(d)  
If the fuel tank was not filled with JP-4/Jet-B and is in a health-safe condition, wear a full face respirator with an attached breathing-air supply, or at a minimum, a half-face respirator with an organic vapor filter.

 (e)  
Connect the subsequent respirators to the air supply (Fig. 204): 1) One respirator for the person who goes into the fuel tank. 2) Two emergency rescue respirators.

 (f)  
Make sure air gets to the respirators.

 (g)  
Make sure the respirator system (regulator, mask etc.) is clean.

 NOTE: When you use the respirator, you should regularly drain
____ moisture from the filter on the regulator. If you drain dirt or oil from the filter, or if the air in the respirator smells bad, replace the filter.
 (h)  Make sure the emergency air supply and respirators operate correctly.
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 28-11-00
 ALL  ú ú 01 Page 239 ú Jun 20/97

A

757
MAINTENANCE MANUAL

 ~.............................................................................. | | | FIRE-SAFE CONDITION | | | | A FIRE-SAFE CONDITION OCCURS WHEN THE VAPOR CONCENTRATION IS | | LESS THAN 10% OF THE LEL. | | | 2..............................................................................1
 ~............................................................................. | TABLE 203 | ............................................................................... | HEALTH-SAFE CONDITION | | | | A HEALTH-SAFE CONDITION OCCURS WHEN THE OXYGEN CONTENT IS A | | MINIMUM OF 19.5% TO A MAXIMUM OF 23.5% BY VOLUME AT SEA LEVEL, | | AND THE VAPOR CONCENTRATIONS ARE BELOW THESE PERMISSIBLE EXPOSURE | | LIMITS: | | | ............................................................................... | | Permissible Exposure Level | | | | Total Hydrocarbons TWA *[1]| Lower Explosive Level | | Fuel | (ppm) | (percent) | ............................................................................... |Aviation Gasoline | 300 | 1.0 | ...............................................................................
 |Jet A  |  |  |
 |Jet A-1  |  160  |  0.7  |
 |JP-5  |  |  |
 |JP-8  |  |  |

 2..................…..............................…...........................1
 *[1] TWA - Time Weighted Average
 S 942-309
 (5)
Remove these items before you go into a fuel tank:
　
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本文鏈接地址：757 AMM 飛機維護手冊 燃油 CHAPTER 28 - FUEL 1(51)