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While replacing an unserviceable air driven generator (air driven generator) on a crj-200; a mechanic reports the spinner was damaged; when performing the air driven generator ejection jack travel measurements. He and another technician failed to notice the air driven generator door control rod had repositioned; even though the rod was disconnected; obstructing the spinner.
| Attributes | |
| ACN | 836136 |
| Time | |
| Date | 200905 |
| Local Time Of Day | 1201-1800 |
| Aircraft 1 | |
| Make Model Name | Regional Jet CL65 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Parked |
| Component | |
| Aircraft Component | DC Ram Air Turbine |
| Person 1 | |
| Function | Technician |
| Qualification | Maintenance Powerplant Maintenance Airframe |
| Person 2 | |
| Function | Inspector |
| Qualification | Maintenance Powerplant Maintenance Airframe |
| Events | |
| Anomaly | Aircraft Equipment Problem Critical |
Narrative:
While replacing an unserviceable air driven generator assembly the spinner was damaged when performing the air driven generator ejection jack travel measurement. To take the ejection jack stowed measurement the air driven generator is stowed with the door actuator control rod disconnected to provide access for recording dimensions of travel. To stow the air driven generator; one technician must stand above the open air driven generator door to operate the stow pump. This is the operation that I was performing when the damage occurred. The second technician was below assisting the air driven generator. Prior to performing the task I had replied about clearances of door mechanism when disconnected and second technician replied that area was clear the mechanism; was positioned out of way and to proceed. During the stowing procedure; the door control rod repositioned and obstructed the spinner of air driven generator; contacting it and causing damage.by following the procedure for stowing the air driven generator; for measurement of the travel for the ejection jack; the door control rod assembly should be secured by means of safety.
Original NASA ASRS Text
Title: While replacing an unserviceable air driven generator (ADG) on a CRJ-200; a Mechanic reports the spinner was damaged; when performing the ADG ejection jack travel measurements. He and another Technician failed to notice the ADG door control rod had repositioned; even though the rod was disconnected; obstructing the spinner.
Narrative: While replacing an unserviceable ADG assembly the spinner was damaged when performing the ADG ejection jack travel measurement. To take the ejection jack stowed measurement the ADG is stowed with the door actuator control rod disconnected to provide access for recording dimensions of travel. To stow the ADG; one Technician must stand above the open ADG door to operate the stow pump. This is the operation that I was performing when the damage occurred. The second Technician was below assisting the ADG. Prior to performing the task I had replied about clearances of door mechanism when disconnected and second Technician replied that area was clear the mechanism; was positioned out of way and to proceed. During the stowing procedure; the door control rod repositioned and obstructed the spinner of ADG; contacting it and causing damage.By following the procedure for stowing the ADG; for measurement of the travel for the ejection jack; the door control rod assembly should be secured by means of safety.
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.