Accountability is the word every executive uses and few define. Here is how I define it: ownership of outcomes, not activities, with no gap between what you expect of others and what you expect of yourself.
The standard is set at the top
In a mortgage company, a board, regulators, and examiners hold the chief executive accountable for everything that happens in every branch. There is no 'I didn't know.' That reality forces a particular style of leadership: you build controls, you verify, and you make sure the people closest to the work understand why the rules exist. The same is true in aviation, where the person signing a logbook entry is personally accountable for it.
Accountability is not blame
A culture of accountability is not a culture of punishment. When something goes wrong, the question is what the system allowed and how to fix it, not who to fire. People take ownership when they trust that honesty will be met with problem-solving rather than retribution.
It starts with clarity
You cannot hold someone accountable for an outcome they did not know they owned. Clear roles, written expectations, and a regular operating cadence are the unglamorous foundation. Most accountability failures I have seen were really clarity failures.
Long-term thinking is the test
The clearest sign of an accountable leader is willingness to make a decision that costs something this quarter to protect the business over the next decade: passing on volume that does not meet standards, grounding an airplane that is technically legal but not right, or walking away from a deal that is priced for optimism. Accountability, in the end, is just taking the long view seriously enough to act on it.