S 492-300
(9)
Put the air duct for the heater/air blower in the fuel tank through the tank access opening.
S 492-301
(10)
Bond the air duct to the airplane structure.
S 942-302
(11)
Continue to have a good flow of air through the fuel tank with the air mover until you prepare to the close the fuel tank.
(a)
Read the combustible gas indicator values every half hour or less.
S 942-303
(12)
If fuel vapors get into the fuel tank that was in a fire-safe condition, get all persons out of the fuel tank until you make sure the air in the fuel tank is in a fire-safe condition again.
S 942-304
(13)
Go into the fuel tank per the "Fuel Tank Entry" procedure to do maintenance.
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757 MAINTENANCE MANUAL
H. Fuel Tank Entry
S 912-305
WARNING:_______OBEY THE PURGING AND FUEL TANK ENTRY PRECAUTIONS. FAILURE TO OBEY THE PURGING AND FUEL TANK ENTRY PRECAUTIONS CAN CAUSE SERIOUS INJURY OR DEATH TO PERSONS AND DAMAGE TO EQUIPMENT.
(1)
Read and obey the precautions in this task: Purging and Fuel Tank Entry Precautions.
S 972-306
(2)
Complete the confined space entry permit (if it is a requirement).
S 972-307
(3)
Use the pre-entry checklist (an example is given in Figure 206).
S 492-308
(4)
Do these steps to prepare the respirators for fuel tank entry:
(a)
Use Table 203 to find out what level of respiratory protection is necessary.
(b)
If the fuel tank is in a fire-safe condition, wear a full-face respirator with an attached breathing-air supply.
WARNING: PUT ON AN APPROVED RESPIRATOR WITH ATTACHED BREATHING-AIR
_______ SUPPLY BEFORE YOU GO INTO A FUEL TANK THAT WAS FILLED WITH JP-4/JET-B FUEL. THERE IS NO HEALTH-SAFE LIMIT FOR JP-4 /JET-B WHICH CAN CONTAIN BENZENE. IT IS POSSIBLE THAT BENZENE CAUSES CANCER.
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本文链接地址：757 AMM 飞机维护手册 燃油 CHAPTER 28 - FUEL 1(50)
