72-31-05
 ALL  ú ú N01 Page 805 ú Jun 18/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
1.6TH-STAGE LPC STATOR RUBSTRIP - INSPECTION/CHECK
__________________________________________________
 1.  General_______
 A.  This procedure gives the steps for the inspection of the 1.6th-stage LPC Stator Rubstrip for worn areas, damage, cracks, and holes.
 B.  The 1.6th-stage stator rubstrip is immediately aft of the 1st-stage LPC stator of the low pressure compressor (LPC).
 C.  To get access to the 1.6th-stage LPC stator rubstrip for the inspection, you must remove the inlet cone, the 1st-stage fan blades, and the 1st-stage stator.
 TASK 72-31-08-206-001-N00
 2.  Examine the 1.6th-Stage LPC Stator Rubstrip (Fig. 601)___________________________________________
 A.  General
 (1)  
It is necessary to examine the 1.6th-stage LPC stator rubstrip only if the inspection of the 1.6-stage stator (AMM 72-31-05/601) showed wear or erosion.

 B.  
Procedure

 S 216-013-N00
 (1)  
Do these steps to examine the 1.6 stage stator rubstrip for worn areas, damage, cracks, and holes:

 (a)  
Refer to Table 601 and the limits that follow when you examine the 1.6th-stage LPC stator rubstrip (Fig. 601).

 (b)  
The following continue-in-service limits should be applied to engines that have no recent operational discrepancies affecting the EGT margin.

 ~............................................................. | TABLE 601 | | 1.6-STAGE LPC STATOR RUBSTRIP CONTINUE-IN-SERVICE LIMITS | ............................................................... | AREA | LIMIT | ............................................................... | Blade wake erosion | Exposed metal all locations | ............................................................... | Vane rub/erosion | Exposed metal 360 degrees | ............................................................... | Other damage | | | Scatches or Wear | Not permitted | | through the rubstrip | | | that damages the metal | | 2..........................…..................................1
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 72-31-08
 ALL  ú ú N01 Page 601 ú Feb 15/98
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES /MAINTENANCE MANUAL ////////////////////////
A

A
SEE A
STAGE 1.6
OUTER AIRSEAL

A
SEE B EXPOSED METAL
A-A
SILICONE RUBBER
EXPOSED METAL
B
L-B2972 (0000)
1.6  Low Pressure Compressor Stator Rubstrip Figure 601
H04381
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 72-31-08
 ALL  ú ú N01 Page 602 ú Feb 15/98
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
(c)  Continued operation with worn or eroded 1.6 stage LPC rubstrips can result in a TSFC debit as high as 0.6 percent and an increase in EGT of 7 degrees C.
 NOTE: If there is damage other than from wear and erosion,
____
 you must replace the engine immediately
 (AMM 71-00-02/401).

 If the damage exceeds the wear and erosion limits in
 Table 601, the engine can stay in service for 50 hours.
 After 50 hours, you must replace the engine
 (AMM 71-00-02/401).

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 72-31-08
 ALL  ú ú N01 Page 603 ú Jun 18/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
FRONT FAN CASE - REMOVAL/INSTALLATION
_____________________________________
 1.  General
_______
 A.  This procedure gives the steps to remove and install the front fan case.
 B.  The inlet cowl is attached to the front fan case. The front fan case keeps the fan blades in the area of the engine, if a fan blade breaks off.
　
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