As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ETOPS SIGNIFICANT SYS - APU BLEED AIR PRESSURE FLUCTUATES BETWEEN 5-10 PSI ON GROUND. PERFORMED BFIM 49-11-00, FIG 119 FOUND COMPRESSOR SENSE LINE AT MANIFOLD. RETORQUED LINE AND PERFORMED OPS CHECK OF APU PNEUNATICS WITH NO FLUCTUATION NOTED WITH SYSTEM LOADED OR UNLOADED.