72-31-04
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
(3)  S 424-018-N00Attach the 1st-stage stator to the engine with bolts, washers, and nuts.
 NOTE:____ The washers are adjacent to the bolt heads and the nuts.
 (a)  Tighten the bolts to 36-40 pound-inches (4.07-4.52 newton-meters).
 (4)  S 414-019-N00Install the fan exit fairing on the 1st-stage stator (AMM 72-31-03/401).
 (5)  S 034-020-N00Remove the protective mat from the inner surface of the fan case.
 (6)  S 414-021-N00Install all of the 1st-stage fan blades (AMM 72-31-02/401).
 (7)  S 414-022-N00Install the inlet cone (AMM 72-31-01/401).
 (8)  S 034-024-N00Remove the mats from the inner surface of the inlet cowl.

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
1ST-STAGE STATOR - INSPECTION/CHECK
___________________________________
 1.  General_______
 A.  This procedure gives the steps for the inspection of the 1st-stage stator.
 TASK 72-31-04-206-001-N00
 2.  Examine the 1st-Stage Stator____________________________
 A.  General
 (1)  
The 1st-stage stator is a circular flange to which the stator vanes are attached. This stator assembly is at the forward section of the front compressor, and is immediately aft of the fan rotor blades.

 (2)  
You must go into the inlet cowl and remove the fan blades to get access to the 1st-stage stator.

 CAUTION: WHEN YOU EXAMINE THE BLADES AND VANES, FIND THE CAUSE OF ALL
_______ FOREIGN OBJECT DAMAGE (FOD) TO MAKE SURE THAT THE LP COMPRESSOR IS SERVICEABLE. DAMAGE IN THIS AREA CAN BE AN INDICATION OF A MORE DANGEROUS PROBLEM. OTHER COMPONENTS CAN POSSIBLY BE DAMAGED.
 (3)  
The limits in this section will help you know if the engine can continue to operate or if you must remove and repair it.

 (4)  
The edges of surfaces of the vanes that you will examine were possibly blended. To blend a vane is to remove material around damage on the vane until the damaged area becomes smooth.

 B.  
References

 (1)  
AMM 70-31-01/201, Fluorescent Penetrant Inspection

 (2)  
AMM 72-31-02/401, 1st-Stage (Fan) Blade

 (3)  
AMM 72-31-04/801, 1st-Stage Stator

 (4)  
IPC 72-31-04 Fig. 1

 C.  
Access

 (1)  
Location Zone
 412 Engine 1 - LPC
 422 Engine 2 - LPC
 432 Engine 3 - LPC
 442 Engine 4 - LPC

 D.  
Prepare for the Inspection

 (1)
Remove the applicable 1st-stage fan blades (AMM 72-31-02/401).

 S 016-002-N00
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES /MAINTENANCE MANUAL ////////////////////////
A
A

INLET CONE
AT THE
MAXIMUM

1ST-STAGE
DEPTH

FAN BLADE
1ST-STAGE STATOR
SEE A MINIMUM DISTANCE FAN EXIT FAIRING
BLEND BETWEEN BLEND REPAIRS
REPAIR L-A0909ON OPPOSITE EDGES
A-A
MUST NOT BE LESS THAN
AVERAGE

THE AVERAGE VANE WIDTH
VANE WIDTH

SEE B
L-A0616
MINIMUM DISTANCE BETWEEN BLEND REPAIRS
AREAS A AND B
AREAS C AND D
AREA E BOTH SIDES
B-B
AREA C
AREA A

B AREAS A
B
AND B
AREA D 1/3 TRAILING EDGE LENGTH THE BLENDAREA B
REPAIR MUST BE TO THE1/3 LEADING FULL RADIUSEDGE LENGTH
SEE C
L-A3497 AB
1st-Stage Stator Inspection Figure 601 (Sheet 1)
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