Narrative:

I found that the cable tensiometer TEN9004 was inaccurate on aircraft X by at least 1/5 or more on the low side when compared with 3 other tensiometers. I also used this tensiometer on aircraft Y for the ailerons and this tool was also used for the brakes and the aircraft elevators since these cables were disconnected for other maintenance. I strongly believe that this aircraft and other aircraft which this tool was used on are now not properly rigged and could pose a severe liability to both the aircraft and anyone on board.

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Original NASA ASRS Text

Title: A B757-200 WAS DISPATCHED IN NON COMPLIANCE AFTER RIGGING FLT CTL CABLES WITH AN INACCURATE TENSIOMETER READING LOW.

Narrative: I FOUND THAT THE CABLE TENSIOMETER TEN9004 WAS INACCURATE ON ACFT X BY AT LEAST 1/5 OR MORE ON THE LOW SIDE WHEN COMPARED WITH 3 OTHER TENSIOMETERS. I ALSO USED THIS TENSIOMETER ON ACFT Y FOR THE AILERONS AND THIS TOOL WAS ALSO USED FOR THE BRAKES AND THE ACFT ELEVATORS SINCE THESE CABLES WERE DISCONNECTED FOR OTHER MAINT. I STRONGLY BELIEVE THAT THIS ACFT AND OTHER ACFT WHICH THIS TOOL WAS USED ON ARE NOW NOT PROPERLY RIGGED AND COULD POSE A SEVERE LIABILITY TO BOTH THE ACFT AND ANYONE ON BOARD.

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.