The Captain of EI-CRK was making an approach for Runway (RWY) 24 at Shannon when he reported a pressurisation problem and was unable to control cabin altitude. The aircraft broke off the approach and was vectored for a second approach. The aircraft landed safely at 13.17 hrs.
The aircraft later took off for JFK Airport (New York, USA) but at 53N 15W the Captain declared a PAN due to pressurisation problems. The aircraft made an emergency descent from FL350 and the Captain requested a diversion to Shannon. A normal approach was executed and the aircraft, although overweight, landed safely at 16.23 hrs. There were no injuries.