### 1. DESCRIPTION This sheet transmits Revision 01 to Service Bulletin 170-52-0055. This is a complete reissue of the Bulletin. 2. ADDITIONAL ACTION Aircraft that have complied with the previous issue of this bulletin need an additional action, according to PART II. After the accomplishment of PART II, if applicable, the accomplishment of PART III may be necessary. 3. RECORD OF REVISION Basic issue: 10/Feb/2011. Revision 01: 01/Aug/2011. 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 TITLE / 01 Updated information. 1. PLANNING INFORMATION 1.A. SB EFFECTIVITY / 01 and 02 Changed SB effectivity and divided SB in 3 GROUPS. 1.C. REASON / 02 Added reason of Revision 01. 1.D. DESCRIPTION / 02 and 03 Updated information and divided bulletin in 3 PARTS. 1.E. COMPLIANCE / 03 and 04 Updated information and divided bulletin in 3 PARTS. 1.G. ESTIMATED MANPOWER / 04 and 05 Updated information and divided bulletin in 3 PARTS 1.H. WEIGHT AND BALANCE / 05 Updated information and divided bulletin in 3 PARTS 2. MATERIAL INFORMATION 2.A. MATERIAL - PRICE AND AVAILABILITY / 07 Included additional kit.2.C. MATERIAL NECESSARY FOR EACH AIRCRAFT / 08 and 09 Included additional kit. 2.E. REIDENTIFIED PARTS / 11, 13 thru 15 Updated part number information. 

# TRANSMITTAL LETTER

SB No.: 170-52-0055 PAGE: 1 of 2 Copyright © 2011 by Embraer S.A. All rights reserved.TOPIC/PAGE DESCRIPTION OF REVISION 3. ACCOMPLISHMENT INSTRUCTIONS / 16 and 17 Updated modification procedures and divided in 3 PARTS. Figure 1 / 19, 22 thru 25 Included additional procedure and update illustration. Figure 2 / 26 thru 28 Included additional procedure. Figure 3 / 29 thru 32 Included additional procedure. 

# TRANSMITTAL LETTER

SB No.: 170-52-0055 PAGE: 2 Copyright © 2011 by Embraer S.A. All rights reserved.

### DOORS - COCKPIT DOOR PASSIVE LOCK AND HINGES REPLACEMENT This bulletin supersedes SB170-52-0052.
1. PLANNING INFORMATION A. SB EFFECTIVITY Aircraft affected: (1) GROUP 1MODEL SN Embraer 170( ) and 175( ) 17000001 thru 17000321, which have not been modified according to the previous issue of this bulletin. (2) GROUP 2 MODEL SN Embraer 170( ) and 175( ) 17000001 thru 17000321, which have already been modified according to the previous issue of this bulletin. (3) GROUP 3 MODEL SN Embraer 170( ) and 175( ) 17000322 thru 17000325. Affected component: None. In-production effectivity: 

# SERVICE BULLETIN

DATE: 10/Feb/2011 REVISION No.:01 - 01/Aug/2011 

### SB No.: 170-52-0055 PAGE: 1 of 32 Copyright © 2011 by Embraer S.A. All rights reserved.

### Embraer 170( ) and 175( ) model aircraft SN 17000326 and on have an equivalent modification factory-incorporated. B. CONCURRENT REQUIREMENTS The accomplishment of SB170-52-0054 original issue or a subsequent approved revision is required in conjunction with the accomplishment of this Service Bulletin. C. REASON (1) HISTORY The screws that attach the passive lock striker may become loose due to aircraft natural vibration. This can result in the loss of the passive lock striker and the cockpit door falling off its door hinges in the cockpit, as a consequence. (2) OBJECTIVE To replace the existing passive lock striker, quick-release pin and also to inspect and replace the upper and lower hinges of the cockpit door, if necessary. (3) EXPECTED BENEFITS To improve the passive lock striker attachment, in order to avoid the striker from becoming loose. (4) REVISION HISTORY REVISION 01: This revision has been issued to improve the Service Bulletin solution and included PART II and PART III as additional action. D. DESCRIPTION This Bulletin is divided into 3 PARTS, as follows:
PART I REPLACEMENT OF COCKPIT DOOR PASSIVE LOCK STRIKER Applicable to: GROUP 1. 

# SERVICE BULLETIN

SB No.: 170-52-0055 PAGE: 2 DATE: 10/Feb/2011 REVISION No.: 01 - 01/Aug/2011 Copyright © 2011 by Embraer S.A. All rights reserved.

### PART I of this bulletin provides instructions to replace the existing passive lock striker and quick-release pin of the cockpit door. To do this, it is necessary to gain access to the cockpit area.
PART II INSPECTION OF COCKPIT DOOR HINGES Applicable to: GROUP 1, GROUP 2 AND GROUP 3. 

### PART II of this bulletin provides instructions to inspect the upper and lower hinges located in the cockpit door. To do this, it is necessary to gain access to the cockpit area.
PART III REPLACEMENT OF COCKPIT DOOR HINGES Applicable to: GROUP 1, GROUP 2 AND GROUP 3. 

