Leonardo ASB 189-265: No revision named

N° 189-265 DA TE: March 4, 2021 REV. : / - Pa ge 1 of 22 TITLE ATA 33 – MR TIP LIGHTS FAIRING RETROMOD

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, 520 21017 Cascina Costa di Samarate (VA) Italy Tel.: +39 0331 229111 - Fax: +39 0331 229605/222595 ALERT

SERVICE BULLETIN

S.B. N°189-265 ALERT DATE: March 4, 2021 Page 2 of 22 REVISION: /

1. PLANNING INFORMATION A. EFFECTIVITY Part I AW189 equipped with MR tip lights kit P/N 8G3340F00411 and:

 FIPS kit P/N 8G3000F00111 or  LIPS kit P/N 8G3000F00211 or P/N 8G3000F00212 not already compliant with Part II of this SB.

Part II AW189 helicopters equipped with MR tip lights kit P/N 8G3340F00411 and:

 FIPS kit P/N 8G3000F00111 or  LIPS kit P/N 8G3000F00211 or P/N 8G3000F00212.

NOTE The installation of the fairings P/N 8G3340A12531 and P/N 8G3340A12631 (parts of the MR tip lights kit P/N 8G3340F00411) present at stock is prohibited from the date of issuance of this Service Bulletin.

B. COMPLIANCE NOTE The installation mandated in Part I shall not be removed, while flying in known icing conditions, until Part II is accomplished.

Part I Before the next flight in icing condition from the receipt of this Service Bulletin.

Part II:

Within 400 FH or 1 year whichever occurs first from receipt of this Service Bulletin.

C. CONCURRENT REQUIREMENTS N.A.

S.B. N°189-265 ALERT DATE: March 4, 2021 REVISION: / Page 3 of 22 D. REASON This Service Bulletin is issued to require the Rescue Hoist Kit to be present during all the flights in known icing conditions for the helicopters installing the MR tip lights kit P/N 8G3340F00411 until this kit is modified through the installation of MR tip light fairing retromod P/N 8G3340P02411.

E. DESCRIPTION A potential issue has been discovered affecting the LH and RH fairings P/N 8G3340A12531 and P/N 8G3340A12631 (parts of the MR tip lights kit P/N 8G3340F00411) in case they are installed during flights in icing conditions. The following investigation identified the installation of the hoist equipment as a mandatory mitigating action to fly in icing condition until the fairings are replaced with a new design. To address this potentially unsafe condition, LHD issue this Service Bulletin to require to check that the hoist equipment is always installed before every flight in known icing condition, on all the helicopters equipped with MR tip lights kit P/N 8G3340F00411 and either FIPS or LIPS kits (Part I), until the installation of the retromod P/N 8G3340P02411 (Part II).

The retromod introduces three new fairings to replace the FWD, RH and LH fairings of the MR tip lights Kit P/N 8G3340F00411. The installation of three bonding strips is required to complete the MR tip light fairing retromod. After installation of this retromod, the MR tip lights installation can be considered equivalent to MR tip lights kit P/N 8G3340F02111 that is applicable to helicopters equipped with FIPS of LIPS kit.

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.

S.B. N°189-265 ALERT DATE: March 4, 2021 Page 4 of 22 REVISION: / G. MANPOWER To comply with this Service Bulletin the following Maintenance-Man-Hours (MMH) are deemed necessary:

Part I: approximately two (2) MMH Part II: approximately forty (40) MMH MMH are based on hands-on time and can change with personnel and facilities available.

H. WEIGHT AND BALANCE PART I Refer to the applicable AW189 helicopter Chart A - Equipment list already provided and referenced to in the AW189 RFM, Section 6.

