SYNOPSIS
Immediately after take-off from Dublin (EIDW), on an early morning scheduled passenger flight to Munich, Germany (EDDM), the Flight Crew detected an unusual odour in the cockpit. A short time later, the Cabin Crew reported that there were fumes in the aircraft cabin. Following an assessment of the situation, the Flight Crew declared a PAN (state of urgency) to Air Traffic Control (ATC) and donned their oxygen masks. The aircraft returned to EIDW, where a normal landing and taxi to stand were performed. The passengers disembarked using an air bridge.
The fumes were subsequently attributed to an incorrectly performed engine wash procedure, which was carried out by maintenance personnel the night before the occurrence flight. No injuries were reported to the Investigation.
