SERVICE BULLETIN N° 139-580 ALERT DATE

N° 139-580 DATE: March 19, 2019

REV. : / - February 27, 2019

Page 1 of 10

TITLE

ATA 64 – FIPS TAIL ROTOR BLADES INSPECTION

REVISION LOG

First issue

An appropriate entry should be made in the aircraft log book upon accomplishment.If ownership of aircraft has changed, please, forward to new owner.

Leonardo S.p.A.Via Giovanni Agusta, 52021017 Cascina Costa di Samarate (VA) ItalyTel.: +39 0331 229111 - Fax: +39 0331 229605/222595

ALERT

SERVICE BULLETIN

S.B. N°139-580 ALERT DATE: March 19, 2019 Page 2 of 10 REVISION: /

1. PLANNING INFORMATION

A. EFFECTIVITY

FIPS TR blades P/N 4G6410A00131, P/N 4G6410A00132 and P/N 4G6410A00133,

installed on AW139 helicopters or kept in stock and with accrued FH.

B. COMPLIANCE

• Within fifty (50) FH from the issue date of this Service Bulletin, for FIPS TR blades

installed on AW139 helicopters.

• Before next installation on the helicopter for FIPS TR blades kept in stock and with

accrued FH.

C. CONCURRENT REQUIREMENTS

N.A.

D. REASON

This Service Bulletin is issued in order to require the inspection of the FIPS TR blades.

E. DESCRIPTION

Following some events of short circuit occurred on the TR blades with heater mat, this

Service Bulletin requires a detailed inspection of the TR blades P/N 4G6410A00131,

P/N 4G6410A00132 and P/N 4G6410A00133 for burn signs and, depending on

findings, the replacement of the part.

This one-off inspection is applicable to the TR blades in service, in order to exclude

not detected arcing damages that may have been caused by a short circuit during

FIPS operations. Moreover, as a further precautionary measure, the inspection is

extended to the parts kept in stock and with accrued FH, with close attention to

possible TR blades stored with the blade root fairing installed.

In addition to this, a conditional inspection has been introduced in AW139 AMPI

Chapter 5 prescribing a detailed inspection of the TR blade in case TAIL ROTOR FAIL

caution is displayed.

S.B. N°139-580 ALERT DATE: March 19, 2019 REVISION: / Page 3 of 10

F. APPROVAL

The technical content of this Service Bulletin is approved under the authority of DOA

nr. EASA.21.J.005. For helicopters registered under other Aviation Authorities, before

applying the Service Bulletin, applicable Aviation Authority approval must be checked

within Leonardo Helicopters customer portal.

EASA states mandatory compliance with inspections, modifications or technical

directives and related time of compliance by means of relevant Airworthiness

Directives.

If an aircraft listed in the effectivity embodies a modification or repair not LHD certified

and affecting the content of this Service Bulletin, it is responsibility of the

Owner/Operator to obtain a formal approval by Aviation Authority having jurisdiction on

the aircraft, for any adaptation necessary before incorporation of the present Service

Bulletin.

G. MANPOWER

To comply with this Service Bulletin three (3) MMH are deemed necessary.

MMH are based on hands-on time and can change with personnel and facilities

available.

H. WEIGHT AND BALANCE

N.A.

I. REFERENCES

1) PUBLICATIONS

DATA MODULE DESCRIPTION PART

DM01 39-A-00-20-00-00A-120A-A Helicopter on ground for a safe maintenance

-

DM02 39-B-64-11-01-00A-520A-A Tail rotor blade assembly - Remove procedure

-

DM03 39-B-64-11-01-00A-720A-A Tail rotor blade assembly - Install procedure

-

DM04 39-B-64-11-06-00A-520A-A Blade root fairing - Remove procedure

-

DM05 39-B-64-11-06-00A-720A-A Blade root fairing - Install procedure

-

2) ACRONYMS

AMDI Aircraft Material Data Information

AMP Aircraft Maintenance Publication


AMPI Aircraft Maintenance Planning Information

DM Data Module

DOA Design Organization Approval

EASA European Aviation Safety Agency

FH Flight Hours

FIPS Full Ice Protection System

ITEP Illustrated Tools and Equipment Publication

LHD Leonardo Helicopter Division

MMH Maintenance Man Hours

MMIR Maintenance Malfunction Information Report

TR Tail Rotor

WRM Warranty Reply Memo

3) ANNEX

N.A.

J. PUBLICATIONS AFFECTED

AW139 AMP

K. SOFTWARE ACCOMPLISHMENT SUMMARY

N.A.


2. MATERIAL INFORMATION

A. REQUIRED MATERIALS

1) PARTS

N.A.

2) CONSUMABLES

The following consumable materials, or equivalent, are necessary to accomplish this

Service Bulletin:

# Spec./LHD code number DESCRIPTION Q.TY NOTE PART

1 MIL-S-8660 –

code n. 501229065 Dow Corning (C315) AR (1) -

2 CCC-C-46

code n. 590210190 Cloth, soft lint-free (C011) AR (1) -

Refer to AMDI for the consumable materials required to comply with the AMP DM

referenced in the accomplishment instructions.

3) LOGISTIC MATRIX

N.A.

NOTE

(1) Item to be procured a local supply.

