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A DHC8-200 with reported #1 engine oil leak. Found the angle gear box breather tube incorrectly installed. Corrected line installation.
| Attributes | |
| ACN | 699775 |
| Time | |
| Date | 200606 |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | agl single value : 0 |
| Aircraft 1 | |
| Controlling Facilities | tower : las.tower |
| Operator | common carrier : air carrier |
| Make Model Name | Dash 8-200 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : maintenance |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| Qualification | technician : powerplant technician : airframe |
| ASRS Report | 699775 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| Events | |
| Anomaly | aircraft equipment problem : critical maintenance problem : improper maintenance maintenance problem : improper documentation non adherence : published procedure non adherence : far |
| Independent Detector | other flight crewa |
| Resolutory Action | none taken : detected after the fact |
| Consequence | other other |
| Factors | |
| Maintenance | contributing factor : schedule pressure performance deficiency : non compliance with legal requirements performance deficiency : testing performance deficiency : logbook entry performance deficiency : installation performance deficiency : inspection |
| Supplementary | |
| Problem Areas | Environmental Factor Maintenance Human Performance Aircraft |
| Primary Problem | Maintenance Human Performance |
Narrative:
Aircraft arrived in ZZZ from ZZZ1 on flight at XA35. On preflight; the new crew found and wrote up an oil leak on #1 engine. Maintenance was called and upon inspection found oil leaking from the starter generator garlock and the area near the angle gear box breather tube assembly. Further inspection revealed the breather tube not installed correctly. The angle gear box has 2 studs that go through a flange on the breather tube and the tube is secured by 2 nuts. On this engine the top mounting point was secured properly but at the bottom mounting point the stud on the angle gear box was not going through the hole and was outside of the mounting flange. The outside edge of the mounting flange was up against the side of the lower stud and its respective nut was tightened down on a small portion of the flange.
Original NASA ASRS Text
Title: A DHC8-200 WITH RPTED #1 ENG OIL LEAK. FOUND THE ANGLE GEAR BOX BREATHER TUBE INCORRECTLY INSTALLED. CORRECTED LINE INSTALLATION.
Narrative: ACFT ARRIVED IN ZZZ FROM ZZZ1 ON FLT AT XA35. ON PREFLT; THE NEW CREW FOUND AND WROTE UP AN OIL LEAK ON #1 ENG. MAINT WAS CALLED AND UPON INSPECTION FOUND OIL LEAKING FROM THE STARTER GENERATOR GARLOCK AND THE AREA NEAR THE ANGLE GEAR BOX BREATHER TUBE ASSEMBLY. FURTHER INSPECTION REVEALED THE BREATHER TUBE NOT INSTALLED CORRECTLY. THE ANGLE GEAR BOX HAS 2 STUDS THAT GO THROUGH A FLANGE ON THE BREATHER TUBE AND THE TUBE IS SECURED BY 2 NUTS. ON THIS ENG THE TOP MOUNTING POINT WAS SECURED PROPERLY BUT AT THE BOTTOM MOUNTING POINT THE STUD ON THE ANGLE GEAR BOX WAS NOT GOING THROUGH THE HOLE AND WAS OUTSIDE OF THE MOUNTING FLANGE. THE OUTSIDE EDGE OF THE MOUNTING FLANGE WAS UP AGAINST THE SIDE OF THE LOWER STUD AND ITS RESPECTIVE NUT WAS TIGHTENED DOWN ON A SMALL PORTION OF THE FLANGE.
Data retrieved from NASA's ASRS site as of January 2009 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.