The Airplane Factory
Manufacturing Organization
DC-SBU-003-X-X-1
Service Bulletin
Issue 1, 20/11/2015
Page no: 3
9. Remove the vertical fin so that the bolts that attach the horizontal stabiliser can be removed.
10. When looking from the back of the aircraft onto the vertical fin, the 8 bolts that attach the rear spar of the
vertical fin need to be removed in order to remove the vertical fin. The picture below illustrates which bolts
to remove. Before removing these bolts ensure the strobe light wire is disconnected.
11. Using the two 3/8” spanners, loosen and remove the 8 bolts that attach the horizontal stabiliser to the
fuselage.
12. Remove the horizontal stabiliser from the fuselage.
13. With reference to the below picture, using a 3.2 mm drill bit and pneumatic drill, de-rivet all rivets that
attach skin (4) to the fuselage as this skin in its entirety needs to be removed.
14. Once skin (4) has been removed from the fuselage, follow the line of rivets that attach rib 601 to the rest
of the fuselage, de-rivet all these rivets using a 3.2 mm drill bit and pneumatic drill.
15. With reference to the below picture, follow the line of rivets illustrated in the yellow box, de-rivet all these
rivets using a 3.2 mm drill bit and pneumatic drill. It should be noted that this has to be done on both sides
of the fuselage. The line of rivets should flow from top to bottom going from the rear of the aircraft to the
front of the aircraft in a diagonal direction. Once all the rivets that attach the rib and bracket to the
fuselage have been removed, the rib and bracket should be easily removed.
