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N° 169-162 DATE: August 4, 2020 REV. : A - December 2, 2020 Page 1 of 15 TITLE ATA 64 - TAIL ROTOR IMPROVED DUPLEX BEARING INSTALLATION
REVISION LOG Helicopters already compliant with previous issues of this Service Bulletin do not need any additional action.
Revision A is issued in order to provide additional clarifications about required materials and components return procedures.
Leonardo S.p.A.
Via Giovanni Agusta, 520 21017 Cascina Costa di Samarate (VA) Italy Tel.: +39 0331 229111 - Fax: +39 0331 229605/222595 An appropriate entry should be made in the aircraft log book upon accomplishment.
If ownership of aircraft has changed, please, forward to new owner.
SERVICE BULLETIN
S.B. N°169-162 DATE: August 4, 2020 Page 2 of 15 REVISION: A - December 2, 2020
1. PLANNING INFORMATION A. EFFECTIVITY Part I : All AW1 69 helicopters equipped with Tail Rotor Duplex Bearing P/N 4F6430V00551 Part II : All AW1 69 helicopters already equipped with Tail Rotor Duplex Bearing P/N MM6430V00151.
B. COMPLIANCE Part I:
Within 400 flight hours or 4 months whichever occurs first from the issue of this Service Bulletin
Part II:
NOTES A non-cumulative tolerance of 10% may be applied to the compliance time s specified below to allow synchronization of the required inspections with other required maintenance tasks for which a non-cumulative tolerance is already granted in the applicable Maintenance Manual.
Within 400 FH accumulated by the Duplex Bearing PN MM6430V00151 installed on AW169 helicopter.
C. CONCURRENT REQUIREMENTS Refer also to SB 169 -178 for additional operations needed upon any installation of improved Tail Rotor Duplex Bearing P/N MM6430V00151 D. REASON This Service Bulletin is issued in order to provide the necessary instruction on how to perform the installation of the new Tail Rotor Duplex Bearing P/N MM6430V00151 in lieu of P/N 4F6430V00551.
E. DESCRIPTION Leonardo Helicopters Division has developed this Service Bulletin in order to require the installation of the new Tail Rotor Duplex Bearing P/N MM6430V00151 in lieu of P/N 4F6430V00551 on AW169 helicopters.
S.B. N°169-162 DATE: August 4, 2020 REVISION: A - December 2, 2020 Page 3 of 15 The new Tail Rotor Duplex Bearing features material change s for different internal components and general optimization of the internal micro geometry, aimed to reduce the heat generation.
Part I of this Service Bulletin provides the necessary instructions on how to install the new Tail Rotor Duplex Bearing P/N MM6430V00151 in lieu of P/N 4F6430V00551.
Part II of this Service Bulletin requires any new Tail Rotor Duplex Bearing P/N MM6430V00151 to be replaced with a brand new unit everytime the component reaches a certain amount of FH.
Duplex bearings (P/N 4F6430V00551 and P/N MM6430V00151) removed for scheduled replacement must be returned to LHD (no scrap on site is allowed). Customer/Operator are invited to contact their contact point in Leonardo Helicopters Material Services, in order to receive proper instructions.
Duplex bearings (P/N 4F6430V00551 and P/N MM6430V00151) removed for unscheduled replacement due to findings must be returned to LHD facility as well.
Customer/Operator are invited to contact their contact point in LH Service Engineering (engineering.support.lhd@leonardocompany.com), in order to receive proper instructions.
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, b efore 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 the following MMH are deemed necessary:
Part I: approximately ten (10) MMH Part II: approximately ten (10) MMH
S.B. N°169-162 DATE: August 4, 2020 Page 4 of 15 REVISION: A - December 2, 2020 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 69-A-00-20-00-00A-120A-A Helicopter on ground for a safe maintenance.
