Narrative:

Upon entering the terminal area; I was assigned a STAR; given a heading and instructed to descend to 6000 ft. During the descent; I pulled up the STAR on my tablet computer; but the size and orientation of the procedure on the tablet made it very difficult to read; so I decided to pull out the hard copy; which was in my flight bag in the back seat; during which time I drifted 400 ft below 6000 ft for about 30 seconds. The altitude hold feature on my autopilot was inoperative.

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Original NASA ASRS Text

Title: Unable to read the display of the STAR by which he was cleared on his EFB; the pilot of a Beechcraft Travelair suffered an altitude deviation when attempting to access his paper charts; which were in the back seat.

Narrative: Upon entering the terminal area; I was assigned a STAR; given a heading and instructed to descend to 6000 FT. During the descent; I pulled up the STAR on my tablet computer; but the size and orientation of the procedure on the tablet made it very difficult to read; so I decided to pull out the hard copy; which was in my flight bag in the back seat; during which time I drifted 400 FT below 6000 FT for about 30 seconds. The altitude hold feature on my autopilot was inoperative.

Data retrieved from NASA's ASRS site as of April 2012 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.