Attachment_0006_MEO_B1613_W58RGZ-19-R-0050.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

B 1613

Jul 24, 2014 8

UH-60A/L Tail Rotor Blade Assembly (70101-31000-043, NSN 1615-01-113-8188 and 70101-11200-044, NSN 1615-01-088-3230), Update OIP Graphic with Critical Characteristic Region and Trailing Edge Doubler (70101-31000-042)

Technical

INTERIM USE OF THIS MEO IS AUTHORIZED

UNTIL AFFECTED DOCUMENT IS UPDATED.

MEO CHANGE TYPE

1) Immediate- Airworthiness, Product Impact, and/or CSI CCsPRIORITY IMPLEMENTATION CATEGORY

UH60 DAA

DMWR 1-1615-287 dated 30 December 2011 TN 136320

MEO B1295

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

In response to TTS 136320, correction made to Figure 3-3: ADD Item 82 :Trailing Edge Doubler (70101-31000-042 ). Revised OIP 1 to add doubler and pitch horn to torque tube bondline evaluation criteria and updated horn to torque tube CC bond location and evaluation criteria. ADD doubler removal and replacement procedure 3-13.24.1. Updated cure cycle for App C, item 3 or 83 (EA9309.3NA adhesive) to 180°F +/- 10° F (82°C +/- 5.5° C) for 60 minutes and added Figure 3-2.1. 3-13.24: Corrected film adhesive item number for trailing edge repair from 75 to item 74 and corrected number of layers (2 ). App C (Expendables List): ADDED film adhesive options for item 74.

MEDRANO.RICH

ARD.P.12719978

Digitally signed by

MEDRANO.RICHARD.P.1271997864

DN: c=US, o=U.S. Government, ou=DoD, ou=PKI, ou=USA, cn=MEDRANO.RICHARD.P.1271997864 Date: 2014.07.23 09:04:40 -05'00'

GRZELECKI.DAN

IEL.P.125929525

Digitally signed by

GRZELECKI.DANIEL.P.1259295250

DN: c=US, o=U.S. Government, ou=DoD, ou=PKI, ou=USA, cn=GRZELECKI.DANIEL.P.1259295250 Date: 2014.07.22 16:03:33 -05'00'

Daniel Grzelecki

HORN.REINHOL

D.J.1087783495

Digitally signed by

HORN.REINHOLD.J.1087783495

DN: c=US, o=U.S. Government, ou=DoD, ou=PKI, ou=USA, cn=HORN.REINHOLD.J.1087783495 Date: 2014.07.23 11:48:08 -05'00'

Richard Medrano Ron Horn PUBLICATION CHANGE REQUEST: REQUEST THAT THE FOLLOWING DATA BE INCLUDED IN THE NEXT

CHANGE OR REVISION TO THE PUBLICATION IDENTIFIED ABOVE.

WP NO. PAGE

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3-9

3-18

3-3

3-3

ADD new INDEX NUMBER 82 to Figure 3-3 as shown in new Figure 3-3 shown on page 6 of this MEO.

ADD new INDEX NUMBER 82 part as follows:

FIGURE & INDEX NO. "82"

PART NUMBER "70101-31000-042"

DESCRIPTION "DOUBLER ASSEMBLY"

QTY PER ASSY "2"

USABLE ON CODE "A B"

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 26 JUN 2014

W58RGZ-17-R-0237

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

3-37

3-40

OIP 1,

NO. 6

NO. 6.1

NO. 7

NO. 8

NO. 8.1

OIP 1

CHARACTERISTIC : REPLACE with the following:

"Trailing edge separation STA 15.062 to STA 35.00"

INSP METHOD: REPLACE with the following:

"Visual/Coin Tap per 3-11.7.1"

REQUISITE: REPLACE last sentence with the following:

" Repair per paragraph 3-13.24 using film adhesive."

ADD new NO. 6.1 as follows:

REF. LTR: "G"

CHARACTERISTIC: " Disbonds, bond separations or delaminations in the upper and lower Horn to torque tube bond area and pitch horn to blade interface at fillet radius. Cosmetic or superficial damage must be carefully examined to ensure no disbond, delamination, or bond separation exists. " INSP METHOD: "Visual/Coin Tap per 3-11.7.1" REQUISITE: "None permitted, replace pitch horn or tail rotor blade assembly."

CHARACTERISTIC: REPLACE with the following:

"Holes, punctures or cracks"

REPLACE the third REQUISITE with the following:

"Voids greater than 0.50 sq. in. not allowed. Remove and replace doubler per 3-13.24.1."

ADD new NO. 8.1 as follows:

REF. LTR: "H"

CHARACTERISTIC: " Inboard corner of trailing edge doubler for square corner.

INSP METHOD "Visual" REQUISITE "Square corner is normal, angled (chamfered) corner at the inboard corner of the trailing edge doubler is not allowed, remove and replace doubler per 3-13.24.1

REPLACE OIP 1 Figure with Figure found on page 7 of this MEO.

