Air carrier flight crew reported an inadvertent slide deployment of a door during preflight procedur...

Attributes
ACN	1579587
Time
Date	201809
Local Time Of Day	0001-0600
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Light	Night
Aircraft 1
Make Model Name	Widebody Low Wing 2 Turbojet Eng
Operating Under FAR Part	Part 121
Flight Phase	Parked
Flight Plan	IFR
Component
Aircraft Component	Escape Slide
Person 1
Function	First Officer Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP) Flight Crew Multiengine Flight Crew Instrument
Person 2
Function	Pilot Not Flying Captain
Qualification	Flight Crew Instrument Flight Crew Multiengine Flight Crew Air Transport Pilot (ATP)
Events
Anomaly	Deviation - Procedural Published Material / Policy Flight Deck / Cabin / Aircraft Event Other / Unknown

Narrative:

While preparing for departure on my third leg of IOE; we had a crew consisting of myself; the captain and two rfo's (relief first officers). (One additional; since I had not met the requirements to be an independent crew member). The captain and I were in the seats having completed the pre-flight items; up to the before start checklist to the line; and were waiting for the final weight and balance data. A few moments later we received the chime for the final weight and balance data; and began to review it. The captain heard the door being closed and told the second rfo; who was in the cockpit; that he didn't want the doors closed yet. The second rfo asked if the captain wanted him to go back and stop the rfo who was closing up. The captain said yes. As the second rfo went back; I heard him say 'hold up.' the captain and I went back to looking at the final when the second rfo stuck his head in the cockpit and said 'we just blew a slide'.a few moments later the rfo who was in the supernumerary compartment came up and said 'I can't believe I just did that.' he proceeded to say that it was totally his fault; there was no malfunction and he just made a mental error.at that point the captain began contacting the appropriate people to start working the problem.

Original NASA ASRS Text

Title: Air carrier flight crew reported an inadvertent slide deployment of a door during preflight procedures.

Narrative: While preparing for departure on my third leg of IOE; we had a crew consisting of myself; the Captain and two RFO's (Relief First Officers). (One additional; since I had not met the requirements to be an independent crew member). The Captain and I were in the seats having completed the pre-flight items; up to the before start checklist to the line; and were waiting for the Final Weight and Balance data. A few moments later we received the chime for the Final Weight and Balance data; and began to review it. The Captain heard the door being closed and told the second RFO; who was in the cockpit; that he didn't want the doors closed yet. The second RFO asked if the Captain wanted him to go back and stop the RFO who was closing up. The Captain said yes. As the second RFO went back; I heard him say 'hold up.' The Captain and I went back to looking at the final when the second RFO stuck his head in the cockpit and said 'we just blew a slide'.A few moments later the RFO who was in the supernumerary compartment came up and said 'I can't believe I just did that.' He proceeded to say that it was totally his fault; there was no malfunction and he just made a mental error.At that point the Captain began contacting the appropriate people to start working the problem.

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.