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S 866-017-N00
 (2)  
Make sure the forward thrust levers are in the idle position and
 attach the DO-NOT-OPERATE tags.

 S 866-018-N00

 (3)  
Make sure the reverse thrust levers are in the fully stowed position and attach the DO-NOT-OPERATE tags.

 S 046-022-N00
 WARNING: DO THE DEACTIVATION PROCEDURE FOR THE THRUST REVERSER TO
_______
 PREVENT THE OPERATION OF THE THRUST REVERSER. THE ACCIDENTAL
 OPERATION OF THE THRUST REVERSER CAN CAUSE INJURIES TO PERSONS
 AND DAMAGE TO EQUIPMENT.

 (4)  Do the deactivation procedure for the thrust reverser for ground
 maintenance (AMM 78-31-00/201).

 NOTE: Do the deactivation procedure for the isolation valve only.
____ DO NOT put the streamered pins in the thrust reverser sleeves. You will need to manually extend and retract the thrust reverser sleeves in the steps that follow.
 D. Do a Check of the Drag Links (Fig. 601)
 S 016-035-N00
 WARNING: DO NOT OPEN THE THRUST REVERSER HALVES TO EXAMINE THE DRAG
_______ LINKS. IF YOU DO, YOUR WEIGHT CAN CAUSE THE FAILURE OF THE HOLD-OPEN ROD WHEN YOU GO INTO THE FAN COWL. THE THRUST REVERSER HALVES WILL FALL TO THE CLOSED POSITION QUICKLY, WHICH CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
 (1)  Go into the aft end of the fan cowl to get access to the drag links.
 NOTE: Be careful when you get access to the drag links at the top
____ of the thrust reverser. Push on the opposite sides of the inner walls of the fan cowl with your hands and feet while you lift your body up. Do not pull on the drag links or you will cause damage to them.
 S 216-006-N00
 (2)  Examine the end of the drag link at the anchor fitting of the fan
 cowl.

 (a)  FOR ANCHOR FITTINGS WITH THE ANTI-ROTATION CLIP; Do as follows: 1) Make sure the bushing through the drag link and the fitting
 on the fan cowl is not damanged or worn.
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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7. FITTING/ BUSHING
8. BUSHING/ PIN
1. BUSHING/PIN
2. DRAG LINK/ BUSHING 
SEE SEE A  B  WITHOUT ANTI-ROTATION CLIP DRAG LINK ANCHOR FITTING A 
(12 LOCATIONS) BLOCKER DOOR  3. DRAG LINK/ BEARING RACE 
6. BUSHING/BOLT  4. BEARING RACE/ SPHR BEARING 
DRAG LINK  9. PIVOT BOLT LINK/ 

SEE C
5. SPHR BEARING/BOLT
BLOCKER DOOR OPEN (VIEW IN FORWARD DIRECTION) DOUBLE-LUG PIVOT LINK
B C

Blocker Door Drag Link Wear Limits
Figure 601 (Sheet 1)

C58567
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////////////////////////A / PW4000 SERIES /747-400 / ENGINES /MAINTENANCE MANUAL ////////////////////////
NO. INDEX  PART NAME  DIM.  DESIGN LIMITS  WEAR LIMITS  PART WORN REPLACE  PART WORN REPAIR  INSTR REPAIR
DIAMETER  PER-MITTED WEAR DIM.  ANCE CLEAR-MAX DIA 
MIN  MAX 
1  BUSHING  ID  0.5000  0.5007  0.5020  0.0030  X 
BOLT  OD  0.4990  0.4995  0.4975  X  1 
2  DRAG LINK  ID  0.6250  0.6256  -- -0.0000  X  1 
BUSHING  OD  0.6261  0.6267  -- X 
3  DRAG LINK  ID  0.9063  0.9070  -- 0.0020  X  1 
BEARING RACE  OD  0.9057  0.9062  -- X  2 
4  BEARING RACE  ID  0.6990  0.6995  0.7075  RADIAL 0.0060 0.0080  X 
SPHR BEARING  OD  0.6975  0.6980  -- X 
5  SPHR BEARING  ID  0.3750  0.3754  0.3770  AXIAL  X 
　
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