Join Date: Oct 2006
Location: London, UK
Programs: BA Gold, VS Silver, SQ Silver, IHG Plat Amb, Hilton Gold, Marriott Plat, Accor Silver, Radisson Prem
Posts: 16,873
If you are at all worried about something, you should mention it to the crew.
Passengers didn't do this in the recent SQ A380 depressurisation, and that ended up in a decompression...
If everything is fine, the crew really will not mind you pointing it out. Better safe than sorry.