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A helicopter maintenance technician reported that the balancing spring for the duel controls was not in the proper position.
| Attributes | |
| ACN | 1523945 |
| Time | |
| Date | 201801 |
| Local Time Of Day | 0601-1200 |
| Environment | |
| Light | Night |
| Aircraft 1 | |
| Make Model Name | Eurocopter AS 350/355/EC130 - Astar/Twinstar/Ecureuil |
| Component | |
| Aircraft Component | Collective Control |
| Person 1 | |
| Function | Technician |
| Qualification | Maintenance Airframe Maintenance Powerplant |
| Experience | Maintenance Technician 16 |
| Events | |
| Anomaly | Aircraft Equipment Problem Less Severe Deviation - Procedural Maintenance Deviation - Procedural Published Material / Policy Ground Event / Encounter Loss Of Aircraft Control |
Narrative:
One problem was the pilot did not put on the collective lock; the aircraft lifted again and had a hard landing seconds later.I had removed the dual controls and installed them again; and then removed them again.this was not familiar to me; I had been to a school for EC130's; but this was the first time working on an EC130 by myself. I found I only used part of the electronic manual and not all of it; because of my unfamiliarity with it. I missed the part of balancing the controls by putting the one end of the balancing spring in another position. I thought I had finished the maintenance properly. I found out later I did not via the tech rep. The spring tension/position may have been a factor in the aircraft becoming airborne and then landing again hard.I see where I could have done a better job; but I had difficulty with both the tech manual site and electronic tech manuals due to my inexperience. I also had asked my company bosses for more training before the helicopter arrived. I was also working at night and was tired. Just from being up at night. I usually work days.
Original NASA ASRS Text
Title: A Helicopter Maintenance Technician reported that the balancing spring for the duel controls was not in the proper position.
Narrative: One problem was the pilot did not put on the collective lock; the aircraft lifted again and had a hard landing seconds later.I had removed the dual controls and installed them again; and then removed them again.This was not familiar to me; I had been to a school for EC130's; but this was the first time working on an EC130 by myself. I found I only used part of the electronic manual and not all of it; because of my unfamiliarity with it. I missed the part of balancing the controls by putting the one end of the balancing spring in another position. I thought I had finished the maintenance properly. I found out later I did not via the tech rep. The spring tension/position may have been a factor in the aircraft becoming airborne and then landing again hard.I see where I could have done a better job; but I had difficulty with both the tech manual site and electronic tech manuals due to my inexperience. I also had asked my company bosses for more training before the helicopter arrived. I was also working at night and was tired. Just from being up at night. I usually work days.
Data retrieved from NASA's ASRS site 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.