
Engine Count
J Subscribe to unlock
Engine Type
Kbqcqpcg Subscribe to unlock
Main Owner
PhphkAipAidjeppelc cpkellgfedjhlncdpAnfjpj cg qjqhdff qdcnn dbAhhbgdgkbijbAAefdApqnqcqqk Subscribe to unlock

Aircraft registration data reproduced and distributed with the permission of the Government of Canada.

Incident Facts

Date of incident
Feb 10, 2023

Classification
Incident

Airline
Air North

Flight number
4N-452

Departure
Vancouver, Canada

Destination
Whitehorse, Canada

Aircraft Registration
C-FANB

Aircraft Type
Boeing 737-400

ICAO Type Designator
B734

This article is published under license from Avherald.com. © of text by Avherald.com.
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