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While performing a periodic calibration check of a torque multiplier tool; an inspector noticed the foot-pounds (ft-lbs) section of the vendor calibration chart was damaged. After printing out a new chart using his company's computer software program; he realizes the newton-meters section of the new chart had used inch-lbs instead of metric numbers for the newton values.
| Attributes | |
| ACN | 868192 |
| Time | |
| Date | 201001 |
| Local Time Of Day | 1801-2400 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Environment | |
| Light | Night |
| Aircraft 1 | |
| Make Model Name | No Aircraft |
| Person 1 | |
| Function | Inspector |
| Qualification | Maintenance Airframe Maintenance Powerplant |
| Events | |
| Anomaly | Aircraft Equipment Problem Critical |
Narrative:
Performed periodic calibration on snap-on torque multiplier tool. Unit was within tolerance as received; but the vendor calibration chart attached to the handle was damaged so that the ft-lbs (foot-pounds) output numbers are not readable. The computer has software to generate a new chart; but the newton-meter numbers for both input and output don't agree with the vendor numbers (which are still fully legible). The calibration test stand gives the exact ratio for each testpoint; so I multiplied each testpoint value by its corresponding ratio and entered product for output value.
Original NASA ASRS Text
Title: While performing a Periodic Calibration Check of a Torque Multiplier Tool; an Inspector noticed the Foot-Pounds (Ft-Lbs) section of the vendor calibration chart was damaged. After printing out a new chart using his company's computer software program; he realizes the Newton-Meters section of the new chart had used Inch-Lbs instead of metric numbers for the Newton values.
Narrative: Performed periodic calibration on Snap-On Torque Multiplier tool. Unit was within tolerance as received; but the vendor calibration chart attached to the handle was damaged so that the Ft-Lbs (Foot-Pounds) output numbers are not readable. The computer has software to generate a new chart; but the Newton-Meter numbers for both input and output don't agree with the vendor numbers (which are still fully legible). The Calibration Test Stand gives the exact ratio for each testpoint; so I multiplied each testpoint value by its corresponding ratio and entered product for output value.
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.