# Embraer Alert Service Bulletin 505-55-A004: Revision 3

- Rights: © Embraer S.A. Filed by the FAA in regulations.gov docket FAA-2020-0466; AD 2020-12-08 incorporates this document by reference. Not covered by OpenAirDocs’ CC0 dedication.
- Document: [Embraer Alert Service Bulletin 505-55-A004](https://openairdocs.org/service-documents/embraer/505-55a004.md)
- Title as filed: SB505-55-A004_R3
- Pages: 50
- PDF: https://openairdocs.org/files/sha256/e2/5d/e25dca2ba62d9dbbe1f63864b2eac1441aa6d68c9d4ad8e48d571bb24107734c
- Page: https://openairdocs.org/service-documents/embraer/505-55a004/file/e25dca2ba62d

## Text

Each page's text from the PDF; open the PDF at a page with #page=N.

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1. DESCRIPTION
This sheet transmits Revision 03 to Alert Service Bulletin 505-55-A004.
This is a complete reissue of the Bulletin.
This revision incorporates the information presented in the Information Notice related to the previous issues
of this Service Bulletin, as listed below:
SB505-55-A004R02-IN01.
2. ADDITIONAL ACTION
Aircraft that have complied with the original issue and Revision 01 of this bulletin need to comply with
additional action, as follows:
– PART I - ELEVATOR MASS BALANCE AND ATTACHMENT PARTS INSPECTION.
– PART III - AILERON MASS BALANCE AND ATTACHMENT PARTS INSPECTION.
– PART V - RUDDER MASS BALANCE AND ATTACHMENT PARTS INSPECTION.
Aircraft that have complied with Revision 02 of this bulletin do not need any additional action.
3. RECORD OF REVISION
Basic issue: 30/Oct/2019
Revision 01: 05/Nov/2019
Revision 02: 06/Nov/2019
Revision 03: 13/Nov/2019
4. HIGHLIGHTS
The topics, affected pages, and a brief description of the content-related changes introduced by this revision
are presented below.
Revision bars are put in the left margin of each page to show the location of the significant changes. Text
displacement and text format changes are not indicated.
TOPIC/PAGE DESCRIPTION OF REVISION
1. PLANNING INFORMATION / 01 thru 07 Updated instructions.
2. Material Information / 9 thur 11 Updated instructions.
3. Accomplishment Instructions / 13 thru 18, 21,
23, 24, 27, 29, 30, 35, 39, 43, 45 Updated instructions.
TRANSMITTAL LETTER
SB505-55-A004
Page 1 of 1
Copyright © by Embraer S.A. All rights reserved - See title page for details.

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(No text on this page.)

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STABILIZERS - ELEVATOR, AILERON AND RUDDER MASS-BALANCE AND ATTACHMENT PARTS
INSPECTION AND REPLACEMENT
In connection with the use of this document, Embraer does not provide any express or implied warranties and expressly disclaims any
warranty of merchantability or fitness for a particular purpose.
This document contains trade secrets, confidential, proprietary information of Embraer and technical data subject to U.S. Export
Administration Regulation ("EAR") and other countries export control laws and regulations. Diversion contrary to the EAR and other laws
and regulations is strictly forbidden. The above restrictions may apply to data on all pages of this document.
1. PLANNING INFORMATION
A. SB EFFECTIVITY
Aircraft affected:
(1) GROUP 1: AIRCRAFT THAT EMBRAER IDENTIFIED AS BEING MORE SUSCEPTIBLE TO
CORROSION
MODEL SN
EMB-505 'Phenom 300'
50500004, 50500010, 50500012, 50500014, 50500016,
50500017, 50500019, 50500020, 50500022 thru 50500032,
50500034, 50500036 thru 50500043, 50500045 thru
50500047, 50500049 thru 50500052, 50500054, 50500055,
50500057, 50500059, 50500060, 50500062, 50500064 thru
50500068, 50500071 thru 50500075, 50500077, 50500078,
50500080, 50500083 thru 50500094, 50500096, 50500097,
50500099, 50500100, 50500102, 50500104 thru 50500107,
50500109, 50500110, 50500113 thru 50500115, 50500121
thru 50500123, 50500126, 50500127, 50500129 thru
50500137, 50500139 thru 50500143, 50500145, 50500147,
50500148, 50500151 thru 50500162, 50500164 thru
50500168, 50500170 thru 50500172, 50500175, 50500177,
50500178, 50500180, and 50500182.
(2) GROUP 2: AIRCRAFT THAT EMBRAER IDENTIFIED AS BEING LESS SUSCEPTIBLE TO
CORROSION
MODEL SN
EMB-505 'Phenom 300'
50500005 thru 50500009, 50500011, 50500018, 50500021,
50500033, 50500035, 50500044, 50500048, 50500053,
50500056, 50500058, 50500061, 50500063, 50500069,
50500070, 50500076, 50500079, 50500081, 50500082,
50500095, 50500098, 50500101, 50500103, 50500108,
50500111, 50500112, 50500116 thru 50500120, 50500124,
50500125, 50500128, 50500138, 50500144, 50500146,
50500149, 50500150, 50500169, 50500173, 50500174,
50500176, 50500179, and 50500181.
In-production effectivity:
The subject presented in this bulletin does not affect any in-production aircraft.
ALERT
SERVICE BULLETIN
Date:  Oct 30, 2019
Revision No.:  03 - Nov 13, 2019 ALERT
SB505-55-A004
Page 1 of 47
Copyright © by Embraer S.A. All rights reserved - See title page for details.

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B. CONCURRENT REQUIREMENTS 
None.
C. REASON 
(1) HISTORY
Instances have been reported of corrosion in the mass-balance weights of the elevators. The
corrosion may lead to loss of mass or the detach of the mass-balance weights, resulting in a
unbalanced elevator which, in conjunction with some flight conditions, could result in loss of
control of the aircraft.
(2) OBJECTIVE
To inspect the mass-balance weights of the elevators, ailerons and rudder for corrosion and
fragmentation of the mass-balance weights and replace as necessary.
(3) EXPECTED BENEFITS
To guarantee that the aircraft complies with the designed installation requirements.
(4) REVISION HISTORY
(a) Revision 01
– This revision is being issued to include additional instructions to make the inspection
of the Elevator, Aileron and Rudder mass-balance easier using a videoscope, and
include SN 50500181 in the SB effectivity.
(b) Revision 02
– This revision is being issued to include additional instructions in the Accomplishment
instructions and figure 3.
(c) Revision 03
– This revision is being issued to revise the Compliance time and include additional
instructions in the Accomplishment instructions (include criteria for adjustable mass-
balance and improve fixed mass-balance criteria).
D. DESCRIPTION 
(1) PART I - ELEVATOR MASS BALANCE AND ATTACHMENT PARTS INSPECTION
ELEVATOR HORN MASS-BALANCE
Perform the inspection for integrity, corrosion and/or fragmentation of the attaching parts and
mass-balance of the elevator as follows:
1) Clean and weigh the mass-balance:
– If the mass-balance weight is equal to or more than 1047 g, apply EPOXY PRIMER,
GREEN BAC452, TYPE II (MEP 10-059) 17084GEP-LVOC/17085CEH-LVOC and
PAINT,POLYURETHANE HS, WHITE- FS595-17875(B) - 715293 (MEP
10-069) ECL-G-46/K4G1, install the same mass-balance, replace the attachment
parts, and do the elevator static balance as given in Part II Item 1.D.(2). Then, go to
PART III Item 1.D.(2) and PART V Item 1.D.(5), to do the inspection of the aileron and
rudder.
ALERT
SERVICE BULLETIN
SB505-55-A004
Page 2 of 47 ALERT
Date:  Oct 30, 2019
Revision No.:  03 - Nov 13, 2019
Copyright © by Embraer S.A. All rights reserved - See title page for details.

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– If the mass-balance weight is less than 1047 g, replace the mass-balance, apply
EPOXY PRIMER, GREEN BAC452, TYPE II (MEP 10-059) 17084GEP-LVOC/
17085CEH-LVOC and PAINT,POLYURETHANE HS, WHITE- FS595-17875(B) -
715293 (MEP 10-069) ECL-G-46/K4G1, replace the attachment parts, apply interface
SEALANT, POLYSULFIDE, INTERFAYING, CLASS C-12, GRADE B
(MEP09-084) NAFTOSEAL MC 780 C-12 between support and mass-balance and
between support and spar, and do the elevator static balance as given in PART II
Item 1.D.(2). Then, go to PART III Item 1.D.(2) and PART V Item 1.D.(5), to do the
inspection of the aileron and rudder.
To gain access to the work area, it is necessary to remove access panels 347GL, 347EL, 348GR
and 348ER.
ELEVATOR MASS-BALANCE INTERNAL:
Perform the videoscope inspection and in case the material fragmentation (chips, flakes, powder)
is found, remove the mass-balance and do as follows:
1) Clean and weigh the mass-balance:
– If the mass-balance weight is equal to or more than 2695 g (inboard, according to
Figure 5 Det. E) and 1966 g (outboard, according to Figure 5 Det. D), apply EPOXY
PRIMER, GREEN BAC452, TYPE II (MEP 10-059) 17084GEP-LVOC/17085CEH-
LVOC and PAINT,POLYURETHANE HS, WHITE- FS595-17875(B) - 715293 (MEP
10-069) ECL-G-46/K4G1, install the same mass-balance, replace the attachment
parts, and do the elevator static balance as given in PART II Item 1.D.(2). Then, go to
PART III Item 1.D.(2) and PART V Item 1.D.(5), to do the inspection of the aileron and
rudder.
– If the mass-balance weight is less than 2695 g (inboard, according to Figure 5 Det. E)
and 1966 g (outboard, according to Figure 5 Det. D), replace the mass-balance, apply
EPOXY PRIMER, GREEN BAC452, TYPE II (MEP 10-059) 17084GEP-LVOC/
17085CEH-LVOC and PAINT,POLYURETHANE HS, WHITE- FS595-17875(B) -
715293 (MEP 10-069) ECL-G-46/K4G1, replace attachment parts, apply interface
SEALANT, POLYSULFIDE, INTERFAYING, CLASS C-12, GRADE B
(MEP09-084) NAFTOSEAL MC 780 C-12 between support and mass-balance and
between support and spar, and do the elevator static balance as given in PART II
Item 1.D.(2). Then, go to PART III Item 1.D.(2) and PART V Item 1.D.(5), to do the
inspection of the aileron and rudder.
ELEVATOR ADJUSTABLE MASS-BALANCE:
Perform the inspection for integrity, corrosion and/or fragmentation of the attaching parts and
mass-balance of the elevator as follows:
1) Clean and weigh the mass-balance:
– If the mass-balance weight is equal to or more than 80.5 g, apply EPOXY PRIMER,
GREEN BAC452, TYPE II (MEP 10-059) 17084GEP-LVOC/17085CEH-LVOC and
PAINT,POLYURETHANE HS, WHITE- FS595-17875(B) - 715293 (MEP
10-069) ECL-G-46/K4G1, install the same mass-balance, replace the attachment
parts, and do the elevator static balance as given in PART II Item 1.D.(2). Then, go to
PART III Item 1.D.(2) and PART VItem 1.D.(5), to do the inspection of the aileron and
rudder.
– If the mass-balance weight is less than 80.5 g, replace the mass-balance, apply
EPOXY PRIMER, GREEN BAC452, TYPE II (MEP 10-059) 17084GEP-LVOC/
17085CEH-LVOC and PAINT,POLYURETHANE HS, WHITE- FS595-17875(B) -
715293 (MEP 10-069) ECL-G-46/K4G1, replace attachment parts, and do the
ALERT
SERVICE BULLETIN
Date:  Oct 30, 2019
Revision No.:  03 - Nov 13, 2019 ALERT
SB505-55-A004
Page 3 of 47
Copyright © by Embraer S.A. All rights reserved - See title page for details.

