What was found
SHORTLY AFTER LEVEL OFF AT FL30.0 RIGHT WING OVERHEAT LIGHT ILLUMINATED. CHECK LIST PERFORMED, LIGHT EXTINGUISHED BEFORE 5 MINUTES CONTINUED AGAIN, COMPLETED CHECKLIST LIGHT STAYED ON NR 3 AND NR 4 BLEED VALVES CLOSED, RIGHT ISOLATION VALVE CLOSED ZERO AIR PRESSURE NR 3 A/C PACK OPEN. CHECK RIGHT WING PYLON NR 3 AND NR 4 FOR LEAKAGE. FOUND LEAKAGE AT LEADING EDGE DRIVE UNIT NR 2 RIGHT DUCT. RIGHT WING AND LEAKAGE OF SEAL OUTBOARD OF L/E NR 2 RIGHT END MANIFOLD. REPLACED SEALS P/N 820-1-200 AND SEAL P/N 600-600 CHECK FOR LEAKAGE. ALL SATISFACTORY IAW 36-11-00. MEASURE WIRING FROM D4644 TO SWITCHES WITH ISOL TESTER ALL SATISFACTORY. CHECKED BLEED VALVE FOR LEAKAGE FOUND NORMAL. MEASURE WIRING WITH LIGHT