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ON AIRPLANES WITHOUT THE ZERK FITTING, YOU MUST DISASSEMBLE THE SPROCKET TO LUBRICATE THE SPROCKET BEARINGS AND SLEEVE (AMM 52-11-11/401)
ON AIRPLANES WITH THE ZERK FITTINGS, USE A GREASE GUN TO LUBRICATE THE SPROCKET BEARINGS AND SLEEVE
Main Entry Door No. 5 Figure 304 (Sheet 6)
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A
747-400 MAINTENANCE MANUAL
 TASK 12-21-04-603-015
 3.  Crew Compartment Overhead Hatch Lubrication___________________________________________
 A. Consumable Materials
 (1)  D00013 Grease, MIL-G-23827
 B. References
 (1)  IPC 52-21-01 Fig. 1
 C. Access
 (1)  
Location Zone (Crew Compartment Overhead Hatch)
 221 Control Cabin, LH

 (2)  
Access Panel (Crew Compartment Overhead Hatch)
 839L Hatch - Control Cabin Overhead

 

 D. Lubricate Overhead Hatch for the Crew Compartment (Fig. 306)
 S 013-056
 (1)  
Open the overhead hatch.

 S 643-017

 (2)  
Lubricate the overhead hatch for the crew compartment as shown in Figure 306.

 (3)  
Install the pan and the internal handle.

 (4)  
Close the overhead hatch.

 S 413-023
 S 413-018
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747-400
MAINTENANCE MANUAL

Not Used
Figure 305

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C72524
A
747-400 MAINTENANCE MANUAL
SEE C
SEE  A 
SEE  B 
INBD  FWD 
A 
EXTERNAL HANDLE 
MIL-G-23827 (2 LOCATIONS) 1 2 
EXTERNAL HANDLE  ACTUATOR TRIGGER 
INBD  FWD 
2 1 AND THE HANDLE SHAFT PUT THE GREASE AROUND THE ACTUATOR PUSH THE TRIGGER TO GET AT THE ACTUATOR AND THE HANDLE SHAFT  2 POINTS B 
Figure 306 (Sheet 1) Crew Compartment Overhead Hatch 

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747-400
MAINTENANCE MANUAL

INTERNAL HANDLE 
PAN 
SEE  D  (10 LOCATIONS) BOLT 

FWD
C
LATCH ACTUATOR FORKS
MIL-G-23827 (4 LOCATIONS) 34
4 POINTS
D
3 REMOVE THE INTERNAL HANDLE AND THE PAN TO GET AT THE LATCH ACTUATOR FORKS
LUBRICATE THE INNER SURFACES OF THE
LATCH ACTUATOR FORKS

4
Crew Compartment Overhead Hatch Figure 306 (Sheet 2)
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A
747-400 MAINTENANCE MANUAL
 TASK 12-21-04-603-019
 4.  Forward Electronics Access Door Lubrication___________________________________________
 A. Consumable Materials
 (1)  D00013 Grease - MIL-G-23827
 B. References
　
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