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Several cessna twin piston aircraft with overhauled engines were started and run for break-in with uncalibrated aircraft instrumentation.
| Attributes | |
| ACN | 455953 |
| Time | |
| Date | 199911 |
| Day | Mon |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | agl single value : 0 |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Operator | general aviation : corporate |
| Make Model Name | Cessna Twin Piston Undifferentiated or Other Model |
| Operating Under FAR Part | Part 91 |
| Flight Phase | ground : maintenance ground : parked |
| Flight Plan | None |
| Person 1 | |
| Affiliation | other |
| Function | maintenance : technician |
| Qualification | technician : inspection authority technician : powerplant technician : airframe |
| Experience | maintenance technician : 10 |
| ASRS Report | 455953 |
| Events | |
| Anomaly | aircraft equipment problem : critical maintenance problem : improper maintenance non adherence : published procedure |
| Resolutory Action | none taken : unable |
| Consequence | faa : investigated other |
| Factors | |
| Maintenance | performance deficiency : inspection performance deficiency : testing |
| Supplementary | |
| Problem Areas | Maintenance Human Performance Aircraft |
| Primary Problem | Maintenance Human Performance |
Narrative:
I mistakenly used aircraft instrumentation for the start-up and break-in of overhauled aircraft engines. The aircraft engines were overhauled, but the gauges were not calibrated. Callback conversation with reporter revealed the following information: the reporter stated that several cessna light twin aircraft with newly overhauled engines were started and run for break-in without the aircraft engine instruments being calibrated. The reporter said it was a manufacturer's requirement that the aircraft engine instruments be calibrated before engine start. The reporter stated the FAA has contacted the reporter.
Original NASA ASRS Text
Title: SEVERAL CESSNA TWIN PISTON ACFT WITH OVERHAULED ENGS WERE STARTED AND RUN FOR BREAK-IN WITH UNCALIBRATED ACFT INSTRUMENTATION.
Narrative: I MISTAKENLY USED ACFT INSTRUMENTATION FOR THE START-UP AND BREAK-IN OF OVERHAULED ACFT ENGS. THE ACFT ENGS WERE OVERHAULED, BUT THE GAUGES WERE NOT CALIBRATED. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATED THAT SEVERAL CESSNA LIGHT TWIN ACFT WITH NEWLY OVERHAULED ENGS WERE STARTED AND RUN FOR BREAK-IN WITHOUT THE ACFT ENG INSTS BEING CALIBRATED. THE RPTR SAID IT WAS A MANUFACTURER'S REQUIREMENT THAT THE ACFT ENG INSTS BE CALIBRATED BEFORE ENG START. THE RPTR STATED THE FAA HAS CONTACTED THE RPTR.
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.