What was found
IN CRZ FLT LOWER AFT BODY OVERHEAT LIGHT CAME ON BLINKING AT VARIOUS RATES. ACCOMPLISHED QRH L.A.B. OVERHEAT CHECKLIST TO INCLUDE CLOSING NR 3 ENG. BLEED. BLINKING SLOWED THEN STOPPED. SYSTEM TESTED GOOD. CONTINUED IN CRUISE WITH NR 3 BLEED CLOSED. R7R OVERHEAT DETECTION PANEL 69-67178-1, WITH CANNED SERVICABLE UNIT FROM A/C 210FE. S/N'S OFF D00176 ON D00172. REMOVED AND REPLACED OVERHEAT DETECTION ACC. UNIT M113 WITH CANNED SERVICABLE UNIT FROM A/C 210FE. SUSPECT BAD LOWER AFT BODY HEAT LITE ASSY. STOPPED. REMOVED AND REPLACED UNITS ABOVE FOR PRECAUTION. SRL 670502 TAG 901161 ON MFG 65-24920-1 SRL 040 TAG 901151