Helen D if your confused by NOTAMs and Flight Planning then perhaps you see the thread under the NOTAM section about a proposed visit to AIS at Heathrow.
Leaning engines is a mystry to me and I avoid it where possible - being mechanically challenged I'm convinced that the engine will stop (and I have sufficient history not to be able to mount a suitable defence against the prodding finger of an engineer, his case being based on prejudice, ie if I was near anything it would break regardless of my particpation in the event)