Narrative:

The shead 7 departure requires five altitude restrictions on successive waypoints right after departure. The first is at 7;000 MSL; and the second is at 9;000 MSL. I misread the waypoint name and commenced the climb from the 7;000 ft initial level off to the next altitude (9;000) one waypoint early. The controller noticed it and asked when I was at about 7;700 ft; before clearing me unrestricted to FL190. My mistake; but a SID design that requires aircraft without VNAV to rapidly scan back and forth from closely spaced waypoints during the busy initial climb; fly the airplane and communicate with two ATC sectors; is flawed. In retrospect; I should have requested the mccarran 3; which has a more conventional pilot workload.

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Original NASA ASRS Text

Title: A pilot who departed on the LAS SHEAD 7 RNAV without an FMS became very busy so that he transposed waypoints and began a climb to 9;000 FT before passing POPPR.

Narrative: The SHEAD 7 Departure requires five altitude restrictions on successive waypoints right after departure. The first is at 7;000 MSL; and the second is at 9;000 MSL. I misread the waypoint name and commenced the climb from the 7;000 FT initial level off to the next altitude (9;000) one waypoint early. The Controller noticed it and asked when I was at about 7;700 FT; before clearing me unrestricted to FL190. My mistake; but a SID design that requires aircraft without VNAV to rapidly scan back and forth from closely spaced waypoints during the busy initial climb; fly the airplane and communicate with two ATC sectors; is flawed. In retrospect; I should have requested the McCarran 3; which has a more conventional pilot workload.

Data retrieved from NASA's ASRS site as of July 2013 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.