(g)
Install the access panel 6403 for the fuel boost pump if you removed it.
(h)
Remove the flap locks from the leading edge flaps if you installed them (AMM 27-81-0/301).
WARNING: YOU MUST CAREFULLY DO THE STEPS IN THE TASK ABOVE TO REMOVE THE LE FLAP SAFETY LOCKS. THE LE FLAPS CAN MOVE QUICKLY IF YOU DO NOT REMOVE THE SAFETY CORRECTLY. THIS CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
(i)
Retract the leading edge flaps if they are extended (AMM 27-81-0/201).
WARNING: MAKE SURE THAT PERSONS AND EQUIPMENT ARE CLEAR OF THE LE AND TE FLAPS AND FLAP DRIVE MECHANISMS. THE LEADING EDGE AND THE TRAILING EDGE CONTROL SURFACES CAN EXTEND AND RETRACT QUICKLY. THIS CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
501 28-00 Sep 01/02 Page 212
STORAGE - DESCRIPTION AND OPERATION
1. General
A. Center wing fuel tanks (Fig. 1).
2. Main Wing Tanks
A. The main wing tanks (tanks No. 1 and 2) include the sealed integral wing section between front and rear spars from the wingtip surge tank inboard to the tank end rib just inboard and forward of the main landing gear.
3. Center Wing Tank
A. The center wing tank is located within the airplane fuselage, between LBBL 70.54, RBBL 70.59 and the extension of the front and rear wing spar. Two beams span between the tank No. 1 and 2 ends thereby providing three cavities for storing the fuel. The three cavities are interconnected at the top and bottom of the spanwise beams by fuel flow equalizing holes.
580
Feb 20/85 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 28-10-0 Page 1
Fuel Tank Arrangement 5C8
28-10-0 Figure 1 Aug 01/96
Page 2
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
FUEL TANKS - MAINTENANCE PRACTICES
1. General
A. This procedure contains these tasks:
(1)
Purging and Fuel Tank Entry Precautions
(2)
Purging and Fuel Tank Entry
B. If you make a decision not to do this recommended procedure, you must have an approved alternate procedure. Make sure the conditions during the purging and fuel tank entry operations give sufficient protection to the persons and equipment used in this procedure. It is possible that local fire codes and standards make it necessary to use more restrictive procedures or more procedures than those given in the subsequent steps.
C. The safety, fire and health limits in this procedure are used by Boeing at the manufacturing sites in the state of Washington. For fuel tank and confined space entry, Boeing is required to have an aircraft confined space entry program. This program is established to control the entry into confined spaces to protect the safety and health of persons who go into fuel tanks and other closed areas. Important requirements of the program include:
(1)
Identification and Warning Sign Placement
(2)
Observer Communication with Persons inside Confined Spaces
(3)
Entry Permit Requirements
(4)
Pre-entry Procedures
(5)
Entry Procedures
(6)
Emergency and Rescue Service
(7)
Training
D. It is recommended that a fuel tank entry program which complies with the local, state and national regulations be followed.
2. Purging and Fuel Tank Entry Precautions
A. General
(1)
This procedure contains the precautions you must obey before you purge and enter the fuel tanks for maintenance. This task contains these procedures:
(a)
Purging and Fuel Tank Entry - Definitions
(b)
Purging and Fuel Tank Entry -Airplane Precautions
(c)
Purging and Fuel Tank Entry - Electrical Equipment Precautions
(d)
Purging and Fuel Tank Entry - Equipment Precautions
(e)
Purging and Fuel Tank Entry - Personnel Precautions
(f)
Purging and Fuel Tank Entry - Adverse Weather Precautions
(2)
The next task, Purging and Fuel Tank Entry, contains the steps you must follow when you purge and enter a fuel tank.
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