### Page 6

elevator static balance as given in PART II Item 1.D.(2). Then, go to PART III  tem
1.D.(2) and PART V Item 1.D.(5), to do the inspection of the aileron and rudder.
NOTE: See download_center > Executive Jets > Maintenance > Service Bulletins Material
Support > PHENOM > SB505-55-A004 - Reference Pictures, for examples of
acceptable/unacceptable conditions and in case of doubt report to Embraer
(2) PART II - ELEVATOR MASS BALANCE AND ATTACHMENT PARTS REPLACEMENT
PART II of this bulletin consists in:
– Replace the attachment parts
– Replace or install the same Elevator Mass-Balance, apply EPOXY PRIMER, GREEN
BAC452, TYPE II (MEP 10-059) 17084GEP-LVOC/17085CEH-LVOC and
PAINT,POLYURETHANE HS, WHITE- FS595-17875(B) - 715293 (MEP 10-069) ECL-
G-46/K4G1, according to criteria of the PART I.
– Do the elevator static balancing.
To gain access to the work area, it is necessary to remove access panels 347GL, 347EL, 348GR
and 348ER.
(3) PART III - AILERON MASS BALANCE AND ATTACHMENT PARTS INSPECTION
Perform the videoscope inspection and in case the material fragmentation (chips, flakes, powder)
is found, remove the mass-balance and do as follows:
1) Clean and weigh the mass-balance:
– If the mass-balance weight is equal to or more than 1625 g , apply EPOXY PRIMER,
GREEN BAC452, TYPE II (MEP 10-059) 17084GEP-LVOC/17085CEH-LVOC and
PAINT,POLYURETHANE HS, WHITE- FS595-17875(B) - 715293 (MEP
10-069) ECL-G-46/K4G1, install the same mass-balance, replace the attachment
parts, and do the aileron static balance as given in PART IV Item 1.D.(4).
– If the mass-balance weight is less than 1625 g, replace the mass-balance, apply
EPOXY PRIMER, GREEN BAC452, TYPE II (MEP 10-059) 17084GEP-LVOC/
17085CEH-LVOC and PAINT,POLYURETHANE HS, WHITE- FS595-17875(B) -
715293 (MEP 10-069) ECL-G-46/K4G1 , replace attachment parts, and do the aileron
static balance as given in PART IV Item 1.D.(4).
NOTE: See download_center > Executive Jets > Maintenance > Service Bulletins Material
Support > PHENOM > SB505-55-A004 - Reference Pictures, for examples of
acceptable/unacceptable conditions and in case of doubt report to Embraer
To gain access to the work area, it is necessary to remove the Aileron Surface Horn Covers in
Zones 572 and 672.
(4) PART IV - AILERON MASS BALANCE AND ATTACHMENT PARTS REPLACEMENT
PART IV of this bulletin consists in:
– Replace the attachment parts
– Replace or install the same Aileron Mass-Balance, apply EPOXY PRIMER, GREEN
BAC452, TYPE II (MEP 10-059) 17084GEP-LVOC/17085CEH-LVOC and
PAINT,POLYURETHANE HS, WHITE- FS595-17875(B) - 715293 (MEP 10-069) ECL-
G-46/K4G1, according to criteria of the PART III.
ALERT
SERVICE BULLETIN
SB505-55-A004
Page 4 of 47 ALERT
Date:  Oct 30, 2019
Revision No.:  03 - Nov 13, 2019
Copyright © by Embraer S.A. All rights reserved - See title page for details.

### Page 7

– Do the aileron static balancing
To gain access to the work area, it is necessary to remove the Aileron Surface Horn Covers in
Zones 572 and 672.
(5) PART V - RUDDER MASS BALANCE AND ATTACHMENT PARTS INSPECTION
RUDDER ADJUSTABLE MASS-BALANCE:
Perform the inspection for integrity, corrosion and/or fragmentation of the attaching parts and
Mass Balance of the Rudder as follows:
1) Clean and weigh the mass-balance:
– If the mass-balance weight is equal to or more than 414 g, apply EPOXY PRIMER,
GREEN BAC452, TYPE II (MEP 10-059) 17084GEP-LVOC/17085CEH-LVOC and
PAINT,POLYURETHANE HS, WHITE- FS595-17875(B) - 715293 (MEP
10-069) ECL-G-46/K4G1, install the same mass-balance, replace the attachment
parts, and do the rudder static balance as given in PART VI Item 1.D.(6).
– If the mass-balance weight is less than 414 g, replace the mass-balance, apply
EPOXY PRIMER, GREEN BAC452, TYPE II (MEP 10-059) 17084GEP-LVOC/
17085CEH-LVOC and PAINT,POLYURETHANE HS, WHITE- FS595-17875(B) -
715293 (MEP 10-069) ECL-G-46/K4G1, replace attachment parts, and do the rudder
static balance as given in PART VI Item 1.D.(6).
RUDDER MASS-BALANCE INTERNAL:
Perform the videoscope inspection and in case of material fragmentation (chips, flakes, powder)
is found, remove the Mass-Balance and do as follows:
1) Clean and weigh the mass-balance:
– if the mass-balance weight is equal to or more than 4392 g, install the same mass-balance,
apply EPOXY PRIMER, GREEN BAC452, TYPE II (MEP 10-059) 17084GEP-LVOC/
17085CEH-LVOC and PAINT,POLYURETHANE HS, WHITE- FS595-17875(B) - 715293
(MEP 10-069) ECL-G-46/K4G1, replace attachment parts, and do the rudder static balance
as given in PART VI Item 1.D.(6).
– If the mass-balance weight is less than 4392 g, replace the mass-balance, apply EPOXY
PRIMER, GREEN BAC452, TYPE II (MEP 10-059) 17084GEP-LVOC/17085CEH-LVOC
and PAINT,POLYURETHANE HS, WHITE- FS595-17875(B) - 715293 (MEP 10-069) ECL-
G-46/K4G1 , replace attachment parts, and do the rudder static balance as given in PART
VI Item 1.D.(6).
NOTE: See download_center > Executive Jets > Maintenance > Service Bulletins Material
Support > PHENOM > SB505-55-A004 - Reference Pictures, for examples of
acceptable/unacceptable conditions and in case of doubt report to Embraer
To gain access to the work area, it is necessary to remove access panel 336EL.
(6) PART VI - RUDDER MASS BALANCE AND ATTACHMENT PARTS REPLACEMENT
PART VI of this bulletin consists in:
– Replace the attachment parts
– Replace or install the same Rudder Mass-Balance, apply EPOXY PRIMER, GREEN
BAC452, TYPE II (MEP 10-059) 17084GEP-LVOC/17085CEH-LVOC and
ALERT
SERVICE BULLETIN
Date:  Oct 30, 2019
Revision No.:  03 - Nov 13, 2019 ALERT
SB505-55-A004
Page 5 of 47
Copyright © by Embraer S.A. All rights reserved - See title page for details.

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PAINT,POLYURETHANE HS, WHITE- FS595-17875(B) - 715293 (MEP 10-069) ECL-
G-46/K4G1, according to criteria of the PART V.
– Do the rudder static balancing
To gain access to the work area, it is necessary to remove access panel 336EL.
(7) PART VII - ADDITIONAL ACTION
Aircraft that have complied with the original issue and Revision 01 of this bulletin need to comply
with additional action, as follows:
– PART I - ELEVATOR MASS BALANCE AND ATTACHMENT PARTS INSPECTION.
– PART III - AILERON MASS BALANCE AND ATTACHMENT PARTS INSPECTION.
– PART V - RUDDER MASS BALANCE AND ATTACHMENT PARTS INSPECTION.
Aircraft that have complied with Revision 02 of this bulletin do not need any additional action.
E. COMPLIANCE 
(1) GROUP 1: AIRCRAFT THAT EMBRAER IDENTIFIED AS BEING MORE SUSCEPTIBLE TO
CORROSION:
– Embraer recommends that this bulletin be accomplished within the next 05 flight hours or
03 days, whichever occurs first.
(2) GROUP 2: AIRCRAFT THAT EMBRAER IDENTIFIED AS BEING LESS SUSCEPTIBLE TO
CORROSION:
– Embraer recommends that this bulletin be accomplished within the next 100 flight hours or
60 days, whichever occurs first.
F. APPROVAL 
The changes to the type design specified in this SB have been approved by Agência Nacional de
Aviação Civil (ANAC).
G. ESTIMATED MANPOWER 
This estimate is for direct labor only, performed by experienced personnel, and does not include the
time to plan, prepare or inspect the work.
It is assumed that all the tools, parts, and other means are promptly available when necessary.
This estimate does not include the sealant, paint or adhesive curing time.
(1) APPLICABLE TO PART I - ELEVATOR MASS BALANCE AND ATTACHMENT PARTS
INSPECTION
– Access opening: 2.0 man-hours.
– Inspection: 0.5 man-hours.
– Access closure: 2.0 man-hours.
– Test: None.
(2) APPLICABLE TO PART II - ELEVATOR MASS BALANCE AND ATTACHMENT PARTS
REPLACEMENT
ALERT
SERVICE BULLETIN
SB505-55-A004
Page 6 of 47 ALERT
Date:  Oct 30, 2019
Revision No.:  03 - Nov 13, 2019
Copyright © by Embraer S.A. All rights reserved - See title page for details.