MED FORM 26 JUN 2014

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3-52

3-66

3-70

3-128

3-133

3-12.1

3-13.4.8.p

3-13.6.j.

3-13.24.f.

(1)

3-13.24.1

3-2.1

REPLACE last sentence with the following: "Required cure is 180°F +/- 10° F (82°C +/- 5.5°C) for 60 minutes, per Table 3-2.1 using a heat lamp, heat gun or curing blanket."

ADD Table 3-2.1 at the end of 3-12.1: "Adhesive Mix Ratio and Cure Cycle - EA9309.3NA" as shown on page 8 of this MEO.

REPLACE as follows:

"p. Cure repair at 180°F +/- 10° F (82°C +/- 5.5°C) for 60 minutes per Table 3-2.1 "

REPLACE first sentence with the following: " Cure epoxy adhesive (App C, item 83 or item 2) at 180°F +/- 10° F (82°C +/- 5.5°C) for 60 minutes per Table 3-2.1 "

REPLACE with the following: Prepare two (2) layers of film adhesive (App C, item 74) to extend full width chordwise and length spanwise of bond separation."

ADD new paragraph as follows:

3-13.24.1 Remove and Replace Trailing Edge Doubler Remove and replace the trailing edge doubler (Figure 3-3, 82) per the following procedure.

a. Mask off an area around the doubler 0.5-inch larger than the doubler bonding surface.

CAUTION

Use caution to avoid sanding into or gouging the lightning protection mesh or fiberglass plies along the trailing edge, topside, bottom side, end cap and inboard corner of the blade paddle around the doubler. Chamfering the inboard corner of the blade paddle trailing edge or doubler is not acceptable.

b. Attempt to remove the layers of the doubler (Figure 3-3, 82) by peeling individual or multiple plies with pliers. If necessary, use a sharp nickel copper scraper, (App C, item 92) to aid in peeling plies. If the first ply of nylon wrap can not be peeled from the blade skin, remove this ply by sanding initially with NEW 80 grit sandpaper (App C, item 6) followed by NEW 150 grit sandpaper (App C,item 80). Do not damage underlying blade skin.

c. If the doubler cannot be removed by peeling as described above, then remove the doubler by sanding initially with NEW 80 grit sandpaper (App C, item 6) followed by NEW 150 grit sandpaper (App C,item 80). Do not damage underlying blade skin.

CAUTION

Continuously monitor surface temperature of blade to ensure that blade surface temperature does not exceed 190°F (82°C).

d. Alternatively, doubler may be removed by local application of heat not to exceed 190F to soften adhesive and facilitate removal of doubler with a sharp nickel copper scraper, (App C, item 92). Do not damage underlying blade skin.

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

3-133 3-13.24.1

WARNING

Acetone is extremely flammable and toxic to eyes, skin, and respiratory tract. Wear protective gloves and goggles/face shield. Avoid repeated or prolonged contact. Use only in well-ventilated areas (or use approved respirator as determined by local safety/industrial hygiene personnel).

Keep away from open flames, sparks, hot surfaces or other sources of ignition.

Desoclean 45 is extremely flammable and toxic to eyes, skin, and respiratory tract. Wear protective gloves and goggles/face shield. Avoid repeated or prolonged contact. Use only in well-ventilated areas, or use approved respirator as determined by local safety/industrial hygiene personnel. Keep away from open flames, sparks, or other sources of ignition.

Methyl propyl ketone is extremely flammable and toxic to eyes, skin, and respiratory tract. Wear protective gloves and goggles/face shield. Avoid repeated or prolonged contact. Use only in well-ventilated areas (or use approved respirator as determined by local safety/industrial hygiene personnel). Keep away from open flames, sparks, or other sources of ignition.

e. Wipe blade surface with cheesecloth (App C, item 12) moistened with acetone (App C, item 1) or solvent (App C, item 4). Wipe dry with clean cheesecloth before solvent dries. Repeat wet-wipe followed by dry-wipe until water break free surface condition has been established per paragraph 3-10.5.

f. Dry bonding surface at 120° to 140° F (49° to 71° C) for at least 1 hour.

WARNING

Keep resin off skin, eyes, and clothes. May irritate the eyes and skin.

Prolonged or repeated contact may cause sensitization-allergic skin reaction. Avoid contact with mineral acids. Avoid mixing resin and curing agent in batches greater than one pound; toxic gases may be released by heat build-up. Dispose of resin waste in accordance with local, state, or federal regulations. Protection: Safety glasses or goggles, protective gloves, forced ventilation, NIOSH/MSHA approved respirator if curing vapors or cured product exceed established exposure.

limits.

g. Mix components of prepackaged adhesive (App C, item 83) until color is uniform. If bulk adhesive (App C, item 2) is used, refer to paragraph 3-12.1.

h. Brush a uniform coating of epoxy adhesive onto the doubler and doubler bonding surfaces on blade.