### PART III of this bulletin provides instructions to replace the existing upper and lower hinges located in the cockpit door and cockpit door jambs. To do this, it is necessary to gain access to the cockpit area. NOTE: The modification presented in this bulletin does not affect the Fatigue Critical Structure (FCS). E. COMPLIANCE (1) APPLICABLE TO PART I Embraer recommends that PART I of this bulletin be accomplished within the next 3000 Flight Hour(s) after the issuance of revision 01 of this bulletin revision. (2) APPLICABLE TO PART II Embraer recommends that PART II of this bulletin be accomplished within the next 3000 Flight Hour(s) after the issuance of revision 01 of this bulletin revision. (3) APPLICABLE TO PART III Embraer recommends that PART III of this bulletin be accomplished after the 

# SERVICE BULLETIN

DATE: 10/Feb/2011 REVISION No.:01 - 01/Aug/2011 

### SB No.: 170-52-0055 PAGE: 3 Copyright © 2011 by Embraer S.A. All rights reserved.

### accomplishment of PART II, and within the next 3000 Flight Hour(s) after the issuance of revision 01 of this bulletin revision. F. APPROVAL The technical aspects of this Service Bulletin are 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 readily available when necessary. This estimate does not include the sealant, paint, or adhesive curing time. (1) APPLICABLE TO PART I – Access opening: 1.0 man-hours. – Inspection: None. – Modification: 1.0 man-hours. – Access closure: 1.0 man-hours. – Test: None. (2) APPLICABLE TO PART II – Access opening: 1.0 man-hours. – Inspection: 0.4 man-hours. – Modification: None. – Access closure: 1.0 man-hours. 

# SERVICE BULLETIN

SB No.: 170-52-0055 PAGE: 4 DATE: 10/Feb/2011 REVISION No.: 01 - 01/Aug/2011 Copyright © 2011 by Embraer S.A. All rights reserved.

### – Test: None. (3) APPLICABLE TO PART III – Access opening: 1.0 man-hours. – Inspection: None. – Modification: 0.4 man-hours. – Access closure: 1.0 man-hours. – Test: None. H. WEIGHT AND BALANCE (1) APPLICABLE TO PART I – Change in basic weight: + 0.179 lb (+ 0.081 kg). – Change in basic moment: + 25.933 lb.in (+ 0.298 kg.m). (2) APPLICABLE TO PART II None. (3) APPLICABLE TO PART III – Change in basic weight: + 0.170 lb (+ 0.077 kg). – Change in basic moment: + 24.623 lb.in (+ 0.283 kg.m). I. SOFTWARE ACCOMPLISHMENT SUMMARY None. 

# SERVICE BULLETIN

DATE: 10/Feb/2011 REVISION No.:01 - 01/Aug/2011 

### SB No.: 170-52-0055 PAGE: 5 Copyright © 2011 by Embraer S.A. All rights reserved.

### J. REFERENCES AMM 170/( ) Aircraft Maintenance Manual PART II - 20-00-00 and 20-10-09 - STANDARD PRACTICES-AIRFRAME. AMM 170/( ) Aircraft Maintenance Manual PART II - 52-51-01 - DOORS. SB170-52-0052 DOORS - COCKPIT DOOR PASSIVE LOCK MODIFICATION. SB170-52-0054 DOORS - COCKPIT DOOR INSPECTION &sol; ADJUSTMENT. K. OTHER PUBLICATIONS AFFECTED AIPC 170/( ) Aircraft Illustrated Parts Catalog - 52-51-01 - DOORS. AMM 170/( ) Aircraft Maintenance Manual PART II - 52-51-01 - DOORS. 

# SERVICE BULLETIN

SB No.: 170-52-0055 PAGE: 6 DATE: 10/Feb/2011 REVISION No.: 01 - 01/Aug/2011 Copyright © 2011 by Embraer S.A. All rights reserved.

### 2. MATERIAL INFORMATION A. MATERIAL - PRICE AND AVAILABILITY (1) MATERIAL AVAILABLE FROM EMBRAER The kit below, required for the accomplishment of this bulletin, will be available from Embraer at no charge to the operator during a period of 36 months after the original release date of this service bulletin. The estimated delivery date will be provided by Embraer upon request. When ordering, specify SB 170-52-0055 and Top Kit PN presented in Table below, as applicable.

REF TOP KIT PN Unit Price (US$) TOP KIT EFFECTIVITY

01 BS1705200550001 

### 834.08 Applicable to PART I 02 BS1705200550102 

### 4,011.13 Applicable to PART III 

### (2) MATERIAL AVAILABLE FROM OTHER VENDORS None. B. INDUSTRY SUPPORT INFORMATION
None. C. MATERIAL NECESSARY FOR EACH AIRCRAFT When applicable, the use of alternative or similar parts in place of the one specified in the kits is allowable, provided that these alternative or similar parts are approved by Embraer as indicated in the related Embraer Technical Publications or through a formal Embraer communication channel. 

# SERVICE BULLETIN

DATE: 10/Feb/2011 REVISION No.:01 - 01/Aug/2011 

### SB No.: 170-52-0055 PAGE: 7 Copyright © 2011 by Embraer S.A. All rights reserved.

### The necessary expendable or consumable parts presented in the AMM Tasks referred to in this bulletin should be procured from the operator’s inventories or ordered as spares. The complementary information, when necessary, is presented as Notes in the respective Table. For ordering information and Top Kit effectivity refer to section 2.A. MATERIAL - PRICE AND AVAILABILITY of this Bulletin. (1) TOP KITS AND KITS Kit Summary: Top Kit Composition (Kit PN / Quantity)
Top Kit PN 171-14451-601 171-14877-601 BS1705200550001 01 - BS1705200550102 - 01 

### (a)

Kit PN 171-14451-601
NEW PN DESCRIPTION OLD PN QTY SUP QTY RQD DISP/ NOTES

171

−08458

−001 Placard 171

−08458

−001 or IAP-00005-01 01 01 3 171-14450-401 Striker 170-96130-001 01 01 3 MS16624-2025 Ring MS16624-2025 01 01 7 NAS1149D0432K Washer - 01 01 2 MS35338-137 Washer - 02 02 2 NAS1149DN816K Washer NAS1149DN816K 02 02 3 - Screw MS24693-C5 or MS24693-C6 - 02 5 - Pin 170-96097-001 - 01 8 

# SERVICE BULLETIN

SB No.: 170-52-0055 PAGE: 8 DATE: 10/Feb/2011 REVISION No.: 01 - 01/Aug/2011 Copyright © 2011 by Embraer S.A. All rights reserved.

