On 14.05.2017 at 09:25 UTC, Tunisair Boeing 737-600 took off from Prague Airport, Czech Republic, for a flight to Jerba/Zarzis, Tunisia. The Airplane lost cabin pressure as it was climbing at FL 320. Oxygen mask were deployed and crew initiated an emergency descent to FL100. Then the plane was diverted Munich Airport in Germany and landed safely. No reported injuries.
The Boeing 737-600 is the smallest model of the B 737 Next Generation (NG) series, designed in the 1990s is powered by two CFM56 engines. The Boeing 737 is equipped with an automatic warning system which acoustically warns the crew if the pressure drop exceeds a cabin pressure altitude of 10,000 ft. If the cabin pressure altitude exceeds 14,000 ft the passenger oxygen masks are triggered automatically. The pilots can also trigger the oxygen masks for the passengers manually.
All passengers and the cabin and cockpit crews had used their oxygen masks.
A leaky valve at the bulk seal at the keel beam of the APU bleed duct was identified as reason for the depressurisation.
Another leakage was found in the area of the left-hand pack.