As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DIVERTED, ACFT WAS GROUNDED. DURING A MX FERRY FLIGHT, FUMES WERE NOTED IN THE CABIN, ONE OF THE 2 MECHANICS ON BOARD UTILIZED CABIN O2 & THE FLIGHT CREW DECLARED AN EMER & DIVERTED. THE ACFT LANDED SAFELY & TAXIED TO THE GATE. FOUND THE RT MLG DOOR BYPASS VLV PRESS LINE LEAKING & THE FLUID WAS ENTERING THE PACK INTAKE. REPAIRED THE PRESSURE LINE IAW AMM 20-23-11-300-004-A. REPLACED THE REPAIRED LINE WITH A NEW SERVICEABLE LINE IAW AMM 20-23-11 & ACCOMPLISHED SATISFACTORY OPERATIONAL CHECK IAW AMM 32-31-00.