### Kit PN 171-14451-601
NEW PN DESCRIPTION OLD PN QTY SUP QTY RQD DISP/ NOTES
- Lanyard cable BLC4BA11SL4A7 - 01 5 - Shim 170-96140-001 - 01 5 

### (b)

Kit PN 171-14877-601
NEW PN DESCRIPTION OLD PN QTY SUP QTY RQD DISP/ NOTES
170-96133-405 Lower Hinge 170-96133-401 01 01 3 / [1] 170-96137-403 Upper hinge 170-96137-401 01 01 3 / [1] 170-96068-403 Upper hinge 170-96068-401 01 01 3 / [2] 170-96076-403 Lower Hinge 170-96076-401 01 01 3 / [2] 171-12687-001 Shim - 01 01 2 / [2] 171-12686-001 Shim - 01 01 2 / [2] PE25041-055-03 Spring pin PE25041-055-03 02 02 7 / [2] 1. Applicable to cockpit door jambs. 2. Applicable to cockpit door.


### DISPOSITION: 2 = Incorporate part bearing NEW PN 3 = Replace part bearing OLD PN with part bearing NEW PN 5 = Discard part bearing OLD PN 7 = Replace with part bearing same PN 8 = Reuse part bearing OLD PN 

# SERVICE BULLETIN

DATE: 10/Feb/2011 REVISION No.:01 - 01/Aug/2011 

### SB No.: 170-52-0055 PAGE: 9 Copyright © 2011 by Embraer S.A. All rights reserved.

### (2) MATERIAL TO BE PROCURED (a) Parts None. (b) Consumable Materials None. D. MATERIAL NECESSARY FOR EACH SPARE
None. E. REIDENTIFIED PARTS The information necessary to reidentify the parts is presented in table below:

DESCRIPTION OLD PN NEW PN Cockpit Door Assy 170-96021-401 170-96021-637 Cockpit Door Assy 170-96021-601 170-96021-625 Cockpit Door Assy 170-96021-605 170-96021-629 Cockpit Door Assy 170-96021-609 170-96021-633 Cockpit Door Assy 170-96021-611 170-96021-637 Cockpit Door Assy 170-96021-615 170-96021-625 Cockpit Door Assy 170-96021-619 170-96021-629 Cockpit Door Assy 170-96021-623 170-96021-633 Cockpit Door Assy 170-96021-403 170-96021-639 Cockpit Door Assy 170-96021-603 170-96021-627 Cockpit Door Assy 170-96021-607 170-96021-631 Cockpit Door Assy 170-96021-407 170-96021-635 Cockpit Door Assy 170-96021-613 170-96021-639 Cockpit Door Assy 170-96021-617 170-96021-627 

# SERVICE BULLETIN

SB No.: 170-52-0055 PAGE: 10 DATE: 10/Feb/2011 REVISION No.: 01 - 01/Aug/2011 Copyright © 2011 by Embraer S.A. All rights reserved.

### DESCRIPTION OLD PN NEW PN Cockpit Door Assy 170-96021-621 170-96021-631 Cockpit Door Assy 170-96021-409 170-96021-635 Cockpit Door Assy 170-96170-401 170-96170-621 Cockpit Door Assy 170-96170-601 170-96170-615 Cockpit Door Assy 170-96170-603 170-96170-617 Cockpit Door Assy 170-96170-605 170-96170-619 Cockpit Door Assy 170-96170-607 170-96170-621 Cockpit Door Assy 170-96170-609 170-96170-615 Cockpit Door Assy 170-96170-611 170-96170-617 Cockpit Door Assy 170-96170-613 170-96170-619 Cockpit Door Assy 170-96198-401 170-96198-625 Cockpit Door Assy 170-96198-601 170-96198-613 Cockpit Door Assy 170-96198-603 170-96198-617 Cockpit Door Assy 170-96198-405 170-96198-621 Cockpit Door Assy 170-96198-605 170-96198-625 Cockpit Door Assy 170-96198-609 170-96198-613 Cockpit Door Assy 170-96198-611 170-96198-617 Cockpit Door Assy 170-96198-403 170-96198-615 Cockpit Door Assy 170-96198-607 170-96198-615 Cockpit Door Assy 170-96198-407 170-96198-623 Cockpit Door Assy 170-98752-401 170-98752-621 Cockpit Door Assy 170-98752-601 170-98752-615 Cockpit Door Assy 170-98752-603 170-98752-617 Cockpit Door Assy 170-98752-605 170-98752-619 Cockpit Door Assy 170-98752-607 170-98752-621 Cockpit Door Assy 170-98752-609 170-98752-615 Cockpit Door Assy 170-98752-611 170-98752-617 

# SERVICE BULLETIN

DATE: 10/Feb/2011 REVISION No.:01 - 01/Aug/2011 

### SB No.: 170-52-0055 PAGE: 11 Copyright © 2011 by Embraer S.A. All rights reserved.

### DESCRIPTION OLD PN NEW PN Cockpit Door Assy 170-98752-613 170-98752-619 Cockpit Door Assy 171-03990-401 171-03990-637 Cockpit Door Assy 171-03990-601 171-03990-625 Cockpit Door Assy 171-03990-605 171-03990-629 Cockpit Door Assy 171-03990-609 171-03990-633 Cockpit Door Assy 171-03990-611 171-03990-637 Cockpit Door Assy 171-03990-615 171-03990-625 Cockpit Door Assy 171-03990-619 171-03990-629 Cockpit Door Assy 171-03990-623 171-03990-633 Cockpit Door Assy 171-03990-403 171-03990-639 Cockpit Door Assy 171-03990-603 171-03990-627 Cockpit Door Assy 171-03990-607 171-03990-631 Cockpit Door Assy 171-03990-407 171-03990-635 Cockpit Door Assy 171-03990-613 171-03990-639 Cockpit Door Assy 171-03990-617 171-03990-627 Cockpit Door Assy 171-03990-621 171-03990-631 Cockpit Door Assy 171-03990-409 171-03990-635 Cockpit Door Assy 171-04002-401 171-04002-625 Cockpit Door Assy 171-04002-601 171-04002-613 Cockpit Door Assy 171-04002-603 171-04002-617 Cockpit Door Assy 171-04002-405 171-04002-621 Cockpit Door Assy 171-04002-605 171-04002-625 Cockpit Door Assy 171-04002-609 171-04002-613 Cockpit Door Assy 171-04002-611 171-04002-617 Cockpit Door Assy 171-04002-403 171-04002-615 Cockpit Door Assy 171-04002-607 171-04002-615 Cockpit Door Assy 171-04002-407 171-04002-623 

