What was found
LT AND RT THRUST REVERSER, THE SUPPORT BEAMS, ALSO KNOWN AS BIRD CAGES PN 266-0016-507 ARE CRACKING AT THE GUIDE ROD FEED THROUGHS. THIS DISCREPANCY HAS BEEN OBSERVED ON THE FOLLOWING N620JF, 60-074, N114PJ, 60-114, N600GG 60-115, N91772 60-053, N60UU 60-007, N603SC 60-096, N415NP 60-024, N43NR 60-043, N601GG 60-192. AFTER INSTALLING THE NEW REPLACEMENT SUPPORT BEAM PN 288-0019-1 WE HAVE DISCOVERED NO CRACKS AT THE GUIDE ROD FEED THROUGHS