17 Jul 20255:47 reconstruction3K views

United 737 Declares Mayday After Takeoff—Returns Safely to O’Hare

United 737 Returns to O’Hare After Low Oil Pressure Warning

United Airlines Flight UA1316 departed Chicago O’Hare for Sarasota on July 16, 2025, but the flight lasted only about 20 minutes. Shortly after takeoff, the Boeing 737-700, registered N24736, developed a low oil-pressure warning on the right-hand engine. The crew declared an emergency and returned to O’Hare.

The Warning After Takeoff

Airportia and The Aviation Herald reported that UA1316 departed from O’Hare’s Runway 22L and stopped its climb after the low oil-pressure warning appeared. The crew turned back toward the airport and requested an immediate return. The flight was operating a Boeing 737-700 powered by CFM56-7B engines.

A Direct Return

The aircraft returned to O’Hare and landed safely on Runway 28C. Contemporary reports put the landing at roughly 20 to 24 minutes after departure. The aircraft was subsequently returned to service about five hours after landing, according to Airportia’s report.

The Replacement Flight

Because the original aircraft could not continue to Sarasota immediately, United substituted Boeing 737-700 N54711. Airportia reported that the replacement aircraft reached Sarasota about six and a half hours late. The original aircraft remained at O’Hare for several hours before returning to service.

What Happened After the Warning

The reports establish a low oil-pressure warning followed by an emergency return to O’Hare. They do not establish an engine failure, engine damage or a specific mechanical defect. The warning prompted the crew to return to the departure airport.

The contemporary incident report states that the aircraft returned to Chicago O’Hare for a safe landing on runway 28C. That was the central operational outcome.

Accident Facts

Date: July 16, 2025
Aircraft: Boeing 737-700
Registration: N24736
Event: United 737 Returns to O’Hare After Low Oil Pressure Warning
Category: Incident / Emergency

Timeline

July 16, 2025 —

UA1316 departed O’Hare for Sarasota.

Shortly after takeoff —

A low oil-pressure warning appeared on the right-hand engine.

During the climb —

The crew stopped the climb and turned back toward O’Hare.

About 20–24 minutes after departure —

The aircraft landed safely on Runway 28C.

About five hours later —

The aircraft was reported back in service.

Later —

A replacement 737 operated the delayed flight to Sarasota.

Sources

Video source (ATC/audio reconstruction)
Video: United 737 Declares Mayday After Takeoff—Returns Safely to O’Hare.
Airportia, UA1316 incident report: https://www.airportia.com/news/united-b737-at-chicago-on-jul-16th-2025-engine-problem/
Aviation A2Z, July 17, 2025: https://aviationa2z.com/index.php/2025/07/17/united-flight-ua1316-emergency-landing-at-chicago/
AIRLIVE, July 16–17, 2025: https://airlive.net/emergency/2025/07/16/united-flight-ua1316-has-declared-an-emergency-after-takeoff-from-chicago/
Video/ATC recording

Audio from the original air traffic control recording, sourced from public recordings and released investigation records. The reconstruction, animation and written account are our own.