MD Helicopters CSP-900RMM-2, Servicing And Maintenance

Page: 1660 / 2144

CSP − 900RMM − 2 MD Helicopters, Inc.
Rotorcraft Maintenance Manual
Page 604
Revision 35
64-30-01
Table 602. Fan Blade Damage Limits (Ref. Figure 602)
Examine
Maximum
Serviceable Limits
Maximum
Repairable Limits
Repair Procedure
Fan blades for cracks. None permitted. None. Remove and replace
cracked fan blade.
Area A:
Fan blade leading edge
for nicks and damage.
Damage permitted in
one location, maximum
dimension and location
as shown.
Maximum material
removal
0.020 inch
(0.51 mm)
depth and
0.040 inch (1.02 mm)
by
0.250 inch (6.35
mm)
in area.
Make damage smooth
with 240 − grit abrasive
cloth (C810) (or finer).
Remove damaged
material or sharp
edges.
Area B:
Fan blade outboard
trailing edge for damage
and missing material.
Damage permitted
within specified limits in
location shown.
Maximum material
removal
0.020 inch
(0.51 mm)
.
Make damage smooth
with 240 − grit abrasive
cloth (C810) (or finer).
Remove damaged
material or sharp
edges.
Area C:
Fan blade inboard trailing
edge for damage and
missing material.
Damage permitted
within specified limits in
location shown.
Maximum material
removal
0.020 inch
(0.51 mm)
.
Make damage smooth
with 240 − grit abrasive
cloth (C810) (or finer).
Remove damaged
material or sharp
edges.
Area D:
Fan blade cuff for nicks
and missing material.
Maximum damage
permitted on flange
0.020 inch (0.51 mm)
in depth or
0.004 inch
2
(2.58 mm
2
)
in area.
Minimum distance
between damage
0.50
inch (12.7 mm)
along
the circumference.
No damage permitted
on inboard and
outboard flat surfaces.
Maximum material
removal
0.020 inch
(0.51 mm)
.
Make damage smooth
with 240 − grit abrasive
cloth (C810) (or finer).
Remove sharp edges
and surface defects.
Area E:
Fan blade spar cylinder
for scratches, nicks, and
missing material.
Maximum damage
permitted
0.015 inch
(0.38 mm)
in depth or
0.020 inch
2
(12.9
mm
2
)
in area.
Minimum distance
between damage
0.25
inch (6.35 mm)
.
No more than three
locations of damage
permitted in each
square inch.
Maximum material
removal
0.015 inch
(0.38 mm)
.
Make damage smooth,
with 240 − grit abrasive
cloth (C810) (or finer).
Remove surface
defects or sharp edges.
Touch up surface finish
with alodine (C241) and
primer (C308).