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– Access opening: 12.0 man-hours.
– Modification: 36.0 man-hours.
– Access closure: 18.0 man-hours.
– Test: 10.0 man-hours.
(3) APPLICABLE TO PART III - AILERON MASS BALANCE AND ATTACHMENT PARTS
INSPECTION
– Access opening: 0.5 man-hours.
– Inspection: 0.5 man-hours.
– Access closure: 0.5 man-hours.
– Test: None.
(4) APPLICABLE TO PART IV - AILERON MASS BALANCE AND ATTACHMENT PARTS
REPLACEMENT
– Access opening: 2.0 man-hours.
– Modification: 1.0 man-hours.
– Access closure: 2.0 man-hours.
– Test: None.
(5) APPLICABLE TO PART V - RUDDER MASS BALANCE AND ATTACHMENT PARTS
INSPECTION
– Access opening: 1.0 man-hours.
– Inspection: 1.0 man-hours.
– Access closure: 1.0 man-hours.
– Test: None.
(6) APPLICABLE TO PART VI - RUDDER MASS BALANCE AND ATTACHMENT PARTS
REPLACEMENT
– Access opening: 16.0 man-hours.
– Modification: 4.0 man-hours.
– Access closure: 20.0 man-hours.
– Test: 8.0 man-hours.
H. COMMUNICATIONS TO EMBRAER 
EMBRAER requests that the results found during these inspections be informed to your local
EMBRAER representatives or via e-mail to "contact.center@embraer.com".
I. REFERENCES 
AMM 505/( ) Aircraft Maintenance Manual PART II - 20-00-00 - STANDARDPRACTICES-AIRFRAME.
ALERT
SERVICE BULLETIN
Date:  Oct 30, 2019
Revision No.:  03 - Nov 13, 2019 ALERT
SB505-55-A004
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Copyright © by Embraer S.A. All rights reserved - See title page for details.

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AMM 505/( ) Aircraft Maintenance Manual PART II - 27-21-01 - FLIGHT CONTROLS.
AMM 505/( ) Aircraft Maintenance Manual PART II - 51-60-01, 51-60-02, and 51-60-03 -STANDARD PRACTICES AND STRUCTURES - GENERAL.
AMM 505/( ) Aircraft Maintenance Manual PART II - 55-23-22, 55-23-25, and 55-43-22 -STABILIZERS.
SRM 505/( )
Structural Repair Manual Part II - 51-21-03, 51-21-05, 51-21-07, 51-22-01,
51-22-05, 51-41-01, 51-42-02, and 51-71-19 - STANDARD PRACTICES
AND STRUCTURES - GENERAL.
J. PUBLICATIONS AFFECTED 
None.
ALERT
SERVICE BULLETIN
SB505-55-A004
Page 8 of 47 ALERT
Date:  Oct 30, 2019
Revision No.:  03 - Nov 13, 2019
Copyright © by Embraer S.A. All rights reserved - See title page for details.

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2. MATERIAL INFORMATION 
A. MATERIAL - PRICE AND AVAILABILITY 
(1) MATERIAL AVAILABLE FROM EMBRAER
None.
B. INDUSTRY SUPPORT INFORMATION 
(1) WARRANTY COVERAGE
Service Bulletin will be at no charge to the customer when SB Incorporation is performed at an
EMBRAER Group's Service Centers or at an EMBRAER-AUTHORIZED Service Center.
C. MATERIAL NECESSARY FOR EACH AIRCRAFT 
The expendable or consumable materials presented in the AMM Tasks referred to in this bulletin can
be necessary for its accomplishment. Examine the operator’s inventories to make sure all materials are
available.
(1) TOP KITS AND KITS
None
(2) MATERIAL TO BE PROCURED
(a) Parts
The parts below should be ordered as spares from Embraer.
Applicable to Figure 3, Figure 4, Figure 5 and Figure 6 - ELEVATOR
NEW PN DESCRIPTION OLD PN QTY DISP/Notes
505-11215-003 Threaded Bar 505-11215-003 04 7
PE915109-L33 Mass-Balance PE915109-L33 02 7/[1]
NAS1802-3-9P Fasteners NAS1801-3-9 16 3
NAS1102E3-22 Fasteners NAS1102-3-24 04 3
PE915109-L42 Mass-Balance PE915109-L42 02 7/[1]
NAS1802-3-20P or
NAS1802-3-20 Bolt NAS1801-3-20 24 3
NAS1149C0316R Washer NAS1149C0316R 18 3
505-11062-001 Mass-Balance 505-11062-001 02 7
PE915109-L41 Mass-Balance PE915109-L41 02 7/[1]
PE915109-L40 Mass-Balance PE915109-L40 02 7/[1]
UAB130−EU05−03AC Rivet Blind UniversalHead UAB130−EU05−03AC 192 3/[2]
[1] Apply EPOXY PRIMER, GREEN BAC452, TYPE II (MEP 10-059) 17084GEP-LVOC/17085CEH-LVOC
and PAINT,POLYURETHANE HS, WHITE- FS595-17875(B) - 715293 (MEP 10-069) ECL-G-46/K4G1.
[2] If necessary use this rivet instead of UAB130-EU05-03AC.
ALERT
SERVICE BULLETIN
Date:  Oct 30, 2019
Revision No.:  03 - Nov 13, 2019 ALERT
SB505-55-A004
Page 9 of 47
Copyright © by Embraer S.A. All rights reserved - See title page for details.

### Page 12

Applicable to Figure 8 - AILERON
NEW PN DESCRIPTION OLD PN QTY DISP/Notes
PE915109-L31 Adjustable Massbalance Weight - 02 7/[1]
505-14628-001 Adjustable Massbalance Weight - A.R. 7
NAS1102E3-52 Screw - 06 7
NAS1149C0332R Washer - 06 7
MS21043-3 Nut - 06 7
[1] Apply EPOXY PRIMER, GREEN BAC452, TYPE II (MEP 10-059) 17084GEP-LVOC/17085CEH-LVOC
and PAINT,POLYURETHANE HS, WHITE- FS595-17875(B) - 715293 (MEP 10-069) ECL-G-46/K4G1.
Applicable to Figure 11, Figure 13 - RUDDER
NEW PN DESCRIPTION OLD PN QTY DISP/Notes
PE915109-L27 Adjustable Massbalance Weight - A.R. 7/[1]
505-10439-001 Pin Adjustment - 02 7
MS21043-5 Nut - 02 7
NAS1149C0532R Washer - 04 7
UAB130-EU05-02AC Rivet BlindCountersunk Head - 28 7
UABP-EU05-02AC Rivet, Blind UniversalHead - 15 7
NAS1149C0432R Washer - 03 7
NAS577B4A Nut Barrel - 03 3
NAS578-4B Nut Retainer, Barrel - 03 3
UAB130-EU06-02AC Rivet, BlindCountersunk Head - A.R. -/[2]
UABP-EU06-02AC Rivet, Blind UniversalHead - A.R. -/[2]
PE915109-L26 Mass-BalanceTungsten - 01 7/[1]
[1] Apply EPOXY PRIMER, GREEN BAC452, TYPE II (MEP 10-059) 17084GEP-LVOC/17085CEH-LVOC
and PAINT,POLYURETHANE HS, WHITE- FS595-17875(B) - 715293 (MEP 10-069) ECL-G-46/K4G1.
[2] If necessary, use oversize rivets
(b) Consumable Materials
The material below or equivalent, required for the accomplishment of this bulletin, should be
procured from the operator’s inventories or from a local supplier.
ALERT
SERVICE BULLETIN
SB505-55-A004
Page 10 of 47 ALERT
Date:  Oct 30, 2019
Revision No.:  03 - Nov 13, 2019
Copyright © by Embraer S.A. All rights reserved - See title page for details.

### Page 13

Applicable to 1.A. SB EFFECTIVITY
NEW PN DESCRIPTION OLD PN QTY DISP
Rhodiasolv E-23
Solvent for Manual
Cleaning (MEP
13-073) Rhodiasolv
E-23
- AR 6
PR2050B1/2
Fast-Curing
Polythioether Sealant
(MEP
09-083) PR2050B1/2
- AR 6
F-925-PINK-TORQUE
SEAL
Pink Torque Seal (MEP
09-068) F-925 - AR 6
DP-460
ADHESIVE,EPOXY,TY
PE IV (MEP
09-066) DP-460
- AR 6
Rhodiasolv MEP 13-073 - AR 6
Cor-Ban 27L
MEP 09-075 -
Corrosion- Inhibiting
Compound
- AR 6
PR2050B1/2
MEP 09-083 - Fast-
Curing Polythioether
Sealant
- AR 6
EA9394 MEP 09-066 - EPOXYADHESIVE - AR 6
17084GEP-LVOC/
17085CEH-LVOC
MEP10-059 - EPOXY
PRIMER - AR 6
ECL-G-46/K4G1
MEP 10-069 - Paint,
Polyurethane HS,
White -
FS595-17875(B)
- AR 6
DISPOSITION: 3 = Replace part bearing OLD PN with part bearing NEW PN
6 = Apply as required
7 = Replace with part bearing same PN
QUANTITY: AR = As Required
D. MATERIAL NECESSARY FOR EACH SPARE 
None.
E. REIDENTIFIED PARTS 
None.
F. TOOLING - PRICE AND AVAILABILITY 
The Ground Support Equipment (GSE) PN AGE-04715-401 and PN AGE-05468-401 presented in the
AMM tasks below, referred to in this bulletin, are necessary for its accomplishment.
ALERT
SERVICE BULLETIN
Date:  Oct 30, 2019
Revision No.:  03 - Nov 13, 2019 ALERT
SB505-55-A004
Page 11 of 47
Copyright © by Embraer S.A. All rights reserved - See title page for details.

### Page 14

– AMM TASK 51-60-02-720-801-A/500 - Elevator Static Balancing
– AMM TASK 51-60-01-720-801-A/500 - Aileron Static Balancing
– AMM TASK 51-60-03-720-801-A/500 - Rudder Static Balancing
ALERT
SERVICE BULLETIN
SB505-55-A004
Page 12 of 47 ALERT
Date:  Oct 30, 2019
Revision No.:  03 - Nov 13, 2019
Copyright © by Embraer S.A. All rights reserved - See title page for details.

