A United Boeing 737 returned to Calgary twice with the same engine problem

  • United-Airlines-Boeing-777-300(ER)--1

    United Airlines

    IATA/ICAO Code:

    Airline type:
    A full-service carrier

    Chicago O’Hare International Airport, Denver International Airport, Guam International Airport, Houston George Bush Intercontinental Airport, Los Angeles International Airport, Newark Liberty International Airport, San Francisco International Airport, Washington Dulles International Airport

    Year of foundation:
    1931 year

    Star Alliance

    General Director:
    Scott Kirby

    United States

  • 787-8 Dreamliner


    Promotion code:

    Date of establishment:

    General Director:
    Dave Calhoun

    Headquarters location:
    Chicago, USA

    Main product lines:
    Boeing 737, Boeing 747, Boeing 757, Boeing 767, Boeing 777, Boeing 787

    Business Type:

A month ago United Airlines Boeing 737-900 the plane had to return to the departure airport – not once, but twice. Information about this incident, which took place on Monday, July 11, has now been published.

The aircraft involved has registration number N38459 and is pictured above. It’s only 10 years old and United is the only airline that has ever operated it.

The plane was on scheduled flight UA750. The flight departs Calgary International Airport (YYC) at 13:54 and arrives in the village George W. Bush Intercontinental Airport Houston (IAH) at 18:59.


On the day of the incident, there were 178 people on board N38459. Little did they know that it would take them many more hours than expected to land in Texas.

Engine overheating

The aircraft was departing Calgary on schedule when the crew received an overheat alarm on the right engine (CFM56). The decision was then made to return to Calgary.

Once there, he received a technical intervention. By the time it was over and by the time the plane took off again, nearly four and a half hours had passed since its original scheduled departure time.

Once again, as the aircraft was climbing to 13,000 feet, the crew received an alarm that the right engine was overheating. The incident report indicates that the crew then went through the appropriate checklist and idled the engine. After that, the overheating indication disappeared.

The plane once again returned to Calgary and landed safely a second time. Maintenance reviewed it again.

What did maintenance do?

According to the Transportation Safety Board of Canada (TSB) report, there was no excess exhaust gas temperature (EGT).

Maintenance crews replaced several parts on the plane after they discovered malfunctions with both right engine fire circuits. All engine fire circuits and engine core harnesses have been replaced, as has the engine/APU fire detection module.

What happened to the plane?

The plane finally left Calgary for Houston on July 14th, so three days later. He returned to Houston on the flight number he was supposed to take on the day he was diverted twice to Calgary, UA750.

The aircraft, on the first leg of its rotation that day as flight UA2205 from Houston to Calgary, registered as N78448, stayed in Houston for two full days and did not return from Calgary to Houston until July 16.

The aircraft involved in the incident has been fully operational since the re-rollover on July 11. Since then, he has had no diversions to indicate ongoing problems with that particular aircraft, but there has been one significant delay.

At the time of writing, the plane was at Rafael Hernandez International Airport (BQN) in Puerto Rico, where it had been delayed overnight after a heavily delayed arrival for what was supposed to be a late evening flight from Newark Liberty International Airport (EWR). Instead of arriving at BQN yesterday at 23:53 as scheduled, it landed at 03:30 this morning, thus almost four hours late.

It is believed that due to maximum crew hours, the return flight has been delayed by 19 hours and will depart BQN for EWR at 20:10 local time today instead of 01:05 as planned.

Source: Aviation Bulletin

https://simpleflying.com/united-boeing-737-returns-to-calgary-twice-with-the-same-engine-issue/ A United Boeing 737 returned to Calgary twice with the same engine problem

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