#3eng indicate fuel tank bost pump fail in flight. after landing ops check by external power bost pump ok.again eng run same problem.#3 Generator voltage,frq ok.but when #3 tank bost pump operate by #4 eng Generator or external power then bost pump works properly.#3 generator works bus tie and all indicator system except #3 bost pump operate
help Pls
No 3eng 'gen out' light came on in flight,no voltage,no frequency,no load found in the para meter.after reset volt,freq came on and goes out again.after landing gen replace but no action.