Attachment 0016_MEO_P7003.pdf

MAINTENANCE ENGINEERING ORDER

(AMCOM Reg. 750-2)

MEO NO.

DATE PAGE 1 of

TITLE Tolerances Unless otherwise noted, dimensions are in inches and tolerances are:

Fractional ………………… ± 1/32 Decimal ………………... ± 0.010 Angular ………………… ± ½°

APPLICABILITY CSI Critical Characteristic Affected?

Impact Statement Attached?

REFERENCES FOR RDECOM USE ONLY

DOCUMENT(S) AFFECTED

PURPOSE OR PROBLEM

PROJECT ENGINEER ENGINEERING REVIEW ENGINEERING RELEASE

MED FORM 5-DEC-09 1401-R-E

AR 70-62 •11 May 2016 P 7003

Jun 6, 2019 2

Gas Generator Nozzle Segments, Cracks, Discoloration (T401, T401C, T701C, T701D)

Technical

INTERIM USE OF THIS MEO IS AUTHORIZED

UNTIL AFFECTED DOCUMENT IS UPDATED.

MEO CHANGE TYPE

4) Normal - Can be implemented with normal priorityPRIORITY IMPLEMENTATION CATEGORY

T700 DAX

DMWR 1-2840-248-2 dtd 30 Sept 2014 TN 198622

MEC-P350210

DOCUMENT CHANGE IS REQUIRED Verification: Hands-On Table-Top None

To specify that no material fallout is allowed; To clarify crack inspection limits for ease of inspection;

To clarify allowance for deposits and discoloration.

BONHAM.ROBI

N.L.1229254100

Digitally signed by

BONHAM.ROBIN.L.12292541

Date: 2019.05.31 12:38:22 -05'00'

SCHNEIDER.EMI

LY.DON.1502474

Digitally signed by

SCHNEIDER.EMILY.DON.150

2474282 Date: 2019.05.31 12:36:22 -05'00'

Emily Schneider

VELAZQUEZ.MA

RK.A.1254578424

Digitally signed by

VELAZQUEZ.MARK.A.125457

Date: 2019.06.04 15:58:41 -05'00'

Robin L. Bonham Mark A. Velazquez PUBLICATION CHANGE REQUEST: REQUEST THAT THE FOLLOWING DATA BE INCLUDED IN THE NEXT

CHANGE OR REVISION TO THE PUBLICATION IDENTIFIED ABOVE.

WP NO. PAGE

NO.

PARA-

GRAPH

FIGURE/

TABLE

NO.

CHANGES

(EXACT WORDING OF CHANGES MUST BE GIVEN)

3-968

3-968, -969

3-973

3-980

3-310.a.

3-310

3-310.o.

(1), (2)

3-312.g.

CHANGE Usable Limits as follows: "Cracks which intersect are not allowed. Material in danger of fallling out (or has fallen out) is not allowed. Total cumulative length of all cracks will not exceed 1 inch."

REPLACE steps a(2) through d(3) as shown on page 2 of this MEO.

CHANGE Usable Limits for both to be "Not allowed."

ADD Note prior to step as follows:

"NOTE. Discoloration that is due to metal buildup or deposits, or hot gas corrosion, does not indicate coating loss. It is acceptable provided inspection limits (para 3-310 or 3-317) are met."

Distribution Statement D:- Distribution authorized to Department of Defense and U.S. DoD contractors only to protect critical technology effective as of 26 June 2014. Other requests for this document must be referred to U.S. Army Aviation and Missile Research, Development and Engineering Center, ATTN: RDMR -AEM , Corpus Christi, TX 78419-5211

MED FORM 17 JAN 2019

CSI CC Affected? NO

MAINTENANCE ENGINEERING ORDER

(AMCOM Reg. 750-2) Continuation Sheet

MEO NO.

PAGE of

MED FORM 15-DEC-09 1401-R-E

AR 70-62 •11 May 2016 2

Inspect Usable Limits Max Repairable Limits Corrective Action .

a. Cracks in all areas: Cracks which intersect are not Not repairable. (1) Stage 1: Replace allowed. Material fallout, or in segment (para 3-621).

danger of falling out is not allowed.

Total cumulative length of all (2) Stage 2: Replace cracks will not exceed 1 inch. segment.

(1) Stage 1 vane Any number of cracks less Not repairable. Replace segment showerhead holes than 1/8 inch long. Each (para 3-621).

(fig. 3-276). crack must be contained within the showerhead holes.

(2) Stage 1 vanes One crack per vane between Not repairable. (1) Stage 1: Replace (except 3/8 and 1/4 inch long. Any segment (para 3-621).

showerhead holes) number less than 1/4 inch long and stage 2 vanes. provided total cumulative length of all (2) Stage 2: Replace cracks in all areas does not exceed 1 inch. segment.

(3) Areas other than Any number less than 1/4 inch long, Not repairable. (1) Stage 1: Replace vanes. provided total cumulative length of all segment (para 3-621).

cracks in all areas do not exceed 1 inch. (2) Stage 2: Replace segment

b. (6068T85G20 and Any amount allowed. Crazed. Same as usable Not applicable.

6068T85G21) Stage 1 coating cracks may intersect. limits.

vane convex surface, inner band, and outer band crazed coating cracks.

NOTE

Missing top coating may appear as discoloration, but there is still a diffusion layer that continues to provide protection.

c. Metal buildup, Clean to remove (table 3-8). Any amount if parent Blend to smooth deposits or After cleaning, any amount metal is undamaged. (para 3-503). Avoid discoloration. on vane is allowed provided it removing CODEP cannot be felt with a scriber having a 0.040 coating when blending.

inch tip radius and contour is not affected. Any amount on inner and outer bands provided it can be assembled normally with its mating parts.

NOTE

• Hot gas corrosion may appear as an area with blisters and blue or black discoloration.

It is not an indication of missing coating.

• There is a diffusion layer under the aluminide coating that continues to provide protection

d. Hot gas corrosion on aluminide coated flowpath surfaces:

(1) Discoloration. Any amount. Not applicable. Not applicable.

(2) Surface Any amount that does not Any amount, provided Repair aluminide roughness or penetrate into parent parent metal is not pitted coating (para 3-515).

blisters. metal. beyond 0.020 inch deep.

(3) Inner and outer Any amount of pits that do Any amount, provided Repair aluminide bands: not penetrate parent metal parent metal is not pitted coating (para 3-515).

more than 0.015 inch deep beyond 0.020 inch deep.

Through holes are not allowed.

MED FORM 17 JAN 2019

P 7003