TWA currently operates 17 767s.
9 767-300ERs with PW 4060 engines
8 767-200s with PW JT-9D engines
The 767-200s are being retired as they are replaced with the 767-300ERs.
2 767-200s are modified (after factory) for ER and ETOPS use (Not true ER and doesn't have full ER range)
The 767-200s go back to the begining of the 767 program and were the first of the type to cross the Atlantic ocean. The 767-300ERs are new to TWA coming after the last bankruptcy.
Hope that helps.