The RAFROs who mostly operate HQAC are only there for a few years then move on to other things so there's a constant turnover of staff hence there is no 'pool' of memories from the past.
I presume there are records kept somewhere but where they are kept (Kew?) and how often they are 'purged' of dead wood there is no way of knowing. To illustrate, we all know that GRP glider servicing records were only kept by SERCO for a couple of years before being destroyed.