# SERVICE BULLETIN

SB No.: 170-52-0055 PAGE: 12 DATE: 10/Feb/2011 REVISION No.: 01 - 01/Aug/2011 Copyright © 2011 by Embraer S.A. All rights reserved.

### DESCRIPTION OLD PN NEW PN Cockpit Door Assy 171-04008-401 171-04008-625 Cockpit Door Assy 171-04008-601 171-04008-613 Cockpit Door Assy 171-04008-603 171-04008-617 Cockpit Door Assy 171-04008-405 171-04008-621 Cockpit Door Assy 171-04008-605 171-04008-625 Cockpit Door Assy 171-04008-609 171-04008-613 Cockpit Door Assy 171-04008-611 171-04008-617 Cockpit Door Assy 171-04008-403 171-04008-615 Cockpit Door Assy 171-04008-607 171-04008-615 Cockpit Door Assy 171-04008-407 171-04008-623 Cockpit Door Assy 171-04727-401 171-04727-625 Cockpit Door Assy 171-04727-601 171-04727-613 Cockpit Door Assy 171-04727-603 171-04727-617 Cockpit Door Assy 171-04727-405 171-04727-621 Cockpit Door Assy 171-04727-605 171-04727-625 Cockpit Door Assy 171-04727-609 171-04727-613 Cockpit Door Assy 171-04727-611 171-04727-617 Cockpit Door Assy 171-04727-403 171-04727-615 Cockpit Door Assy 171-04727-607 171-04727-615 Cockpit Door Assy 171-04727-407 171-04727-623 Cockpit Door Assy 171-08455-401 171-08455-603 Cockpit Door Assy 171-08455-403 171-08455-607 Cockpit Door Assy 171-08455-601 171-08455-603 Cockpit Door Assy 171-08455-405 171-08455-609 Cockpit Door Assy 190-16461-401 190-16461-625 Cockpit Door Assy 190-16461-601 190-16461-613 Cockpit Door Assy 190-16461-603 190-16461-617 

# SERVICE BULLETIN

DATE: 10/Feb/2011 REVISION No.:01 - 01/Aug/2011 

### SB No.: 170-52-0055 PAGE: 13 Copyright © 2011 by Embraer S.A. All rights reserved.

### DESCRIPTION OLD PN NEW PN Cockpit Door Assy 190-16461-405 190-16461-621 Cockpit Door Assy 190-16461-605 190-16461-625 Cockpit Door Assy 190-16461-609 190-16461-613 Cockpit Door Assy 190-16461-611 190-16461-617 Cockpit Door Assy 190-16461-403 190-16461-615 Cockpit Door Assy 190-16461-607 190-16461-615 Cockpit Door Assy 190-16461-407 190-16461-623 Cockpit Door Assy 190-17111-401 190-17111-625 Cockpit Door Assy 190-17111-601 190-17111-613 Cockpit Door Assy 190-17111-603 190-17111-617 Cockpit Door Assy 190-17111-405 190-17111-621 Cockpit Door Assy 190-17111-605 190-17111-625 Cockpit Door Assy 190-17111-609 190-17111-613 Cockpit Door Assy 190-17111-611 190-17111-617 Cockpit Door Assy 190-17111-403 190-17111-615 Cockpit Door Assy 190-17111-607 190-17111-615 Cockpit Door Assy 190-17111-409 190-17111-627 Cockpit Door Assy 190-17111-407 190-17111-623 Cockpit Door Assy 190-19435-401 190-19435-603 Cockpit Door Assy 190-19435-403 190-19435-605 Cockpit Door Assy 190-19435-601 190-19435-603 Cockpit Door Assy 190-19435-405 190-19435-607 Cockpit Door Assy 191-10716-401 191-10716-601 Cockpit Door Assy 191-10716-403 191-10716-603 Cockpit Door Assy 191-12848-401 191-12848-601 Cockpit Door Assy 191-12848-403 191-12848-603 Cockpit Door Assy 191-12857-401 191-12857-601 

# SERVICE BULLETIN

SB No.: 170-52-0055 PAGE: 14 DATE: 10/Feb/2011 REVISION No.: 01 - 01/Aug/2011 Copyright © 2011 by Embraer S.A. All rights reserved.

### DESCRIPTION OLD PN NEW PN Cockpit Door Assy 191-12857-403 191-12857-603 Cockpit Door Assy 191-12892-401 191-12892-601 Cockpit Door Assy 191-12892-403 191-12892-603


### F. TOOLING - PRICE AND AVAILABILITY Whenever required, the necessary tooling presented in the AMM Tasks referred to in this bulletin, should be procured from the operator’s inventories or ordered as spares. 