### Page 15

3. ACCOMPLISHMENT INSTRUCTIONS 
The steps below outline the general accomplishment instructions.
The detailed sequence is included in the respective figure, when necessary.
A. Make sure that the aircraft is safe for maintenance. Refer to AMM TASK 20-00-00-910-801-A/200  -
Aircraft Maintenance Safety Procedures.
B. PART I - ELEVATOR MASS BALANCE AND ATTACHMENT PARTS INSPECTION
(1) Remove and retain the Left-Hand (LH) and Right-Hand (RH) Elevator-Horn Leading-Edge Fairing
and Elevator Mass-Balance Weight Fairings. Refer to the applicable AMM TASK
55-23-22-000-801-A/400 - Elevator-Horn Leading-Edge Fairing - Removal and AMM TASK
55-23-25-000-801-A/400 - Elevator Mass-Balance Weight Fairings - Removal.
(2) Inspect the Elevator Mass-Balances according to Figure 1 , Figure 2 and as follows:
(a) Inspect for integrity, corrosion and/or fragmentation of the attaching parts and mass-
balance of the elevator Horn Mass-Balance according to Figure 1 and as follows:
1 Remove the Elevator Leading edge according to Figure 3.
2 Clean ( SRM PART 2 51-22-01  - SURFACE FINISHING AND PROTECTION -
CLEANING) and weigh the mass-balance:
a If the mass-balance weight is equal to or more than 1047 g, apply EPOXY
PRIMER, GREEN BAC452, TYPE II (MEP 10-059) 17084GEP-LVOC/
17085CEH-LVOC and PAINT,POLYURETHANE HS, WHITE- FS595-17875(B)
- 715293 (MEP 10-069) ECL-G-46/K4G1, install the same mass-balance, and
replace the attachment parts, according to PART II of this Bulletin.
b If the mass-balance weight is less than 1047 g, replace the mass-balance, apply
EPOXY PRIMER, GREEN BAC452, TYPE II (MEP 10-059) 17084GEP-LVOC/
17085CEH-LVOC and PAINT,POLYURETHANE HS, WHITE- FS595-17875(B)
- 715293 (MEP 10-069) ECL-G-46/K4G1, replace attachment parts, apply
interface SEALANT, POLYSULFIDE, INTERFAYING, CLASS C-12, GRADE B
(MEP09-084) NAFTOSEAL MC 780 C-12 between support and mass-balance
and between support and spar, according to PART II of this Bulletin.
(b) Perform the videoscope inspection in the Internal Mass-Balance according to Figure 2 and
as follows:
1 Drill access hole with diameter equal to 6.3 mm (0.25 in), refer to DET B.
2 If there is no sign of material fragmentation no action is required.
3 If there is sign of material fragmentation (chips, flakes, powder) on the Elevator mass-
balance remove the mass-balance and do as follows:
a Clean (SRM PART 2 51-22-01  - SURFACE FINISHING AND PROTECTION -
CLEANING) and weigh the mass-balance:
1) If the mass-balance weight is equal to or more than 2695 g (inboard,
according to Figure 5 Det. E) and 1966 g (outboard, according to Figure 5
Det. D), apply EPOXY PRIMER, GREEN BAC452, TYPE II (MEP
10-059) 17084GEP-LVOC/17085CEH-LVOC and
PAINT,POLYURETHANE HS, WHITE- FS595-17875(B) - 715293 (MEP
10-069) ECL-G-46/K4G1, install the same mass-balance, and replace the
attachment parts, according to PART II of this Bulletin.
ALERT
SERVICE BULLETIN
Date:  Oct 30, 2019
Revision No.:  03 - Nov 13, 2019 ALERT
SB505-55-A004
Page 13 of 47
Copyright © by Embraer S.A. All rights reserved - See title page for details.

### Page 16

2) If the mass-balance weight is less than 2695 g (inboard, according to
Figure 5 Det. E) and 1966 g (outboard, according to Figure 5 Det. D),
replace the mass-balance, apply EPOXY PRIMER, GREEN BAC452,
TYPE II (MEP 10-059) 17084GEP-LVOC/17085CEH-LVOC and
PAINT,POLYURETHANE HS, WHITE- FS595-17875(B) - 715293 (MEP
10-069) ECL-G-46/K4G1, replace attachment parts, apply interface
SEALANT, POLYSULFIDE, INTERFAYING, CLASS C-12, GRADE B
(MEP09-084) NAFTOSEAL MC 780 C-12 between support and mass-
balance and between support and spar, according to PART II of this
Bulletin.
4 Cover the access hole. Refer to SRM PART 2 51-71-19 - COMPOSITE - COVERAGE
FOR HOLES REPLACEMENT.
NOTE: See "download_center > Executive Jets > Maintenance > Service Bulletins
Material Support > PHENOM > SB505-55-A004 - Reference Pictures", for
examples of acceptable/unacceptable conditions. In case of doubt report to
EMBRAER representatives or via e-mail to "contact.center@embraer.com".
(c) Inspect for integrity, corrosion and/or fragmentation of the attaching parts and mass-
balance of the Elevator adjustable mass-balance according to Figure 1 and as follows:
1 Clean ( SRM PART 2 51-22-01  - SURFACE FINISHING AND PROTECTION -
CLEANING) and weigh the mass-balance:
a If the mass-balance weight is equal to or more than 80.5 g, apply EPOXY
PRIMER, GREEN BAC452, TYPE II (MEP 10-059) 17084GEP-LVOC/
17085CEH-LVOC and PAINT,POLYURETHANE HS, WHITE- FS595-17875(B)
- 715293 (MEP 10-069) ECL-G-46/K4G1, install the same mass-balance, and
replace the attachment parts, according to PART II of this Bulletin.
b If the mass-balance weight is less than 80.5 g, replace the mass-Balance, apply
EPOXY PRIMER, GREEN BAC452, TYPE II (MEP 10-059) 17084GEP-LVOC/
17085CEH-LVOC and PAINT,POLYURETHANE HS, WHITE- FS595-17875(B)
- 715293 (MEP 10-069) ECL-G-46/K4G1, and replace the attachments parts,
according to PART II of this Bulletin.
NOTE: See "download_center > Executive Jets > Maintenance > Service
Bulletins Material Support > PHENOM > SB505-55-A004 - Reference
Pictures", for examples of acceptable/unacceptable conditions. In case
of doubt report to EMBRAER representatives or via e-mail to
"contact.center@embraer.com".
(3) Install the Elevator-Horn Leading-Edge Fairing and Elevator Mass-Balance Weight Fairings.
Refer to the applicable AMM TASK 55-23-22-400-801-A/400  - Elevator-Horn Leading-Edge
Fairing - Installation and AMM TASK 55-23-25-400-801-A/400  - Elevator Mass-Balance Weight
Fairings - Installation.
(4) Put the aircraft back to its normal condition. Refer to AMM TASK 20-00-00-910-801-A/200  -
Aircraft Maintenance Safety Procedures.
(5) Enter the accomplishment of PART I of this service bulletin in the applicable documents.
(6) EMBRAER requests that the results found during these inspections be informed to your local
EMBRAER representatives or via e-mail to "contact.center@embraer.com".
(7) Fill out the "Service Bulletin Implementation and Evaluation" form and click on "Submit by Email"
button. To find the form, log in to the FlyEmbraer portal (http://www.flyembraer.com) and go to:
ALERT
SERVICE BULLETIN
SB505-55-A004
Page 14 of 47 ALERT
Date:  Oct 30, 2019
Revision No.:  03 - Nov 13, 2019
Copyright © by Embraer S.A. All rights reserved - See title page for details.

### Page 17

"Technical Publication > Technical Data > Service Bulletin > Front Matter > SB505 - SERVICE
BULLETIN IMPLEMENTATION AND EVALUATION FORM".
C. PART II - ELEVATOR MASS BALANCE AND ATTACHMENT PARTS REPLACEMENT
(1) Remove the static-discharge rods of the elevator surfaces from their bases.
(2) Remove the elevator surface in accordance with AMM TASK 27-31-01-000-801-A/400 - Elevator
Surface - Removal.
(3) Clean the work area according to SRM PART 2 51-22-01/1 - SURFACE FINISHING AND
PROTECTION - CLEANING.
(4) Remove the elevator horn leading edge fairings 347EL and 348ER, as applicable, according to
AMM TASK 55-23-22-000-801-A/400 - Elevator-Horn Leading-Edge Fairing - Removal.
(5) Replace the attachment parts and replace or install the same Elevator Mass-Balance and apply
EPOXY PRIMER, GREEN BAC452, TYPE II (MEP 10-059) 17084GEP-LVOC/17085CEH-LVOC
and PAINT,POLYURETHANE HS, WHITE- FS595-17875(B) - 715293 (MEP 10-069) ECL-G-46/
K4G1, according to criteria of the PART I, and according to Figure 3 , Figure 4 , Figure 5 , and
Figure 6.
(6) Install the elevator horn leading edge fairings 347EL and 348ER, as applicable, according to
AMM TASK 55-23-22-400-801-A/400 - Elevator-Horn Leading-Edge Fairing - Installation.
(7) Apply a coat of paint to the rivets and bolts head in accordance with SRM PART 2 51-22-05/1 -
SURFACE FINISHING AND PROTECTION - TOPCOAT APPLICATION.
(8) Do the elevator static balancing in accordance with AMM TASK 51-60-02-720-801-A/500 -
Elevator Static Balancing.
(9) Install the elevator surfaces to aircraft in accordance with AMM TASK 27-31-01-400-801- A/400 -
Elevator Surface - Installation.
NOTE: Make sure that the tests described in the “Job Close-Up” topic of the installation task is
performed according to the instructions contained in the ″Aircraft Maintenance Manual″.
(10) Install the static-discharge rods of the elevator surfaces from their bases.
(11) Put the aircraft back to its normal condition. Refer to AMM TASK 20-00-00-910-801-A/200  -
Aircraft Maintenance Safety Procedures.
(12) Enter the accomplishment of PART II of this service bulletin in the applicable documents.
(13) EMBRAER requests that the results found during these inspections be informed to your local
EMBRAER representatives or via e-mail to "contact.center@embraer.com".
(14) Fill out the "Service Bulletin Implementation and Evaluation" form and click on "Submit by Email"
button. To find the form, log in to the FlyEmbraer portal (http://www.flyembraer.com) and go to:
"Technical Publication > Technical Data > Service Bulletin > Front Matter > SB505 - SERVICE
BULLETIN IMPLEMENTATION AND EVALUATION FORM".
D. PART III - AILERON MASS BALANCE AND ATTACHMENT PARTS INSPECTION
(1) Perform the videoscope inspection in the Aileron Mass-Balance according to Figure 7, as follows.
(a) If there is no sign of material fragmentation (chips, flakes, powder) on the Aileron mass-
balance no action is required.
(b) If there is sign of material fragmentation (chips, flakes, powder) on the Aileron mass-
balance, do as follows:
ALERT
SERVICE BULLETIN
Date:  Oct 30, 2019
Revision No.:  03 - Nov 13, 2019 ALERT
SB505-55-A004
Page 15 of 47
Copyright © by Embraer S.A. All rights reserved - See title page for details.

