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A small plane mechanic misunderstood the airworthiness directive for a C172 until another shop pointed out his mistake.
| Attributes | |
| ACN | 515510 |
| Time | |
| Date | 200106 |
| Day | Fri |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | agl single value : 0 |
| Aircraft 1 | |
| Operator | general aviation : personal |
| Make Model Name | Skyhawk 172/Cutlass 172 |
| Person 1 | |
| Affiliation | other |
| Function | maintenance : technician |
| Qualification | technician : powerplant technician : inspection authority technician : airframe |
| Experience | maintenance technician : 17 |
| ASRS Report | 515510 |
| Events | |
| Anomaly | maintenance problem : improper maintenance non adherence : published procedure non adherence : far |
| Resolutory Action | none taken : detected after the fact |
| Supplementary | |
| Problem Areas | Maintenance Human Performance |
| Primary Problem | Maintenance Human Performance |
Narrative:
On original annual inspection following effective date of airworthiness directive, I misread the airworthiness directive and did not perform required inspection using lycoming msb 505B as specified in airworthiness directive. This omission continued for each annual thereafter, until discovered in a pre-purchase inspection by a local shop on a list of discrepancies given to the owner. The local shop is remedying the failure to comply with airworthiness directive 98-02-08 for the new owner. I failed to recognize that the 0320H at 160 horsepwr was in this airworthiness directive, '320 series limited to 160 horsepwr.' I give no excuse for my omission. I had a copy of the airworthiness directive sent to me as an owner of a C172L and dismissed it, as my aircraft and all other C172 aircraft I perform annual inspections on are rated at 150 horsepwr.
Original NASA ASRS Text
Title: A SMALL PLANE MECH MISUNDERSTOOD THE AIRWORTHINESS DIRECTIVE FOR A C172 UNTIL ANOTHER SHOP POINTED OUT HIS MISTAKE.
Narrative: ON ORIGINAL ANNUAL INSPECTION FOLLOWING EFFECTIVE DATE OF AIRWORTHINESS DIRECTIVE, I MISREAD THE AIRWORTHINESS DIRECTIVE AND DID NOT PERFORM REQUIRED INSPECTION USING LYCOMING MSB 505B AS SPECIFIED IN AIRWORTHINESS DIRECTIVE. THIS OMISSION CONTINUED FOR EACH ANNUAL THEREAFTER, UNTIL DISCOVERED IN A PRE-PURCHASE INSPECTION BY A LCL SHOP ON A LIST OF DISCREPANCIES GIVEN TO THE OWNER. THE LCL SHOP IS REMEDYING THE FAILURE TO COMPLY WITH AIRWORTHINESS DIRECTIVE 98-02-08 FOR THE NEW OWNER. I FAILED TO RECOGNIZE THAT THE 0320H AT 160 HORSEPWR WAS IN THIS AIRWORTHINESS DIRECTIVE, '320 SERIES LIMITED TO 160 HORSEPWR.' I GIVE NO EXCUSE FOR MY OMISSION. I HAD A COPY OF THE AIRWORTHINESS DIRECTIVE SENT TO ME AS AN OWNER OF A C172L AND DISMISSED IT, AS MY ACFT AND ALL OTHER C172 ACFT I PERFORM ANNUAL INSPECTIONS ON ARE RATED AT 150 HORSEPWR.
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.