MAINTENANCE MANUAL
LOWER FUSELAGE ACCESS PANELS
1. General
A. Description
Access panels are provided in exterior and interior surfaces to facilitate servicing, inspection and
maintenance of aircraft systems and components.
Access panels are attached to aircraft structure with fasteners. With fasteners removed, panels
completely detach from structure to allow access to system components and internal structure.
B. Nose Section Access Panels
The nose access panels are located from FS -45 thru FS 9. See Figure 1.
NUMBER NOMENCLATURE EQUIPMENT
2 Access panel Rudder control linkage
2A Access panel Rudder control linkage
5 Access panel Structural components
5A Access panel Structural components
6 Access panel Air inlet scoop
6A Access panel Air outlet scoop
7 Access panel Hydraulic power brake valve lines and fittings
8 Access panel Hydraulic power brake valve lines and electrical connectors
8A Access panel Oxygen bottle replacement gage and piping
C. Cockpit Section
The cockpit floor access panels are located from FS 3.25 - FS 92.78. See Figure 2.
NUMBER NOMENCLATURE EQUIPMENT
Hydraulic lines, primary and emergency brake pressure and
80 Panel
return lines and rudder control rods
Hydraulic lines, primary and emergency brake pressure and
80A Panel
return lines and rudder control rods
Hydraulic emergency gear down lines through forward
81 Panel
pressure bulkhead and connecting control linkage
Elevator and rudder controls, structure, windshield heat
82 Panel
de-icing controller and antenna cable
Elevator and rudder controls, structure, windshield heat
82A Panel
de-icing controller and antenna cable
83 Panel Throttle control linkage and air conditioning ducting
83A Panel Throttle control linkage and air conditioning ducting
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MAINTENANCE MANUAL
NUMBER NOMENCLATURE EQUIPMENT
84 Panel Aileron control linkage and control column
84A Panel Aileron control linkage and control column
85 Panel Flight control linkage
85A Panel Flight control linkage
Hydraulic lines ECS ducting, rudder and elevator control
86 Panel torque tubes and push-pull rods, VHF NAV and Flitefone
antenna
Hydraulic lines ECS ducting, rudder and elevator control
86 I Panel torque tubes and push-pull rods, VHF NAV and Flitefone
antenna
Hydraulic lines, ECS ducting, cabin pressure lines and
87 Panel
engine control cables
Hydraulic lines, DME 1 antenna, cabin pressure and ECS
88 Panel
lines, VHF NAV and Flitefone antenna
Flight compartment heating diffuser, oxygen lines, static air
89 Panel
lines, aileron control cables and antenna cables
Flight compartment heating diffuser, oxygen lines, static air
89A Panel
lines, aileron control cables and antenna cables
Aileron push-pull rods, static air lines, VOR and VHF
90 Panel plate
communications antenna cables
Aileron push-pull rods, static air lines, VOR and VHF
90 I Panel plate
communications antenna cables
Aileron push-pull rods, static air lines, VOR and VHF
90 II Panel plate
communications antenna cables
Oxygen and static air lines, cabin pressure vacuum regulator,
91 Panel plate
aileron push-pull control rods and ECS ducting
Oxygen and static air lines, cabin pressure vacuum regulator,
91 I Panel plate
aileron push-pull control rods and ECS ducting
Oxygen and static air lines, cabin pressure vacuum regulator,
91 II Cover
aileron push-pull control rods and ECS ducting
Oxygen and static air lines, cabin pressure vacuum regulator,
91 III Panel plate
aileron push-pull control rods and ECS ducting
Hydraulic lines, engine control cables, elevator push-pull
92 Panel plate
control rods and pressure relief outflow valves
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MAINTENANCE MANUAL
D. Cabin Floorboards
The cabin floorboards are located from FS 92.78 - FS 269.879. See Figure 3.
NUMBER NOMENCLATURE EQUIPMENT
70 Panel Check valve for emergency ditching
Hydraulic lines, ECS ducting, engine control cables, rudder
93 Panel
elevator bellcrank, anemometric lines and drain ports
94 Panel ECS ducting and engine control cables
ECS ducting, engine control cables and radar altimeter (TRX)
95 Panel
antenna
ECS distribution ducting and control, engine control cables,
96 Panel
DME No. 2 antenna and radar altimeter (receive) antenna
ECS distribution ducting and control, engine control cables,
97 Panel
DME No. 2 antenna and altimeter (receive) antenna
98 Panel Flight control push-pull rods and ECS distribution ducting
98A Panel Flight control push-pull rods and ECS distribution ducting
99 Panel Flight control push-pull rods and ECS distribution ducting
99A Panel Flight control push-pull rods and ECS distribution ducting
100 Panel Flight control push-pull rods and ECS distribution ducting
100A Panel Flight control push-pull rods and ECS distribution ducting
Flight control push-pull rods, ECS distribution ducting, aileron
101 Panel control feed through transition crank and housing and toilet
servicing lines
Flight control push-pull rods, ECS distribution ducting, aileron
101A Panel
control feed through transition crank and housing
Lens, floor aisle
126 Bulb and unit replacement
light
E. Forward Fairing Access Panels
The forward fairing access panels are located on underside of the aircraft, forward of CTS. See
Figure 4.
NUMBER NOMENCLATURE EQUIPMENT
Aileron control interconnection link, slat drive motor, aileron
trim artificial feel spring, de-ice connection and drain, aileron
3 Panel autopilot actuator, emergency exit light, antennas,
anticollision light and electrical cables / connectors for wing
systems
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MAINTENANCE MANUAL
NUMBER NOMENCLATURE EQUIPMENT
Toilet ground service, aileron control interconnection link,
emergency gear down valve, slat drive motor, emergency exit
3A Panel
light, antennas, anticollision light and electrical cables /
connectors for wing systems
9 Panel Emergency gear down selector valve
9A Panel Artificial feel spring connection
Lens, emergency
133 Bulb replacement
exit ground light
Lens, emergency
133A Bulb replacement
exit ground light
Lower strobe light
134 Bulb replacement
lens
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MAINTENANCE MANUAL
SEE DETAIL B
7 8A
SEE DETAIL A
8
6A
5A
6
5
DETAIL A
7
REF 2
2A
DETAIL B
86954H00
Nose Section Access Panels
Figure 1
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MAINTENANCE MANUAL
FS
FS 92.78
63.78
FS
3.25
FS FS FS FS FS FS
3.25 9.40 24.50 34.88 63.78 92.78
91 I 91 II 91 III
85A
91
80A 82A 84A 89A
86 I
83A
81 86 87 88
83 92
82 89
80 84
90
85
90 I
90 II
MAIN CABIN DOOR
74789H01
Cockpit and Entryway Access Panels
Figure 2
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MAINTENANCE MANUAL
FS 101A
FS 199.579
92.78
100A
99A
SEE DETAIL A 97
98A 96 101
95 100
99
93 98
94
126
70
DETAIL A 81885H00
Cabin Floorboards
Figure 3
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MAINTENANCE MANUAL
SEE DETAIL A
134
133
9A
133A
3A
DETAIL A
87331H00
Forward Fuselage Fairing Access
Figure 4
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