United B739 at Calgary on Jul 11th 2022, returned twice because of engine overheat

Last Update: August 3, 2022 / 18:34:49 GMT/Zulu time

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Incident Facts

Date of incident
Jul 11, 2022

Classification
Incident

Airline
United

Flight number
UA-750

Departure
Calgary, Canada

Destination
Houston Intercontinental, United States

Aircraft Registration
N38459

Aircraft Type
Boeing 737-900

ICAO Type Designator
B739

A United Boeing 737-900, registration N38459 performing flight UA-750 from Calgary,AB (Canada) to Houston Intercontinental,TX (USA) with 178 people on board, was climbing out of Calgary when the crew received a right hand engine (CFM56) overheat indication and decided to return to Calgary.

Following maintenance intervention the aircraft departed again about 4:20 hours after the first departure and was climbing through 13,000 feet when the crew again received a right hand engine overheat indication, worked the related checklists reducing the engine to idle which extinguished the overheat indication and returned to Calgary for another safe landing.

The Canadian TSB reported there had been no EGT exceedance. Maintenance found faults with both right hand engine fire loops, replace all fire loops, the engine core harnesses and replaced the engine/APU fire detection module. Subsequent tests did not reveal any malfunction.
Aircraft Registration Data
Registration mark
N38459
Country of Registration
United States
Date of Registration
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Manufacturer
BOEING
Aircraft Model / Type
737-924ER
Number of Seats
Hib Subscribe to unlock
ICAO Aircraft Type
B739
Year of Manufacture
Bngg Subscribe to unlock
Serial Number
Lqmpm Subscribe to unlock
Aircraft Address / Mode S Code (HEX)
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Engine Count
B Subscribe to unlock
Engine Manufacturer
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Engine Model
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Engine Type
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Pounds of Thrust
Agjhh Subscribe to unlock
Main Owner
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Incident Facts

Date of incident
Jul 11, 2022

Classification
Incident

Airline
United

Flight number
UA-750

Departure
Calgary, Canada

Destination
Houston Intercontinental, United States

Aircraft Registration
N38459

Aircraft Type
Boeing 737-900

ICAO Type Designator
B739

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