What was found
ON 11-24-89, CESSNA ME84-12 WAS C/W ON LT WING SPAR CARRY-THROUGH. IT WAS DONE IMPROPERLY AND HAS NOW CRACKED FURTHER THAN ALLOWED. AT SOME POINT, THE CRACKS WERE STOP DRILLED CAUSING DAMAGE TO THE CARRY-THROUGH CASTING. SUBMITTER RECOMMENDS WHEN C/W ME84-12, THAT BASIC SHEET METAL PRACTICES SHOULD BE FOLLOWED. IT IS SUBMITTER'S FIRM BELIEF THAT THIS DAMAGE WAS DONE BY IMPROPER PRACTICES USED. TIME SINCE MR84-12 IS 3,582.8 HOURS.