### Page 18

1) Remove the Aileron Mass-Balance according to Figure 8.
2) Clean ( SRM PART 2 51-22-01  - SURFACE FINISHING AND PROTECTION -
CLEANING) and weigh the mass-balance:
– If the mass-balance weight is equal to or more than 1625 g, apply EPOXY
PRIMER, GREEN BAC452, TYPE II (MEP 10-059) 17084GEP-LVOC/
17085CEH-LVOC and PAINT,POLYURETHANE HS, WHITE- FS595-17875(B)
- 715293 (MEP 10-069) ECL-G-46/K4G1, install the same mass-balance, and
replace the attachment parts, according to PART IV of this Bulletin.
– If the mass-balance weight is less than 1625 g, replace the mass-balance, apply
EPOXY PRIMER, GREEN BAC452, TYPE II (MEP 10-059) 17084GEP-LVOC/
17085CEH-LVOC and PAINT,POLYURETHANE HS, WHITE- FS595-17875(B)
- 715293 (MEP 10-069) ECL-G-46/K4G1, and replace attachment parts
according to PART IV of this Bulletin.
NOTE: See "download_center > Executive Jets > Maintenance > Service Bulletins
Material Support > PHENOM > SB505-55-A004 - Reference Pictures", for
examples of acceptable/unacceptable conditions. In case of doubt report to
EMBRAER representatives or via e-mail to "contact.center@embraer.com".
(2) Put the aircraft back to its normal condition. Refer to AMM TASK 20-00-00-910-801-A/200  -
Aircraft Maintenance Safety Procedures.
(3) Enter the accomplishment of PART III of this service bulletin in the applicable documents.
(4) EMBRAER requests that the results found during these inspections be informed to your local
EMBRAER representatives or via e-mail to "contact.center@embraer.com".
(5) Fill out the "Service Bulletin Implementation and Evaluation" form and click on "Submit by Email"
button. To find the form, log in to the FlyEmbraer portal (http://www.flyembraer.com) and go to:
"Technical Publication > Technical Data > Service Bulletin > Front Matter > SB505 - SERVICE
BULLETIN IMPLEMENTATION AND EVALUATION FORM".
E. PART IV - AILERON MASS BALANCE AND ATTACHMENT PARTS REPLACEMENT
(1) Remove and retain the Left-Hand (LH) and Right-Hand (RH) Aileron Surface Horn Covers in
Zones 572 and 672.
(2) Replace or install the same Aileron Mass-Balance, apply EPOXY PRIMER, GREEN BAC452,
TYPE II (MEP 10-059) 17084GEP-LVOC/17085CEH-LVOC and PAINT,POLYURETHANE HS,
WHITE- FS595-17875(B) - 715293 (MEP 10-069) ECL-G-46/K4G1, according to criteria of the
PART III, and according to Figure 8.
(3) Do the Aileron Static Balancing according to AMM TASK 51-60-01-720-801-A/500 - Aileron Static
Balancing
(4) Put the aircraft back to its normal condition. Refer to AMM TASK 20-00-00-910-801-A/200  -
Aircraft Maintenance Safety Procedures.
(5) Enter the accomplishment of PART IV of this service bulletin in the applicable documents.
(6) EMBRAER requests that the results found during these inspections be informed to your local
EMBRAER representatives or via e-mail to "contact.center@embraer.com".
(7) Fill out the "Service Bulletin Implementation and Evaluation" form and click on "Submit by Email"
button. To find the form, log in to the FlyEmbraer portal (http://www.flyembraer.com) and go to:
"Technical Publication > Technical Data > Service Bulletin > Front Matter > SB505 - SERVICE
BULLETIN IMPLEMENTATION AND EVALUATION FORM".
ALERT
SERVICE BULLETIN
SB505-55-A004
Page 16 of 47 ALERT
Date:  Oct 30, 2019
Revision No.:  03 - Nov 13, 2019
Copyright © by Embraer S.A. All rights reserved - See title page for details.

### Page 19

F. PART V - RUDDER MASS BALANCE AND ATTACHMENT PARTS INSPECTION
(1) Remove and retain the Rudder Mass Balance Weight Fairings. Refer to AMM TASK
55-43-22-000-801-A/400 - Rudder Mass Balance Weight Fairings - Removal.
(2) Inspect for integrity, corrosion and/or fragmentation of the attaching parts and mass-balance of
the Rudder Adjustable Mass-Balances according to Figure 9, as follows.
(a) Clean (SRM PART 2 51-22-01  - SURFACE FINISHING AND PROTECTION - CLEANING)
and weigh the mass-balance:
1 If the mass-balance weight is equal to or more than 414 g, apply EPOXY PRIMER,
GREEN BAC452, TYPE II (MEP 10-059) 17084GEP-LVOC/17085CEH-LVOC and
PAINT,POLYURETHANE HS, WHITE- FS595-17875(B) - 715293 (MEP
10-069) ECL-G-46/K4G1, install the same mass-balance, and replace the attachment
parts, according to PART VI of this Bulletin.
2 If the mass-balance weight is less than 414 g, replace the Mass Balance, apply
EPOXY PRIMER, GREEN BAC452, TYPE II (MEP 10-059) 17084GEP-LVOC/
17085CEH-LVOC and PAINT,POLYURETHANE HS, WHITE- FS595-17875(B) -
715293 (MEP 10-069) ECL-G-46/K4G1, and replace the Attachment Parts, according
to PART VI of this Bulletin.
NOTE: See download_center > Executive Jets > Maintenance > Service Bulletins
Material Support > PHENOM > SB505-55-A004 - Reference Pictures, for
examples of acceptable/unacceptable conditions and in case of doubt report
to Embraer
(3) Perform the videoscope inspection in the Rudder Internal Mass-Balance according to Figure 10,
as follows.
(a) If there is no sign of material fragmentation no action is required.
(b) If there is sign of material fragmentation on the mass-balance, do as follows:
1 Remove the Rudder Tip Rib according to Figure 12
2 Clean ( SRM PART 2 51-22-01  - SURFACE FINISHING AND PROTECTION -
CLEANING) and weigh the mass-balance:
a If the mass-balance weight is equal to or more than 4392 g, apply EPOXY
PRIMER, GREEN BAC452, TYPE II (MEP 10-059) 17084GEP-LVOC/
17085CEH-LVOC and PAINT,POLYURETHANE HS, WHITE- FS595-17875(B)
- 715293 (MEP 10-069) ECL-G-46/K4G1, install the same mass-balance, and
replace the attachment parts, according to PART VI of this Bulletin.
b If the mass-balance weight is less than 4392 g, replace the Mass Balance,
apply EPOXY PRIMER, GREEN BAC452, TYPE II (MEP 10-059) 17084GEP-
LVOC/17085CEH-LVOC and PAINT,POLYURETHANE HS, WHITE-
FS595-17875(B) - 715293 (MEP 10-069) ECL-G-46/K4G1, and replace
Attachment Parts, according to PART VI of this Bulletin.
NOTE: See download_center > Executive Jets > Maintenance > Service
Bulletins Material Support > PHENOM > SB505-55-A004 - Reference
Pictures, for examples of acceptable/unacceptable conditions and in
case of doubt report to Embraer
(4) Put the aircraft back to its normal condition. Refer to AMM TASK 20-00-00-910-801-A/200  -
Aircraft Maintenance Safety Procedures.
ALERT
SERVICE BULLETIN
Date:  Oct 30, 2019
Revision No.:  03 - Nov 13, 2019 ALERT
SB505-55-A004
Page 17 of 47
Copyright © by Embraer S.A. All rights reserved - See title page for details.

### Page 20

(5) Enter the accomplishment of PART V of this service bulletin in the applicable documents.
(6) EMBRAER requests that the results found during these inspections be informed to your local
EMBRAER representatives or via e-mail to "contact.center@embraer.com".
(7) Fill out the "Service Bulletin Implementation and Evaluation" form and click on "Submit by Email"
button. To find the form, log in to the FlyEmbraer portal (http://www.flyembraer.com) and go to:
"Technical Publication > Technical Data > Service Bulletin > Front Matter > SB505 - SERVICE
BULLETIN IMPLEMENTATION AND EVALUATION FORM".
G. PART VI - RUDDER MASS BALANCE AND ATTACHMENT PARTS REPLACEMENT
(1) Remove the static discharge from the rudder surface.
(2) Remove the rudder surface from the aircraft. Refer to AMM TASK 27-21-01-000-801-A/400  -
Rudder Surface - Removal
(3) To get access to the work area, remove the rudder tip rib. Refer to Figure 12.
(4) Replace or install the same Rudder Mass-Balance, apply EPOXY PRIMER, GREEN BAC452,
TYPE II (MEP 10-059) 17084GEP-LVOC/17085CEH-LVOC and PAINT,POLYURETHANE HS,
WHITE- FS595-17875(B) - 715293 (MEP 10-069) ECL-G-46/K4G1 according to criteria of the
PART V, and according to Figure 13.
(5) Clean the workarea according to SRM PART 2 51-22-01  - SURFACE FINISHING AND
PROTECTION - CLEANING.
(6) Install the static dischargers to the rudder surface.
(7) Apply a coat of paint to the rivets head in accordance with SRM PART 2 51-22-05  - SURFACE
FINISHING AND PROTECTION - TOPCOAT APPLICATION.
(8) Do the rudder static balancing according to AMM TASK 51-60-03-720-801-A/500 - Rudder Static
Balancing.
(9) Install the rudder surface to the aircraft, according to AMM TASK 27-21-01-400-801-A/400  -
Rudder Surface - Installation.
NOTE: Make sure that the tests described in the “Job Close-Up” topic of the installation task is
performed according to the instructions contained in the "Aircraft Maintenance Manual".
(10) Put the aircraft back to its normal condition. Refer to AMM TASK 20-00-00-910-801-A/200  -
Aircraft Maintenance Safety Procedures.
(11) Enter the accomplishment of PART VI of this service bulletin in the applicable documents.
(12) EMBRAER requests that the results found during these inspections be informed to your local
EMBRAER representatives or via e-mail to "contact.center@embraer.com".
(13) Fill out the "Service Bulletin Implementation and Evaluation" form and click on "Submit by Email"
button. To find the form, log in to the FlyEmbraer portal (http://www.flyembraer.com) and go to:
"Technical Publication > Technical Data > Service Bulletin > Front Matter > SB505 - SERVICE
BULLETIN IMPLEMENTATION AND EVALUATION FORM".
H. PART VII - ADDITIONAL ACTION
Aircraft that have complied with the previous issue of this bulletin need to comply with additional action,
as follows:
– PART I - ELEVATOR MASS BALANCE AND ATTACHMENT PARTS INSPECTION.
ALERT
SERVICE BULLETIN
SB505-55-A004
Page 18 of 47 ALERT
Date:  Oct 30, 2019
Revision No.:  03 - Nov 13, 2019
Copyright © by Embraer S.A. All rights reserved - See title page for details.

