Originally Posted by
A0283
Overall the balance is positive, thats why they are on, and why you are allowed to fly with one locked under specified conditions and procedures.
Correct. T/Rs are not allowed to be used in certification of landing distance. But, they are nonetheless certified required equipment. Some operators elect to limited dispatch with one T/R inoperative on a two engine airplane.
When landing on a contaminated runway with one locked, you have to be on your "A" game.