- DM02 69-A-64-31-04-00A-720A-A Sliding control assy - Install procedure - DM03 69-A-64-31-03-00A-520A-A Spider plug - Remove procedure - DM04 69-A-64-31-03-00A-720A-A Spider plug - Install procedure - DM05 69-A-64-31-01-00A-520A-A Pitch link - Remove procedure - DM06 69-A-64-31-01-00A-720A-A Pitch link - Install procedure - DM07 69-A-64-31-02-00A-520A-A Scissors assy - Remove procedure - DM08 69-A-64-21-05-00A-520A-A Lightning conductor jumper
- Remove procedure - DM09 69-A-64-31-05-00A-520A-B Duplex bearing - Remove procedure - DM10 69-A-64-31-05-00A-720A-B Duplex bearing - Install procedure - DM11 69-A-64-31-07-00A-520A-A Boot - Remove procedure -
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 IPD Illustrated Parts Data
S.B. N°169-162 DATE: August 4, 2020 REVISION: A - December 2, 2020 Page 5 of 15 ITEP Illustrated Tool and Equipment Publication LHD Leonardo Helicopters Division MLG Main Landing Gear MMH Maintenance-Man-Hours
3) ANNEX N.A.
J. PUBLICATIONS AFFECTED AW169 Aircraft Maintenance Publication (AMP) AW169 Illustrated Part Data (IPD) K. SOFTWARE ACCOMPLISHMENT SUMMARY N.A.
S.B. N°169-162 DATE: August 4, 2020 Page 6 of 15 REVISION: A - December 2, 2020
2. MATERIAL INFORMATION A. REQUIRED MATERIALS
1) PARTS PART I # P/N ALTERNATIVE P/N DESCRIPTION Q.TY LVL NOTE LOG P/N 1 6F6400P00411 REWORK, SPACER AND DUPLEX REPLACEMENT REF . - 2 MM6430A00151 Spacer 1 .. - 3 6F6430P00231
REWORK, SLIDING
CONTROL ASSEMBLY T/R REF .. - 4 MM6430V00151 Tail rotor duplex bearing 1 … 169-162L1 5 6F6430A01352 Peeling shim 1 … 169-162L1 6 LAMHALPATCH01R1 Protective layer REF .. (1) 7 M06SHA094D01R1 Thermal strip REF .. (1)(2) 8 MS24665-155 Pin 10 . 169-162L1 9 MS24665-304 Pin 1 . 169-162L1 10 MS24665-302 Pin 3 . 169-162L1 11 A256A029 O-ring 1 . 169-162L1 12 AW001CK07UV Strap Tiedown 2 . 169-162L1
PART II # P/N ALTERNATIVE P/N DESCRIPTION Q.TY LVL NOTE LOG P/N 13 MM6430V00151 Tail rotor duplex bearing 1 . 169-162L1 14 6F6430A01352 Peeling shim 1 . 169-162L1 15 LAMHALPATCH01R1 Protective layer REF . (1) 16 M06SHA094D01R1 Thermal strip REF . (1)(2) 17 MS24665-155 Pin 10 . 169-162L1 18 MS24665-304 Pin 1 . 169-162L1 19 MS24665-302 Pin 3 . 169-162L1 20 A256A029 O-ring 1 . 169-162L1 21 AW001CK07UV Strap Tiedown 2 . 169-162L1 Refer also to IPD for the consumable materials required to comply with the AMP DM referenced in the accomplishment instructions
2) CONSUMABLES Refer also to AMDI for the consumable materials required to comply with the AMP DM referenced in the accomplishment instructions.
S.B. N°169-162 DATE: August 4, 2020 REVISION: A - December 2, 2020 Page 7 of 15
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 169-162L1 1 (3) 1,2 MM6430A00151 1 - 1 LAMHALPATCH01R1 REF (1) 1,2 M06SHA094D01R1 REF (1) 1,2 NOTES
(1) Item required in Q.ty within Part III of SB 169-178, to be applied concurrently with current SB. Only Q.ty 1 of this item is necessary for the application of both current SB and SB 169-178. Item shall be separately ordered in Q.ty within SB 169-178, as it is not included in logistic P/N 169-162L1.
