Overview
The aft fuselage is found between FS621.78 to FS669.76. It includes the aft pressure bulkhead, baggage area and baggage door. The aft fuselage is assembled from sheet metal skins made stronger with stringers and machined frames. It also has the surround structure for the baggage door. The aft fuselage includes the support structure for the aft fuselage floor and the keel beam.
The aft fuselage floor is between FS635.65 and FS669.75. The floor support structure is made from lateral and longitudinal beams which are connected to each other. The lateral beams attach to the fuselage frames and to aluminum-alloy floor posts. The longitudinal floor beams and floor posts are installed at LBL4.50, LBL13.5, LBL26.25, RBL4.50, RBL13.5 and RBL26.25.
There is a shear web on part of the floor to make the structure stronger. The shear web is made from aluminum alloy and attaches to the floor structure with rivets. There are lightening holes in the web to decrease weight.
There is shear web between FS642.50 and FS669.75 from BL26.25 to the external skin on the left and right sides of the aircraft. The shear web is also between LBL26.25 and RBL26.25 from FS661.75 to FS669.75.
Aft Fuselage
The skins are made from formed aluminum-alloy sheets and made stronger with stringers and frames. There is a latch door for the maintenance of the oxygen system on the right side.
The stringers are made from extruded T-sections. They extend the full length of the aft fuselage but keep an opening for the baggage door. There are three frames found at FS635.65, FS641.75 and FS653.00. The two sides of the frame at FS635.65 are made from machined aluminum-alloy. The frame at FS641.75 is made stronger to make the structure more rigid at the opening of the baggage door. It is cut away locally to give sufficient space for the T-section stringers.
The surround structure for the baggage door extends between FS635.65, FS669.76, STGR11L and STGR17L. The frames at FS641.75 and FS669.76 are the forward and the aft parts of the door opening. Fuselage latch fittings and fuselage stop fittings for the baggage door are installed on those frames. The sill is made from machined aluminum alloy and attaches to the fuselage frames. The area around the door opening is made stronger with angles, gussets and doublers.
The support structure for the aft fuselage floor extends from FS640.50 to FS669.76. The support structure is made from longitudinal beams which are connected to the lateral beam. This machined lateral beam attaches to the frame at FS653.00. The six longitudinal beams attach to the vertical beams of the pressure bulkhead at LBL4.50, RBL4.50, LBL13.50, RBL13.50, LBL26.50 and RBL26.50.
The aft pressure bulkhead is found at FS669.76 and seals the aft end of the fuselage pressurized zone. This also divides the baggage area from the aft equipment compartment. The aft pressure bulkhead includes eight vertical beams, one horizontal beam and six cross beams. The eight machined vertical beams are attached to the intercostals at LBL4.50, RBL4.50, LBL13.50, RBL13.50, LBL20.50, RBL20.50, LBL26.50 and RBL26.50. One machined horizontal beam is found at WL115.60 and attaches to the two sides at STGR11L and STGR11R. Six cross-beams extend from BL26.50 to the left and right side of the fuselage skin panels.
The keel beam is made from two channel section machined fittings, one skin plate and three machined clips and extends from FS642.67 to FS688.45. The keel beam attaches to the lower skin, stringers and frames at BL0.00. It also attaches to the aft keel beam of the center fuselage at FS642.67.
12/22/15
Aft Fuselage Floor
The aft fuselage floor includes:
Aft Fuselage Floor-Panels
The aft fuselage floor-panels are made from a graphite prepreg on a Nomex honeycomb sheet. There is a ply of glass fiber prepreg on the lower side for corrosion protection. The floor panels attach to the floor structure with screws and can be removed.
The floor panels for the aft fuselage include the area from FS629.64 to FS669.75 . The aft fuselage floor-panels extend into the remaining center fuselage floor-area from FS629.64 to FS635.65 .
The area has 4 floor panels which extend on the full length of that section. There is one center panel, two middle panels and one small panel. The middle panels are on the left and right outboard side of the center panel. The small panel is on the left outboard side of the left middle panel. There is no small panel on the right outboard side of the right middle panel. This is to keep a free area in the floor for the installation of ducts.
11/06/20
Components Location Index
| Component Location Index | |||
|---|---|---|---|
| IDENT | DESCRIPTION | LOCATION | IPC REF |
| - | AFT FLOOR PANEL NO. 1 (242ARF) | ZONE(S) 242 | 53-41-01 |
| - | AFT FLOOR PANEL NO. 2 (241ALF) | ZONE(S) 241/242 | 53-41-01 |
| - | AFT FLOOR PANEL NO. 3 (241BLF) | ZONE(S) 241 | 53-41-01 |
| - | AFT FLOOR PANEL NO. 4 (241CLF) | ZONE(S) 241 | 53-41-01 |
| - | AFT FLOOR PANEL NO. 5 (242BRF) | ZONE(S) 242 | 53-41-01 |
| - | AFT FLOOR PANEL NO. 6 (241ELF) | ZONE(S) 241/242 | 53-41-01 |
| - | AFT FLOOR PANEL NO. 7 (241DLF) | ZONE(S) 241 | 53-41-01 |




