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Three line aircraft maintenance technicians (amt) report about a B767-300 aircraft suddenly rolling forward after the parking brake set signal was given to the taxi-in guide. The left engine nose cowl had struck a previously positioned aircraft entry stand. Concerns raised that the parking brake handle pawl stop pin could rest against the pawl's lip rather than within the pawl's cutout; giving a false indication of full engagement.
| Attributes | |
| ACN | 1235589 |
| Time | |
| Date | 201501 |
| Local Time Of Day | 0601-1200 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | B767-300 and 300 ER |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Taxi |
| Component | |
| Aircraft Component | Cowling |
| Person 1 | |
| Function | Technician |
| Qualification | Maintenance Airframe Maintenance Powerplant |
| Person 2 | |
| Function | Technician |
| Qualification | Maintenance Airframe Maintenance Powerplant |
| Events | |
| Anomaly | Aircraft Equipment Problem Critical Deviation - Procedural Published Material / Policy Ground Event / Encounter Object |
Narrative:
After parking aircraft and setting parking brake; we shut the left engine down; then the right eng. At that point I felt the plane rock a little and looked up and saw we had moved forward. [Aircraft departure] delay. Human factors: norms and lack of awareness.
Original NASA ASRS Text
Title: Three Line Aircraft Maintenance Technicians (AMT) report about a B767-300 aircraft suddenly rolling forward after the Parking Brake set signal was given to the taxi-in guide. The Left Engine nose cowl had struck a previously positioned aircraft entry stand. Concerns raised that the Parking Brake handle pawl stop pin could rest against the pawl's lip rather than within the pawl's cutout; giving a false indication of full engagement.
Narrative: After parking aircraft and setting parking brake; we shut the left engine down; then the right Eng. At that point I felt the plane rock a little and looked up and saw we had moved forward. [Aircraft departure] delay. Human Factors: Norms and Lack of Awareness.
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.