What was found
FOUND BOTH AIR SPRING UPPER SUPPORT BRACKETS ON AIR STAIR DOOR CRACKED DURING A C-CHECK. ALTHOUGH NOT A SAFETY OF FLIGHT ISSUE, THIS IS THE SECOND OF OUR ACFT TO HAVE THIS BRACKET FAIL. HAD 1 FAIL IN THE SUMMER OF 2010, WHICH WE FEEL DID NOT WARRANT AN SDR, BASED ON THE FLOW CHART. ADDITIONALLY SPEAKING WITH ANOTHER CANADIAN OPERATOR AND A PARTS SUPPORT PERSON AT MFG, THIS IS THE 4TH AND 5TH BRACKET TO FAIL IN 2010. OUR COMPANY HAVING 3 IN TOTAL. THE AFT BRACKET WAS ALSO CRACKED AND IS PN 25W331797-002. MFG HAS BEEN ADVISED OF THE ISSUE. WAS TOLD IN THE SUMMER THAT THE BRACKET WAS CHANGED TO A MORE ROBUST DESIGN ON LATER ACFT (WHICH THESE ARE). IT APPEARS THIS HAS NOT IMPROVED THE SITUATION.