Here the inlet of one of it's four General Electric CF6-50E2's

The Spiral was used to give a rpm indication for ground crew, there by helping them keep a certain safe distance from the engine intakes.
Jack Pad Access Access Bay:

The B747's had 4 of these Jack Pad Access Bays these were using during D-Checks & during construction of these aircraft to check if the Landing Gear functioned properly.
These Jacks made maintenance easier as well to create a proper standing height under it's belly, with these jacks they could jack the B747 to a certain height for maintenance for other belly placed parts.
Just in front of the Jack Access Bay are the two Airco Intakes and the left part of the fore section of this Classic Queen of the Skies:
Here a shot of them two Airco Intakes from the front view:
Here that lovely Golden BOEING 747 logo again but from the left side:
Then General Electric CF6-50E2's compared to the KLM Refueling Truck, just enormous, makes me wonder how big them GEnx2's are rofl..
Also a notable thing the Flap Levers had these red markings on them and only on the right wing, the later KLM B747-406M also had this but on all 4 right placed flap levers:

This was probably done for maintenance purposes so maintenance crews would not mix up with the left wing parts, just my theory of the case.
An other rear view of this aircraft:
Rear placed Cargo Doors:
Here a closeup of the APU Maintenance Hatch, which you can see in the dark blue part:
Left Horizontal Stabilizer:
Right Horizontal Stabilizer
Under Rear view of this B747-206B(M)SUD, also note the two Cabin Air Pressure Valves:
From that point I panned to the right:
Then to the left:

Showing the walkway connected to the aircraft, the refueling truck and a container as well.
This is one of my favored photo's I made during the visit, the entire landing gear shot, the nose gear can also be seen:
1 of 2 GE CF6-50E2's from the right wing:
Rear right wing view:
A last view of the Hump from the rear end:

At busier days especially in the summer the upper deck entrance is also accessible via that outer placed stairway.
Here the final photo's , these are high rest shots too
Front section:
And Aft Section:

I did it in phases per post, which was easier to split up the photo sections as well.
And there you have it 84 photo's and 4 Video's I made when I was there, mainly thanks for it not being busy with other visitors I had the best chance to make photo's without too many other people on them!
These are the best of days to make photo's when visiting any kind of museum
Many thanks for reading everyone