Because of trouble with its landing gear, a commuter jet carrying only a crew made an emergency landing yesterday at Philadelphia International Airport. None of the three people on board was hurt.

The US Airways Express flight was flying to Philadelphia from Norfolk, Va. A spokesman for the airline said the only occupants were the captain, the first officer, and an attendant. The main gear under the left wing failed to come down, an airline spokeswoman said.

The plane, which can carry up to 50 passengers, was delayed getting out of Norfolk, and its booked passengers had been put on earlier flights.

The airport put a halt on all takeoffs and landings between 5:05 and 6:27 p.m. as officials dealt with the emergency on a major runway, 27 Left. When it came down, the plane skidded to a stop on the runway and was sprayed with fire-retardant foam.

- Craig R. McCoy