PART II Rotor tip light equipment installation P/N 8G3340A02811 WEIGHT (Kg) 2.267 ARM (mm) MOMENT (Kgmm) LONGITUDINAL BALANCE 3857.9 8747.5 LATERAL BALANCE -69.7 -158.0

Rotor tip light for IPS complete provision P/N 8G3340A06511 WEIGHT (Kg) 1.714 ARM (mm) MOMENT (Kgmm) LONGITUDINAL BALANCE 3881.6 6653.1 LATERAL BALANCE -74.0 -126.9 I. REFERENCES

1) PUBLICATIONS

DATA MODULE DESCRIPTION PART DM01 89-A-00-20-00-00A-120A-A Helicopter on ground for a safe maintenance I, II DM02 89-A-16-11-00-05A-028A-A Role change procedures - Double rescue hoist system kit - General I DM03 89-A-33-61-01-00A-520A-A Forward light - Remove procedure II

S.B. N°189-265 ALERT DATE: March 4, 2021 REVISION: / Page 5 of 22

DATA MODULE DESCRIPTION PART DM04 89-A-33-61-01-00A-720A-A Forward light - Install procedure II DM05 89-A-33-61-02-00A-520A-A Forward light fairing - Remove procedure II DM06 89-A-33-61-05-00A-520A-A Right light - Remove procedure II DM07 89-A-33-61-05-00A-720A-A Right light - Install procedure II DM08 89-A-33-61-06-00A-520A-A Right light fairing - Remove procedure II DM09 89-A-33-61-03-00A-520A-A Left light - Remove procedure II DM10 89-A-33-61-03-00A-720A-A Left light - Install procedure II DM11 89-A-33-61-04-00A-520A-A Left light fairing - Remove procedure II DM12 CSRP-A-51-22-02-00A-258A-D Preparation of composite bonding surfaces - Other procedure to clean II DM13 CSRP-A-51-22-01-00A-258A-D Preparation of metallic bonding surfaces - Other procedure to clean II DM14 CSRP-A-51-21-02-02A-257A-D Waterborne chromate free primer (AWMS28-002) - Paint and apply marking II DM15 CSRP-A-51-21-01-02A-257A-D Polyurethane paint (MIL-PRF- 85285) - Paint and apply marking II DM16 CSRP-A-51-21-06-00A-644A-D Chromate conversion treatments of alluminium alloys - Chromate II DM17 89-A-20-00-04-00A-921A-A Gasket tape - Replacement (remove and install a new item) II DM18 89-A-20-00-07-00A-921A-A Conductive gasket tape - Replacement (remove and install a new item) II DM19 CSRP-A-51-43-02-00A-921A-D Adhesive bonded anchor nuts - Replacement (remove and install a new item) II

2) ACRONYMS AMDI Aircraft Material Data Information AMP Aircraft Maintenance Publication AR As Required CSRP Common Structural Repair Publication DM Data Module DOA Design Organization Approval EASA European Aviation Safety Agency

S.B. N°189-265 ALERT DATE: March 4, 2021 Page 6 of 22 REVISION: / FH Flight Hours FWD Forward IPD Illustrated Part Data LH Left Hand LHD Leonardo Helicopters Division MMH Maintenance-Man-Hours MR Main Rotor RH Right Hand

3) ANNEX N.A.

J. PUBLICATIONS AFFECTED AW189 Aircraft Maintenance Publication (AMP) AW189 Illustrated Part Data (IPD) K. SOFTWARE ACCOMPLISHMENT SUMMARY N.A.

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2. MATERIAL INFORMATION A. REQUIRED MATERIALS

1) PARTS PART I N.A.

PART II # P/N ALTERNATIVE P/N DESCRIPTION Q.TY LVL NOTE LOG P/N 1 8G3340P02411

MAIN ROTOR ILLUMTN LIGHTS

RETRO MOD REF .

2 8G3340A12432 Fairing assy FWD 1 .. 189-265L1 3 8G3340A12532 Fairing assy LHS 1 .. 189-265L1 4 8G3340A12632 Fairing assy RHS 1 .. 189-265L1 5 8G3340A29951 8G3340A29951A Bonding strip 1 .. 189-265L1 6 8G3340A07651 8G3340A07651A Bonding strip 2 .. 189-265L1 7 A297A05TW03 Rivet 8 .. 189-265L1 8 A297A05TW04 Rivet 2 .. 189-265L1 9 A407A3C2 A407A3C2P Anchor nut 14 .. 189-265L1 10 AN525-10R16 Screw 4 .. 189-265L1 11 MS27039-1-05 Screw 6 .. 189-265L1 12 MS27039-1-09 Screw 28 .. 189-265L1 13 MS27039-1-10 Screw 4 .. 189-265L1 14 NAS1149D0316K Washer 38 .. 189-265L1

2) CONSUMABLES The following consumable materials, or equivalent, are necessary to accomplish this Service Bulletin:

# Spec./LHD code number DESCRIPTION Q.TY NOTE PART 15 Commercial Sealant PR1764 Class B2 (C240) AR (1) II 16 Commercial Sealant 2200 AR (1)(2) II 17 AWMS05-001, Type I, Class B, Grade 2 Code No.

