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Two mechanics report about their efforts to remove spoiler locks by applying hydraulic pressure to the left and center hydraulic systems; then heard a loud noise.
| Attributes | |
| ACN | 938047 |
| Time | |
| Date | 201103 |
| Local Time Of Day | 0001-0600 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Aircraft 1 | |
| Make Model Name | B757-200 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Parked |
| Component | |
| Aircraft Component | Speedbrake/Spoiler |
| Person 1 | |
| Function | Technician |
| Qualification | Maintenance Airframe Maintenance Powerplant |
| Experience | Maintenance Technician 11 |
| Person 2 | |
| Function | Technician |
| Qualification | Maintenance Powerplant Maintenance Airframe |
| Experience | Maintenance Technician 3 |
| Events | |
| Anomaly | Aircraft Equipment Problem Critical Deviation - Procedural Published Material / Policy |
Narrative:
Mechanic Y and I started the work card. When attempting to remove the spoiler locks we were unable to remove them because they were jammed. I tried the manual release cam to remove [hydraulic] pressure unsuccessfully. We proceeded with the [work card] sequence. Prior to turning hydraulics on; I announced hydraulics were coming on in hangar bay. I went into the cockpit and turned the left; right and center system hydraulics on; in order to pressurize the spoilers and release the locks. I heard a loud noise and immediately turned hydraulics off.
Original NASA ASRS Text
Title: Two Mechanics report about their efforts to remove spoiler locks by applying hydraulic pressure to the Left and Center Hydraulic systems; then heard a loud noise.
Narrative: Mechanic Y and I started the work card. When attempting to remove the spoiler locks we were unable to remove them because they were jammed. I tried the manual release cam to remove [hydraulic] pressure unsuccessfully. We proceeded with the [work card] sequence. Prior to turning hydraulics on; I announced hydraulics were coming on in hangar bay. I went into the cockpit and turned the Left; Right and Center System hydraulics on; in order to pressurize the spoilers and release the locks. I heard a loud noise and immediately turned hydraulics off.
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.