First B734 near Winnipeg on Jun 2nd 2019, bleed valves and circuit breakers

Last Update: June 7, 2019 / 20:14:47 GMT/Zulu time

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Incident Facts

Date of incident
Jun 2, 2019

Classification
Incident

Airline
First Air

Flight number
7F-702

Aircraft Registration
C-FFNE

Aircraft Type
Boeing 737-400

ICAO Type Designator
B734

A First Air Boeing 737-400, registration C-FFNE performing flight 7F-702 from Winnipeg,MB to Rankin Inlet,NU (Canada) with 50 passengers and 4 crew, was climbing out of Winnipeg when the crew noticed the bleed air valve #1 did not activate and the associated circuit breaker had tripped. The aircraft was enroute at FL310 about 100nm north of Winnipeg, when the crew decided to return to Winnipeg after the circuit breaker had been reset but popped a second time and after consultation with dispatch and maintenance. After turning back the crew noticed the cabin altitude had climbed to 11,000 feet, the crew worked the related checklist and performed an emergency descent. The aircraft landed safely but overweight back in Winnipeg about 50 minutes after departure.

The Canadian TSB reported maintenance found a chafed wiring to the #1 bleed air valve. The wires were replaced and an overweight landing inspection conducted.
Aircraft Registration Data
Registration mark
C-FFNE
Country of Registration
Canada
Date of Registration
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Certification Basis
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TCDS Ident. No.
Manufacturer
Boeing
Aircraft Model / Type
737-406
ICAO Aircraft Type
B734
Year of Manufacture
Serial Number
Aircraft Address / Mode S Code (HEX)
Maximum Take off Mass (MTOM) [kg]
Engine Count
Engine Type
Main Owner
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Aircraft registration data reproduced and distributed with the permission of the Government of Canada.

Incident Facts

Date of incident
Jun 2, 2019

Classification
Incident

Airline
First Air

Flight number
7F-702

Aircraft Registration
C-FFNE

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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