FlightFollowerEngine rollback on takeoff United Boeing 777 | Emergency Landing in Denver
United Airlines flight UA1736 had only recently departed Denver for Kahului, Hawaii, on 12 June 2025 when the crew reported a rollback on the No. 2 engine of its Boeing 777-222ER, N219UA. The pilots did not immediately leave the airport area. They remained nearby while working through the applicable procedures and assessing whether the engine could produce usable thrust. It could not, and the aircraft returned for a landing at Denver.
Accident Facts
- Date
- 12 June 2025
- Registration
- N219UA
The engine problem appeared immediately after departure
The available aircraft record identifies N219UA as a Boeing 777-222ER operating UA1736. The problem occurred shortly after departure from Denver. The crew reported the engine rollback to ATC and declared an emergency.
The important sequence is that the crew did not treat the first indication as the end of the flight. They stayed in the local area while running the required checks and determining whether the engine could be recovered.
The No. 2 engine did not regain useful thrust
The crew later reported that they could not obtain any rate of thrust from the affected engine. The available record does not establish a final mechanical cause, and no unsupported cause is added here.
With the engine unavailable for useful thrust, the crew transitioned from troubleshooting to returning the aircraft to the airport. The 777 remained controllable on the remaining engine power and was positioned for a visual approach.
A controlled return
The aircraft landed on Runway 26 and then stopped on a taxiway so emergency personnel could inspect it. the documented record does not report injuries or aircraft damage.
The event therefore remained an emergency return rather than an accident. The source establishes the engine rollback and loss of useful thrust; it does not establish the underlying component failure that produced the rollback.
The documented record
“We are unable to get any rate of thrust out of number two.” — the UA1736 flight crew in the ATC account
Conclusion
The key facts are the timing, the crew’s decision to remain near Denver while completing the checklist, the continued loss of useful thrust from No. 2 engine and the eventual safe landing. The available record does not establish why the rollback occurred, so the evidence does not support a mechanical-cause story without an investigation finding.