AN A320 EXPERIENCES A TEMPORARY LOSS OF ACFT CTL FROM WAKE TURB WHEN CLBING TO THE SAME FLT LEVEL AS A B747 10 MI AHEAD. WX WAS MOSTLY CLR AND THERE WAS NO EVIDENCE OF A CONDENSATION TRAIL. RPTR HAD ASKED FOR CLB TO AVOID CLOUDS SINCE THEIR ENG ANTI-ICE WAS INOP.

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DISPATCHED WITH ENG ANTI-ICE INOP DUE TO BLEED VALVE LOCK-OUT. ALSO LIMITED TO FL310. DEST AND ENRTE FORECASTS OK FOR THIS FLT. INITIAL CLB TO FL270 DUE TO B747 AT FL290. CLOUDS ENCOUNTERED ABEAM SEA VORTAC REQUIRING ANTI-ICE. CLBED TO FL290; B747 10 NM AHEAD. UPON REACHING FL290; ENCOUNTERED LIGHT CHOP ASSOCIATED WITH JET WASH THEN A RAPID R 30 DEG BANK FOLLOWED BY L 30 DEG BANK. AUTOPLT DISENGAGED AND UNUSUAL ATTITUDE RECOVERY PROC USED TO REGAIN ACFT CTL. IMMEDIATE DSCNT TO FL270 INITIATED. WAKE TURB STOPPED AT FL287. CRUISE WINDS 280 DEGS AT 10 KITS. ATC CTLRS INFORMED. NO CREW MEMBERS NOR PAX INJURED. NEVER BEFORE EXPERIENCED WAKE TURB AT CRUISE ALT AND AT 10 NM SPACING. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE PIC; PF; WAS SURPRISED AT THIS UNEXPECTED ENCOUNTER. HE HAD ALWAYS EXERCISED CAUTION WHEN BEHIND B747-757 TYPE ACFT DURING APCH AND LNDG BUT HAD NEVER HAD THIS OCCUR AT THE HIGHER ALTS. HE HAD NOT THOUGHT OF ASKING FOR AN OFFSET TO THE UPWIND SIDE OF THE B747 BUT WILL IN THE FUTURE. A TA WAS NOT GIVEN AND IT APPEARED TO THE RPTR THAT ATC DID NOT EXPECT THAT THERE WOULD BE ANY WAKE TURB IN THAT AREA OF CLB. RPTR FELT THAT ATC SHOULD BE MORE EDUCATED IN THOSE PROCS THAT WOULD ASSIST FLCS TO AVOID PROBLEMATIC VORTEX AREAS.