What was found
ON CLIMBOUT FROM PASSING 3000 FT, MSL NOTICED A MAGENTA "XB" TO THE RT OF THE NR 2 ENGINE, N2 INDICATION. 3 MINUTES LATER CLIMBING OUT OF 7000 FT THE "XB" EXTINGUISHED. CONFIRMED WITH VIA RADIO. CONTINUED FLIGHT. NO OTHER INDICATIONS OR LIGHTS CAME ON - EVEN WITH CAUTION LIGHT RECALL. ACFT GROUNDED. T/S SYS, REF FIM 76-05, TASK 809. FOUND ENGINE START BRAKE ASSY SWITCH FOR NR 2 ENGINE, SWITCH NR S1027 WITH HIGH RESISTANCE IN IDLE POSITION ALL OTHER SWITCHES, OPS NORMAL. REMOVED ENGINE BRAKE ASSY, REF AMM 76-11-10. R & R SWITCH S1027, REF AMM 76-11-11. REINSTALLED ENGINE START BRAKE ASSY, REF AMM 76-11-10. SYSTEM OPS CHECKS NORMAL, REF AMM 76-11-10. ACFT OK FOR CONTINUED SERVICE.