# SERVICE BULLETIN

DATE: 10/Feb/2011 REVISION No.:01 - 01/Aug/2011 

### SB No.: 170-52-0055 PAGE: 15 Copyright © 2011 by Embraer S.A. All rights reserved.

### 3. ACCOMPLISHMENT INSTRUCTIONS NOTE: 1) Obey all of the WARNINGS and CAUTIONS included in the referenced manuals and procedures. 2) The Manuals and other documents are referred to by acronyms or using a simplified form. Refer to section 1.J. REFERENCES for a more complete definition. 3) This Service Bulletin effectivity is divided into 03 aircraft GROUPS, according to the relevant configuration and the SB itself is divided into 03 PARTS. The SB PARTS are featured to allow their independent accomplishment. REFERENCE APPLICATION TABLE Aircraft GROUP SB PART APPLICABLE FIGURES 1 I, II and III [1] Figure 1 , Figure 2 and Figure 3 [1] 2 II and III [1] Figure 2 and Figure 3 [1] 3 II and III [1] Figure 2 and Figure 3 [1] 1. After the accomplishment of PART II, if applicable, the accomplishment of PART III may be necessary. 

### 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 - Standard Procedures. B. PART I (1) Replace the cockpit door passive lock striker and quick-release pin with new ones, according to Figure 1

. C. PART II (1) Inspect the upper and lower hinges from cockpit door, according to Figure 2

. D. PART III (1) Replace the upper and lower hinges from cockpit door and jambs according to Figure 3

. 

# SERVICE BULLETIN

SB No.: 170-52-0055 PAGE: 16 DATE: 10/Feb/2011 REVISION No.: 01 - 01/Aug/2011 Copyright © 2011 by Embraer S.A. All rights reserved.

### E. Restore the aircraft to normal. F. Enter the accomplishment of this bulletin in the applicable documents. NOTE: 1) Please inform us by e-mail fleet.reliability@embraer.com.br of the aircraft manufacturer serial number and the SB incorporation date, specifying the SB Part(s) incorporated or whether the whole SB has been incorporated. This will enable Embraer to consider your aircraft configuration when providing future modifications. 2) To formally inform that the SB has been incorporated fleet-wide or that the SB will not be incorporated, so that Embraer can update the affected technical publications, use the “Service Bulletin Full-Fleet Incorporation Report” form, which is available on the Flyembraer portal (http://www.flyembraer.com). 3) Use the attached “Service Bulletin Evaluation” form to send us your comments regarding this SB. Your feedback will be much appreciated as an aid for us to improve the quality of the SBs. 

# SERVICE BULLETIN

DATE: 10/Feb/2011 REVISION No.:01 - 01/Aug/2011 

### SB No.: 170-52-0055 PAGE: 17 Copyright © 2011 by Embraer S.A. All rights reserved.

### 1. Remove the cockpit door. Refer to AMM TASK 52-51-01-000-801-A/400 - Cockpit Door - Removal. 2. Remove and discard striker PN 170-96130-001, shim PN 170-96140-001 and screws PN MS24693-C5 or PN MS24693-C6 (02 positions). 3. Remove and retain screw PN NAS1132E5 (2 positions) and remove and discard washer PN NAS1149DN816K (2 positions) from the door frame. 4. Remove and retain pin PN 170-96097-001, washer PN NAS1149D0432K, remove and discard ring PN MS16624-2025 and quick-release pin PN BLC4BA11SL4A7. 5. Reinstall retained pin PN 170-96097-001 using washer PN NAS1149D0432K (2 positions) and ring PN MS16624-2025. 6. Reinstall the cockpit door. Refer to AMM TASK 52-51-01-400-801-A/400 - Cockpit Door - Installation. 7. Position striker PN 171-14450-401 using retained screw PN NAS1132E5 (2 positions) and new washer PN NAS1149DN816K (2 positions), and washer PN MS35338-137 (02 positions) supplied in the kit without completely driving the screws. 8. Install new quick-release pin and then, close the door. After that, manually move the striker until it touches the passive lock uniformly. 9. Drive the existing Allen screws of the striker until they reach the door frame. NOTE: The Allen screws are used to adjust the striker. 10.Make sure that the Allen screws are reaching the cockpit door frame, and then, attach striker PN 171-14450-401 by driving firstly the lower screw PN NAS1132E5 (1 position). After that, open the door and drive the upper screw PN NAS1132E5 (1 position). 11. Open and close the door to check for interference between the striker and the passive lock: (a) If there is no interference, perform step 12. 

# SERVICE BULLETIN

SB No.: 170-52-0055 PAGE: 18 DATE: 10/Feb/2011 REVISION No.: 01 - 01/Aug/2011 FIGUR E 1 - REPLACEMENT OF COCKPIT DOOR PASSIVE LOCK STRIKER 

### (SHEET 01 OF 08)

Copyright © 2011 by Embraer S.A. All rights reserved.

### (b) If there is any interference, loosen the screws, readjust the striker, and perform step 8 above and on. 12.Close the door, and remove and reinstall the quick-release pin to check for interference with lanyard cable loop clamp: (a) If there is no interference, perform step 13. (b) If there is any interference, adjust laterally the lanyard cable loop clamp, and perform step 13. NOTE: The quick-release pin should be freely removed . 13.Reidentify the cockpit door as follows: (a) Remove and discard the existing placard (1 positions) according to AMM TASK 20-10-09-000-801-A/400 - Placards and Markings - Removal. NOTE: The cockpit door placard can be positioned in one of the places shown in detail E according to aircraft configuration. (b) Fill out placard PN 171-08458-001 (1 positions) with the new identification number, as indicated in paragraph 2.E. REIDENTIFIED PARTS , using a felt-tip pen. NOTE: Use the information presented in removed placard to fill out the remaining fields. (c) Install reidentified placard 171-08458-001 according to AMM TASK 20-10-09-400- 801-A/400 - Placards and Markings - Installation. Refer to Detail E

. 

# SERVICE BULLETIN

DATE: 10/Feb/2011 REVISION No.:01 - 01/Aug/2011 

### SB No.: 170-52-0055 PAGE: 19 FIGUR E 1 - REPLACEMENT OF COCKPIT DOOR PASSIVE LOCK STRIKER 

### (SHEET 02 OF 08)

Copyright © 2011 by Embraer S.A. All rights reserved.

