What was found
FLT 1056 PIT-JFK, "SLAT FAIL" EICAS MSG. APPEARED WHILE CLIMBING THROUGH 10,000 FT. SLATS REMAINED FAILED AT ZERO POSITION. FOLLOWED QRH PROCEDURE. APPROACH & LANDING UNEVENTFUL IN ACCORDANCE WITH/QRH. FOUND SLAT PDU BRAKE ENGAGED. PERFORM RIGGING ADJUSTMENT IAW 27-81-00. COULD NOT DUPLICATE FAULT, OK TO CONTINUE SERVICE.