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 3. Install the Thrust Reverser Blocker Door Drag Link
__________________________________________________
 A. Parts
 ~.............................................................................. | AMM | | AIPC | ................... .......................... | FIG | ITEM | NOMENCLATURE | SUBJECT | FIG | ITEM | ................................................................................ | 401 | 1 | Pin | 78-31-01 | 01 | 734 | | | 2 | Washer | | | 732 | | | 3 | Screw | | | 730 | | | 4 | Nut | 78-31-15 | 01 | 25 | | | 5 | Washer | | | 20 | | | 6 | Bushing | | | 30 | | | 7 | Washer | | | 15 | | | 8 | Bolt | | | 10 | | | 9 | Drag Link | | | 35 | | | 10 | Washer | 78-31-01 | 01 | 740 | | | 11 | Bushing | | | 746 | | | 12 | Anti-Rotation Clip | | | 744 | | | 13 | Bolt | | | 738 | | | 14 | Nut | | | 742 | | | 15 | Cotter Pin | | | 736 | | | 16 | Bushing | 78-31-15 | 01 | 30 | | | 17 | Bolt | | | 10 | 2......…..........…...................................…..........….....….......1
 B. References
 (1)
AMM 27-62-00/201, Speed Brake Control System

 (2)
AMM 78-00-00/601, Exhaust

 (3)
AMM 78-31-00/201, Thrust Reverser System

 (4)
AMM 78-31-14/601, Thrust Reverser Blocker Doors

 C.
Access

 (1)  
Location Zones
 410 Engine 1 Nacelles
 420 Engine 2 Nacelles
 430 Engine 3 Nacelles
 440 Engine 4 Nacelles

 (2)  
Access Panels 415 and 416 Engine 1 - Thrust Reverser Halves 425 and 426 Engine 2 - Thrust Reverser Halves 435 and 436 Engine 3 - Thrust Reverser Halves 445 and 446 Engine 4 - Thrust Reverser Halves

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 78-31-15
 ALL  ú
 ú  N01  Page 406
 ú  Feb 15/98 

BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
D. Install the Drag Link (Fig. 401).
 S 424-035-N00
 (1)  Install the drag link (9) on the blocker door.
 (a)  
Lift the blocker door to get access to the pivot link on the aft side of the blocker door.

 (b)  
Put the end of the drag link (9) through the slot in the blocker door.

 (c)  
Align the hole in the end of the drag link (9) with the holes in the pivot link.

 (d)  
ON BLOCKER DOORS WITH A SINGLE-LUG PIVOT LINK; install the nut (4), the washers (5, 7), the bolt (17) and the bushings (16).

 (e)  
ON THE BLOCKER DOORS WITH A DOUBLE-LUG PIVOT LINK; install the nut (4), the washers (5, 7), the bolt (8), and the bushings (6).

 (f)  
Tighten the nut to 300 - 400 pound-inches (33.9 - 45.2 newton-meters).

 S 424-036-N00
 (2) Install the drag link (9) to the anchor fitting on the fan cowl.
 (a)  
Align the hole in the end of the drag link (9) with the holes in the anchor fitting.

 (b)  
ON THE ANCHOR FITTINGS WITHOUT THE ANTI-ROTATION CLIP; install the pin (1), the washer (2), and the screw (3).

 (c)  
ON THE ANCHOR FITTINGS WITH THE ANTI-ROTATION CLIP; install the bushing (11) through the drag link (9) and the attachment fitting on the fan cowl. 1) Install the bolt (13) through the clip (12), bushing (11),

 washer (10) and castellated nut (14). 2) Tighten the nut to 50-80 pound-inches (5.64-9.03 newton-meters).
 NOTE: Align the slot in the castellated nut (14) with the
____ hole in the bolt (13) as you tighten it to the correct torque.
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 78-31-15
 ALL  ú ú N01 Page 407 ú Oct 10/93
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
3)  Install the cotter pin (15) through the end of the
 bolt (13) and the castellated nut (14).
 S 444-037-N00
 (3)  Do the activation procedure for the thrust reverser
 (AMM 78-31-00/201).
 S 444-038-N00
 (4)  Do the activation procedure for the speed brake control system
 (AMM 27-62-00/201).
　
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