-------------------------------------------------------------------------------INSPECT/CHECK MAXIMUM REMARKS SERVICEABLE LIMITS -------------------------------------------------------------------------------
E. Nicks, Scratches, Chafing in Bends
F. Splits, Cracks, Kinks
allowed in the straight section of the duct.
Maximum depth must be less than 10 percent of the wall thickness of the duct.
Maximum length must be less than the duct outside diameter.
Maximum length same as or more than the duct outside diameter.
. Repair the damage(Ref. ESM 71-09-00). . Install the pylon interface duct (Ref. TASK 36-11-49-400-040).
-
If the damage is more than the allowable limits, replace the duct (Ref. TASK 36-11-49-000-040) and (Ref. TASK 36-11-49-400-040).
-
If the damage is lessthan the allowablelimits:. Remove the pylon interface duct (Ref. TASK 36-11-49-000-040). . Repair the damage (Ref. ESM 71-09-00). . Install the pylon interface duct (Ref. TASK 36-11-49-400-040).
-
If the damage is more than the allowable limits, replace the duct (Ref. TASK 36-11-49-000-040) and (Ref. TASK 36-11-49-400-040).
If the damage is less thanthe duct OD, do the weldrepair (Ref. ESM 71-09-00) (Repair No. 3).
If the damage is the sameas or more than the ductOD, do the doubler and
-------------------------------------------------------------------------------INSPECT/CHECK MAXIMUM REMARKS SERVICEABLE LIMITS -------------------------------------------------------------------------------
2. Examine the Pneumatic
System Mid Stage Tee Assembly, look for: (Ref. Fig. 602/TASK 36-11-49-991-915)
A. Cracks, Splits or Kinks None permitted
B. Wrinkles in bends Maximum depth cannot be more than 3 percent of the duct diameter or
0.060 inch (1.52 mm) which ever is smaller.
C. Dents Maximum depth of 0.3 inch (7.62 mm) or Maximum depth cannot be more than 10 percent of the duct outside
diameter.
Minimum width to depth ratio to be 5:1.
Dent has to be free from
cracks, abrasion and sudden contour changes. Radius is not less than
2 times the wall
thickness.
Maximum of 2 dents for
each one foot (305mm) of the duct length.
D. Flat areas Maximum flat area cannot
be more than 2 times the
section repair (Ref. ESM
71-09-00) (Repair No. 4).
Replace the duct(Ref. TASK 36-11-49-000-001) and (Ref. TASK 36-11-49-400-001).
If wrinkles are more thanthe allowable limits,replace the duct(Ref. TASK 36-11-49-000-001) and (Ref. TASK 36-11-49-400-001).
If the dents are more thanthe allowable limits,replace the duct(Ref. TASK 36-11-49-000-001) and (Ref. TASK 36-11-49-400-001).
If the flat areas are more
than the allowable limits,
-------------------------------------------------------------------------------INSPECT/CHECK MAXIMUM REMARKS SERVICEABLE LIMITS -------------------------------------------------------------------------------
E. Nicks, Scratches, Chafing
3. Examine the Pneumatic System Mid Stage Elbow Assembly, look for: (Ref. Fig. 602/TASK 36-11-49-991-915)
A. Cracks, Splits or Kinks
B. Wrinkles in bends
C. Dents
duct outside diameter. replace the duct
The contour change (Ref. TASK 36-11-49-000-
cannot be more than 10 001) and (Ref. TASK 36-11-
percent of the duct 49-400-001).
outside diameter.
Maximum depth cannot be If the damage is more than
more than 10 percent of the allowable limits,
the wall thickness. replace the duct
(Ref. TASK 36-11-49-000-
001) and (Ref. TASK 36-11-
49-400-001).
None permitted Replace the duct
(Ref. TASK 36-11-49-000-
005) and (Ref. TASK 36-11-
49-400-005).
Maximum depth cannot be If wrinkles are more than
more than 3 percent of the allowable limits,
the duct diameter or replace the duct
0.060 inch (1.52 mm) (Ref. TASK 36-11-49-000-
which ever is smaller. 005) and (Ref. TASK 36-11-
49-400-005).
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