MAINTENANCE MANUAL

WING ACCESS PANELS — MAINTENANCE PRACTICES

1. Wing Access Panels
A. General
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
systems components and internal structure.
Panels are divided into 11 distinct groups of families shown as A thru L, for each wing. Panels are
interchangeable within their family. There is a special feature on each panel to prevent incorrect
panels from being used. This feature will prevent installation of one screw.
(1) Left Wing
The left wing access includes leading edge access panels, fuel cell access panels, trailing
edge access panels, aileron access panels and winglet panel. See Figure 201.

NUMBER(1) NOMENCLATURE EQUIPMENT

Left Leading Edge Access Panels
511AL-1 Leading edge blend plenum Anti-ice tubes and temp switch
Wing anti-ice coupling, temp switch and
511BL-2 Gap band No. 1
temp sensor
511CL-3 Gap band No. 2 Wing anti-ice coupling
511DL-4 Gap band No. 3 Wing anti-ice coupling
511EL-5 Gap band No. 4 Wing anti-ice tube
511FL-6 Gap band No. 5 Wing anti-ice tube and temp switch
511GL-7 Access panel Wire harnesses and hydraulic lines
Wing inboard leading edge LBL
511LE-1 Wing anti-ice tube
64 - LBL 153
Wing inboard center leading
511LE-2 Wing anti-ice tube
edge LBL 158 - LBL 258
Wing inboard center mid
511LE-3 Leading edge LBL 266 - LBL Wing anti-ice tube
367
Wing outboard center leading
511LE-4 Wing anti-ice tube
edge LBL 373 - LBL 457
Wing outboard leading edge
511LE-5 Wing anti-ice tube
LBL 463 - LBL 534
Left Fuel Cell Access Panels
521AZ Access panel Fuel probe No. 1
521BZ Access panel Fuel probe No. 1

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NUMBER(1) NOMENCLATURE EQUIPMENT

Hopper and fuel probes No. 2, No. 3
521AB-1 Access panel
and fuel characteristics sensor
521BB-2 Access panel Bay No. 1
521CB-3 Access panel Bay No. 1
521DB-4 Access panel Fuel probe No. 4
521EB-5 Access panel Bay No. 2
521FB-6 Access panel Fuel probe No. 5
521GB-7 Access panel Fuel probe No. 7
521HB-8 Access panel Bay No. 3
521JB-9 Access panel Fuel probe No. 6
Fuel probe No. 9 and fuel temperature
521KB-10 Access panel
sensor
521LB-11 Access panel Bay No. 4
521MB-12 Access panel Fuel probe No. 8
521NB-13 Access panel Fuel probe No. 10
521PB-14 Access panel Bay No. 5
521QB-15 Access panel Fuel probe No. 11
521RB-16 Access panel Fuel probe No. 12
Fuel probe No. 13 and high level
521SB-17 Access panel
sensor
521TB-18 Access panel Fuel probe No. 15
521UB-19 Access panel Bay 7
521UB-19A Access panel Fuel vent connections
521VB-20 Access panel Fuel probe No. 14
522AB-21 Access panel Wing structure
522BB-22 Access panel Wing structure
522CB-23 Access panel Wing structure
Left Wing Trailing Edge Access Panels
541AB Access panel Hydraulic interface (flight controls)
541BB Access panel Hydraulic interface (flight controls)
541CB Access panel Hydraulic interface (flight controls)
Aileron actuator, hydraulics and electric
523AB Access panel
interface

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NUMBER(1) NOMENCLATURE EQUIPMENT

