United Flight 1854, a Boeing 737 MAX 9, landed safely, taxied normally and passengers exited at the gate, the airline said.

“United flight 1854 from Grand Cayman to Houston declared an emergency upon landing due to a mechanical indication,” United said in a statement. “The plane landed safely, taxied normally and passengers deplaned at the gate.”

The plane was carrying 83 passengers and six crew members, according to the airline.

Initial flight-tracking reports indicated the crew said the plane’s right main landing gear would not deploy. The aircraft circled northwest of the airport, and air traffic control suggested Runway 9 in case it needed to be closed after the landing.

United did not specify what mechanical indication prompted the emergency.

The incident comes just days after smoke was reported aboard another United Express flight at Bush Intercontinental Airport, prompting a precautionary evacuation Saturday morning. That flight, operated by Mesa Airlines, was headed to Atlanta when a sensor alert indicated smoke in the cabin. No injuries were reported, and the cause of the smoke has not been released.