INSTRUMENT PANEL
B

Combustable Gas Indicator (Example)
Figure 205

G60239
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737-300/400/500MAINTENANCE MANUAL
EXAMPLE OF A WET FUEL CELL PRE-ENTRY CHECKLIST
This checklist must be completed prior to start of wet fuel cell entry and/or at shift change PRIOR to work assignment for the continuation of tank work started by a previous shift.
Wet Fuel Cell Entry Location

Shift: ________ Date: ________ Supervisor: ___________________________________ Area or Building: ________ Stall: ________ Airplane: ________ Tank: ________ 
No power on airplane: battery disconnected, external Power Cord disconnected from airplane, __________________________ DateSignature of Supervisor or Designee _______________________________________________ I confirm that all entry requirements were met prior to any entry. Meter Readings Combustible gas meter (LEL) reading: _________________________ By (FD): ___________________17. Fuel vapor level reading (ppm): _________________________ By: _____________________________16. Oxygen reading (%): _________________________ By: __________________________________________15. Fire Department notified.14. Sponges available for residual fuel mop out.10. Shop personnel entering cells and standby observers have current "fuel cell entry"13. . . . Respirator Use and Maintenance Aircraft Confined Space Entry Safety certification cards. Certification requires the following training: 12. Mechanical ventilation (venturis or blowers) installed to ventilate all open fuel cells. 11. excessive odors are noted, all work shall stop and fuel cells must be evacuated. If ventilation system fails or any ill effects such as dizziness, irriation, or Ventilation system must remain in operation at all times while fuel cells are open.____NOTE: All plugs used have streamers attached. Aerators checked for cleanliness prior to use. approved coveralls, caps and foot coverings, and eye protection. including appropriate personal protective equipment: OSH class 110 respirator at a minimum, Ensure requirements listed on Aircraft Confined Space Entry Permit are complied with, and external power receptacle placarded. 1. 9. 8. Trained attendant and confined space logsheet required for all wet fuel cell entries. 7. blowers, pressure and test equipment, etc.). 6. 5. Only approved explosion proof equipment and tools will be used for fuel cell entry (lights, 3. Boost pump switches off and circuit breakers pulled and placarded. 4. 2. Area secured and warning signs positioned. Airplane and adjacent equipment properly grounded. Radio and radar equipment off (see separation distance requirements). Wet Fuel Cell Entry 

Fuel Tank Pre-Entry Checklist (Example)
Figure 206

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 B.
C.
D.
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737-300/400/500MAINTENANCE MANUAL
 (d)  
Purging of the Center Tank

 (e)  
Purging of the Surge Tank

 (f)  
Fuel Tank Entry

 (g)  
Go Out of and Close the Fuel Tank

 (2)  
Make sure you read and obey the precautions in this task: Purging

 and Fuel Tank Entry Precautions.References

 (1)  
AMM 12-11-00/301, Fuel Sump Draining

 (2)  
AMM 12-31-21/201, Body Section 43 Access Doors and Panels

 (3)  
AMM 20-40-11/201, Static Grounding

 (4)  
AMM 24-22-00/201, Electrical Power - Control

 (5)  
AMM 24-31-11/201, Storage Battery

 (6)  
AMM 27-51-00/201, Trailing Edge Flaps

 (7)  
AMM 27-81-00/201, Leading Edge Slats

 (8)  
AMM 28-11-11/401, Main Tank Access Door

 (9)  
AMM 28-11-31/401, Center Tank Access Door

 (10)
 AMM 28-23-00/201, Defueling

 (11)
 AMM 32-00-01/201, Landing Gear LocksSpecial Tools and Equipment

 (1)  
F80145-4 - (preferred) purge door, center tank
　
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