Whilst the latest modification program calls for the replacement of many obsolete seals within the fuel system, there is still no documentation instructing tradesmen on how they can achieve 1 degree of alignment with the couplings. Latest AP information simply says "The pipe angular displacement is not to exceed 1 degree in any direction".
It has been made clear by specialist from Eaton Aerospace and QinetiQ that coupling misalignment causes stresses within the seal and results in premature fuel coupling leaks.
DV