523BB Access panel Electrical harness
523CB Access panel Electrical harness
Flap actuators, spoiler actuators,
571AB Access panel
hydraulics and electric interface
Flap actuators, spoiler actuators,
571BB Access panel
hydraulics and electric interface
Flap actuators, spoiler actuators,
571CB Access panel
hydraulics and electric interface
Flap actuators, spoiler actuators,
571DB Access panel
hydraulics and electric interface
Flap actuators, spoiler actuators,
571EB Access panel
hydraulics and electric interface
Flap actuators, spoiler actuators,
571FB Access panel
hydraulics and electric interface
Aileron actuator, hydraulics and electric
523AT Access panel
interface
571AT Access panel Flap track install
Flap actuators, spoiler actuators,
571BT Access panel
hydraulics and electric interface
571CT Access panel Flap track install
Flap actuators, spoiler actuators,
571DT Access panel
hydraulics and electric interface
571ET Access panel Flap track install
Flap actuators, spoiler actuators,
571FT Access panel
hydraulics and electric interface
Left Winglet Access Panel
581AL-1 Winglet inboard leading edge Lights power coupling
581AL-2 Winglet outboard leading edge Winglet structure
(1)
Panel numbers designated with a dash are provided for ease of reference to the aircraft.

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WTBF LINE

511AL-1
571AT

511LE-1 571BT

571CT
511BL-2
571DT

511LE-2
571ET

511CL-3 571FT

511LE-3

511DL-4
FWD 523AT

511LE-4

511EL-5

511LE-5

511FL-6

581AL-1
581AL-2
VIEW LOOKING DOWN
TIL-001408

Left Wing
Figure 201 (Sheet 1 of 2)

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521AZ
WTBF
521BZ
521AB-1
541AB
541BB GROUP A
521BB-2
541CB 511GL-7 GROUP B
521CB-3
571AB GROUP C
521DB-4
571BB
521EB-5 GROUP D
571CB
521FB-6
GROUP E
571DB 521GB-7
521HB-8
571EB 521JB-9
521KB-10
571FB 521LB-11
521MB-12 GROUP F
521NB-13
521PB-14
521QB-15
523AB
521RB-16
521SB-17

523BB 521TB-18 GROUP G

521UB-19
521UB-19A FWD
523CB GROUP H
521VB-20
522AB-21
522BB-22 GROUP J
522CB-23 GROUP K
GROUP L

VIEW LOOKING UP
TIL-001409

Left Wing
Figure 201 (Sheet 2 of 2)

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(2) Right Wing

The right wing access includes leading edge access panels, fuel cell access panels, trailing
edge access panels, aileron access panels and winglet access panel. See Figure 202.

NUMBER(1) NOMENCLATURE EQUIPMENT

Right Leading Edge Access Panels
611AL-1 Leading edge blend plenum Anti-ice tubes and temp switch
611BL-2 Gap band No. 1 Wing anti-ice coupling
Wing anti-ice coupling, temp switch and
611CL-3 Gap band No. 2
temp sensor
611DL-4 Gap band No. 3 Wing anti-ice coupling
611EL-5 Gap band No. 4 Wing anti-ice tube
611FL-6 Gap band No. 5 Wing anti-ice tube and temp switch
611GL-7 Access panel Wire harnesses and hydraulic lines
Wing inboard leading edge RBL
611LE-1 Wing anti-ice tube
64 - RBL 153
Wing inboard center leading
611LE-2 Wing anti-ice tube
edge RBL 158 - RBL 258
Wing inboard center Mid
611LE-3 leading edge RBL 266 - RBL Wing anti-ice tube
367
Wing outboard center leading
611LE-4 Wing anti-ice tube
edge RBL 373 - RBL 457
Wing outboard leading edge
611LE-5 Wing anti-ice tube
RBL 463 - RBL 534
Right Fuel Cell Access Panels
621AZ Access panel Fuel probe No. 1
621BZ Access panel Fuel probe No. 1
Hopper and fuel probes No. 2, No. 3
621AB-1 Access panel
and fuel characteristics sensor
621BB-2 Access panel Bay No. 1
621CB-3 Access panel Bay No. 1
621DB-4 Access panel Fuel probe No. 4
621EB-5 Access panel Bay No. 2
621FB-6 Access panel Fuel probe No. 5
621GB-7 Access panel Fuel probe No. 7
621HB-8 Access panel Bay No. 3