999999999000005965 or 999999999000015245 Sealing compound MC 780 B-2 (C465) AR

(1) II 18 Commercial Paint AR (1) II 19 DTD 900AA/4488A Corrosion preventive compound JC5A (C001) AR (1) II 20 WHPS083 Type A Code No. 999999999000017311 Corrosion preventive compound Cor-Ban 27L (C075) AR (1)(3) II 21 TT-I-735, Grade A Isopropyl alcohol (C039) AR (1) II 22 Commercial Lint-free cloth AR (1) II 23 Commercial Sealant Thixoflex Gray AR (1) II 24 AWMS28-002, Type I, Class 1, Grade A or B Epoxy primer (C596) AR (1) II 25 MIL-DTL-81706, Class 1A & 3, Form II Conversion coating Alodine 1200 (C237) AR (1) II 26 199-05-002 Type I Class 2 Code No. 900000581 Adhesive EA9309.3NA (C021) AR (1) II

S.B. N°189-265 ALERT DATE: March 4, 2021 Page 8 of 22 REVISION: / Refer also to AMDI for the consumable materials required to comply with the AMP DM referenced in the accomplishment instructions.

3) LOGISTIC MATRIX In order to apply this Service Bulletin, the following Logistic P/N can be ordered in accordance with the applicable notes:

LOGISTIC P/N Q.TY (PER HELO) NOTE PART 189-265L1 1 - II NOTE

(1) Item to be procured as local supply.

(2) May be used as alternative to Sealant PR1764 Class B2 (C240).

(3) May be used as alternative to Corrosion preventive compound JC5A (C001).

B. SPECIAL TOOLS N.A.

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 required materials 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.

S.B. N°189-265 ALERT DATE: March 4, 2021 REVISION: / Page 9 of 22

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) Exercise extreme care during drilling operations to prevent instruments, cables and hoses damage.

c) After drilling, remove all swarf and sharp edges.

Apply on bare metal a light film of primer unless the hole is used for ground connection.

d) Protect properly all those equipment not removed from area affected by the modification during installation procedure.

e) Let the adhesive cure at room temperature for at least 24 hours, unless otherwise specified.

f) All lengths are in mm.

PART I

1. In accordance with AMP DM 89-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. Make sure that the helicopter is equipped with the removable parts P/N 8G2591A08311 of the rescue hoist kit P/N 8G2591F00311. If the helicopter is equipped with this kit, skip to Step 4.

3. In accordance with AMP DM 89-A-16-11-00-05A-028A-A, install the rescue hoist kit P/N 8G2591F00311.

4. Return the helicopter to flight configuration and record for compliance with Part I of this Service Bulletin on the helicopter logbook.

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

engineering.support.lhd@leonardocompany.com As an alternative, gain access to My Communications section on Leonardo WebPortal and compile the “Service Bulletin Application Communication”.

S.B. N°189-265 ALERT DATE: March 4, 2021 Page 10 of 22 REVISION: /

PART II

1. In accordance with AMP DM 89-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. With reference to Figures 1 thru 4, perform the installation of the “main rotor illumination light retromod” P/N 8G3340P02411 as described in the following procedure:

CAUTION Be careful when you pull the light P/N LFD/286/001. If you are not careful you can cause damage to the electrical cable.

2.1 In accordance with AMP DM 89-A-33-61-01-00A-520A -A and with reference to Figure 1 Detail A, remove the forward MR tip light P/N LFD/286/001 from the fairing assy FWD P/N 8G3340A12431.

2.2 In accordance with AMP DM 89-A-33-61-02-00A-520A-A and with reference to Figure 1 Detail A, remove the fairing assy FWD P/N 8G3340A12431 from the LH canopy panel. Retain existing hardware for later reuse.

NOTE The following Steps 2.3 and 2.4 are not applicable to helicopters already compliant with SB 189-126.

