I finished machine-countersinking forward-fuselage parts:
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEji3GdY0fgxU5ZKMpggqj3VMqrJVugmzhdhCiEY-HAiqHDLhm26-SueqVt7HTSIHYn8eO9bqIUCmdgGtYD-59vSGafqap0bW06JLUyzQCEIgxA0bDwK3qnZBAxjF4C84NaJirqvE53-tVE/s640/IMG_20181027_185903.jpg) |
Machine-countersunk center section side plates |
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjGTKIdv_OA0q0TLV3_x7sFMYA6P4b2sZEX02eBqdM3BliqPPps_mantYqLIpQtDCM94L_mXLFn43GHfEFwXT02iSpSWGjRH324HLdKFrz3Sl_flB0CCvK74vjkeZ6BBRPso8XJElAD0sk/s640/IMG_20181027_185918.jpg) |
Machine-countersunk fuel valve flange brackets |
I then continued to installing the tunnel inspection panel - this starts by drilling the rivet holes onto the tunnel rib:
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhMEJfcGsyqeWtf_jbrIlWINbvqnqV6ubLJ39pCnmcqCYnqJxpgXcYJ9DlbGlfVwq8r2mGSCYZlzMLW_6YRg6sGvTl65RnP2N86xazbYwJZ53aaNT-SKQO7kO-FdbrM0UyG7f3v1fWcYcc/s640/IMG_20181027_203110.jpg) |
Tunnel inspection panel rivet holes match-drilled |
then marking and cutting the rib for the panel:
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi5mT5dd1EPmGlXcnbIw2z6jF7ZpumGaHfboRPaBzUhUDTR69yb6Qb3pBbi45_e2PPAzvbVPdP18SObbyXKQLzZH_67h87coKw9L9fSUVWH9p01tAZwkAZ5FBxaES5NXEqVSczJcMkGx1Q/s640/IMG_20181027_204333.jpg) |
Tunnel rib with corners of panel opening drilled out |
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgnUMdZJEHSnc60uK0gxL0f7C1Pk2-blpwlzHHKaLGcrSj9OR2el_tdjqgQa9euXcwiv4Gy08rXX6kXUnduM2HLpU1UpHEmcXqEnheAi4H6LmIYxwk5CrT5aELO2Ahhqkox2T6aA06Do1Q/s640/IMG_20181027_210157.jpg) |
Cutting edges of the tunnel rib panel opening |
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh-Q0B9piw2jb_V0ZCm4cQRN3LISXs-TbdcvqvR-WO8KuPBuHIagcZW69NGaPeI5AYyhOI-wEO8ryal2orqIGpxxiG1R-2MiH0FRetaVdY-_nRFpWv7dDl0uKGjpeSAA38v7COBGGYoPqs/s640/IMG_20181027_212358.jpg) |
Tunnel rib panel opening |
After that I trimmed the hole slightly to make sure the cover plate fit nicely over the doubler:
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEicGhyphenhyphen8Xl8y1d_VLgO4Sm2wK3EMWFG9cDlkmMVGAZ7mNyvy9FFhIZDfNX-mpbYSJdI4S1w2PFjWE2-UmzFog-45tkg8fuGUrIoI6C0-0DFAm35EH4-MOXzKlrqf6hN7g0Bp-0qNf0nkX0w/s640/IMG_20181103_163032.jpg) |
Tunnel rib with backing plate clecoed on |
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiEe_lxTVKqLUMOxG4b0Y8zcGG4FhWprBPDbRRdRSCrGKsMI4iDFro8JgLQFKSgiexBUqW_5m7x9vbzPYFGr4GtU_-lfZBYAOIO6fLpLtPgVX6wrvmjPgVKYG2PFMHvy4apWWrMwzzqgvA/s640/IMG_20181103_163057.jpg) |
Tunnel rib panel with cover plate on |
I also got some work done on some parts that are officially done as part of section 28, but not used/installed until later for some reason:
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgFnJ8t32lAEHmdW6Rhdo_Z2jfguroP_NAhCaIOXJqTh5tBP-fspz7UKj7lFrVErc2Lod8W8FtrGq9ipJa6PjCpqvUyGB3CGSQt5QyTLBcBcrsRQvJ8dWeFVqL5cVU16oZ31gL20KLRklk/s640/IMG_20181117_215223.jpg) |
Seat floor assemblies drilled, deburred and machine-countersunk. |
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh93s1HmZ7-tYR5yQpjcrOSaWlncc2hGr57eleevM1FyqBPhOgDapxVewaM53Li5rNeCs453Nl3Ozr6hkNrNJWVnI5k8y72-RIuX492n4P0oQoKcE74YUX0yXBAL37MQf6rt-6fO5-KVvI/s640/IMG_20181117_215231.jpg) |
Mid seat rail supports drilled, deburred and machine-countersunk |
With this, most of these parts are ready for primer.
Time lapse:
Total forward fuselage bulkheads and ribs time: 34.5h
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