R **ON A/C 062-099, 106-149, 151-199, 204-299, 301-399, 401-499,
Subtask 29-22-00-210-083-A
A. Visual Inspection of the RAT
(1)
Examine the RAT and its related components for:
-cracks,
-corrosion,
- other types of damage.
(2)
Make sure that the RAT and its related components are correctly attached.
(3)
Turn the turbine blades manually and make sure that they turn freely.
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RAT Blades - Zoning for Damage Limits
Figure 514/TASK 29-22-00-991-028
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(4)
Examine the RAT blades for damage:
(a)
If you find cracks, replace the RAT (Ref. TASK 29-22-51-000-010) and (Ref. TASK 29-22-51-400-010).
(b)
If you find corrosion or other types of damage, do the repair, given in the CMM (Ref. CMM 292144) and/or (Ref. TASK 29-22-00-300-001), or replace the RAT (Ref. TASK 29-22-51-000-010) and (Ref. TASK 29-22-51-400-010).
(5)
If, after repair or damage removal, the defects are more than the limits given in the subsequent table, you must replace the RAT (Ref. TASK 29-22-51-000-010) and (Ref. TASK 29-22-51-400-010).
Subtask 29-22-00-910-062-A
B. Damage Limits of the RAT Blades (Ref. Fig. 514A/TASK 29-22-00-991-028-A)
_______________________________________________________________________________
NOTE | DESCRIPTION OF THE DAMAGE
_________ < 1 > ______________________________________________________________________| A scratch, nick or dent on the faces specified by the dimension 'H'
| more than 0.020 in. (0.51 mm) deep or 5% of local blade thickness
| by 0.040 in. (1.02 mm) wide and 1.00 in. (25.4 mm) long, replace
| the RAT.
_________ < 2 > ______________________________________________________________________| A scratch, nick or dent on the leading or trailing edge in the
| area specified by the dimension 'H' more than 0.060 in. (1.52 mm)
| deep by 0.040 in. (1.02 mm) wide, replace the RAT.
_________ < 3 > ______________________________________________________________________| A scratch, nick or dent on the faces in the area specified by the
| dimension 'G' but not included in the areas specified by the
| dimensions 'A', 'B', 'C', 'D' and 'F' more than 0.010 in. (0.25 mm)
| deep or 5% of local blade thickness by 0.040 in. (1.02 mm) wide and
| 1.00 in. (25.4 mm) long, replace the RAT.
_________ < 4 > ______________________________________________________________________| A scratch, nick or dent on the leading or trailing edge in the area
| specified by the dimension 'G' more than 0.010 in. (0.25 mm) deep
| by 0.040 in. (1.02 mm) wide, replace the RAT.
_______________________________________________________________________________
< 5 > | A scratch, nick or dent in the areas specified by the dimensions | 'A', 'B', 'C', 'D' and 'F' more than 0.005 in. (0.13 mm) deep by | 0.040 in. (1.02 mm) wide and 1.00 in. (25.40 mm) long, replace the | RAT. | A small difference in the color and the surface finish in these | areas is permitted.
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