What was found
WHILE IN CRUISE FLIGHT APU RPM AND GENERATOR FREQUENCY INDICATIONS WERE OUTSIDE ACCEPTABLE LIMITS. FLIGHT RETURNED TO OMAHA. MAINTENANCE ADJUSTED FUEL CONTROL UNIT.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
WHILE IN CRUISE FLIGHT APU RPM AND GENERATOR FREQUENCY INDICATIONS WERE OUTSIDE ACCEPTABLE LIMITS. FLIGHT RETURNED TO OMAHA. MAINTENANCE ADJUSTED FUEL CONTROL UNIT.