hi,
HO ACCESS is rarely sent on SACCH. If cell is synchronized (intra-BTS HO), then HO ACCESS is sent on FACCH exclusively, 4 times.
In case on non-sycn cells :
3GPP 44.018
3.4.4.2.2 Non synchronized cell case
After having switched to the assigned channels, the mobile station starts repeating the HANDOVER ACCESS message in successive layer 1 frames on the main DCCH ( = FACCH) and optionally on the SACCH. This message is sent in an access burst. Its content is reduced to the handover reference information element. The mobile station starts timer T3124 at the start point of the timeslot in which the HANDOVER ACCESS message is sent the first time on the main DCCH.