CAUTION Take care not to damage the composite canopy or aluminium upper deck roof panel.

2.3 With reference to Figure 1 Detail A, remove the existing copper bonding strip P/N 8G3340A13151 and n°2 rivets P/N A297A05 from the LH canopy panel and the upper deck roof panel.

2.4 With reference to Figure 1, install the bonding strip P/N 8G3340A29951 on the LH canopy panel and the upper deck roof panel as described in the following procedure:

2.4.1 With reference to Figure 1 Schematic Detail A, temporarily locate the bonding strip P/N 8G3340A29951 on the structure; countermark the edges on the LH canopy panel and the upper deck roof panel.

S.B. N°189-265 ALERT DATE: March 4, 2021 REVISION: / Page 11 of 22

CAUTION Ensure the all surfaces and holes are free from residue of previously applied adhesive and paint.

2.4.2 In accordance with CSRP DM CSRP-A-51-22-02-00A -258A-D and with reference to Figure 1 Schematic Detail A, prepare the indicated area on the LH canopy panel surface for bonding.

2.4.3 In accordance with CSRP DM CSRP-A-51-22-01-00A-258A-D and with reference to Figure 1 Schematic Detail A, prepare the indicated area on the upper deck roof panel for bonding.

2.4.4 With reference to Figure 1 Detail A, install the bonding strip P/N 8G3340A29951 to the LH canopy panel by means of adhesive EA9309NA (C021) and to the upper deck roof panel by means of conductive sealant PR1764 B2 (C240).

NOTE Prior to re-installing fasteners to be used as electrical bonding contact points, ensure that internal bore of the hole is free from paint, varnish and grease.

NOTE Dip the rivets in the conductive sealant PR1764 B2 (C240) before installation.

2.4.5 With reference to Figure 1 Detail A, install n °2 rivets P/N A297A05TW04 to the bonding strip P/N 8G3340A29951 and the structure.

2.4.6 In accordance with CSRP DM CSRP-A-51-21-02-02A-257A-D and with reference to Figure 1 Detail A, apply the epoxy primer (C596) on the LH canopy panel around the bonding strip P/N 8G3340A29951, where exposed surfaces remain.

NOTE Ensure to apply sealant within the gap between upper deck roof panel and the LH canopy panel.

2.4.7 With reference to Figure 1 Detail A, apply the sealant MC 780 B-2 (C465) all around the bonding strip P/N 8G3340A29951.

2.4.8 In accordance with CSRP DM CSRP-A-51-21-01-02A-257A-D and with reference to Figure 1 Detail A, apply two coats of Polyurethane paint on the bonding strip P/N 8G3340A29951 in accordance with the helicopter paint scheme.

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2.5 With reference to Figures 1 and 4, install the fairing assy FWD P/N 8G3340A12432 on the LH canopy panel as described in the following procedure:

2.5.1 With reference to Figure 1 Schematic Detail A, temporarily locate the fairing assy P/N 8G3340A12432 FWD on the structure, countermark the edges on the bonding strip P/N 8G3340A29951 and the LH canopy panel.

2.5.2 With reference to Figure 1 Schematic Detail A, prepare the indicated area on the bonding strip P/N 8G3340A29951 for good electrical bonding.

2.5.3 In accordance with CSRP DM CSRP-A-51-21-06-00A-644A-D and with reference to Figure 1 Schematic Detail A, protect the indicated area on the bonding strip P/N 8G3340A29951 by means of conversion coating (C597).

NOTE HT3000 sealant tape must not be torn or damaged and must not have excessive squeeze out of the gel layer which is sandwiched between the self-adhesive side and the top layer of the tape. If excessive squeeze out has occurred then there will no longer be any compression in the tape when squeezing in between your fingers.

2.5.4 In accordance with applicable steps of AMP DM 89-A-20-00-04-00A-921A-A and with reference to Figure 4 View C, install HT3000 sealant tape on the fairing assy FWD P/N 8G3340A12432.

2.5.5 In accordance with applicable steps of AMP DM 89-A-20-00-07-00A-921A-A and with reference to Figure 4, install the conductive gasket P/N AW001GH on the fairing assy FWD P/N 8G3340A12432.