### A ZONES 221/222 223/224



## A COCKPIT BULKHEAD (REF.) COCKPIT DOOR (REF.)



### BEM170SB520951A.DGN 

### D 

# SERVICE BULLETIN

SB No.: 170-52-0055 PAGE: 20 DATE: 10/Feb/2011 REVISION No.: 01 - 01/Aug/2011 FIGUR E 1 - REPLACEMENT OF COCKPIT DOOR PASSIVE LOCK STRIKER 

### (SHEET 03 OF 08)

Copyright © 2011 by Embraer S.A. All rights reserved.PRE − MOD 

## B 2 2 2



### C PASSIVE LOCK (REF.)

4 4 STRIKER PN 170−96130−001 (REMOVE AND DISCARD) SHIM PN 170−96140−001 (REMOVE AND DISCARD) SCREW PN MS24693−C5 OR PN MS24693−C6 (REMOVE AND DISCARD) COCKPIT DOOR FRAME (REF.) 1

4

WASHER PN NAS1149D0432K (REMOVE AND RETAIN) RING PN MS16624−2025 (REMOVE AND DISCARD) PIN PN 170−96097−001 (REMOVE AND RETAIN)EM170SB520952A.DGN COCKPIT DOOR (REMOVE AND RETAIN)

QUICK−RELEASE PIN PN BLC4BA11SL4A7 (REMOVE AND DISCARD) 3 SCREW PN NAS1132E5 (REMOVE AND RETAIN) WASHER PN NAS1149DN816K (1 POSITION) (REMOVE AND DISCARD)

3 SCREW PN NAS1132E5 (REMOVE AND RETAIN) WASHER PN NAS1149DN816K (1 POSITION) (REMOVE AND DISCARD) 

# SERVICE BULLETIN

DATE: 10/Feb/2011 REVISION No.:01 - 01/Aug/2011 

### SB No.: 170-52-0055 PAGE: 21 FIGUR E 1 - REPLACEMENT OF COCKPIT DOOR PASSIVE LOCK STRIKER 

### (SHEET 04 OF 08)

Copyright © 2011 by Embraer S.A. All rights reserved.

## B
POST − MOD 

### C
PASSIVE LOCK (REF.) 7 10

7 10 7 8 10 DOOR FRAME (REF.) 8

5 6

WASHER PN NAS1149D0432K (REINSTALL) RING PN MS16624−2025 (INSTALL)

5PIN

PN 170−96097−001 (REINSTALL) WASHER PN NAS1149D0432K (INSTALL) ALLEN SCREW (ADJUST)

9

ALLEN SCREW (ADJUST)

9 COCKPIT DOOR (REINSTALL) (OPEN AND CLOSE) 11

8 STRIKER PN 171−14450−401 (POSITION) (INSTALL) NEW QUICK RELEASE PIN (INSTALL)

SCREW PN NAS1132E5 (1 POSITION) (REINSTALL) WASHER PN NAS1149DN816K (1 POSITION) WASHER PN MS35338−137 (1 POSITION) (INSTALL)

SCREW PN NAS1132E5 (1 POSITION) (REINSTALL) WASHER PN NAS1149DN816K (1 POSITION) WASHER PN MS35338−137 (1 POSITION) (INSTALL) LANYARD CABLE LOOP CLAMP (REF.)

12

12EM170SB520953B.DGN 

# SERVICE BULLETIN

SB No.: 170-52-0055 PAGE: 22 DATE: 10/Feb/2011 REVISION No.: 01 - 01/Aug/2011 FIGUR E 1 - REPLACEMENT OF COCKPIT DOOR PASSIVE LOCK STRIKER 

### (SHEET 05 OF 08)

Copyright © 2011 by Embraer S.A. All rights reserved.PRE − MOD FRONT VIEW

FRONT VIEW POST − MOD PASSIVE LOCK (REF.) STRIKER PN 170−96130−001 SHIM PN 170−96140−001 SCREW PN MS24693−C5 OR PN MS24693−C6 (REMOVE AND DISCARD) 4

4

PASSIVE LOCK

(REF.) STRIKER PN 171−14450−401 (INSTALL)

EXISITING ALLEN SCREWS (ADJUST)

7 3



## C

C 2

5

9 10 8

1 1

STRIKER MUST TOUCH THE PASSIVE LOCK SURFACE. PIN PN 170−96097−001 WASHER PN NAS1149D0432K (REINSTALL) WASHER PN NAS1149D0432K (INSTALL) RING PN MS16624−2025 (INSTALL) QUICK RELEASE PIN (REMOVE AND DISCARD)

PIN PN 170−96097−001 WASHER PN NAS1149D0432K (REMOVE AND RETAIN) RING PN MS16624−2025 (REMOVE AND DISCARD)

8 QUICK RELEASE PIN (INSTALL) SCREW PN NAS1132E5 WASHER PN NAS1149DN816K (2 POSITIONS) (REMOVE AND RETAIN)

LANYARD CABLE LOOP CLAMP (REF.)

12

12EM170SB520954B.DGN 

# SERVICE BULLETIN

DATE: 10/Feb/2011 REVISION No.:01 - 01/Aug/2011 

### SB No.: 170-52-0055 PAGE: 23 FIGUR E 1 - REPLACEMENT OF COCKPIT DOOR PASSIVE LOCK STRIKER 

### (SHEET 06 OF 08)

Copyright © 2011 by Embraer S.A. All rights reserved.NOTE: DIMENSIONS IN mm TYPICAL INSIDE COCKPIT VIEW 1.4 PLACARD PN 171−08458−001 (REPLACE AND REIDENTIFY, AS APPLICABLE)

PLACARD PN 171−08458−001 (REPLACE AND REIDENTIFY, AS APPLICABLE) 80.0

1.0

10.0



## D E

E 13

13EM170SB520955B.DGN 

# SERVICE BULLETIN

SB No.: 170-52-0055 PAGE: 24 DATE: 10/Feb/2011 REVISION No.: 01 - 01/Aug/2011 FIGUR E 1 - REPLACEMENT OF COCKPIT DOOR PASSIVE LOCK STRIKER 

### (SHEET 07 OF 08)

Copyright © 2011 by Embraer S.A. All rights reserved.

