P - L
B
U
M
P
F
F
H
H
Rejoining / downwind checks.
There are lots of versions of this.
The one I was taught was
Brakes
Undercarriage
Mixture
Fuel
Hatches
Harness
One might guess that the P is (propeller) Pitch but I've never flown anything for which it was relevant. Dunno what the other F is. And if you're flying at night there'll be something to do with lights in there as well?