S 866-003-C00

 (2)  
For the applicable engine, open the ENGINE START VALVE circuit breaker and attach a DO-NOT-CLOSE tag.

 (3)
Open the right and left fan cowl panels (AMM 71-11-02/201).

 S 016-004-C00
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PREPARE FOR THE INSPECTION
__________________________
 S 016-005-C00 WARNING: OBEY THE INSTRUCTIONS IN AMM 78-31-00/201 WHEN YOU OPEN THE
_______ THRUST REVERSERS. IF YOU DO NOT OBEY THE INSTRUCTIONS, INJURY TO PERSONS OR DAMAGE TO THE EQUIPMENT CAN OCCUR.
 (4) Open the thrust reversers (AMM 78-31-00/201).
 S 436-006-C00 CAUTION: YOU MUST GIVE PROTECTION TO THE INNER SURFACE OF THE INLET
_______ COWL. IF YOU DO NOT OBEY THIS PRECAUTION, DAMAGE TO THE INNER SURFACE OF THE INLET COWL CAN OCCUR.
 (5) Install the protective mats into the lower half of the inlet cowl.
 (a) Apply tape to the seam of the mat.
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737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
FAN FRAME INSPECTION
____________________
 TASK 72-33-00-216-007-C00
 3.  Fan Frame Inspection
____________________
 A.  References
 (1)  
AMM 72-33-00/801, Fan Frame

 (2)  
AMM 72-62-02/601, Radial Drive Shaft

 B.  Access
 (1)  Location Zones
 506 No. 1 Engine
 606 No. 2 Engine

 C.  Make an Inspection of the Fan Frame (Fig. 601)
 S 846-008-C00
 (1)  
If not already done, do the procedure to prepare for the inspection.

 S 216-015-C00

 (2)  
Examine the fan frame case for the damage as follows:

 (a)  Cracks on the fan frame case 1) There is no maximum limit of cracks if they are less than
 0.08 inch (2 mm) in length and not less than 1.00 inch
 (25.4 mm) from other cracks.
 2)  A maximum service extention of 10 cycles or 25 hours is permitted if the cracks are not more than 0.16 inch
 (4.0 mm) in length and are not connected by less than
 1.0 inch (25.4 mm) from other cracks.
 (b)  Dents or nicks on the struts: 1) There is no maximum limit of cracks if they are less than
 0.08 inch (2.00 mm) in depth.
 2)  A maximum service extention of 10 cycles or 25 hours is permitted if you find dents or nicks.
 (c)  There is no maximum limit for corrosion caused by discoloration. 1) If it is possible remove the rust (AMM 72-33-00/601).
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S-M56-MM-0908-(1)-01-B
Fan Frame Inspection Figure 601 (Sheet 1)
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