A combination of high costs, congressional opposition, and questionable efficacy resulted in a very short operational period.

Throughout its operational period a number of hunger strikes and riots have occurred there.

Revoke a certificate: To prematurely end the operational period of a certificate effective at a specific date and time.

The Commission began in August 2009 with an operational period of two years.

The engine had a 100% reliability record during this 15 year operational period.

The next two years were a busy operational period for the wing.

The 1980s were also a particularly busy operational period for Carrier Group Two.

The result was an operational period of only eight years.

During its operational period, the aircraft flew 959 hours on patrol and had a part in 2,309 arrests.

After an operational period of four and a half weeks, U-38 returned to Wilhelmshaven on 16 December.