Passage to Iron's office is a location featured in , Resident Evil 2 , and Resident Evil Outbreak File #2 where it is known as the Resident Evil: The Darkside Chronicles Art room corridor (. 美術室前廊下 Bijutsu-shitsu zen rōka) This hallway that connects  Chief's room to the rest of the Raccoon Police Station.
The rubble from the helicopter blocks access to Chief's room and a fire is also started as a result of the crash.
Resident Evil 2 Edit
Claire Redfield and Leon Kennedy enter the police station, a rescue helicopter crashes on the rooftop of the precinct. Claire and Leon have to put out the fire with the valve handle in order to gain access to the Art room. Once Claire obtains the bomb and detonator, she can clear out the wreckage blocking the passage to Chief's room. Leon will not have access to Chief's room until the B scenario.
Darkside Chronicles Edit
the last room, the T-00 can now be shot and downed as soon as the camera is on him. He needs to be downed twice in order to progress.
The wall that leads to
Chief's room is already blown up in this iteration, the player only needs to shoot the fire sprinkler in order to proceed.
To the right of the helicoper there is
Shotgun ammo that can be picked up as soon as the room is entered, and right next to the Chief's room, there is a Herb sitting to the right of the door.
Resident Evil 2
Crashed helicopter (Leon)
Both the helicopter and door are destroyed. It doesn't look like it's possible to get to the other side.
Crashed helicopter (Claire)
The door is broken. I can't go any further. There's no choice but to take out the wall.
↑ Tahara (ed.),
Official Guide Book, p.81.