A United 737 bound for Washington Dulles declared an engine emergency and diverted to Jacksonville

United Airlines Flight 2746 left Orlando on the morning of Friday, September 25, bound for Washington Dulles, and never got past Florida. About half an hour after takeoff the crew declared an emergency over an engine problem, stopped climbing and turned north to Jacksonville, where the Boeing 737-900 landed safely around 10 a.m. local time. The Federal Aviation Administration says it will investigate, and neither the agency nor the airline has said what was wrong with the engine.

The public record is short, and most of it comes from a single FAA notice plus flight-tracking reports of what the aircraft did. The details worth separating are the ones officials have confirmed, the ones aviation outlets reconstructed from radio and radar data, and the ones nobody has yet explained, starting with the cause.

FAA confirmation and unanswered questions

The agency posted its notice to its list of statements on accidents and incidents, and the wording is brief: “United Airlines Flight 2746 landed safely at Jacksonville International Airport in Florida around 10 a.m. local time on Friday, Sept. 25, after the crew reported an engine issue. The Boeing 737-900 departed from Orlando International Airport and was traveling to Washington Dulles International Airport. The FAA will investigate. Please contact the airline for additional information.”

Nothing in the statement mentions injuries, the number of people aboard, a shutdown or a fire, and the agency uses the neutral phrase “engine issue” rather than a failure. The same page lists a run of September incidents that the FAA handled the same way, from a Delta pressurization return at Kennedy to a Southwest bird strike at Baltimore, and in each case the FAA promises an investigation without offering a cause.

The timeline from flight-tracking data

A reconstruction by Airlive puts the departure from Orlando at 12:51 UTC, or 8:51 a.m. Eastern. Roughly 30 minutes later, at about 13:21 UTC, the aircraft squawked 7700, the transponder code for an emergency. The site says the crew reported the engine issue at 13:29 UTC, began the diversion to Jacksonville around 13:39 UTC and landed on runway 08 at 14:03 UTC, which is 10:03 a.m. Eastern and lines up with the FAA’s “around 10 a.m.”

Airlive identifies the aircraft as a 737-900ER registered N66831 and says it stopped climbing at 22,000 feet after the emergency was declared. Another outlet, The Aviation Hub, reports the problem arising while the jet climbed through about 24,000 feet, so the altitude at the moment of the problem varies by source. The registration and the times agree across the reports, and the FAA does not state either.

Code 7700 has a defined role in air traffic control. The FAA’s Aeronautical Information Manual tells pilots facing distress or urgency to squawk it, and notes that “Code 7700 normally triggers an alarm or special indicator at all control positions.” A controller sees the flag immediately, and the flight is handled as a priority.

A twin-engine jet with one engine in question

The 737-900ER in the reports is the largest member of Boeing’s Next-Generation family. Boeing’s specifications list two CFM56-7B engines from CFM International, seating of 175 to 195 in a two-class layout and a range of up to 2,700 nautical miles. The Aviation Hub adds that the aircraft carried 179 passengers and six crew, a count that the FAA statement does not provide.

The same report says modern twin-engine airliners are “designed and certified to fly safely on a single engine,” and that crews train extensively for that case. The reports do not say whether the affected engine was shut down. The Aviation Hub says only that the crew halted the climb and diverted, and the timing fits a controlled descent to a nearby airport: about 24 minutes elapsed between the start of the diversion and touchdown on Airlive’s clock, which is a short trip for a jet that began the day heading to Virginia.

What happened afterward

According to The Aviation Hub, United sent a replacement 737-900, registered N78448, to carry the passengers to Dulles, and they arrived about four hours late. The original aircraft stayed on the ground in Jacksonville for more than 28 hours after landing while engineers inspected it, with a possible component replacement or an engine change still to be decided. The outlet also says United confirmed the landing but released no more detail about the nature of the problem.

Those account details come from a secondary source, not from the airline or the FAA, and they may change once United comments on the inspection. Open questions remain about the specific fault, whether the engine kept running, and whether the FAA investigation will produce a public finding. The FAA statement, still worded only as an engine issue, is the single official document on record for Flight 2746.

This article was produced with the assistance of AI and reviewed by Morning Overview editors prior to publication.

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