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difference
between the
vane where
the recess
is cracked
and the
other vanes,
the stage 1
vane
assembly is
unserviceabl
(8) Vane leading and trailing edges 10 cycles/50 hours
- Nicks, dents and scratches on LE/TE in
areas B and C with a maximum axial length
less than 0.117 in. (2.97 mm)
- Nicks, dents and scratches on LE/TE in area 2 cycles/10 hours
A with a maximum axial length of 0.117 in.
(2.97 mm)
2. Fan frame
A. Fan frame
(1) Cracks, any number if max length of 0.16 in. 10 cycles or 25
(4.06 mm) and min. separation of 1 in. (25.4 hours
mm)
(2) Nicks and dents, any number 10 cycles or 25
hours
B. Fan inlet case
(1) Cracks: any number, if max length of 0.16 in. 10 cycles or 25
(4.06 mm) and min. separation of 1 in. (25.4 hours
mm)
(2) Nicks and scratches: any number 10 cycles or 25
hours
(3) Crater in abradable liner (length<5x width) 50 cycles or 125
and damage other than crack rub and hours
circumferential defect : If the damage is
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within the maximum serviceable limit, (Ref. TASK 72-23-00-210-003), but the fan case parent metal is exposed and is confirmed via visual inspection to be undamaged.
(4) Grooves in abradable liner (oriented within 0 50 cycles or 125 deg. to 80 deg. from engine axis and hours length>5x width : If the damage is within the maximum serviceable limit, (Ref. TASK 72-23-00-210-003) but the fan case parent metal is exposed and is confirmed via visual inspection to be undamaged
(5) Circumferential defect in abradable liner 50 cycles or 125 (360 deg. or oriented within 80 deg. to 90 hours. deg. from engine axis) : for one or a cumulated defect less than 2 in. (50.8 mm) if the fan case parent metal remains not damaged under visual inspection.
C. Outlet Guide Vanes (OGV) for: R (Ref. Fig. 608/TASK 72-00-00-991-321)
(1) Broken vane: Not serviceable, if vane is 10 cycles extension replaced
(2) Missing vane: One doublet missing 10 cycles extension
(3) Crack
Outer platform: cracks from or along the 50 cycles extension airfoil are defined
R (Ref. Fig. 608/TASK 72-00-00-991-321)
(4) Metal leading edge missing: up to 0.78 in. 100 cycles (20 mm) in height and 0.39 in. (10 mm) extension
(5) Nicks and/or dents, on leading edge (metallic A maximum service leading edge), if damage between 0.12 in. (3 extension of 100 mm) and 0.19 in. (5 mm) deep cycles
(6) Erosion of composite material, any amount 50 cycles or 125 hours
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D. OGV inner shroud
(1) Cracks, cut or torn seal at mating with OGV, any amount
E. Fan duct panels
(1) Missing panel: Not permitted
(2) Missing lowers on panel
F. Splitter fairing
(1) Cracks: any amount
3. Compressor rotor
A. Compressor rotor blades25 cycles or 50hours
50 cycles with 3 missing lowers maximum
10 cycles or 25 hours
NOTE : The depth of a defect such as a nick is measured along the axis of
____
the damage unless otherwise noted.
(1) Stages 1-4 radial cracks within 0.30 in. (7.6 mm) of the leading and trailing edges more than 0.25 in. (6.4 mm) but less than 0.40 in.
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