What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
On March 10, 2017, Alaska airlines flight 769, a B737-900ER, scheduled to fly from Boston Logan international airport (bos) to san diego (san) collided with a deice truck operated by swissport ground handling. The collision occurred in the "juiliet" deice pad at Boston airport.
Flight 469 was being deiced by two trucks operated by swissport. Truck "a? Was deicing the aircraft?s right side; truck ?c? Was deicing the left. Due to staffing issues, the swissport deice supervisor was also acting as the ?follow-me? Vehicle, escorting aircraft into/out of deice pad. Flight 769 was parked at spot 3 in the "juliet" deice pad.
Towards the end of the deice process, the supervisor instructed the trucks to change sides due to wind blowing deice fluid into the open bucket of truck ?a?. This swap was to occur after deicing. Both trucks acknowledged the instruction, completed deicing, parked aft of the aircraft and reported clear. The supervisor then radioed the flight crew the post-deice report, reported clear and drove from the nose to the tail of the aircraft to observe it leave the deice pad. The supervisor reported parking the van facing away from the aircraft.
At this time, truck ?a? Mis-heard a radio instruction to complete a contamination check on asa 769. Truck ?a? Drove into position in front of the left wing and the deice technician returned to the bucket. Truck ?a? Was performing this contamination check when the aircraft began to taxi out of the deice pad. The left wing stuck the extended boom of the deicing truck causing it to tip over.
Truck ?a? Had driven into position after the flight crew visually cleared the area around the aircraft. Flight crew visibility was also hampered by de-ice fluid covering the flight deck windows. The swissport supervisor had lost visual contact of truck a due to parking the vehicle facing away from the aircraft.
No injuries were reported onboard the aircraft. The collision caused minor damage to the aircraft?s left leading edge and winglet. The passengers were deplaned on the deice ramp and bussed to the terminal.
The driver and deice technician of truck ?a? Suffered only minor injuries.
As the FAA filed it
ON MARCH 10, 2017, ALASKA AIRLINES FLIGHT 769, A B737-900ER, SCHEDULED TO FLY FROM BOSTON LOGAN INTERNATIONAL AIRPORT (BOS) TO SAN DIEGO (SAN) COLLIDED WITH A DEICE TRUCK OPERATED BY SWISSPORT GROUND HANDLING. THE COLLISION OCCURRED IN THE "JUILIET" DEICE PAD AT BOSTON AIRPORT.
FLIGHT 469 WAS BEING DEICED BY TWO TRUCKS OPERATED BY SWISSPORT. TRUCK "A? WAS DEICING THE AIRCRAFT?S RIGHT SIDE; TRUCK ?C? WAS DEICING THE LEFT. DUE TO STAFFING ISSUES, THE SWISSPORT DEICE SUPERVISOR WAS ALSO ACTING AS THE ?FOLLOW-ME? VEHICLE, ESCORTING AIRCRAFT INTO/OUT OF DEICE PAD. FLIGHT 769 WAS PARKED AT SPOT 3 IN THE "JULIET" DEICE PAD.
TOWARDS THE END OF THE DEICE PROCESS, THE SUPERVISOR INSTRUCTED THE TRUCKS TO CHANGE SIDES DUE TO WIND BLOWING DEICE FLUID INTO THE OPEN BUCKET OF TRUCK ?A?. THIS SWAP WAS TO OCCUR AFTER DEICING. BOTH TRUCKS ACKNOWLEDGED THE INSTRUCTION, COMPLETED DEICING, PARKED AFT OF THE AIRCRAFT AND REPORTED CLEAR. THE SUPERVISOR THEN RADIOED THE FLIGHT CREW THE POST-DEICE REPORT, REPORTED CLEAR AND DROVE FROM THE NOSE TO THE TAIL OF THE AIRCRAFT TO OBSERVE IT LEAVE THE DEICE PAD. THE SUPERVISOR REPORTED PARKING THE VAN FACING AWAY FROM THE AIRCRAFT.
AT THIS TIME, TRUCK ?A? MIS-HEARD A RADIO INSTRUCTION TO COMPLETE A CONTAMINATION CHECK ON ASA 769. TRUCK ?A? DROVE INTO POSITION IN FRONT OF THE LEFT WING AND THE DEICE TECHNICIAN RETURNED TO THE BUCKET. TRUCK ?A? WAS PERFORMING THIS CONTAMINATION CHECK WHEN THE AIRCRAFT BEGAN TO TAXI OUT OF THE DEICE PAD. THE LEFT WING STUCK THE EXTENDED BOOM OF THE DEICING TRUCK CAUSING IT TO TIP OVER.
TRUCK ?A? HAD DRIVEN INTO POSITION AFTER THE FLIGHT CREW VISUALLY CLEARED THE AREA AROUND THE AIRCRAFT. FLIGHT CREW VISIBILITY WAS ALSO HAMPERED BY DE-ICE FLUID COVERING THE FLIGHT DECK WINDOWS. THE SWISSPORT SUPERVISOR HAD LOST VISUAL CONTACT OF TRUCK A DUE TO PARKING THE VEHICLE FACING AWAY FROM THE AIRCRAFT.
NO INJURIES WERE REPORTED ONBOARD THE AIRCRAFT. THE COLLISION CAUSED MINOR DAMAGE TO THE AIRCRAFT?S LEFT LEADING EDGE AND WINGLET. THE PASSENGERS WERE DEPLANED ON THE DEICE RAMP AND BUSSED TO THE TERMINAL.
THE DRIVER AND DEICE TECHNICIAN OF TRUCK ?A? SUFFERED ONLY MINOR INJURIES.