## E
TYPICAL PLACARD PN 171−08458−001 (REPLACE AND REIDENTIFY)

13EM170SB520956B.DGN 

# SERVICE BULLETIN

DATE: 10/Feb/2011 REVISION No.:01 - 01/Aug/2011 

### SB No.: 170-52-0055 PAGE: 25 FIGUR E 1 - REPLACEMENT OF COCKPIT DOOR PASSIVE LOCK STRIKER 

### (SHEET 08 OF 08)

Copyright © 2011 by Embraer S.A. All rights reserved.

### 1. Visually check if a shim is installed in the upper and lower hinges assembly of the cockpit door, according to details B and D , and sections C-C and E-E : (a) If any discrepancy is detected, perform step 2 below. (b) If no discrepancy is detected, no additional action is required. 2. Remove the upper and lower hinge, according to AMM TASK 52-51-01-000-802-A/400 - Cockpit Door Hinges - Removal, and inspect if the upper hinge is PN 170-96137-403 and if the lower hinge is PN 170-96133-403 or PN 170-96133-405. Refer to details B and D , and sections C-C and E-E :. NOTE: The part number is located at the rear side of the hinge. (a) If any discrepancy is detected, replace the existing upper hinge and lower hinges, according to PART III of this bulletin. (b) If no discrepancy is detected, reinstall the removed upper and lower hinges,according to AMM TASK 52-51-01-400-802-A/400 - Cockpit Door Hinges - Installation. 

# SERVICE BULLETIN

SB No.: 170-52-0055 PAGE: 26 DATE: 10/Feb/2011 REVISION No.: 01 - 01/Aug/2011 FIGUR E 2 - INSPECTION OF COCKPIT DOOR HINGES 

### (SHEET 01 OF 03)

Copyright © 2011 by Embraer S.A. All rights reserved.

## B A ZONES 221/222 223/224



## A B

C C

UPPER HINGE (REF.) COCKPIT DOOR (REF.)

COCKPIT BULKHEAD (REF.)



## C−C UPPER HINGE PN 170−96137−401 (INSPECT, IF APPLICABLE)

SHIM (INSPECT) COCKPIT DOOR ELECTROMECHANICAL LATCH 

### D COCKPIT DOOR COCKPIT BULKHEAD

2

1EM170SB520980A.DGN 

# SERVICE BULLETIN

DATE: 10/Feb/2011 REVISION No.:01 - 01/Aug/2011 

### SB No.: 170-52-0055 PAGE: 27 FIGUR E 2 - INSPECTION OF COCKPIT DOOR HINGES 

### (SHEET 02 OF 03)

Copyright © 2011 by Embraer S.A. All rights reserved.EM170SB520981A.DGN 

### E E

SHIM (INSPECT) 2

1 COCKPIT DOOR (REF.)

COCKPIT BULKHEAD (REF.)

UPPER HINGE (REF.)



## E−E D

LOWER HINGE PN 170−96133−401 OR PN 170−96133−403 (INSPECT, IF APPLICABLE)



# SERVICE BULLETIN

SB No.: 170-52-0055 PAGE: 28 DATE: 10/Feb/2011 REVISION No.: 01 - 01/Aug/2011 FIGUR E 2 - INSPECTION OF COCKPIT DOOR HINGES 

### (SHEET 03 OF 03)

Copyright © 2011 by Embraer S.A. All rights reserved.

### 1. Remove the hinges from the cockpit door jambs as follows: (a) Remove and discard upper hinge PN 170-96137-401 and retain the existing screws PN MS27039

−0808 (2 positions) from the cockpit door jambs, according to detail B

. Refer to AMM TASK 52-51-01-000-802-A/400 - Cockpit Door Hinges - Removal. (b) Remove and discard lower hinge PN 170

−96133

−401 and retain the existingscrews PN NAS1132E3 (2 positions) and washer PN NAS1149DN816K (2 positions) from the cockpit door jambs, according to detail E . Refer to AMM TASK 52-51-01-000-802-A/400 - Cockpit Door Hinges - Removal. 2. Remove the hinges from the cockpit door as follows: (a) Remove and discard upper hinge PN 170-96068-401, spring pin PN PE25041- 055-03 and retain the existing screws PN MS24693C52 (2 positions) from the cockpit door. Refer to detail B and AMM TASK 52-51-01-000-802-A/400 - Cockpit Door Hinges - Removal. (b) Remove and discard lower hinge PN 170-96076-401, spring pin PE25041-055-03 and retain the existing screws MS24693C52 from the cockpit door. Refer to detail D and AMM TASK 52-51-01-000-802-A/400 - Cockpit Door Hinges - Removal. 3. Install hinges in the cockpit door jambs as follows: (a) Install upper hinge PN 170-96137-403, using retained screw PN MS27039

−0808 (2 positions) according to detail B . AMM TASK 52-51-01-400-802-A/400 - Cockpit Door Hinges - Installation. (b) Install lower hinge with PN 170-96133-405, using retained screw PN NAS1132E3 (2 positions) and washer PN NAS1149DN816K (2 positions) according to detail E

. Refer to AMM TASK 52-51-01-400-802-A/400 - Cockpit Door Hinges - Installation. 4. Install hinges in the in the cockpit door as follows: (a) Install upper hinge PN 170-96068-403 and shim PN 171-12687-001, using retained screw PN MS24693C52 (2 positions) and spring pin PE25041-055-03 wet in 

# SERVICE BULLETIN

DATE: 10/Feb/2011 REVISION No.:01 - 01/Aug/2011 

### SB No.: 170-52-0055 PAGE: 29 FIGUR E 3 - REPLACEMENT OF COCKPIT DOOR HINGES 

### (SHEET 01 OF 04)

Copyright © 2011 by Embraer S.A. All rights reserved.

