This document transmits Revision 2 to Service Bulletin RB211-71-AG698 Document History Service Bulletin Revision Status Supplement Revision Status Initial Issue Oct.14/11 Revision 1 Sep.28/12 Bulletin Revision 2 Remove Incorporate Reason for change All pages of the Service Bulletin Pages 1 to 16 of the Service Bulletin To revise 1.A. Effectivity, 1.I. References, 3.A. Accomplishment Instructions and Appendix 2, correcting air intake cowl serial numbers and add reference to Bombardier Service Bulletin RB211-E4-A1003 (RR RMR 11841).**Printed in Great Britain** Jun.20/13

RB211-535E4 SERIES PROPULSION SYSTEMS NON-MODIFICATION SERVICE BULLETIN



# RB.211−71−AG698 Transmittal - Page 1 of 3 Signed Date 

# ALERT

ALERTAll pages of Appendix 1 Pages 1 to 7 of Appendix 1 To revise 1.A. Effectivity, 1.I. References, 3.A. Accomplishment Instructions and Appendix 2, correcting air intake cowl serial numbers and add reference to Bombardier Service Bulletin RB211-E4-A1003 (RR RMR 11841). All pages of Appendix 2 Page 1 and 2 of Appendix 2 To revise 1.A. Effectivity, 1.I. References, 3.A. Accomplishment Instructions and Appendix 2, correcting air intake cowl serial numbers and add reference to Bombardier Service Bulletin RB211-E4-A1003 (RR RMR 11841). All pages of Appendix 3 Pages 1 to 6 of Appendix 3 To revise 1.A. Effectivity, 1.I. References, 3.A. Accomplishment Instructions and Appendix 2, correcting air intake cowl serial numbers and add reference to Bombardier Service Bulletin RB211-E4-A1003 (RR RMR 11841). All pages of Appendix 4 Pages 1 to 5 of Appendix 4 To revise 1.A. Effectivity, 1.I. References, 3.A. Accomplishment Instructions and Appendix 2, correcting air intake cowl serial numbers and add reference to Bombardier Service Bulletin RB211-E4-A1003 (RR RMR 11841).**Printed in Great Britain**



# RB.211−71−AG698 Transmittal - Page 2LIST OF EFFECTIVE PAGES The effective pages to this Service Bulletin following incorporation of Revision 2 are as follows: Page Revision Number Revision Date

Bulletin R 1 2 Jun.20/13 R 2 2 Jun.20/13 R 3 2 Jun.20/13 R 4 2 Jun.20/13 R 5 2 Jun.20/13 R 6 2 Jun.20/13 R 7 2 Jun.20/13 R 8 2 Jun.20/13 R 9 2 Jun.20/13 R 10 2 Jun.20/13 R 11 2 Jun.20/13 R 12 2 Jun.20/13 R 13 2 Jun.20/13 R 14 2 Jun.20/13 R 15 2 Jun.20/13 R 16 2 Jun.20/13 Appendix 1 R 1 2 Jun.20/13 R 2 2 Jun.20/13 R 3 2 Jun.20/13 R 4 2 Jun.20/13 R 5 2 Jun.20/13 R 6 2 Jun.20/13 R 7 2 Jun.20/13 Appendix 2 R 1 2 Jun.20/13 R 2 2 Jun.20/13 Appendix 3 R 1 2 Jun.20/13 R 2 2 Jun.20/13 R 3 2 Jun.20/13 R 4 2 Jun.20/13 R 5 2 Jun.20/13 R 6 2 Jun.20/13 Appendix 4 R 1 2 Jun.20/13 R 2 2 Jun.20/13 R 3 2 Jun.20/13 R 4 2 Jun.20/13 R 5 2 Jun.20/13**Printed in Great Britain**



