What was found
(CAN) DURING CESSNA PHASED INSP, BULKHEAD, STATION 108, FOUND CRACKED IN 3 PLACES AT RADIUS OF EACH CORNER EXCEPT FOR TOP LEFT. BULKHEAD FORMS BACK OF BAGAGE COMPT AREA. CRACKS RADIATE FROMTHE FLANGE OF BULKHEAD & EXTEND INTO WEB OF BULKHEAD. CHECK OF REST OF FLEET OF SIMILAR AGED AIRCRAFT DISCLOSED 2 OTHER A/C WITH SIMILAR CRACKS & 2 ADDITIONAL A/C WITH CRACKS IN BOTTOM RIGHT RADIUS ONLY. CESSNA HAS BEEN NOTIFIED OF PROBLEM AREA. ALL A/C AFFECTED HAVE BEEN GROUNDED UNTIL EFFECTIVE REPAIRS CAN BE DEVELOPED.