The hard X-ray (HXR) peak delay of the 3B solar flare in 1354-1624 UT on Ma
rch 6, 1989 was so long as 130 seconds, while the time of rise to the peak
in the lowest energy channel of HXRs was only 150 seconds. The authors expl
ain this peculiar event with the trap plus precipitation model of electrons
and find that it can be well interpreted if there existed two successive s
ources and the coronal density is taken to be 10(9) cm(-3).