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A B757-200 captain reports on external preflight of aircraft the left landing gear door was open for a maintenance repair. Cockpit checklist was complete and the hydraulic pumps were turned on. Technician advised depressurize hydraulics due to component caught in door.
| Attributes | |
| ACN | 705528 |
| Time | |
| Date | 200608 |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | agl single value : 0 |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | B757-200 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : preflight |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| ASRS Report | 705528 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Events | |
| Anomaly | aircraft equipment problem : critical maintenance problem : improper maintenance maintenance problem : improper documentation non adherence : far non adherence : published procedure |
| Independent Detector | other other : 3 |
| Resolutory Action | none taken : detected after the fact |
| Consequence | other |
| Factors | |
| Maintenance | performance deficiency : non compliance with legal requirements |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance Maintenance Human Performance |
| Primary Problem | Ambiguous |
Narrative:
During the external preflight of the aircraft; I observed the left landing gear door was open. The aircraft was scheduled for service and repair of a maintenance item. I believed maintenance had manually opened the door to service/inspect the area. As the aircraft was prepared for pushback; the hydraulic pumps were turned on and the checklist completed. A mechanic called on the interphone to inform of a metal component was caught in the seam of the left landing door. I depressurized the hydraulic system and the left door opened. A support strut had broken and prevented the door from engaging the uplock. There was no visible damage to the door area.
Original NASA ASRS Text
Title: A B757-200 CAPT RPTS ON EXTERNAL PREFLT OF ACFT THE L LNDG GEAR DOOR WAS OPEN FOR A MAINT REPAIR. COCKPIT CHKLIST WAS COMPLETE AND THE HYD PUMPS WERE TURNED ON. TECHNICIAN ADVISED DEPRESSURIZE HYDS DUE TO COMPONENT CAUGHT IN DOOR.
Narrative: DURING THE EXTERNAL PREFLT OF THE ACFT; I OBSERVED THE L LNDG GEAR DOOR WAS OPEN. THE ACFT WAS SCHEDULED FOR SVC AND REPAIR OF A MAINT ITEM. I BELIEVED MAINT HAD MANUALLY OPENED THE DOOR TO SVC/INSPECT THE AREA. AS THE ACFT WAS PREPARED FOR PUSHBACK; THE HYD PUMPS WERE TURNED ON AND THE CHKLIST COMPLETED. A MECH CALLED ON THE INTERPHONE TO INFORM OF A METAL COMPONENT WAS CAUGHT IN THE SEAM OF THE L LNDG DOOR. I DEPRESSURIZED THE HYD SYS AND THE L DOOR OPENED. A SUPPORT STRUT HAD BROKEN AND PREVENTED THE DOOR FROM ENGAGING THE UPLOCK. THERE WAS NO VISIBLE DAMAGE TO THE DOOR AREA.
Data retrieved from NASA's ASRS site as of January 2009 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.