### Corrosion Inhibiting Compound (MEP_09-075) COR-BAN 27L , according to detail C . Refer to AMM TASK 52-51-01-400-802-A/400 - Cockpit Door Hinges - Installation. (b) Install lower hinge with PN 170-96076-403 and shim PN 171-12686-001, using retained screw PN MS24693C52 (2 positions) and spring pin PE25041-055-03 wet in Corrosion Inhibiting Compound (MEP_09-075) COR-BAN 27L , according to detail D . Refer to AMM TASK 52-51-01-400-802-A/400 - Cockpit Door Hinges - Installation. 

# SERVICE BULLETIN

SB No.: 170-52-0055 PAGE: 30 DATE: 10/Feb/2011 REVISION No.: 01 - 01/Aug/2011 FIGUR E 3 - REPLACEMENT OF COCKPIT DOOR HINGES 

### (SHEET 02 OF 04)

Copyright © 2011 by Embraer S.A. All rights reserved.EM170SB520972A.DGN 

### A ZONES 221/222 223/224



## A B



## B COCKPIT DOOR (REF.) COCKPIT BULKHEAD (REF.) COCKPIT BULKHEAD (REF.)

DOOR JAMBS (REF.) 1 3

UPPER HINGE PN 170−96137−401 (REMOVE AND DISCARD) PN 170−96137−403 (INSTALL) 4 2 1 SHIM PN 171−12687−001 (INSTALL)

UPPER HINGE PN 170−96068−401 (REMOVE AND DISCARD) PN 170−96068−403 (INSTALL) 4 2 

### C

D E

COCKPIT DOOR (REF.)

1 4

1 3 SCREW PN MS27039−0808 (2 POSITIONS) (REUSE)



## C SCREW PN MS24693−C52 (2 POSITIONS) (REUSE) SPRING PIN PN PE25041−055−03 (REPLACE)

INSTALL SPRING PIN WET IN SEALANT PN COR−BAN 27L (SPEC. MEP09−075). 

# SERVICE BULLETIN

DATE: 10/Feb/2011 REVISION No.:01 - 01/Aug/2011 

### SB No.: 170-52-0055 PAGE: 31 FIGUR E 3 - REPLACEMENT OF COCKPIT DOOR HINGES 

### (SHEET 03 OF 04)

Copyright © 2011 by Embraer S.A. All rights reserved.EM170SB520979A.DGN SCREW PN NAS1132E3 WASHER PN NAS1149DN816K (2 POSITIONS) (REUSE) DOOR JAMBS (REF.)

1 1 2 4 4 2 1

COCKPIT DOOR (REF.)

3

3 LOWER HINGE PN 170−96076−401 (REMOVE AND DISCARD) PN 170−96076−403 (INSTALL)


## D

E LOWER HINGE PN 170−96133−401 (REMOVE AND DISCARD) PN 170−96133−405 (INSTALL)

1 4 SHIM PN 171−12686−001 (INSTALL)

INSTALL SPRING PIN WET IN SEALANT PN COR−BAN 27L (SPEC. MEP09−075). SCREW PN MS24693−C52 (2 POSITIONS) (REUSE) SPRING PIN PN PE25041−055−03 (REPLACE) 

# SERVICE BULLETIN

SB No.: 170-52-0055 PAGE: 32 DATE: 10/Feb/2011 REVISION No.: 01 - 01/Aug/2011 FIGUR E 3 - REPLACEMENT OF COCKPIT DOOR HINGES 

### (SHEET 04 OF 04)

Copyright © 2011 by Embraer S.A. All rights reserved.

## SERVICE BULLETIN EVALUATION

THE PURPOSE OF THIS FORM IS TO COLLECT DATA THAT WILL BE USED TO IMPROVE THE QUALITY OF OUR SERVICE BULLETINS AND UPDATE THE TECHNICAL PUBLICATIONS. PLEASE FILL IN FORM AND RETURN IT TO: EMBRAER - EMPRESA BRASILEIRA DE AERONÁUTICA S.A. EFTC - SERVICE BULLETIN ENGINEERING AV. BRIGADEIRO FARIA LIMA, 2170 SÃO JOSÉ DOS CAMPOS - SP - 12227-901 BRASIL Fax: + 55 12 3927-6600 (ext. 1624) e-mail: fleet.reliability@embraer.com.br S.B. Title: S.B.: (Number / Rev.) Operator:
SB Implementation Report Aircraft Serial Number or Registration Number: Incorporation Date: Aircraft Flight Hours: Aircraft Landings:

POST-ACCOMPLISHMENT EVALUATION: (Check applicable squares below) ESTIMATED MANPOWER: [ ] OK [ ] NOT OK (Explain Below) MATERIAL & KITS: [ ] OK [ ] NOT OK (Explain Below) ACCOMPLISHMENT INSTRUCTIONS: [ ] OK [ ] NOT OK (Explain Below) FIGURES: [ ] OK [ ] NOT OK (Explain Below) SB GENERAL EVALUATION: [ ] OK [ ] NOT OK (Explain Below) COMMENTS: (Bulletin quality/ Difficulties found at the time of incorporation/ Suggested improvements/ Other)

Organization: Fax: Phone:
E-mail: Address: Prepared by:(Name/Title) Date:

Copyright © 2011 by Embraer S.A. All rights reserved.