Subtask 72-00-00-010-078
 B. Open the fan cowl doors (Ref. TASK 71-13-00-010-040):
 FOR 1000EM1
 437AL, 438AR
 FOR 1000EM2
 447AL, 448AR.

 Subtask 72-00-00-040-063
 C. Make the thrust reverser unserviceable (Ref. TASK 78-30-00-481-041).
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 Subtask 72-00-00-010-083

 D. Open the thrust reverser doors (Ref. TASK 78-36-00-010-040):
 FOR 1000EM1
 451AL, 452AR
 FOR 1000EM2
 461AL, 462AR

 4. Procedure
_________
R  (Ref. Fig. 606/TASK 72-00-00-991-308, 607/TASK 72-00-00-991-309, 608/TASK 72-00-00-991-321)
 Subtask 72-00-00-210-071
 A. Over-serviceable-limit Extensions
 -------------------------------------------------------------------------------
CONDITION  MAX EXTENSION
 -------------------------------------------------------------------------------
1. Fan and booster
 A. Spinner front cone
 (1) Damaged surface protection greater than 50  50 cycles percent of total surface
 B. Fan blade
 (1) Fully missing molydag on inner faces of the  250 cycles platforms

 (2) Flaking of Cu.Ni.In coating on blade dovetail  Examine blades for pressure faces (contact areas), up to 10 serviceability. percent if there is no indication of wear on (Ref. TASK 72-21-base material 00-210-006) 1200

 cycles after relubrication. Repeat extension is permitted
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R  Booster Rotor and Stator Damage Extended Figure 606/TASK 72-00-00-991-308
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R  Extended Vanes Damage Limits Figure 607/TASK 72-00-00-991-309- 12 (SHEET 1)
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R  Extended Vanes Damage Limits Figure 607/TASK 72-00-00-991-309- 22 (SHEET 2)
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 Inspection/Check of the Fan Outlet Guide Vanes (OGV) R Figure 608/TASK 72-00-00-991-321- 13 (SHEET 1)
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 Inspection/Check of the Fan Outlet Guide Vanes (OGV) R Figure 608/TASK 72-00-00-991-321- 23 (SHEET 2)
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 Inspection/Check of the Fan Outlet Guide Vanes (OGV) R Figure 608/TASK 72-00-00-991-321- 33 (SHEET 3)
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(3) Flaking of Cu.Ni.In coating on blade dovetail  Examine blades for
 pressure faces (contact areas), more than 10  serviceability.
 percent and less than 50 percent if there is  (Ref. TASK 72-21-
no indication of wear on base material  00-210-006) 400
 cycles after
 relubrication.
 Repeat extension is
 not permitted
 (4) Shingling at mid span shrouds  Turn the shingled
 blades to the 12
 o'clock position
 and unshingle with
 hand force or by
 using a piece of
 wood. Examine
 blades for
 serviceability
 (Ref. TASK 72-21-
00-210-009) Remove
 and send the
 shingled blades to
 a shop for a
 dimensional and an
 F.P.I. inspection
 in less than 50
 cycles.
 (5) Nicks, dents, scratches and sheared edges on  50 cycles
 midspan shroud surfaces up to 0.035 in. (0.89
 mm) deep if defects are not in the midspan
　
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