Narrative:

Cleared williamsport 1 arrival (fqm.FQM1) to ewr. Cleared to descend to FL290, expect FL180 at hayed. Captain flying. Apparently center cleared us to cross hayed at FL180. I did not hear this clearance and did not put FL180 in MCP altitude window. Approximately 15 mi from hayed, first officer asked if we could make it to FL180 at hayed. Next, after starting descent, first officer informed center that we would be unable to be at FL180 by hayed. ATC now cleared us to cross hayed at or below FL260 to maintain FL180.

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Original NASA ASRS Text

Title: A B737-300 FAILS TO MAKE AN ALT XING RESTR WHEN THE CAPT DOES NOT HEAR THE XING ALT ASSIGNMENT.

Narrative: CLRED WILLIAMSPORT 1 ARR (FQM.FQM1) TO EWR. CLRED TO DSND TO FL290, EXPECT FL180 AT HAYED. CAPT FLYING. APPARENTLY CTR CLRED US TO CROSS HAYED AT FL180. I DID NOT HEAR THIS CLRNC AND DID NOT PUT FL180 IN MCP ALT WINDOW. APPROX 15 MI FROM HAYED, FO ASKED IF WE COULD MAKE IT TO FL180 AT HAYED. NEXT, AFTER STARTING DSCNT, FO INFORMED CTR THAT WE WOULD BE UNABLE TO BE AT FL180 BY HAYED. ATC NOW CLRED US TO CROSS HAYED AT OR BELOW FL260 TO MAINTAIN FL180.

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.