- Nicks, scratches

Not serviceable
Not serviceable
Any number 1 in. (25.4mm) long, 0.02 in. (0.5 mm) deep after removal of high metal with 1 in.
 (25.4 mm) minimum separation.
Not serviceable.
Any number 1 in.(25.4mm) long, 0.03 in.
 (0.76 mm) deep after removal of high metal and 1 in. (25.4 mm) minimum apart.
Not serviceable.
Any number 0.01 in.
 (0.25 mm) deep after removal of high metal.
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- Dents

- Oil marks

5. Struts for:
 - Cracks

- Nicks, scores and scratches.

- Dents

- Broken stud or damaged threads

6. No. 7 and No. 10 struts (oil supply and scavenge tubes) bulkheads for:
 - Cracks in the bulkhead wall

- Cracks from the bulkhead, extending in the hub skin

Two per tube, smooth contour 0.05 in. (1.27 mm) deep.
Any amount
Not serviceable.
Any number, any length
0.02 in. (0.51 mm) deep after removal of high metal.
Any number, smooth contour 0.02 in. (0.51 mm) deep.
Three (3) maximum:
- If not adjacent to each other: 500hrs/500cyc

 - If two (2) non-serviceable studs are adjacent, but the third one is separated from them by two (2) serviceable studs: 500hrs/500cyc

Two cracks, any lenghton each bulkhead
Not serviceableReplace stud (Ref. TASK72-56-00-300-003) within500 hours/500 cycles.
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7. Sump flooding boss area for:
 - Cracks in the hub  Two cracks, no longer than 1 in. (25.4 mm) and 1 in. (25.4 mm) apart, minimum
 Flame arrestor for:
 - cracks in all areas including the retaining metal strip Any number
 - Missing retaining strips  Serviceable, if onestrip remains
 - Honeycomb grid plug for obturation  Any area up to 50percent of obturation 
R R  - Honeycomb missing  Not serviceable 
R 
R 
R 
8. Thermal insulation  Not serviceable 
blankets 
- missing or protuding blanket in the flowpath
 9. Guide bushing for the oil supply tube for:
 - worn area  No more than 0.06 in.
 (1.52 mm)

Replace the flame arrestor within the next 10 cycles (Ref. TASK 72-56-00-000-001) (Ref. TASK 72-56-00-400-001)
Install a new blanket. Seeoverserviceable limitextension (Ref. TASK 72-00-00-200-025)
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- flush with the LPT Not serviceable 600 cycles or 750 hours
 bore  max serviceable extension is allowed with less than
 0.06 in. (1.52 mm). 25 cycles or 50 hours max serviceable extension is allowed with more than
 0.06 in. (1.52 mm).
 5. Close-up
________
 Subtask 72-56-00-410-053
 A. Close Access
 (1) Make sure that the work area is clean and clear of tool(s) and other items.

 (2) Close the thrust reverser doors: (Ref. TASK 78-36-00-410-040) FOR 1000EM1 451AL, 452AR FOR 1000EM2 461AL, 462AR

 Subtask 72-56-00-440-051
 B. Make the thrust reverser serviceable (Ref. TASK 78-30-00-081-041).
 Subtask 72-56-00-410-054
 C. Close Access
 (1) Close the fan cowl doors: (Ref. TASK 71-13-00-410-040)
 FOR 1000EM1
 437AL, 438AR
 FOR 1000EM2
 447AL, 448AR

 (2) Remove the access platform(s).

 (3) Remove the warning notice(s).

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