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A C208 had the propeller blades checked with an incorrectly fabricated wear gauge resulting in out of limits blades being checked 'ok for service.'
| Attributes | |
| ACN | 402133 |
| Time | |
| Date | 199805 |
| Day | Wed |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : zzz |
| State Reference | US |
| Altitude | agl bound lower : 0 agl bound upper : 0 |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | Caravan 1 208A |
| Operating Under FAR Part | Part 135 |
| Flight Phase | other |
| Flight Plan | None |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | other personnel other |
| Qualification | other other : other |
| ASRS Report | 402133 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | other personnel other |
| Qualification | other other : other |
| ASRS Report | 402134 |
| Events | |
| Anomaly | aircraft equipment problem : critical non adherence : published procedure non adherence : far other anomaly other |
| Independent Detector | other other : unspecified |
| Resolutory Action | none taken : detected after the fact other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | other |
Narrative:
During initial training I was briefed to use the company supplied propeller wear gauge. Propeller gauge had been used in the past for checking wear, but upon further investigation it was determined the propeller gauge being used was incorrectly fabricated, therefore during the last 2 inspections the propeller was actually below limits specified by propeller manufacturer. The cause of the problem was my failure to verify the accuracy of the company supplied propeller gauge. Callback conversation with reporter revealed the following information: the reporter stated the aircraft was not released for service after the gauge was found to be fabricated incorrectly. The reporter said the gauge was made up in the local shop and was not the manufacturer's approved tool or fixture.
Original NASA ASRS Text
Title: A C208 HAD THE PROP BLADES CHKED WITH AN INCORRECTLY FABRICATED WEAR GAUGE RESULTING IN OUT OF LIMITS BLADES BEING CHKED 'OK FOR SVC.'
Narrative: DURING INITIAL TRAINING I WAS BRIEFED TO USE THE COMPANY SUPPLIED PROP WEAR GAUGE. PROP GAUGE HAD BEEN USED IN THE PAST FOR CHKING WEAR, BUT UPON FURTHER INVESTIGATION IT WAS DETERMINED THE PROP GAUGE BEING USED WAS INCORRECTLY FABRICATED, THEREFORE DURING THE LAST 2 INSPECTIONS THE PROP WAS ACTUALLY BELOW LIMITS SPECIFIED BY PROP MANUFACTURER. THE CAUSE OF THE PROB WAS MY FAILURE TO VERIFY THE ACCURACY OF THE COMPANY SUPPLIED PROP GAUGE. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATED THE ACFT WAS NOT RELEASED FOR SVC AFTER THE GAUGE WAS FOUND TO BE FABRICATED INCORRECTLY. THE RPTR SAID THE GAUGE WAS MADE UP IN THE LCL SHOP AND WAS NOT THE MANUFACTURER'S APPROVED TOOL OR FIXTURE.
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.