As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS NOT GROUNDED. FOUND ACT 1 VERY SLOW TO TRANSFER. SUSPECT PRESSURE ISSUE. NEED TO VERIFY THAT TANK 1 ISN'T VENTING OUT OF WING NACA DUCT. REPLACED ACT ASSEMBLY TANK PER 28-28-00-710-001-A & 004-A. NORMAL TRANSFER RATES RESTORED.