R R Fan Rotor Blades - Local Distortions Figure 607/TASK 72-21-00-991-315- 34 (SHEET 3)
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R R Fan Rotor Blades - Local Distortions Figure 607/TASK 72-21-00-991-315- 44 (SHEET 4)
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B. Nicks, dents and No limited quantity, if Replace blade (Ref. TASK
scratches on not deeper than 0.003 72-21-00-000-007) and
contour surfaces in.(0.08 mm) after (Ref. TASK 72-21-00-400-
of root area, and removal of high metal. 007) or blend the defects
full airfoil out if damage is within the
of midspan shroud blending limit of figure
(Ref. Fig. 606/TASK 72-21-
00-991-314)
critical area. Blended fan blades must be
repaired following ESM
72-21-01 Rep 01 at first
shop visit opportunity.
C. Nicks, dents and No limited quantity, if Do blending procedure
scratches on not deeper than 0.006 (Ref. TASK 72-21-00-320-
leading edge of in.(0.15 mm) 003)
root area, Area A.
D. Nicks, dents and No limited quantity, if Replace blade (Ref. TASK
scratches on not deeper than 0.006 72-21-00-000-007) and
trailing edge, in. (0.15 mm). (Ref. TASK 72-21-00-400-
Area D 007) or blend the defects
(Ref. TASK 72-21-00-320-
003) if damage is within
the blending limit of
figure.
(Ref. Fig. 606/TASK 72-21-
00-991-314)
Blended fan blades must be
repaired following ESM
72-21-01 Rep 01 at first
shop visit opportunity.
E. Nicks, dents and No limited quantity, if Replace blade (Ref. TASK
scratches on not deeper than 0.03 in. 72-21-00-000-007) and
leading edge in (0.76 mm), with 0.40 in. (Ref. TASK 72-21-00-400-
Area B. (10.16 mm) max length 007) or blend the defectts
for scratches after (Ref. TASK 72-21-00-320-
removal of high metal. 003) if damage is within
the blending limit of
figure.
(Ref. Fig. 606/TASK 72-21-
00-991-314)
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-------------------------------------------------------------------------------Blended fan blades must be repaired following ESM 72-21-01 Rep 01 at first shop visit opportunity.
F. Localized Not serviceable. Replace blade (Ref. TASK distortion on 72-21-00-000-007) and leading and (Ref. TASK 72-21-00-400-trailing edges of 007). root area, Area A.
G. Leading and Two areas may be Do a spot trailing edges distorted up to 0.34 in. fluorescent-penetrant distortion in (8.64 mm) out of contour inspection (Ref. TASK 70-Areas B and D (out provided there are no 51-00-230-002) of root area sharp corners and the trailing edge). minimum length L is six
times the depth of the distortion.
H. Blade tip (Area C) Tip curl must not extend Replace pair of blades if for: more than dimension not in the limits
R (1) Leading edge X1=0.5 in. (13 mm) (Ref. TASK 72-21-00-300-
tip curl across the blade tip and 028) not more than dimension No continued in-service X=0.5 in. (13 mm), along extension is permitted. the leading edge. Maximum deflection from original contour is dimension Y=0.25 in.
(6.35 mm). A maximum of 6 blades must not have tip curl up to dimension X1=1.3 in. (33 mm) across the blade tip and dimension X=2 in. (51 mm) along the leading edge with maximum deflection from original contour dimension Y=0.6 in. (15 mm). Not more than 3
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