Narrative:

After departing cos in IMC, we picked up the ATIS at den, our destination. The ATIS reported the WX at 1 SM, snow and mist, 700 ft overcast. Conditions along the route were solid IMC with moderate mixed icing. The runway in use was runway 35L/right, ILS approach. After picking up ATIS, I looked for the approach plates to runway 35L/right, while the first officer was flying. I then discovered both he and I did not have the appropriate charts to fly the ILS to runway 35L/right, or runway 34. We returned to cos. Both of us were 'new' to the west coast system and were recently issued charts. Our navigation charts were signed off as 'current' from our technical pubs department. We could have flown an ILS to runway 9, but decided it would be safer to return to cos. We had all the charts as required by revision 42. The ldep confirmed this. Our company attempted to facsimile the required charts to us upon our arrival back at cos. The flight to den was ultimately canceled. The company has since rectified the problem. Publisher sent a directive to destroy certain plates -- plates we needed daily. Days later, an attempt was made to stop people from complying with the directive.

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Original NASA ASRS Text

Title: A BE1900 FLC RETURNS AND LANDS AT COS WHEN THE PIC DISCOVERS THE CREW DOES NOT POSSESS THE APCH PLATES NEEDED FOR AN ILS INTO DEN, CO.

Narrative: AFTER DEPARTING COS IN IMC, WE PICKED UP THE ATIS AT DEN, OUR DEST. THE ATIS RPTED THE WX AT 1 SM, SNOW AND MIST, 700 FT OVCST. CONDITIONS ALONG THE RTE WERE SOLID IMC WITH MODERATE MIXED ICING. THE RWY IN USE WAS RWY 35L/R, ILS APCH. AFTER PICKING UP ATIS, I LOOKED FOR THE APCH PLATES TO RWY 35L/R, WHILE THE FO WAS FLYING. I THEN DISCOVERED BOTH HE AND I DID NOT HAVE THE APPROPRIATE CHARTS TO FLY THE ILS TO RWY 35L/R, OR RWY 34. WE RETURNED TO COS. BOTH OF US WERE 'NEW' TO THE WEST COAST SYS AND WERE RECENTLY ISSUED CHARTS. OUR NAV CHARTS WERE SIGNED OFF AS 'CURRENT' FROM OUR TECHNICAL PUBS DEPT. WE COULD HAVE FLOWN AN ILS TO RWY 9, BUT DECIDED IT WOULD BE SAFER TO RETURN TO COS. WE HAD ALL THE CHARTS AS REQUIRED BY REVISION 42. THE LDEP CONFIRMED THIS. OUR COMPANY ATTEMPTED TO FAX THE REQUIRED CHARTS TO US UPON OUR ARR BACK AT COS. THE FLT TO DEN WAS ULTIMATELY CANCELED. THE COMPANY HAS SINCE RECTIFIED THE PROB. PUBLISHER SENT A DIRECTIVE TO DESTROY CERTAIN PLATES -- PLATES WE NEEDED DAILY. DAYS LATER, AN ATTEMPT WAS MADE TO STOP PEOPLE FROM COMPLYING WITH THE DIRECTIVE.

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.