What was found
CREW REPORTS RIGHT BLEED DUCT LEAK, FOLLOWED FLIGHT MANUAL ISLN PROCEDURE AND INDIC REMAINED INTERMITTENT. NR 4 DUCT PRESS WAS 14 PSI WITH VALVE DESELECTED. AFTER CREW REPORTED A (POSSIBLE) RIGHT BLEED DUCT LEAK ON CLIMB WITH MESSAGE EVERY MINUTE AT FL250 AIRCRAFT, AKLMM FOUND NO DUCT LEAK BUT RESISTANCE CHECKS FROM THERMAL SWITCH (S890) TO STA 631 IDENTIFIED A SHORT IN INDICATION WIRING. CHAFED INSULATION ON WIRES (W642) UNDER P-CLAMP, MIDWAY FROM THERMAL SWITCH (S890) AND CONNECTOR D4644J ON WING WAS REPAIRED. ALL WIRE STRANDS WERE FOUND WITHOUT DAMAGE.