A New York-bound American Airlines jet made an emergency landing at Heathrow Airport in London on Monday after the windscreen cracked.

About 45 minutes after taking off from Zurich in Switzerland, the crew of Flight AA65 declared the emergency.

“The plane landed safely at Heathrow Airport around 11:30 a.m.,” an airline spokesman said.

Mechanics were expected to replace the windscreen of the Boeing 767-300, but it was possible the passengers would be placed on other flights to resume their trip to New York City.

“We don’t know exactly how many passengers were on board, but it was a fairly light load at what is a quiet time of the year,” the spokesman told the Daily Mail.

A Twitter user who was believed to have followed the plane’s descent online described the jet as “flying like a madman,” the report said.

American Airlines #AA65 from Zurich to New York is diverting to Heathrow with squawk 7700 http://t.co/76raoEhy3opic.twitter.com/zVoM0WvSzW

— Flightradar24 (@flightradar24) February 23, 2015