### Page 21

– PART III - AILERON MASS BALANCE AND ATTACHMENT PARTS INSPECTION.
– PART V - RUDDER MASS BALANCE AND ATTACHMENT PARTS INSPECTION.
ALERT
SERVICE BULLETIN
Date:  Oct 30, 2019
Revision No.:  03 - Nov 13, 2019 ALERT
SB505-55-A004
Page 19 of 47
Copyright © by Embraer S.A. All rights reserved - See title page for details.

### Page 22

FIGURE 1 - ELEVATOR MASS BALANCE AND ATTACHMENT PARTS INSPECTION
(Sheet 1 of 1)
EM500ENSB550068B.IDR
B
C
MASS-BALANCE WEIGHT
AND FASTENERS
(INSPECT)
A
   ZONES
  347/348
MASS-BALANCE WEIGHT
AND FASTENERS
(INSPECT)
INSPECT THE MASS-BALANCE WEIGHT AND ATTACHMENT PARTS FOR INTEGRITY AND CORROSION  01
01
01
B
A
TYPICAL
C
ALERT
SERVICE BULLETIN
SB505-55-A004
Page 20 of 47 ALERT
Date:  Oct 30, 2019
Revision No.:  03 - Nov 13, 2019
Copyright © by Embraer S.A. All rights reserved - See title page for details.

### Page 23

FIGURE 2 - ELEVATOR MASS-BALANCE REGION - INSPECTION BY VIDEOSCOPE
METHOD
(Sheet 1 of 2)
EM500ENSB550090B.IDR
A
TYPICAL
ZONES
347
348
A
B
MASS BALANCE 
WEIGHT
(INSPECT)
01
INSPECT THE MASS-BALANCE WEIGHT AND ATTACHMENT PARTS FOR INTEGRITY AND CORROSION.  01
B
C
MASS BALANCE 
WEIGHT
(INSPECT)
01
NOTE:
TO MAKE VIDEOSCOPE INSPECTION OF THE MASS EASIER, IT IS RECOMMENDED TO USE THE SIDE VIEW TIP. 
MANUFACTURED
ACCESS HOLE
WITH DIAMETER EQUAL
TO 6.3 mm (0.25 in.)
VIDEOSCOPE
36 mm (1.42 in.)
ALERT
SERVICE BULLETIN
Date:  Oct 30, 2019
Revision No.:  03 - Nov 13, 2019 ALERT
SB505-55-A004
Page 21 of 47
Copyright © by Embraer S.A. All rights reserved - See title page for details.

### Page 24

FIGURE 2 - ELEVATOR MASS-BALANCE REGION - INSPECTION BY VIDEOSCOPE
METHOD
(Sheet 2 of 2)
EM500ENSB550079B.IDR
C
INSPECT THE FASTENERS FOR INTEGRITY AND CORROSION.  01
ACCESS HOLE
VIDEOSCOPE
01
NOTE:
TO MAKE VIDEOSCOPE INSPECTION OF THE FASTENERS EASIER, IT IS RECOMMENDED TO USE THE SIDE VIEW TIP. 
ALERT
SERVICE BULLETIN
SB505-55-A004
Page 22 of 47 ALERT
Date:  Oct 30, 2019
Revision No.:  03 - Nov 13, 2019
Copyright © by Embraer S.A. All rights reserved - See title page for details.

### Page 25

FIGURE 3 - ELEVATOR MASS BALANCE AND ATTACHMENT PARTS REPLACEMENT
(Sheet 1 of 2)
1. Remove the mass-balance according to AMM TASK 51-60-02-720-801-A/500  - Elevator Static
Balancing.
2. Remove the bolts PN NAS1102-3-24 from elevator mass balance PN PE915109-L42. See Det. C.
3. Remove bolts PN NAS6303-3 and washers PN NAS1801-3-9 from elevator mass balance supports.
See Det. C.
4. Do a wet installation of the bolts PN NAS1802-3-9P and washers PN NAS1149C0316R of the elevator
mass balance supports using the SEALANT, POLYSULFIDE, INTERFAYING, CLASS C-12, GRADE B
(MEP09-084) NAFTOSEAL MC 780 C-12 as shown in the Det. C. Refer to SRM PART 2 51-21-05  -
FASTENER SEALING.
5. Do a wet installation of the bolts PN NAS1102E3-22 to elevator mass balance PN PE915109-L42
using the SEALANT, POLYSULFIDE, INTERFAYING, CLASS C-12, GRADE B
(MEP09-084) NAFTOSEAL MC 780 C-12 as shown in the Det. C. Refer to SRM PART 2 51-21-05  -
FASTENER SEALING.
6. Apply the final torque to bolts PN NAS1802-3-9P, and NAS1102E3-22 according to the procedures
below:
1) With a torque wrench, turn the bolt and measure the locking torque.
2) Make sure that the locking torque is between 0.22 and 2.04 N.m (2.0 - 18.0 lb.in).
3) Add the measured locking torque to the torque of 1.4 to 1.7 N.m (12 - 15 lb.in) to get the final
torque.
4) Apply inspection torque seal Pink Torque Seal (MEP 09-068) F-925 to the bolts head.
7. Install the mass-balance according to AMM TASK 51-60-02-720-801-A/500 - Elevator Static Balancing.
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### Page 26

FIGURE 3 - ELEVATOR MASS BALANCE AND ATTACHMENT PARTS REPLACEMENT
(Sheet 2 of 2)
EM500ENSB550091B.IDR
B
C
MASS-BALANCE WEIGHT
PN PE915109-L33 
(REPLACE WITH THE SAME PN)
A
   ZONES
  347/348
THREADED BAR
PN 505-11215-003
(02 POSITIONS)
(REPLACE WITH THE SAME PN)
FASTENERS
PN NAS1801-3-9
(8 POSITIONS)
(REMOVE AND DISCARD)
PN NAS1802-3-9P
(INSTALL)
MASS-BALANCE WEIGHT
PN PE915109-L42 
(REPLACE WITH THE SAME PN)
FASTENERS
PN NAS1102-3-24
(2 POSITIONS)
(REMOVE AND DISCARD)
PN NAS1102E3-22
(INSTALL)
SUPPORT
(REF.)
B
A
TYPICAL
C
TORQUE ACCORDING TO STEP 0601
NAFTOSEAL MC 780C-12 (MEP 09-084)02
01
02
01
02
APPLY PRIMER (MEP 10-059) AND PAINT POLYURETHANE HS,  WHITE (MEP 10-069)03
03
03
71
71
43 6
52 6
NUT
PN MS21043-3
(REPLACE WITH
THE SAME PN)
WASHER
PN NAS1149C0332R
(REPLACE WITH
THE SAME PN)
NUT
PN NAS506-3C
REPLACE WITH
THE SAME PN)
REFER TO AIPC04
04
04
04
ADJUST MASS
PN 505-11216-001
(CLEAN AND REINTALL)
04
WASHER
PN NAS1149C0432R
(REPLACE WITH THE SAME PN)
04
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### Page 27

FIGURE 4 - REMOVAL OF THE ELEVATOR LEADING EDGE
(Sheet 1 of 2)
1. Remove the rivets PN UAB130-EU05-03AC (96 positions) from the elevator leading edge as shown in
Det. B and Det. C. Refer to SRM PART 2 51-42-02 - CHERRYMAX BLIND RIVETS - FLUSH HEAD.
2. Carefully remove the elevator leading edge from the elevator surface.
3. Clean the area as given in SRM PART 2 51-22-01  - SURFACE FINISHING AND PROTECTION -
CLEANING.
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### Page 28

FIGURE 4 - REMOVAL OF THE ELEVATOR LEADING EDGE
(Sheet 2 of 2)
A
ZONES
347
348
B
A
TYPICAL
B
C
C
RIVET
PN UAB130−EU05−03AC
(48 POSITIONS)
(REMOVE)
RIVET
PN UAB130−EU05−03AC
(48 POSITIONS)
(REMOVE)
ELEVATOR
SURFACE
ELEVATOR
LEADING EDGE
PRE−MOD
PRE−MOD
1
1
2 3
EM500ENSB550004A.DGN
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### Page 29