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NUMBER(1) NOMENCLATURE EQUIPMENT

621JB-9 Access panel Fuel probe No. 6
Fuel probe No. 9 and fuel temperature
621KB-10 Access panel
sensor
621LB-11 Access panel Bay No. 4
621MB-12 Access panel Fuel probe No. 8
621NB-13 Access panel Fuel probe No. 10
621PB-14 Access panel Bay No. 5
621QB-1 Access panel Fuel probe No. 11
621RB-16 Access panel Fuel probe No. 12
Fuel probe No. 13 and high level
621SB-17 Access panel
sensor
621TB-18 Access panel Fuel probe No. 15
621UB-19 Access panel Bay 7
621UB-19A Access panel Fuel vent connections
621VB-20 Access panel Fuel probe No. 14
622AB–21 Access panel Wing structure
622BB–22 Access panel Wing structure
622CB–23 Access panel Wing structure
Right Wing Trailing Edge Access Panels
641AB Access panel Hydraulic interface (flight controls)
641BB Access panel Hydraulic interface (flight controls)
641CB Access panel Hydraulic interface (flight controls)
Aileron actuator, hydraulics and electric
623AB Access panel
interface
623BB Access panel Electrical harness
623CB Access panel Electrical harness
Flap actuators, spoiler actuators,
671AB Access panel
hydraulics and electric interface
Flap actuators, spoiler actuators,
671BB Access panel
hydraulics and electric interface
Flap actuators, spoiler actuators,
671CB Access panel
hydraulics and electric interface
Flap actuators, spoiler actuators,
671DB Access panel
hydraulics and electric interface

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NUMBER(1) NOMENCLATURE EQUIPMENT

Flap actuators, spoiler actuators,
671EB Access panel
hydraulics and electric interface
Flap actuators, spoiler actuators,
671FB Access panel
hydraulics and electric interface
Aileron actuator, hydraulics and electric
623AT Access panel
interface
671AT Access panel Flap track install
Flap actuators, spoiler actuators,
671BT Access panel
hydraulics and electric interface
671CT Access panel Flap track install
Flap actuators, spoiler actuators,
671DT Access panel
hydraulics and electric interface
671ET Access panel Flap track install
Flap actuators, spoiler actuators,
671FT Access panel
hydraulics and electric interface
Right Winglet Access Panel
681AR-1 Winglet inboard leading edge Lights power coupling
681AR-2 Winglet outboard leading edge Winglet structure
(1)
Panel numbers designated with a dash are provided for ease of reference to the aircraft.

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WTBF LINE

611AL-1
671AT

671BT 611LE-1

671CT
611BL-2
671DT

611LE-2
671ET

671FT 611CL-3

611LE-3

611DL-4
623AT FWD

611LE-4

611EL-5

611LE-5

611FL-6

681AR-1
681AL-2
VIEW LOOKING DOWN
TIL-001537

Right Wing
Figure 202 (Sheet 1 of 2)

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621AZ
WTBF LINE
621BZ
621AB-1
GROUP A 641AB
621BB-2 641BB
GROUP B 611GL-7 641CB
621CB-3
GROUP C 671AB
621DB-4
671BB
GROUP D 621EB-5
671CB
621FB-6
GROUP E 671DB
621GB-7
621HB-8
621JB-9 671EB

621KB-10
621LB-11 671FB
621MB-12
GROUP F
621NB-13
621PB-14
621QB-15
623AB
621RB-16
621SB-17

GROUP G 621TB-18
621UB-19 623BB
621UB-19A
GROUP H 621VB-20 623CB
FWD 622AB-21
GROUP J 622BB-22
GROUP K
622CB-23
GROUP L

VIEW LOOKING UP TIL-001538

Right Wing
Figure 202 (Sheet 2 of 2)

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