What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
British airways B-747-436, reg. # g-civk, s/n 25818.
On Wednesday evening, 29 may 2019, at approximately 1920 hours local time, british airways was pushing back from terminal 7 gate 10 for flight #174 to lhr airport. The B747-436 was pushed back behind the Alaska airlines B737-900 aircraft which was parked at terminal 7 gate 11. As the aircraft was then being pulled forward toward centerline for taxi positioning the left wing of the B747-436 contacted the right horizontal stabilizer of the Alaska airlines B737-900ER. The impact caused a segment of the horizontal stabilizer of the B737-900ER to break off and impale into the left winglet of the B747-436.
As the FAA filed it
BRITISH AIRWAYS B-747-436, REG. # G-CIVK, S/N 25818.
ON WEDNESDAY EVENING, 29 MAY 2019, AT APPROXIMATELY 1920 HOURS LOCAL TIME, BRITISH AIRWAYS WAS PUSHING BACK FROM TERMINAL 7 GATE 10 FOR FLIGHT #174 TO LHR AIRPORT. THE B747-436 WAS PUSHED BACK BEHIND THE ALASKA AIRLINES B737-900 AIRCRAFT WHICH WAS PARKED AT TERMINAL 7 GATE 11. AS THE AIRCRAFT WAS THEN BEING PULLED FORWARD TOWARD CENTERLINE FOR TAXI POSITIONING THE LEFT WING OF THE B747-436 CONTACTED THE RIGHT HORIZONTAL STABILIZER OF THE ALASKA AIRLINES B737-900ER. THE IMPACT CAUSED A SEGMENT OF THE HORIZONTAL STABILIZER OF THE B737-900ER TO BREAK OFF AND IMPALE INTO THE LEFT WINGLET OF THE B747-436.