FIGURE 5 - REPLACEMENT OF THE BOLTS AND MASS-BALANCE OF THE ELEVATOR
(Sheet 1 of 4)
1. Remove the bolts PN NAS6303-15D and washers PN NAS1149C0316R from elevator mass balance
PN 505-11062-001. See Det. C.
2. Do a wet installation of the bolts PN NAS1802-3-20P and washers PN NAS1149C0316R of the
elevator mass balance. To do this, use the SEALANT, POLYSULFIDE, INTERFAYING, CLASS C-12,
GRADE B (MEP09-084) NAFTOSEAL MC 780 C-12 as shown in the Det. C. Refer to SRM PART 2
51-21-05 - FASTENER SEALING.
3. Remove the bolts PN NAS6303-10 and washers PN NAS1149C0316R from elevator mass balance PN
PE915109-L41. See Det. D.
4. Do a wet installation of the bolts PN NAS1802-3-20P and washers PN NAS1149C0316R of the
elevator mass balance using the SEALANT, POLYSULFIDE, INTERFAYING, CLASS C-12, GRADE B
(MEP09-084) NAFTOSEAL MC 780 C-12 as shown in the Det. D. Refer to SRM PART 2 51-21-05  -
FASTENER SEALING.
5. Remove the bolts PNNAS6303-11 and washers PN AS1149C0316R from elevator mass balance PN
PE915109-L40. See Det. E.
6. Do a wet installation of the bolts PN NAS1802-3-20P and washers PN NAS1149C0316R to elevator
mass balance using the SEALANT, POLYSULFIDE, INTERFAYING, CLASS C-12, GRADE B
(MEP09-084) NAFTOSEAL MC 780 C-12 as shown in the Det. E. Refer to SRM PART 2 51-21-05  -
FASTENER SEALING.
7. Apply the final torque to bolts PN NAS1802-3-20P, according to the procedures below:
1) With a torque wrench, turn the bolt and measure the locking torque.
2) Make sure that the locking torque is between 0.22 and 2,04 N.m (2.0 - 18.0 lb.in).
3) Add the measured locking torque to the torque of 1.4 to 1.7 N.m (12 - 15 lb.in) to get the final
torque.
4) Apply inspection torque seal Pink Torque Seal (MEP 09-068) F-925 to the bolts head.
8. Install the elevator leading edge as shown in Figure 6.
CAUTION: BE CAREFUL WHEN YOU USE THE POLYETHYLENE SPATULA TO REMOVE THE
IDENTIFICATION PLACARD. TOO MUCH FORCE CAN CAUSE DAMAGE TO THE CONTROL
SURFACES.
WARNING: ALWAYS OBEY THE MANUFACTURER'S HEALTH AND SAFETY PRECAUTIONS WHEN
YOU USE EPOXY ADHESIVE. DO NOT BREATHE THE EPOXY ADHESIVE FUMES AND
DO NOT LET IT GET TO YOUR SKIN, IN YOUR EYES OR MOUTH. PUT ON APPROVED
PROTECTIVE CLOTHING AND GOGGLES. IF YOU DO NOT OBEY THESE
PRECAUTIONS, INJURY CAN OCCUR.
ALERT
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### Page 30

FIGURE 5 - REPLACEMENT OF THE BOLTS AND MASS-BALANCE OF THE ELEVATOR
(Sheet 2 of 4)
EM500ENSB550086A.IDR
ELEVATOR
SURFACE
B
E
D
C
A
TYPICAL
  ZONES
  347
  348
A
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### Page 31

FIGURE 5 - REPLACEMENT OF THE BOLTS AND MASS-BALANCE OF THE ELEVATOR
(Sheet 3 of 4)
EM500ENSB550087C.IDR
01 02
WASHER
PN NAS1149C0316R
(3 POSITIONS)
(REINSTALL)
02
01 TORQUE ACCORDING TO STEP 07
NAFTOSEAL MC 780C-12 (MEP 09-084)
BOLT
PN NAS1801-3-20
(3 POSITIONS)
(REMOVE AND DISCARD)
PN NAS1802-3-20P
(3 POSITIONS)
(INSTALL)
D
TYPICAL
C
1 2
1 2 7
3 4 7
3 4
02
02
MASS BALANCE
PN 505-11062-001
(REINSTALL)
MASS BALANCE
PN PE915109-L41
(REPLACE)
BOLT
PN NAS1801-3-20
(3 POSITIONS)
(REMOVE AND DISCARD)
PN NAS1802-3-20P
(3 POSITIONS)
(INSTALL)
WASHER
PN NAS1149C0316R
(3 POSITIONS)
(REINSTALL)
03 APPLY PRIMER (MEP 10-059) AND PAINT POLYURETHANE HS,  WHITE (MEP 10-069)
03
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### Page 32

FIGURE 5 - REPLACEMENT OF THE BOLTS AND MASS-BALANCE OF THE ELEVATOR
(Sheet 4 of 4)
EM500ENSB550088C.IDR
BOLT
PN NAS1801-3-20
(3 POSITIONS)
(REMOVE AND DISCARD)
PN NAS1802-3-20P
(INSTALL)
WASHER
PN NAS1149C0316R
(3 POSITIONS)
(REINSTALL)
01 02 E
02
01 TORQUE ACCORDING TO STEP 07
NAFTOSEAL MC 780C-12 (MEP 09-084)
5 6
5 6 7
02
MASS BALANCE
PN PE915109-L40
(REPLACE)
03 APPLY PRIMER (MEP 10-059) AND PAINT POLYURETHANE HS,  WHITE (MEP 10-069)
03
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### Page 33

FIGURE 6 - INSTALLATION OF THE ELEVATOR LEADING EDGE
(Sheet 1 of 2)
1. Remove the remaining sealant from the elevator leading edge. Refer to SRM PART 2 51-21-07  -
SEALING REMOVAL.
2. Put the elevator leading edge in its position as shown in Det. C and Det. D.
3. Install rivets PN UAB130-EU05-03AC (96 positions) to the elevator leading edge as shown in Det. C
and Det. D. Refer to SRM PART 2 51-42-02 - CHERRYMAX BLIND RIVETS - FLUSH HEAD.
NOTE: If necessary, use oversize rivets PN UAB130-EU06-03AC.
Install the rivets from the center to the ends of the elevator leading edge.
4. Clean the area as given in SRM PART 2 51-22-01  - SURFACE FINISHING AND PROTECTION -
CLEANING.
5. Apply the sealant Fast-Curing Polythioether Sealant (MEP 09-083) PR2050B1/2 on the contour of the
elevator leading edge according to SRM PART 2 51-21-03 - AERODYNAMIC SEALING. See Det. B.
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### Page 34

FIGURE 6 - INSTALLATION OF THE ELEVATOR LEADING EDGE
(Sheet 2 of 2)
A
ZONES
347
348
A
TYPICAL
ELEVATOR
SURFACE
ELEVATOR
LEADING EDGE
01
01
B
B
C
C
D
D
POST−MOD
POST−MOD
RIVET
PN UAB130−EU05−03AC
(48 POSITIONS)
(INSTALL)
RIVET
PN UAB130−EU05−03AC
(48 POSITIONS)
(INSTALL)
01 SEALANT PR2050 B 1/2 
EM500ENSB550007A.DGN
B
4
3
3
1 2 4
5
ELEVATOR
LEADING EDGE
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### Page 35

FIGURE 7 - AILERON MASS-BALANCE REGION - INSPECTION BY VIDEOSCOPE
METHOD
(Sheet 1 of 2)
EM500ENSB550080A.IDR
A
  ZONE
  572
A
AILERON (REF.)
HORN
(REF.)
B
INSPECT THE MASS-BALANCE WEIGHT AND ATTACHMENT PARTS FOR INTEGRITY AND CORROSION.  01
B
ACCESS HOLE
VIDEOSCOPE
MASS BALANCE 
WEIGHT
(INSPECT)
01
C
TO MAKE VIDEOSCOPE INSPECTION OF THE MASS EASIER, IT IS RECOMMENDED TO USE THE SIDE VIEW TIP.
NOTE:
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### Page 36

FIGURE 7 - AILERON MASS-BALANCE REGION - INSPECTION BY VIDEOSCOPE
METHOD
(Sheet 2 of 2)
EM500ENSB550081A.IDR
C
ACCESS HOLE
VIDEOSCOPE
MASS BALANCE 
WEIGHT
(INSPECT)
01
INSPECT THE MASS-BALANCE WEIGHT AND ATTACHMENT PARTS FOR INTEGRITY AND CORROSION.  01
TO MAKE VIDEOSCOPE INSPECTION OF THE MASS EASIER, IT IS RECOMMENDED TO USE THE SIDE VIEW TIP.
NOTE:
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### Page 37

FIGURE 8 - AILERON MASS BALANCE AND ATTACHMENT PARTS REPLACEMENT
(Sheet 1 of 1)
EM500ENSB550073D.IDR
A
  ZONE
  572
A
B
AILERON (REF.)
HORN
(REF.)
HORN COVER
SCREW
PN NAS1580C3R6P
(3 POSITIONS)
(REPLACE WITH 
THE SAME PN)
HORN (REF.)
B
C
C
FIXED MASS
BALANCE WEIGHT
PN PE915109L31
(REPLACE WITH
THE SAME PN)
WASHER
PN NAS1149C0332R
(3 POSITIONS)
(REPLACE WITH 
SAME PN) NUTPN MS21043-3
(3 POSITIONS)
(REPLACE WITH 
SAME PN)
ADJUSTABLE MASS
BALANCE WEIGHT
PN 505-14658-001
PN 505-14628-001
PN 505-14659-001
(CLEAN AND REINSTALL)
SCREW
PN NAS1102E3-52
(3 POSITIONS)
(REPLACE WITH THE SAME PN)
APPLY PRIMER (MEP 10-059) AND PAINT POLYURETHANE HS,  WHITE (MEP 10-069) 01
01
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### Page 38

FIGURE 9 - RUDDER MASS BALANCE AND ATTACHMENT PARTS INSPECTION
(Sheet 1 of 1)
EM500ENSB550074A.IDR
A
  ZONE
  336
A
RUDDER
TRIM TAB
SURFACE (REF.)
RUDDER
SURFACE (REF.)
B
RUDDER
SURFACE (REF.)
RUDDER
TRIM TAB
SURFACE (REF.)
B
MASS BALANCE 
WEIGHT
(INSPECT)
INSPECT THE MASS-BALANCE WEIGHT AND ATTACHMENT PARTS FOR INTEGRITY AND CORROSION  01
01
ATTACHMENT PARTS
(INSPECT)
01
ALERT
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### Page 39

FIGURE 10 - RUDDER MASS-BALANCE REGION - INSPECTION BY VIDEOSCOPE
METHOD
(Sheet 1 of 2)
EM500ENSB550076A.IDR
ZONE
336
A
B
A RUDDER
TRIM TAB
SURFACE (REF.)
RUDDER
SURFACE (REF.)
B
ACCESS HOLE
C C
ACCESS HOLE
VIDEOSCOPE
COVER
PN 505-10410-402
(REMOVE AND RETAIN)
(REINSTALL)
COVER
PN 505-10410-401
(REMOVE AND RETAIN)
(REINSTALL)
COVER
PN 505-10408-401
(REMOVE AND RETAIN)
(REINSTALL)
COVER
PN 505-10408-402
(REMOVE AND RETAIN)
(REINSTALL)
BOLT
PN NAS1580C3R3P
(6 POSITIONS)
(REMOVE AND RETAIN)
(REINSTALL)
ALERT
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### Page 40

