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During an installation of a B777-200 nose landing gear (nlg) lock link; the sequence valve input lever was not positioned to the vertical (down) position prior to connecting a two piece control rod from the nlg lock link to the input lever. When the nlg was operated; the nlg wheel well doors closed while the gear was retracting.
| Attributes | |
| ACN | 922989 |
| Time | |
| Date | 201012 |
| Local Time Of Day | 1801-2400 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Environment | |
| Light | Night |
| Aircraft 1 | |
| Make Model Name | B777-200 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Parked |
| Component | |
| Aircraft Component | Nose Gear |
| Person 1 | |
| Function | Technician |
| Qualification | Maintenance Airframe Maintenance Powerplant |
| Events | |
| Anomaly | Aircraft Equipment Problem Critical |
Narrative:
During the installation of the nose landing gear (nlg) lock link; the sequence valve rod and idler were incorrectly connected to the gear operated sequence valve. When the landing gear was operated; the nlg wheel well doors closed while the gear was retracting. The landing gear struck and damaged the doors. The input lever to the sequence valve was also damaged. While replacing the damaged sequence valve input lever; I realized that the sequence valve rod can be connected to the [sequence valve] input lever two different ways.
Original NASA ASRS Text
Title: During an installation of a B777-200 Nose Landing Gear (NLG) Lock Link; the sequence valve input lever was not positioned to the vertical (down) position prior to connecting a two piece control rod from the NLG lock link to the input lever. When the NLG was operated; the NLG wheel well doors closed while the gear was retracting.
Narrative: During the installation of the Nose Landing Gear (NLG) lock link; the sequence valve rod and idler were incorrectly connected to the gear operated sequence valve. When the landing gear was operated; the NLG wheel well doors closed while the gear was retracting. The landing gear struck and damaged the doors. The input lever to the sequence valve was also damaged. While replacing the damaged sequence valve input lever; I realized that the sequence valve rod can be connected to the [sequence valve] input lever two different ways.
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.