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I've been trying to model a 737 as accurately as possible, and I've seen this door in front of the nose landing gear bay a number of times.

enter image description here

I don't know what this door leads to, and I can't find any images that face it head-on so I could possibly read what the labels on the door says. Is anyone aware of what this door does? Thanks!

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It's called the "E&E Bay," for Electronics & Equipment. Inside are a bunch of black boxes for radios, radar, computers, and so forth. The crew doesn't go there; it's for maintenance. On the walk-around, the pilot checks that the door is closed & the handle is flush, but that's it.

There are two of them, one forward of the nosewheel, another aft of it. There is a door light labeled "EQUIP" that indicates when either door is open, just like a light for each of the forward & after entry and service doors, overwing exits, and so forth. Sometimes you'll see that light come on when maintenance is working on something electronic -- running a BITE test on some computer, replacing a component, or similar.

More info here.

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  • $\begingroup$ The photo in the OP is a 737 Classic, which has a different layout from the NG. The original photo is here, which identifies it as a 737-300. A similar photo of the door in the same position on a Max-8 is here. $\endgroup$
    – Ralph J
    Dec 19, 2023 at 14:29
  • $\begingroup$ Can you share some diagram for the CL? I've one which also shows the E&E bay on a -300 aft of the NWG doors. $\endgroup$
    – mins
    Dec 19, 2023 at 14:36
  • $\begingroup$ @mins The video in the site that I linked in the answer has those, I believe. $\endgroup$
    – Ralph J
    Dec 19, 2023 at 14:42
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    $\begingroup$ @mins There are two bays. The door asked about in the OP accesses the forward one, while the door aft of the nose gear accesses the main bay. They're both referred to as "E&E bay" by crews; the maintenance techs care about which boxes are in which (obviously), but for crews, they're both doors to reach the same (sort of) thing. The video discusses both bays in this way, as well. (The Boeing graphic shows that there is the aft E&E bay, with the batteries in it, but doesn't exclude the forward bay as having other electronic things. Just not the batteries.) $\endgroup$
    – Ralph J
    Dec 19, 2023 at 15:18
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    $\begingroup$ @mins The FCOM calls the aft one "center electrical and electronic (E/E) equipment access door" and the forward one "equipment compartment access door" (both are connected to the EQUIP light on the flight deck). The video Ralph linked also lists some electrical components in the forward one (PSEU, Fuel Quantity Processor Unit and WX Radar). $\endgroup$
    – Bianfable
    Dec 19, 2023 at 16:01

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