_______ These external doors give access for maintenance and/or servicing of systems and components. Additional doors and panels are provided for inspection of the structure, etc. Information concerning: the access doors is contained in chapter 52-41-00 the service doors is contained in chapter 52-42-00

 2.
 Component Location

__________________
 A. Access Doors
 (Ref. Fig. 001)

 -
Avionics compartment fwd door 811 (zones 121, 122) (Ref. 52-41-11)

 -
Avionics compartment lateral left door 812 (zone 125) (Ref. 52-41-12)

 -
Avionics compartment lateral right door 822 (zone 126) (Ref. 52-41-13)

 -
Avionics compartment fwd door 824 (zone 128) (Ref. 52-41-14)

 -Accessory compartment access door 312AR (zone 312) (Ref. 52-41-16)
 -
APU exhaust access fairing 317AR (zone 317) (Ref. 52-41-18)

 -
APU access door 315AL (zone 315) (Ref. 52-41-21)

 -
APU access door 316AR (zone 316) (Ref. 52-41-22)

 -Maintenance door 314AR (zone 314) (Ref. 52-41-23)
 B. Service Doors
R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 401-499,
 (Ref. Fig. 002)
 **ON A/C 301-399,
 (Ref. Fig. 002A)
R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 401-499,
 -Aft lavatory service door 172AR (zone 172) (Ref. 52-42-11)
 -External power receptacle door 121AL (zone 121) (Ref. 52-42-12)
 -Fwd potable water service door 133AL (zone 133) (Ref. 52-42-13)
 -Aft potable water service door 171AL (zone 171) (Ref. 52-42-13)
 -Potable water service door 192NB (zone 192) (Ref. 52-42-14)
 -Fwd cargo compartment door control panel door 134AR (Ref. 52-42-15)
 -Aft cargo compartment door control panel door 154AR (Ref. 52-42-15)
 1EFF : ALL 1 52-40-00Page 1 1 1 Aug 01/05 1 1 1CES 1

 Access Doors
 Figure 001
 1EFF :  ALL  1  52-40-00 Page 2 
1  1  Feb 01/98
 1  1
 1CES  1

 Service Doors
 Figure 002

R 1EFF : 001-049, 051-099, 101-149, 151-199, 1 52-40-00Page 3 1201-299, 401-499, 1Aug 01/05 1 1 1CES 1

R  Service Doors 
R  Figure 002A
 1EFF :  301-399,  1  52-40-00 Page 4 
1  1  May 01/04
 1  1
 1CES  1

 - HP air ground connector door 191DB (zone 191) (Ref. 52-42-16)
 - Conditioned air connection door 191CB (zone 191) (Ref. 52-42-17)
 - Refuel/Defuel panel door 192MB (zone 192) (Ref. 52-42-18) 
R  **ON A/C 301-399, 
R  - Aft lavatory service door 172AR (zone 172) (Ref. 52-42-11) 
R  - External power receptacle door 121AL (zone 121) (Ref. 52-42-12) 
R  - Fwd potable water service door 133AL (zone 133) (Ref. 52-42-13) 
R  - Aft potable water service door 171AL (zone 171) (Ref. 52-42-13) 
R  - Fwd cargo compartment door control panel door 134AR (Ref. 52-42-15) 
R  - Aft cargo compartment door control panel door 154AR (Ref. 52-42-15) 
R  - HP air ground connector door 191DB (zone 191) (Ref. 52-42-16) 
R  - Conditioned air connection door 191CB (zone 191) (Ref. 52-42-17) 
R  - Refuel/Defuel panel door 192MB (zone 192) (Ref. 52-42-18)

 1EFF : ALL 1 52-40-00Page 5 1 1 May 01/04 1 1 1CES 1 ACCESS DOORS - DESCRIPTION AND OPERATION

________________________________________
 1. General
_______
 A. Avionics Compartment Doors 811, 812, 822, 824 (Ref. Fig. 001, 002) The doors giving access to the avionics compartment are rectangular. It is possible to open the avionics compartment forward and aft doors from the inside of the avionics compartment. These doors are fitted with inner handles connected to the locking mechanism. The hold-open mechanism of the avionics compartment doors consists of:
 -
for the forward door: a rubber mechanical stop

 -
for the lateral left door: a locking pin which engages into a rubber mechanical stop

 -
for the aft door: a ball screwjack

 -
for the lateral right door: a rubber mechanical stop. Each door has a different design. However the locking mechanism is identical on the four avionics compartment doors.

 2. Description
___________
 A. Structure
 (1)
 The access doors are made of aluminium alloy. The main structure consists of longerons to which a sheet of metal is riveted. The doors are hinged to the aircraft by means of two hinge arms.
　
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