A B747-400 FREIGHTER CREW PIC AND RELIEF PLT ALLOWS NEWLY RATED DEADHEADING CREW MEMBERS TO ALTERNATELY OCCUPY THE OPERATING CREW SEATS DURING A TRANSATLANTIC CARGO OP FROM LAX TO LUX.

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WHILE OPERATING AS AN INTL RELIEF OFFICER ON A B747-400 CARGO ACFT DURING A 10 HR 15 MIN FLT; THE OPERATING SEATS WERE OCCUPIED AT VARIOUS TIMES BY 1 OR MORE OF 3 DEADHEADING CREW MEMBERS WHO HAD RECENTLY RECEIVED THEIR TYPE RATING IN THE B747-400. ALL 4 OPERATING CREW AND ALL 3 DEADHEADING CREW WERE IN UNIFORM WITH IDENT CARDS AND ALL PAPERWORK SHOWED ALL 7 CREW MEMBERS ON THE ACFT. SOME OF THE OPERATING CREW ARRIVED FOR DUTY NOT FULLY RESTED; SO ALL 7 CREW MEMBERS TOOK TURNS IN THE OPERATING SEATS. NO OPDEVS WERE EXPERIENCED. AS A RESULT; 1 OR MORE OF THE OPERATING CREW MAY HAVE BEEN IN BETTER PHYSIOLOGICAL CONDITION FOR APCH AND LNDG; BOTH OF WHICH WERE ACCOMPLISHED ROUTINELY. REST REQUIREMENTS ON LONG NIGHT FLT ORIGINATING AT XA00. SOMEONE APPARENTLY RECHKED THE RELEVANT REG AND ARRIVED AT A DIFFERENT INTERP. FATIGUE. EXPLICIT COMPANY COM PROHIBITING ALMOST FULLY QUALIFIED PLTS FROM OCCUPYING OPERATIONAL SEATS IN CRUISE AS OBSERVERS; AND ADJUSTING PLANNING AND SCHEDULING GUIDELINES TO EMPHASIZE OPERATIONAL EXPERIENCE IMMEDIATELY AFTER COMPLETION OF TYPE RATING RIDES. CRM NOT USED. DESIGNATE ADDITIONAL CHK CAPTS AND ACCELERATE IOE. POOR DIRECTION/COM.