Match-drilled hole through F-818B-L-1 baggage rib angle for mounting Garmin GSA28 pitch servo. Riveted pitch servo brackets to baggage rib angles. Assembled servo pushrod. Connected F-840 pushrod assembly to elevator bellcrank and bolted bellcrank center bearing between baggage rib angles. Attached servo pushrod to servo actuation arm and elevator bellcrank and torqued and sealed all nuts. Reinstalled battery tray.