What was found
EMERGENCY EXIT LIGHTS FLASHING CONSTANTLY IN FLIGHT FROM ROWS 29 TO 39 ON BOTH SIDES OF THE AIRCRAFT LOCKED LP DUE TO REPEAT HISTORY REF LP 3086458. NEEDS FURTHER TROUBLESHOOTING. UNLOCKED LP FOR TECH UPDATE. DEBRIEFED CREW AND VERIFIED ONLY THE TWO OVERHEAD EMER LIGHTS ON THE RIGHT SIDE OF THE AC CAME ON. THEY STATED THE LIGHTS WOULD BE ON FOR 10-15 MIN THEN WOULD SHUT OFF AND COME BACK ON AGAIN. LOCKED LP TO CONFIRM POSITIVE FIX. UNLOCKED LP FOR SIGNOFF. FOUND BROKEN TEST BUTTON ON M1671 LOCATED ON CEILING PANEL ABOVE ROWS 30 AND 31 DEF. SEE WDM 33-51-13-7. REPLACED PER AMM 33-51-06-960-806. OP TEST PER AMM 33-51-00-720-801 TESTS GOOD. TEST BUTTON WAS ON M2627 NOT M1671. AC OKAY FOR SERVICE.