MED FORM 26 JUN 2014

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

3-133

C-5

3-13.24.1 i. Place scrim cloth (App C, item 13) over layer of adhesive in area where nylon wrap will be bonded and press in place using tongue depressor (App C, item 87). Scrim cloth may extend 1/16-inch outboard of doubler bonding surface. Add smoothing coat of adhesive to exposed scrim cloth. Use of scrim cloth is a requirement to ensure a uniform bond line thickness.

j. Place new trailing edge doubler (Figure 3-3, 82) over layer of epoxy adhesive and scrim cloth at inboard trailing edge corner of blade paddle in doubler bonding area. Do not chamfer the inboard corner of the blade doubler or blade paddle.

k. Apply 10 to 15 psi and cure the doubler to the blade paddle at 180°F +/- 10° F (82°C +/- 5.5°C) for 60 minutes, per Table 3-2.1. Alternatively doubler to blade bond may be vacuum bag cured per 3-13.33.

l. Tap test per 3-11.7.1. to verify bond integrity within OIP limits.

REPLACE ITEM NUMBER 74 with the following:

NATIONAL STOCK NUMBER: 8040-01-590-0425

DESCRIPTION: Film Adhesive, Metlbond 1113, SS8612-006, Type I, Class 2 (.06 psf), (04622)

U/M: RL

ADD the following to ITEM NUMBER 74

NATIONAL STOCK NUMBER: 8040-01-294-2625

DESCRIPTION: Film Adhesive, AF-163-2K, SS8612-006, Type IV, Class 2 (.06 psf) , (0KHE3)

U/M: RL

NATIONAL STOCK NUMBER: 8040-01-295-2922

DESCRIPTION: Film Adhesive, AF-163-2 OST, SS8612-006, Type IV, Class 2 (.06 psf), (0KHE3)

U/M: RL

NATIONAL STOCK NUMBER: 8040-014-265-5084

DESCRIPTION: Film Adhesive, EA9628H, SS8612-006, Type III, Class 2 (.06 psf), (33564)

U/M: RL

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Adhesive Mix Ratio and Cure Cycle – EA9309.3NA Adhesive Mix Ratio Pot Life *(Minutes at Room Temperature)

Cure Cycle Part A Part B Elevated Temperature*

Hysol EA9309.3NA (Section II.

EXPENDABLE

SUPPLIES Item 2 or 83)

100 22 35 180° F x 60 minutes (±10° F) 82°C x 60 minutes (+/- 5.5°C)

* Maximum volume of adhesive to mix to prevent excessive exotherm: 450 grams

* Ramp up 5° +/- 2° F (2.78° C +/- 1.11° C) per minute

* Ramp down 5° +/- 2° F (2.78° C+/- 1.11° C) per minute

Table 3-2.1 Adhesive Mix Ratio and Cure Cycle - EA9309.3NA

B 1613

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RDMR-AEM

MEMORANDUM FOR RECORD:

SUBJECT: Impact of AED Maintenance Engineering Order (MEO) on maintenance using ,affecting system:

Enclosed MEO is issued by this office and is provided as part of our Technical Data user support mission.

4. THIS MEO CHANGES THE FOLLOWING (Check all that apply):

1.

Consumables

Materials

Expendables

Repairable Bill of Materials (RBOM)Impact

3. PRIORITY IMPLEMENTATION CATEGORY :

6. :

. Point of contact for this action is

2. FOR AMCOM ACQUISITION CENTER USE ONLY:

This MEO was written as a request from a contractor/KO on an active M&O contract.

Request that MEO be transmitted to the contractor as soon as possible.

b.Items checked in this area are considered Normal Priority Implementation Category.

Illustrated Parts Breakdown Change Mandatory Replacement Part

TSO/TSN Change Configuration Change

Publication New Change

Hardware Tooling Equipment

New/Revised Procedure/Process

Process Improvement Project Inspection

Special Process Testing Cost Savings a.Items checked in this area are considered High Priority Implementation Category.

5. Reason(s) MEO Written:

Other

Other

B 1613

DMWR 1-1615-287 dated 30 December 2011 UH60

B 1613

1) Immediate- Airworthiness, Product Impact, and/or CSI CCs

Critical Safety Item(CSI) Review

No

Daniel Grzelecki, RDMR-AEM, daniel.p.grzelecki.civ@mail.mil, 361-961-4062/861-4062

GRZELECKI.DANIEL.P.125

9295250

Digitally signed by GRZELECKI.DANIEL.P.1259295250 DN: c=US, o=U.S. Government, ou=DoD, ou=PKI, ou=USA, cn=GRZELECKI.DANIEL.P.1259295250 Date: 2014.07.22 16:03:13 -05'00'