(2) Identification on label M06SHAL094D01R1 is printed on the thermal strip.
(3) Logistic P/N is firstly required upon accomplishment of Part I. It shall be made newly available for Part II embodiment in accordance with the relevant compliance.
B. SPECIAL TOOLS # P/N DESCRIPTION Q.TY NOTE PART 22 6F6430G00131 Tool, T/R pitch control link adjust 1 (1) / 23 8G6420G01832 T/R spider & slider, remove/installation tool kit 1 (1) / 24 6F6430G04031 TR duplex bearing removal-installation tool kit 1 (1) /
Refer also to ITEP for the special tools required to comply with the AMP DM referenced in the accomplishment instructions.
(1) If the present tool is not already owned in Customer’s stock, please contact Leonardo Helicopters order administration point of contact to request the tool supply on loan. As soon as the present Service Bulletin is implemented the tool supplied on loan shall be promptly returned to Leonardo Helicopters.
C. INDUSTRY SUPPORT INFORMATION 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 cha rge 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.
S.B. N°169-162 DATE: August 4, 2020 Page 8 of 15 REVISION: A - December 2, 2020 Please Issue relevant MMIR form to your Warranty Administration Dpt.
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 and GEN-19-075.
NOTE: Duplex bearings (P/N 4F6430V00551 and P/N MM6430V00151) removed for scheduled or unscheduled replacement must be returned to LHD (no scrap on site is allowed).
For scheduled replacement, Customer/Operator are invited to contact their contact point in Leonardo Helicopters Material Services, in order to receive proper instructions. For unscheduled replacement, Customer/Operator are invited to contact their contact point in LH Service Engineering ( engineering.support.lhd@leonardocompany.com), in order to receive proper instructions.
NOTE: please provide P/N, S/N and FH of the TR Duplex Bearing P/N MM6430V00151 to be removed from the helicopter at next application of Part II of the current SB.
S.B. N°169-162 DATE: August 4, 2020 REVISION: A - December 2, 2020 Page 9 of 15
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 reuse.
b) Exposed thread surface and nut must be protected using a layer of tectyl according to MIL -C-16173 grade I.
c) All lengths are in mm.
PART I
1. In accordance with DM 69-A-00-20-00-00A-120A-A, prepare the helicopter on ground for a safe maintenance. Disconnect the battery, all electri cal power sources and/or the external power supply.
2. In accordance with AMP DM 69-A-64-31-03-00A-520A-A, remove the spider plug.
3. In accordance with applicable steps of AMP DM 69-A-64-31-01-00A-520A-A, temporarily detach the upper attachment of all the pitch links from the TR.
4. In accordance with applicable steps of AMP DM 69-A-64-31-02-00A-520A-A, disconnect the upper half scissors from the spider.
5. In accordance with applicable steps of AMP DM 69-A-64-31-07-00A-520A-A, disconnect and lower the boot from the spider.
6. In accordance with AMP DM 69-A-64-21-05-00A-520A-A, d isconnect the TR lightning conductor jumper.
CAUTION Pay attention to prevent rod rotation, when screwing / un-screwing the castellated nut, holding the rod square end.
NOTE Before removal of the TR duplex bearing, take note of its installation orientation marking “OUT” on the outboard visible face. After removal mark “IN” on the inboard opposite face of the TR duplex bearing. Use an indelible pen.
7. In accordance with AMP DM 69-A-64-31-05-00A-520A-B, remove Tail Rotor Duplex
S.B. N°169-162 DATE: August 4, 2020 Page 10 of 15 REVISION: A - December 2, 2020 Bearing P/N 4F6430V00551.
8. Return the Tail Rotor Duplex Bearing P/N 4F6430V00551 removed within step 7 to Leonardo Helicopters Customer Support within 2 days. Please refer to your usual contact point in Leonardo Helicopters Material Services, in order to arrange the return of replaced items in LHD facility.
