What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
(-23) Pull out of the gate on time flt. 7229, iad -orf. We took off and was in a climb to 3000 when a loud bang happened, after that we experienced a strong vibration of which we had no idea of what was causing it. Our first thoughts were the lav door came off. We contacted dispatch and returned back to iad. After shot down we saw the left deicer boot on one of the blades was off, hitting the side of the cabin causing the vibration.
As the FAA filed it
(-23) PULL OUT OF THE GATE ON TIME FLT. 7229, IAD -ORF. WE TOOK OFF AND WAS IN A CLIMB TO 3000 WHEN A LOUD BANG HAPPENED, AFTER THAT WE EXPERIENCED A STRONG VIBRATION OF WHICH WE HAD NO IDEA OF WHAT WAS CAUSING IT. OUR FIRST THOUGHTS WERE THE LAV DOOR CAME OFF. WE CONTACTED DISPATCH AND RETURNED BACK TO IAD. AFTER SHOT DOWN WE SAW THE LEFT DEICER BOOT ON ONE OF THE BLADES WAS OFF, HITTING THE SIDE OF THE CABIN CAUSING THE VIBRATION.