An Airbus A321-131 operated by Lufthansa (D-AIRT) and a Boeing 737-800 operated by SunExpress (TC-SNM) experienced significant damage following a ground collision at Prague, Czech Republic. The A321 was cleared to taxi to runway 06 via taxiways H, F, and E, with an intersection takeoff. The aircraft was positioned 34.5 meters behind an Airbus A320, which was positioned behind the stop bar. The crew reported readiness at 10:31. Simultaneously, the Boeing 737-800 was cleared to taxi to the beginning of runway 06 via taxiways A1, Z, H, and F. This necessitated the 737 taxiing along taxiway F, passing the taxiway E turnoff where the A321 was located. At 10:38, a right-hand winglet of the 737 impacted the left-hand horizontal stabilizer of the A321. The top of the winglet broke off, and the tip of the horizontal stabilizer was almost entirely severed. The incident is attributed to a human factor failure ? the taxiing crew failing to maintain a safe separation distance from the standing aircraft.An Airbus A321-131 operated by Lufthansa (D-AIRT) and a Boeing 737-800 operated by SunExpress (TC-SNM) experienced significant damage following a ground collision at Prague, Czech Republic. The A321 was cleared to taxi to runway 06 via taxiways H, F, and E, with an intersection takeoff. The aircraft was positioned 34.5 meters behind an Airbus A320, which was positioned behind the stop bar. The crew reported readiness at 10:31. Simultaneously, the Boeing 737-800 was cleared to taxi to the beginning of runway 06 via taxiways A1, Z, H, and F. This necessitated the 737 taxiing along taxiway F, passing the taxiway E turnoff where the A321 was located. At 10:38, a right-hand winglet of the 737 impacted the left-hand horizontal stabilizer of the A321. The top of the winglet broke off, and the tip of the horizontal stabilizer was almost entirely severed. The incident is attributed to a human factor failure ? the taxiing crew failing to maintain a safe separation distance from the standing aircraft.