CAUTION Duplex Bearing must be installed with a co ntrolled orientation.
9. In accordance with AMP DM 69-A-64-31-05-00A-720A-B, install Tail Rotor Duplex Bearing P/N MM6430V00151, keeping the outer race outside marking prop erly readable while letting down in the slider/spider seat. Refer to Figure 1.
10. With reference to Figure 2, mark Retromod P/N 6F6430P00231 on the Sliding Control assembly P/N 6F6430A01232 by method of vibro-etching.
11. In accordance with the instructions reported on Part III of SB 169-178, install new Thermal Strip and Adhesive Protective Layer on Spacer P/N MM6430A00151.
CAUTION Pay attention to prevent rod rotation, when screwing / un-screwing the castellated nut, holding the rod square end.
NOTES In case during the installation of control rod nut, after several attempts with different nuts, the minimum required breakaway torque (as required by AMP DM 69- A-64-31-04-00A-720A-A) is not reached, please contact the Produc t Support Engineering (engineering.support.lhd@leonardocompany.com) to receive dedicated instructions.
12. In accordance with AMP DM 69-A-64-31-04-00A-720A-A, install new S pacer P/N MM6430A00151 and reinstall Sliding Control Assy on the helicopter.
13. Restore the slippage marking on the castellated nut from the hinge bracket element to the rod.
14. In accordance with AMP DM 69-A-64-31-01-00A-720A-A, restore the correct installation of TR pitch links.
S.B. N°169-162 DATE: August 4, 2020 REVISION: A - December 2, 2020 Page 11 of 15 NOTE When performing the following step allow the sealant to cure for at least 2 hours before the next flight.
15. In accordance with AMP DM 69-A-64-31-03-00A-720A-A, install the spider plug.
16. Return the helicopter to flight configuration and record for compliance with Part I of this Service Bulletin on the helicopter logbook.
17. 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°169-162 DATE: August 4, 2020 Page 12 of 15 REVISION: A - December 2, 2020
PART II
1. In accordance with AMP DM 69-A-00-20-00-00A-120A-A prepare the helicopter on ground for a sa fe maintenance. Disconnect the battery, all electrical power sources and/or the external power supply.
2. In accordance with AMP DM 69-A-64-31-03-00A-520A-A, remove the spider plug.
3. In accordance with applicable steps of AMP DM 69-A-64-31-01-00A-520A-A, temporarily detach the upper attachment of all the pitch links from the TR.
4. In accordance with applicable steps of AMP DM 69 -A-64-31-02-00A-520A-A, disconnect the upper half scissors from the spider.
5. In accordance with applicable steps of AMP DM 69 -A-64-31-07-00A-520A-A, disconnect and lower the boot from the spider.
6. In accordance with AMP DM 69 -A-64-21-05-00A-520A-A, disconnect the TR lightning conductor jumper.
CAUTION Pay attention to prevent rod rotation, when screwing / un-screwing the castellated nut, holding the rod square end.
NOTE Before removal of the TR duplex bearing, take note of its installation orientation marking “OUT” on the outboard visible face. After removal mark “IN” on the inboard opposite face of the TR duplex bearing. Use an indelible pen.
7. In accordance with AMP DM 69-A-64-31-05-00A-520A-B, remove Tail Rotor Duplex Bearing P/N MM6430V00151 installed on helicopter. Record on the applicable logcard that the component was removed as required by Part II of SB 169-162.
8. Return the removed Tail Rotor Duplex Bearing P/N MM6430V00151 to Leonardo Helicopters Customer Support within 2 days, also shipping all the documentation relevant to the component, such as logcard and SB compliance forms . Please refer to your usual contact point in Leonardo Helicopters Material Services, in order to arrange the return of replaced items in LHD facility.
CAUTION Duplex Bearing must be installed with a controlled orientation.
9. In accordance with AMP DM 69-A-64-31-05-00A-720A-B, install Tail Rotor Duplex Bearing P/N MM6430V00151, keeping the outer race outside marking properly readable while