-------------------------------------------------------------------------------INSPECT/CHECK MAXIMUM REMARKS SERVICEABLE LIMITS -------------------------------------------------------------------------------
Maximun length same as 
or more than the duct 
outside diameter. 
R 
R 
R 

If the damage is the sameas or more than the ductOD do the doubler and section repair (Ref. CFMI ESM 72-09-03 Repair No. 4).
 5. Examine the anti-ice system middle duct, look for:

 A. Wrinkles in bends.  Maximum depth must be 
less than 5 percent of 
the duct diameter. 
B. Dents.  Maximum depth must be 
less than 20 percent of 
the tube outside 
R  diameter. 
R  Maximum radius of the 
R  dent must be less than 2 
R  times the duct wall 
thickness. 
Maximum of 4 dents per 
each 1 ft. (0.30 m) of
 duct.
 Minimum distance of 1
 in. (25.4 mm) between
 dents.
 No limit to dents
 allowed except in bends,
 no dents are allowed in
 bends.

If the damage is more thanthe allowable limits,replace the duct (Ref. TASK 30-21-49-000-045) and (Ref. TASK 30-21-49-400-045).
If the dents are less thanthe allowable limits,repair the dents (Ref. CFMI ESM 72-09-03). If the dents are more than the allowable limits, replace the duct (Ref. TASK 30-21-49-000-045) and (Ref. TASK30-21-49-400-045).

 -------------------------------------------------------------------------------INSPECT/CHECK MAXIMUM REMARKS SERVICEABLE LIMITS -------------------------------------------------------------------------------
C. Flat areas.  Maximum length must be  If the flat areas are less
 less than 3 times the  than the allowable limits, 
R  outside diameter of the  repair them (Ref. CFMI ESM 
R  duct.  72-09-03). If the flat 
R  Contour change must be  areas are more than the 
R  less than 20 percent of  allowable limits, replace
 the outside diameter of  the duct (Ref. TASK 30-21-
the duct.  49-000-045) and (Ref. TASK
 30-21-49-400-045).
 D. Nicks, scratches,  Maximum depth must be  If the damage is less than
 chafing in  less than 10 percent of  the allowable limits,
 straight section.  the wall thickness of  repair the damage (Ref. 
R  the duct.  CFMI ESM 72-09-03). If the 
R  There is no limit to the  damage is more than the 
R  number of nicks,  allowable limits, replace 
R  scratches or chafing  the duct (Ref. TASK 30-21-
allowed in the straight  49-000-045) and (Ref. TASK
 section of the duct.  30-21-49-400-045).
 E. Nicks, scratches,  Maximum depth must be  If the damage is less than
 chafing in bends.  less than 10 percent of  the allowable limits,
 the wall thickness of  repair the damage (Ref. 
R  the duct.  CFMI ESM 72-09-03). If the 
R  damage is more than the 
R  allowable limits, replace 
R  the duct (Ref. TASK 30-21-
49-000-045) and (Ref. TASK
 30-21-49-400-045).
 F. Splits,  Maximun length must be  If the damage is less than
 cracks,  less than the duct  the duct OD do the weld
 kinks  outside diameter.  repair (Ref. CFMI ESM 
R  72-09-03 Repair No. 3).
 Maximun length same as  If the damage is the same
 or more than the duct  as or more than the duct
 outside diameter.  OD do the doubler and 
R  section repair (Ref. CFMI 
R  ESM 72-09-03 Repair No. 
R  4).
 6. Examine the anti-ice system upper duct, look for:

 -------------------------------------------------------------------------------INSPECT/CHECK MAXIMUM REMARKS SERVICEABLE LIMITS -------------------------------------------------------------------------------
A. Wrinkles in bends.

B. Dents.
R R R R C. Flat areas.
R R R R Maximum depth must be less than 5 percent of the duct diameter.
Maximum depth must be less than 20 percent of the tube outside diameter. Maximum radius of the dent must be less than 2 times the duct wall thickness. Maximum of 4 dents per each 1 ft. (0.30 m) of duct. Minimum distance of 1 in. (25.4 mm) between dents. No limit to dents allowed except in bends, no dents are allowed in bends.
　
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