ILS tuning

[Craig]

I really hope this makes sense to some of you, here goes.

last while descending into Heathrow I was tuning the ILS which was 109.5 for RWY 27L when I was tuning the freq I couldn’t get it onto 109.05. I could get 109.95, 109.10 109.00 but could get it on 109.05 

had to land manually. 
 

I hope that makes sense

 

Thanks 

Craig 

[Aburek]

ILS was 109.5, therefore you should have tuned to 109.50.  xxx.05 is not valid.

[Alexair]

Aburek is right, you can tune only ILS frequencies in the ILS tuning box, all other frequencies (ie: VOR) cannot be tuned. It's normal and common on airliners.