By researching engineering application of helium leakage detection technology on a certain type wing integral fuel tank leak detection to locate the leaking resource accurately and in advance

to remove the trouble preciously

to avoid the hysteresis of problem finding caused by the delay of traditional airtight and oil tightness test procedure

and to reduce rework and time cost

which has obvious benefits. The research result can be generated and applied in other sealing components assembly test

and it is a beneficial exploration on application of digital detection technology in aircraft sealing assembly as well.