The Portland Pirates told trustees of the Cross Insurance Arena earlier this spring that a sale of the team was possible and it needed changes in its lease to make operations “sustainable,” the chair of the arena’s trustee board said Thursday morning.

The trustees met for more than an hour with the operating officer of the American Hockey League team, but have still not received formal notification that the team has been sold and will be moved to Springfield, Massachusetts, before the next season begins this fall.

Mitchell Berkowitz, the chair of the trustees of the Cumberland County-owned facility, declined to specify the lease changes that were discussed. Brad Church, the operating officer of the Pirates, said arena officials had agreed to “concessions” in the five-year lease, which has three more years to run, but he also declined to say what changes were being negotiated.

Church said he still doesn’t know the identity of the buyers of the team, but said a letter of intent to purchase the Pirates and move the team has been signed. He said he hasn’t seen the letter.

The arena posted an operating loss of $600,000, exclusive of bond payments of more than $1 million a year for a recent $34 million renovation, for the year ending June 30 2015. Berkowitz said he doesn’t know how much money the arena takes in from hockey games.

Under the lease with the Pirates, damages for breaching the terms are limited to $100,000.

This story will be updated.