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Two line mechanics report about their involvement with an inadvertent opening of main entry door 1L with the door emergency assist bottle; after taxiing a B747-400 aircraft from a maintenance pad to a terminal gate. The slide/raft did not deploy; but did came off the door. One side of the slide girt bar was attached to a cabin floor sill.
| Attributes | |
| ACN | 890077 |
| Time | |
| Date | 201005 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | B747-400 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Parked |
| Component | |
| Aircraft Component | Exterior Pax/Crew Door |
| Person 1 | |
| Function | Technician |
| Qualification | Maintenance Airframe Maintenance Powerplant |
| Person 2 | |
| Function | Technician |
| Qualification | Maintenance Powerplant Maintenance Airframe |
| Events | |
| Anomaly | Deviation - Procedural Published Material / Policy |
Narrative:
After moving a B747-400 from maintenance pad to the terminal; I was going to open door #1L and noticed the yellow 'disarm' handle was not exposed fully in the upper window. I opened the 'disarming' access door and pushed up on the handle; it would not move. I slightly moved the door 'open' handle while pushing up on the 'disarming' handle; it did not move. Thinking the door was disarmed; I applied more pressure on the door 'open' handle. After a 'pop' sound the [door 'open'] handle came up unexpectedly and the door opened with [door assist bottle] air. The slide/raft came off the door but did not deploy. Only one side of the girt bar was attached to the door sill. Aircraft was damaged.
Original NASA ASRS Text
Title: Two Line Mechanics report about their involvement with an inadvertent opening of main entry door 1L with the door emergency assist bottle; after taxiing a B747-400 aircraft from a maintenance pad to a terminal gate. The slide/raft did not deploy; but did came off the door. One side of the slide girt bar was attached to a cabin floor sill.
Narrative: After moving a B747-400 from maintenance pad to the terminal; I was going to open door #1L and noticed the yellow 'Disarm' handle was not exposed fully in the upper window. I opened the 'Disarming' access door and pushed up on the handle; it would not move. I slightly moved the door 'Open' handle while pushing up on the 'Disarming' handle; it did not move. Thinking the door was disarmed; I applied more pressure on the door 'Open' handle. After a 'pop' sound the [door 'Open'] handle came up unexpectedly and the door opened with [door assist bottle] air. The slide/raft came off the door but did not deploy. Only one side of the girt bar was attached to the door sill. Aircraft was damaged.
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.