FIGURE 10 - RUDDER MASS-BALANCE REGION - INSPECTION BY VIDEOSCOPE
METHOD
(Sheet 2 of 2)
EM500ENSB550077B.IDRINSPECT THE MASS-BALANCE WEIGHT AND ATTACHMENT PARTS FOR INTEGRITY AND CORROSION.  01
C
MASS BALANCE 
WEIGHT
(INSPECT)
01
ACCESS HOLE
ACCESS HOLE
D
MASS BALANCE 
WEIGHT
(INSPECT)
01
D
ALERT
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### Page 41

FIGURE 11 - RUDDER MASS BALANCE AND ATTACHMENT PARTS REPLACEMENT
(Sheet 1 of 1)
EM500ENSB550075D.IDR
  ZONE
  336
A
A
HINGE PIN
SUPPORT
(REF.)
MASS TUNGSTEN
PN PE5109L27
(REPLACE WITH THE SAME PN) 
RUDDER SURFACE
PIN ADJUSTMENT
PN 505-10439-001
(REPLACE WITH THE SAME PN) 
NUT
PN MS21043-5
(REPLACE WITH 
THE SAME PN) 
WASHER
PN NAS1149C0532R
(REPLACE WITH 
THE SAME PN) 
APPLY PRIMER (MEP 10-059) AND PAINT POLYURETHANE HS,  WHITE (MEP 10-069) 01
01
ADJUST MASS
PN 505-10495-001
(CLEAN AND REINSTALL)
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### Page 42

FIGURE 12 - REMOVAL OF THE RUDDER TIP RIB
(Sheet 1 of 3)
1. Carefully remove and discard the rivets PN UABP-EU05-02AC (15 positions) and PN UAB130-
EU05-02AC (28 positions) according to SRM PART 2 51-41-01  - SOLID RIVETS - PROTRUDING
HEAD. Refer to Det. C and Det. D.
2. Carefully remove the rudder tip rib from the rudder.
3. Clean the area as given in SRM PART 2 51-22-01  - SURFACE FINISHING AND PROTECTION -
CLEANING.
ALERT
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### Page 43

FIGURE 12 - REMOVAL OF THE RUDDER TIP RIB
(Sheet 2 of 3)
EM500ENSB270134A.DGN
A
D
C
B
B
RIVETS
PN UABP−EU05−02AC
(REMOVE AND DISCARD)
(7 POSITIONS)
RUDDER TIP RIB
(REMOVE AND MAINTAIN)
1 3
2 3
A
ZONE
336
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### Page 44

FIGURE 12 - REMOVAL OF THE RUDDER TIP RIB
(Sheet 3 of 3)
RUDDER
SURFACE
(REF.)
RUDDER
SURFACE
(REF.)
C
D
EM500ENSB270135A.DGN
1
1
RIVETS
PN UABP−EU05−02AC
(REMOVE AND DISCARD)
(4 POSITIONS)
RIVETS
PN UAB130−EU05−02AC
(REMOVE AND DISCARD)
(14 POSITIONS)
1
RIVETS
PN UAB130−EU05−02AC
(REMOVE AND DISCARD)
(14 POSITIONS)
1
RIVETS
PN UABP−EU05−02AC
(REMOVE AND DISCARD)
(4 POSITIONS)
ALERT
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### Page 45

FIGURE 13 - REPLACEMENT OF THE BOLTS AND MASS-BALANCE OF THE RUDDER
(Sheet 1 of 5)
1. Remove and discard the bolts PN NAS6304-14 (3 positions), washers PN NAS1149C0463R (3
positions), nut barrels PN NAS577B4A (3 positions) and nut retainers PN NAS578-4B (3 positions)
from the mass balance. Refer to Det. F-F.
2. Apply SEALANT, POLYSULFIDE, INTERFAYING, CLASS C-12, GRADE B
(MEP09-084) NAFTOSEAL MC 780 C-12, to do wet installation of the bolts ( SRM PART 2 51-21-05  -
FASTENER SEALING). Refer to Det. F-F.
3. Install the bolts PN NAS1802-4-20 (3 positions), washers PN NAS1149C0432R (3 positions), nut
barrels PN NAS577B4A (3 positions) and nut retainers PN NAS578-4B (3 positions) to the mass
balance. Refer to Det. F-F.
4. Apply the final torque to bolts PN NAS1802-4-20 (3 positions) according to the procedures below:
(a) With a torque wrench, turn the bolt and measure the locking torque.
(b) Make sure that the locking torque is between 0.4 to 3.4 N.m (3.5 - 30.0 lb.in). If not, replace the
nut barrel PN NAS577B4A.
(c) Add the measured locking torque to the torque of 4.0 N.m (35 lb.in) to get the final torque.
WARNING: ALWAYS OBEY THE MANUFACTURER'S HEALTH AND SAFETY PRECAUTIONS WHEN
YOU USE EPOXY ADHESIVE. DO NOT BREATHE THE EPOXY ADHESIVE FUMES AND
DO NOT LET IT GET TO YOUR SKIN, IN YOUR EYES OR MOUTH. PUT ON APPROVED
PROTECTIVE CLOTHING AND GOGGLES. IF YOU DO NOT OBEY THESE
PRECAUTIONS, INJURY CAN OCCUR.
5. Apply Epoxy Adhesive (MEP09-066) EA9394 around the rudder tip rib, according to Det. G-G.
6. Position the rudder tip rib on the rudder surface. Refer to Det. H.
7. Install rivets PN UABP-EU05-02AC (7 positions) to the top of the rudder tip rib ( SRM PART 2 51-42-02
- CHERRYMAX BLIND RIVETS - FLUSH HEAD). Refer to Det. H.
NOTE: If necessary, use oversize rivets PN UABP-EU06-02AC.
8. Install rivets PN UAB130-EU05-02AC (28 positions) ( SRM PART 2 51-42-02  - CHERRYMAX BLIND
RIVETS - FLUSH HEAD). Refer to Det. J and Det. K.
NOTE: If necessary, use oversize rivets PN UAB130-EU06-02AC.
9. Install rivets UABP-EU05-02AC (8 positions) (SRM PART 2 51-42-02 - CHERRYMAX BLIND RIVETS -
FLUSH HEAD). Refer to Det. J and Det. K.
NOTE: If necessary, use oversize rivets PN UABP-EU06-02AC.
10. Apply aerodynamic Fast-Curing Polythioether Sealant (MEP 09-083) PR2050B1/2 to the contour of the
rudder rib tip, on the rudder surface (SRM PART 2 51-21-03 - AERODYNAMIC SEALING). See Det. G
- G.
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### Page 46

FIGURE 13 - REPLACEMENT OF THE BOLTS AND MASS-BALANCE OF THE RUDDER
(Sheet 2 of 5)
A
ZONE
336
A
E
D
C
B
B
EM500ENSB550003A.DGN
ALERT
SERVICE BULLETIN
SB505-55-A004
Page 44 of 47 ALERT
Date:  Oct 30, 2019
Revision No.:  03 - Nov 13, 2019
Copyright © by Embraer S.A. All rights reserved - See title page for details.

### Page 47

FIGURE 13 - REPLACEMENT OF THE BOLTS AND MASS-BALANCE OF THE RUDDER
(Sheet 3 of 5)
F-F
01
01
01
1
1
1
1 2
3 4
EM500ENSB270136D.IDR
RUDDER TIP
RIB (REF.)
BOLT
(3 POSITIONS)
PN NAS6304-14
(REMOVE AND DISCARD)
PN NAS1802-4-20
(INSTALL)
BALANCE
MASS
PN PE915109-L26
(REPLACE WITH
THE SAME PN)
NAFTOSEAL MC 780C-12 (MEP 09-084)
02
02
NUT BARREL
(3 POSITIONS)
(REPLACE)
PN NAS577B4A
NUT RETAINER
(3 POSITIONS)
(REPLACE)
PN NAS578-4B
TORQUE ACCORDING TO STEP 4
WASHER
(3 POSITIONS)
PN NAS1149C0463R
(REMOVE AND DISCARD)
PN NAS1149C0432R
(INSTALL)
E
H
J K
F
F
G G
03 APPLY PRIMER (MEP 10-059) AND PAINT POLYURETHANE HS,  WHITE (MEP 10-069)
03
ALERT
SERVICE BULLETIN
Date:  Oct 30, 2019
Revision No.:  03 - Nov 13, 2019 ALERT
SB505-55-A004
Page 45 of 47
Copyright © by Embraer S.A. All rights reserved - See title page for details.

### Page 48

FIGURE 13 - REPLACEMENT OF THE BOLTS AND MASS-BALANCE OF THE RUDDER
(Sheet 4 of 5)
G−G
H
03
04
03
04
03
04
EM500ENSB270137A.DGN
11
6 11
55
RUDDER TIP
RIB
RIVETS
PN UABP−EU05−02AC
(INSTALL)
(7 POSITIONS)
SEALANT PR2050B1/2
7
EPOXY ADHESIVE − TYPE I − CLASS 3
ALERT
SERVICE BULLETIN
SB505-55-A004
Page 46 of 47 ALERT
Date:  Oct 30, 2019
Revision No.:  03 - Nov 13, 2019
Copyright © by Embraer S.A. All rights reserved - See title page for details.

### Page 49

FIGURE 13 - REPLACEMENT OF THE BOLTS AND MASS-BALANCE OF THE RUDDER
(Sheet 5 of 5)
RUDDER
SURFACE
(REF.)
RUDDER
SURFACE
(REF.)
J
K
RIVETS
PN UABP−EU05−02AC
(INSTALL)
(4 POSITIONS)
RIVETS
PN UAB130−EU05−02AC
(INSTALL)
(14 POSITIONS)
RIVETS
PN UAB130−EU05−02AC
(INSTALL)
(14 POSITIONS)
RIVETS
PN UABP−EU05−02AC
(INSTALL)
(4 POSITIONS)
9
8
8
9
EM500ENSB270138C.DGN
ALERT
SERVICE BULLETIN
Date:  Oct 30, 2019
Revision No.:  03 - Nov 13, 2019 ALERT
SB505-55-A004
Page 47 of 47
Copyright © by Embraer S.A. All rights reserved - See title page for details.

### Page 50

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