Narrative:

I was cleared direct to gering LOM to hold northwest, maintain 7300 ft. As soon as I turned inbound, established in the hold, ZDV cleared me for the approach to runway 12 localizer back course. The unusual part of this clearance was for me to maintain 7300 ft till gering. Instead of asking ATC of their exact intentions, I switched to the CTAF since I was not cleared to descend to the lower published altitude once established inbound, but instead, told to maintain my present altitude till the FAF. I felt this clearance did not entail the course reversal (procedure turn) required to descend on the intermediate approach course. I instead completed the approach from my position 9.5 DME from bff established on the intermediate approach course. Since I was given an altitude restr till the FAF that was higher than the published intermediate approach altitude, I feel that my decision to not conduct the procedure turn was what center wanted due to aircraft waiting to depart at scottsbluff. If faced with the same conditions, I will ask ATC if they want the full approach and if not then ask for a lower altitude. When I canceled with center after landing they did not express any dissatisfaction. As with many matters of safety, better communication can go a long way to reducing the risk.

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Original NASA ASRS Text

Title: C402C ACFT WAS CLRED FOR THE LOC BACK COURSE APCH. RPTR PLT FLEW THE APCH STRAIGHT IN RATHER THAN THE DEPICTED APCH WITH A PROC TURN.

Narrative: I WAS CLRED DIRECT TO GERING LOM TO HOLD NW, MAINTAIN 7300 FT. AS SOON AS I TURNED INBOUND, ESTABLISHED IN THE HOLD, ZDV CLRED ME FOR THE APCH TO RWY 12 LOC BACK COURSE. THE UNUSUAL PART OF THIS CLRNC WAS FOR ME TO MAINTAIN 7300 FT TILL GERING. INSTEAD OF ASKING ATC OF THEIR EXACT INTENTIONS, I SWITCHED TO THE CTAF SINCE I WAS NOT CLRED TO DSND TO THE LOWER PUBLISHED ALT ONCE ESTABLISHED INBOUND, BUT INSTEAD, TOLD TO MAINTAIN MY PRESENT ALT TILL THE FAF. I FELT THIS CLRNC DID NOT ENTAIL THE COURSE REVERSAL (PROC TURN) REQUIRED TO DSND ON THE INTERMEDIATE APCH COURSE. I INSTEAD COMPLETED THE APCH FROM MY POS 9.5 DME FROM BFF ESTABLISHED ON THE INTERMEDIATE APCH COURSE. SINCE I WAS GIVEN AN ALT RESTR TILL THE FAF THAT WAS HIGHER THAN THE PUBLISHED INTERMEDIATE APCH ALT, I FEEL THAT MY DECISION TO NOT CONDUCT THE PROC TURN WAS WHAT CTR WANTED DUE TO ACFT WAITING TO DEPART AT SCOTTSBLUFF. IF FACED WITH THE SAME CONDITIONS, I WILL ASK ATC IF THEY WANT THE FULL APCH AND IF NOT THEN ASK FOR A LOWER ALT. WHEN I CANCELED WITH CTR AFTER LNDG THEY DID NOT EXPRESS ANY DISSATISFACTION. AS WITH MANY MATTERS OF SAFETY, BETTER COM CAN GO A LONG WAY TO REDUCING THE RISK.

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.