A320 Unusual windshield delamination
This is an unusual one that happened to me a couple of days back. Took over an aircraft and pointed out the delamination of the windshield before my flight. Got the engineering to do their due diligence and they said the delamination was within limits and it was 50 mm limit was 70 mm. (unsure about it being mm or cm but I remember it to be within a margin of 20mm) I accepted the aircraft and off we went. The block time was just 01:05 flight time 00:50. When we were close to TOC which was FL290I noticed the delamination increasing and its contour and shape had changed and the delamination had extended and clearly had crossed in the 20 mm margin and was greater than 70 mm. Now her is the unusual part. Short sector asked for early descent and as we crossed around FL160 the delamination started to decrease but still over the limit. By the time we were on ground it came back to its dimensions that was there earlier. Reported to engineering,it was the first they heard of. They carried out a pressurisation check and nothing. Delamination did not change size or contour. Cleared the aircraft. I took the aircraft back again short sector same block and flight time and it happened again this time we saw a noticeable change from Fl240. Same thing when the diff pressure increased the delamination increased and after landing it went back to its original size and shape. Aircraft was a A320 CEO
Did anyone have a similar occurrence or can explain this. In my experience the delamination size and contour does not change with pressurisation.