Originally Posted by
Mumbai Merlin
It is common at Port Moresby to see the Fokker 100 and 70's taxi with one reverser deployed at idle thrust to control taxi speed, especially with a tail wind.
Qantas Dash 8-400 crews quite often shutdown the left hand engine at Port Moresby mid way on the taxi to tarmac, to avoid riding the brakes
It's fuel saving, zero to do with brakes.