B. SPECIAL TOOLS

The following special tools, or equivalent, are necessary to accomplish this Service

Bulletin:

# P/N DESCRIPTION Q.TY NOTE PART

3 Commercial Light source (fluorescent) / Flashlight 1 (B1) -

4 RMGE-DS-06-2010-RH RH Deck servicing platform (GG-02-00) 1 (B1) -

Refer also to ITEP for the special tools required to comply with the AMP DM

referenced in the accomplishment instructions.

SPECIAL TOOLS NOTE

Item to be procured a local supply. (B1)


C. INDUSTRY SUPPORT INFORMATION

WARRANTY: Owners/Operators who comply with the instructions of this Service

Bulletin no later than the applicable date in the “Compliance” section will be eligible to

receive necessary replacements on free of charge basis, except for Consumable

Materials and Special Tools.

NOTE: Customers who fail to comply with the instructions in this Service Bulletin

before the compliance date are not eligible for the aforementioned special policy.

Please Issue relevant MMIR form to your Warranty Administration Dpt, accompanied

by INSPECTION REPORT and PICTURES of the affected area.

NOTE: the INSPECTION REPORT and PICTURES are mandatory; in case the MMIR

is not accompanied by these documents, it will be rejected.

NOTE: WRM will include RETURN MATERIAL AUTHORIZATION (RMA) number; the

unit removed from the aircraft has to be returned to LHD as per instructions defined

into LHD Information Letter GEN-15-047.


3. ACCOMPLISHMENT INSTRUCTIONS

GENERAL NOTES

a) Place an identification tag on all components that

are re-usable, including the attaching hardware that

has been removed to gain access to the

modification area and adequately protect them until

their later re-use.

b) Shape the cables in order to prevent interference

with the structure and the other existing

installations, using, where necessary, suitable

lacing cords.

NOTE

Skip steps 1 and 2 if the TR blade to be inspected is

kept in stock.

1. In accordance with AMP DM 39-A-00-20-00-00A-120A-A, prepare the helicopter on

ground for a safe maintenance. Disconnect the battery, all electrical power sources

and/or the external power supply.

2. Put the Platform (GG-02-00), or an approved alternative, adjacent to the right side of the

fuselage.

NOTE

Perform following step 3 on TR blade kept in stock if

the TR blade has been stored with the blade root

fairing installed.

3. In accordance with AMP DM 39-B-64-11-06-00A-520A-A remove the blade root fairing

from the first TR blade that you must examine.

CAUTION

Do not remove the soldered terminals and Raychem

S1125 adhesive, if present. Soldered terminals and

Raychem S1125 adhesive removal is not required to

perform the inspection.

4. With reference to Figure 1, do a visual inspection of the area below the removed root

fairing for conditions and burn evidence. Use the light source to get an aid during the

inspection.


NOTE

Skip steps 5 thru 9 if the TR blade inspected is kept in

stock.

5. Repeat steps 3 and 4 to inspect all the TR blades.

6. If you find burn evidence, replace the TR blade/blades as described in the following

procedure:

CAUTION

TR blades P/N 4G6410A00133 are interchangeable

and intermixable with TR blades P/N 4G6410A00132.

TR blades P/N 4G6410A00133 are interchangeable

and NOT intermixable with TR blades P/N

4G6410A00131. To replace a TR blade P/N

4G6410A00131 with P/N 4G6410A00133, the

replacement is required in two positions on opposite

blades (opposite blades must be intended blue and

red, yellow and white).

6.1 In accordance with AMP DM 39-B-64-11-01-00A-520A-A remove the affected TR

blade/blades.

6.2 In accordance with AMP DM 39-B-64-11-01-00A-720A-A install the serviceable

TR blade/blades.

CAUTION

Before connecting the slip ring connector to the heating

mat connector, when you install the blade root fairing,

apply Dow Corning (C315) on the connectors (both on

plug and on receptacle) with a paint brush. Make sure

to make a film on inner and outer parts of the

connectors. Clean excess of compound with a soft

cloth (C011).

7. In accordance with AMP DM 39-B-64-11-06-00A-720A-A install the blade root fairing on

the serviceable TR blade/blades.

8. Remove the platform from the right side of the fuselage.

9. Return the helicopter to flight configuration and record for compliance with this Service

Bulletin on the helicopter logbook.

10. Send the defective TR blade/blades to LHD.


11. Send the attached compliance form to the following mail box:

[email protected]

As an alternative, gain access to My Communications section on Leonardo WebPortal

and compile the “Service Bulletin Application Communication”.

Figure 1 S.B. N°139-580 ALERT DATE: March 19, 2019 Page 10 of 10 REVISION: /

Remarks:

Information:

SERVICE BULLETIN COMPLIANCE FORM Date:

Number:

Revision:

Please send to the following address:

Telephone:

Fax:

B.T. Compliance Date:

Customer Name and Address:

Helicopter Model S/N Total Number Total Hours T.S.O.

LEONARDO S.p.A.CUSTOMER SUPPORT & SERVICES - ITALY

PRODUCT SUPPORT ENGINEERING & LICENSES DEPT. Via Giovanni Agusta, 52021017 Cascina Costa di Samarate (VA) - ITALY

Tel.: +39 0331 225036 Fax: +39 0331 225988

We request your cooperation in filling this form, in order to keep out statistical data relevant to aircraft configuration up-to-date. The form should be filled in allits parts and sent to the above address or you can communicate the application also via Technical Bulletin Application Communication Section placed in Leonardo AW Customer Portal - MyCommunications Area. We thank you beforehand for the information given.

Documents

SERVICE BULLETIN N° 139-580 ALERT DATE