What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
On 11/13/21, privacy data omitted was being marshalled into gate B5 at Burbank, CA. The captain made an early "tight" turn to line up on the "j" line for gate B5. All gse were clear of the circle of safety. Wing walkers were in place with lead ramp agent acting as marshaller. Air stairs was clear of the circle of safety by approximately two feet. Left wing walker initially gave the all clear signal to the marshaller. The marshaller was concentrating on getting the aircraft to move right to be on the "j" line. As the aircraft was continuing to advance to park, the left wing walker realized the left scimitar was going to contact the vertical protective covering of the air stair railing. The left wing walker gave the stop signal to the marshaller but the marshaller was concentrating on the aircraft and did not see the wing walkers signal. The left wing scimitar grazed the protective covering of the air stairs. The aircraft continued forward to the final parking spot. Neither ramp crew or flight crew saw any damage to the left wing scimitar when inspected. Company maintenance was notified. Maintenance inspected the left scimitar and felt the damage was significant enough to require removal prior to the aircrafts next flight. This was accomplished with the additional step of removing the right wing scimitar to keep aerodynamic loads equal on both wings.
As the FAA filed it
ON 11/13/21, ^PRIVACY DATA OMITTED^ WAS BEING MARSHALLED INTO GATE B5 AT BURBANK, CA. THE CAPTAIN MADE AN EARLY "TIGHT" TURN TO LINE UP ON THE "J" LINE FOR GATE B5. ALL GSE WERE CLEAR OF THE CIRCLE OF SAFETY. WING WALKERS WERE IN PLACE WITH LEAD RAMP AGENT ACTING AS MARSHALLER. AIR STAIRS WAS CLEAR OF THE CIRCLE OF SAFETY BY APPROXIMATELY TWO FEET. LEFT WING WALKER INITIALLY GAVE THE ALL CLEAR SIGNAL TO THE MARSHALLER. THE MARSHALLER WAS CONCENTRATING ON GETTING THE AIRCRAFT TO MOVE RIGHT TO BE ON THE "J" LINE. AS THE AIRCRAFT WAS CONTINUING TO ADVANCE TO PARK, THE LEFT WING WALKER REALIZED THE LEFT SCIMITAR WAS GOING TO CONTACT THE VERTICAL PROTECTIVE COVERING OF THE AIR STAIR RAILING. THE LEFT WING WALKER GAVE THE STOP SIGNAL TO THE MARSHALLER BUT THE MARSHALLER WAS CONCENTRATING ON THE AIRCRAFT AND DID NOT SEE THE WING WALKERS SIGNAL. THE LEFT WING SCIMITAR GRAZED THE PROTECTIVE COVERING OF THE AIR STAIRS. THE AIRCRAFT CONTINUED FORWARD TO THE FINAL PARKING SPOT. NEITHER RAMP CREW OR FLIGHT CREW SAW ANY DAMAGE TO THE LEFT WING SCIMITAR WHEN INSPECTED. COMPANY MAINTENANCE WAS NOTIFIED. MAINTENANCE INSPECTED THE LEFT SCIMITAR AND FELT THE DAMAGE WAS SIGNIFICANT ENOUGH TO REQUIRE REMOVAL PRIOR TO THE AIRCRAFTS NEXT FLIGHT. THIS WAS ACCOMPLISHED WITH THE ADDITIONAL STEP OF REMOVING THE RIGHT WING SCIMITAR TO KEEP AERODYNAMIC LOADS EQUAL ON BOTH WINGS.