HOLDING PROC -- ACR ENTERS THE HOLDING PATTERN INCORRECTLY DUE TO IMPROPER FMC INPUTS.

Narrative

FLT WAS INBOUND TO SDF. AS A RESULT OF TSTM ACTIVITY AT THE ARPT AND SURROUNDING AREA; OUR FLT WAS GIVEN VECTORS AND CLRNCS TO 2 DIFFERENT FIXES. MYSTIC (MYS) VOR; (SW OF SDF) AND CHERI INTXN (NW OF SDF) ON THE IIU 279 DEG RADIAL; 45 DME; WE WERE INBOUND FROM THE W AND WERE FINALLY CLRED BACK TO CHERI; MAINTAIN 250 KTS. WITHIN 20 MI OF CHERI A HOLDING CLRNC WAS RECEIVED TO 'HOLD AS PUBLISHED.' (NON-STANDARD PATTERN) THE ACFT IS EQUIPPED WITH DUAL FMC'S. HOLDING PATTERN WAS BUILT ON THE FMC/EFIS DISPLAY; BUT A STANDARD (R TURNS) HOLDING PATTERN WAS DISPLAYED. DUE TO THE WX; PRECIPITATION AND TURB; I WAS BUSY FLYING THE AIRPLANE (250 KIAS; REDUCING TO 210 KTS FOR HOLD) AT 11000 FT; WIND OUT OF THE W AT ABOUT 30 KTS. GS DISPLAYED ABOUT 290 KTS TO 240 KTS. I DID NOT GET A CHANCE TO VERIFY THE PNF'S ENTRY AND THEREFORE EXECUTED A PARALLEL ENTRY INTO THE HOLDING PATTERN RATHER THAN THE 'AIM' RECOMMENDED ENTRY 'DIRECT ENTRY.' I DISCOVERED THE ERROR ON THE OUTBOUND LEG OF THE ENTRY TO THE HOLD AND RE-ENTERED THE CORRECT HOLDING PATTERN. AS WE TURNED INBOUND TO THE FIX TO BEGIN THE FIRST TURN INTO THE HOLD; ATC ISSUED RADAR VECTORS TO US AND OTHER ACFT FOR SEQUENCING INTO SDF. THEREFORE; WE NEVER WERE ESTABLISHED IN THE HOLDING PATTERN. NO COMMENT OR ADVISORY WAS MADE BY SDF APCH AND NO TFC WAS EVER CALLED US. AS FAR AS I KNOW; WE STAYED WITHIN THE HOLDING PATTERN PROTECTED AIRSPACE. OTHER ACFT WERE ALSO ENTERING THE HOLD AT CHERI AT HIGHER ALTS; FROM DIFFERENT DIRECTIONS; AND EXECUTING DIFFERENT ENTRIES. THE REST OF THE FLT INBOUND TO SDF WAS NORMAL; ADDITIONAL VECTORS WERE RECEIVED FROM SDF APCH; AROUND WX AND FOR SEQUENCING TO THE FINAL APCH SEGMENT.