LH1390 - Incident: Lufthansa CRJ9 at Frankfurt on Apr 21st 2025

A Lufthansa Canadair CRJ-900, registration D-ACNX performing flight LH-1390 from Frankfurt/Main (Germany) to Poznan (Poland), was climbing out of Frankfurt's runway 18 when the crew stopped the climb at FL220 and decided to return to Frankfurt reporting there were pressurization problems with one of the doors and strong noise in the cockpit. The aircraft landed safely back on Frankfurt's runway 25L about 25 minutes after departure.

The aircraft remained on the ground over night for about 9 hours, then departed for another flight but needed to return again.