What was found
MANIFOLDS THAT WERE REWORKED IAW SB 390700-27-002 WERE IDENTIFIED AS PN 390752LRW1-101, WHEREAS NEW MANIFOLDS RETAINED THE PRODUCTION PN 390752-101. UNITS HAVING BEEN MODIFIED IAW SB 390700-27-002 HAD THE LETTER A APPENDED TO THE SN. THERE HAVE BEEN 3 MANIFOLD FAILURES OCCUR ON POST-SB UNITS WITH REWORKED VERSION OF MANIFOLD 390752LRW1. EVALUATION OF THE FAILED UNITS REVEALED THAT REWORK HAD NOT BEEN PERFORMED PROPERLY, ALTHOUGH THE 0.030/0.060 EDGE BREAK HAD BEEN APPLIED, THE EDGES HAD NOT BEEN PROPERLY BLENDED TO REMOVE DISCONTINUITIES & THE ANODIZE SURROUNDING THE EDGE BREAK. POTENTIALLY AFFECTED UNITS WILL NOT ONLY HAVE THE A SUFFIX ON THE TOP ASSEMBLY SN, BUT ALSO HAVE “-101 LRW1” MARKING UNDER THE MANIFOLD PN. A LIST OF POTENTIALLY AFFECTED SNS IS PROVIDED IN APPENDIX A. FAILURE OF THE MANIFOLD WILL RESULT IN EXTERNAL LEAKAGE OF HYD FLUID.