Delta B752 over Canada on Sep 2nd 2025, loss of cabin pressure

Last Update: September 9, 2025 / 19:05:52 GMT/Zulu time

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Incident Facts

Date of incident
Sep 2, 2025

Classification
Incident

Cause
Loss of cabin pressure

Airline
Delta Airlines

Flight number
DL-179

Departure
Kevlavik, Iceland

Destination
Detroit, United States

Aircraft Registration
N821DX

Aircraft Type
Boeing 757-200

ICAO Type Designator
B752

A Delta Boeing 757-200, registration N821DX performing flight DL-179 from Kevlavik (Iceland) to Detroit,MI (USA) with 189 people on board, was enroute at FL360 about 110nm southwest of Goose Bay,NL (Canada) when the crew initiated an emergency descent to 10,000 feet due to the loss of cabin pressure. The aircraft diverted to Montreal,QC (Canada) for a safe landing on runway 24L about 110 minutes after leaving FL360.

The Canadian TSB reported the flight crew noticed the cockpit temperature was increasing and adjusted the left hand pack. Shortly after the right hand pack failed, 30 seconds later the left hand pack also failed. The crew donned their oxygen masks and initiated an emergency descent, descending through FL280 the cabin altitude rose through 14,000 feet, the passenger oxygen masks automatically deployed. During the diversion the right hand pack resumed operation, the left hand one remained failed.

The aircraft returned to service on Sep 4th 2025.
Aircraft Registration Data
Registration mark
N821DX
Country of Registration
United States
Date of Registration
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Manufacturer
BOEING
Aircraft Model / Type
757-26D
Number of Seats
D m Subscribe to unlock
ICAO Aircraft Type
B752
Year of Manufacture
Hkjc Subscribe to unlock
Serial Number
gjbb Subscribe to unlock
Aircraft Address / Mode S Code (HEX)
Mnccgg Subscribe to unlock
Engine Count
N Subscribe to unlock
Engine Manufacturer
Em il fp Subscribe to unlock
Engine Model
Bng be Subscribe to unlock
Engine Type
Clhbiilhl Subscribe to unlock
Pounds of Thrust
Kbjcq Subscribe to unlock
Main Owner
mi qmiinbkAhA qqdAAdbAhil ihn njqjpjmjfghhAdfdckclhgeqngkdiplkglfdAlfgnqkmkcjdlnbfkkqle fhlj mc dlbegigkqbffef Subscribe to unlock
Incident Facts

Date of incident
Sep 2, 2025

Classification
Incident

Cause
Loss of cabin pressure

Airline
Delta Airlines

Flight number
DL-179

Departure
Kevlavik, Iceland

Destination
Detroit, United States

Aircraft Registration
N821DX

Aircraft Type
Boeing 757-200

ICAO Type Designator
B752

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