Apparently FIA is investigating following engine models sent abroad by PIA for maintenance/repair/overhaul.
Pratt & Whitney PW4000 that powered airline's Airbus A310-300 aircraft.
Rolls-Royce RB211 that powered airline's Boeing 747-300 aircraft.
Pratt & Whitney Canada PW127 that power airline's ATR 42/72 aircraft.
General Electric GE90 that power airline's Boeing 777 aircraft.
FIA questionnaire for PIA.
Abbas