# RB.211−71−AG698 Transmittal - Page 31. Planning Information A. Effectivity Boeing 757 RB211-535E4-37, -535E4-37/10, -535E4-37/11, -535E4-37/12, -535E4-37/14, -535E4-37/15, -535E4-37/16, -535E4-37/17, -535E4-37/19, -535E4-37/20, -535E4-37/21, -535E4-37/23, -535E4-37/24, -535E4-37/25, -535E4-37/39, -535E4-37/43, -535E4-37/44 Propulsion Systems. RB211-535E4-B-37, -535E4-B-37/15, -535E4-B-37/19, -535E4-B-37/20, -535E4-B-37/21, -535E4-B-37/25, -535E4-B-37/35, -535E4-B-37/39, -535E4-B-37/41, -535E4-B-37/44 Propulsion Systems. RB211-535E4-C-37, -535E4-C-37/43 Propulsion Systems. Air Intake Cowl Serial Numbers: SB/RR/4001 to SB/RR/4484 (LJ30000 series part numbers: LJ35708, LJ35810, LJ38036, LJ38066, LJ38068, LJ39447, LJ39448 (Pre SB 71-9634, Dyna-Rohr standard)). SB/RR/9001 to SB/RR/9786 R (LJ50000 series part numbers: LJ50501, LJ50675, LJ50678 and LJ50812 (SB 71-9634)). Excluding air intake cowls that have been modified by a Supplementary type certificate, identified by the following marking adjacent to the modification plate on the rear bulkhead. Refer to Bombardier Service Bulletin RB211-E4-A1003, latest revision, for instructions relating to these air intake cowls. R R R Bombardier Aerospace STC - CAA.21NE2.00023 FAA - ST02102NY TCCA - SSA05-25 POWERPLANT - AIR INTAKE COWL - REPLACEMENT OF THE FORWARD BULKHEAD ASSEMBLY, THERMAL ANTI-ICE (TAI) SPRAY RING ASSEMBLY AND ATTACHMENT FITTINGS - NON-MODIFICATION SERVICE BULLETIN - NON - MOD.71-AG698**Printed in Great Britain**



# RB.211−71−AG698 Page 1 of 16 Oct.14/11 R Jun.20/13B. Reason There is a known in-service issue relating to cracking of the forward bulkhead web, web stiffeners, attachment angles, and to a lesser extent, on the Thermal Anti Ice (TAI) spray ring affecting the RB211-535E4, 535E4-B and 535E4-C air intake cowls (refer to Fig.1 and Fig.2). This cracking is typically found during shop visits for incidental damage. A detailed assessment of these findings concluded there is a need to replace the affected components with new to maintain serviceability. Further analysis concluded that this issue is deemed to be life related; therefore there is a need to remove and replace the affected components within a prescribed timescale starting with those units introduced into service first. This Non-Modification Service Bulletin (NMSB) instructs the removal of the air intake cowl and replacement of the forward bulkhead assembly, the TAI spray ring and its associated attachment fittings before the air intake is allowed to be returned to service. Operators are also requested to provide details of the findings to further aid problem understanding. Modification(s) are being processed in order to address this issue. R Revision 1 of this NMSB was issued to include minor non-technical changes. R Revision 2 of this NMSB is issued to correct the air intake cowl serial numbers in 1.A.Effectivity, 3.A Accomplishment Instructions and Appendix 2, amend text to include reference to Bombardier Service Bulletin RB211-E4-A1003 in 1.A.Effectivity and Appendix 2, add Bombardier Service Bulletin RB211-E4-A1003 in 1.I. Reference. R R R R R C. Description This NMSB instructs the removal of the air intake cowl from the engine and replacement of the air intake cowl forward bulkhead assembly; TAI spray ring and attachment fittings with new in order to maintain serviceability. In order to assist Rolls-Royce and Bombardier Aerospace-Shorts, it is recommended that the operator advise their assigned Rolls-Royce Field Service Office (FSO) and Bombardier Aerospace-Shorts of NMSB accomplishment. To support future analysis, operators are also requested to provide details of the findings, using forms provided in Appendix 1. D. Compliance ALERT This NMSB is anticipated to be the subject of an FAA Airworthiness Directive. (1) For air intake cowls listed in Appendix 2 that are still in-service, carry out the procedure, as defined in 3. Accomplishment Instructions, within the timescales provided in Appendix 2.**Printed in Great Britain**



# RB.211−71−AG698 Page 2 Oct.14/11 R Jun.20/13(2) If the air intake was disassembled during a previous shop visit and it can be shown that repair of the air intake introduced a new complete forward bulkhead assembly as per parts list defined in step (a) or (b) below, subsequent replacement of the complete forward bulkhead assembly can be delayed and performed within 144 months from the date of last replacement. (a) For Pre SB71-9634 standards - RB211-71-AG698-E4KIT fitted or all the parts listed in Appendix 3. (b) For SB71-9634 standards - RB211-71-AG698-E4BKIT fitted or all the parts listed in Appendix 4. This NMSB is applicable to in-shop embodiment. E. Approval This Non-Modification Service Bulletin has been reviewed by the Federal Aviation Administration (FAA) and the FAA finds it acceptable. This NMSB has been approved by the Boeing Commercial Airplane Company. F. Manpower (1) Time to remove nose cowl from engine 6 hours (2) Time to restore nose cowl to serviceable condition 240 hours (3) Time to restore-install nose cowl on engine 6 hours G. Material Price and Availability The parts required to accomplish this Non-Modification Service Bulletin may be procured from operator stock or purchased as single line items as shown in Appendix 3 and 4. Alternatively, the following kits are available obtained by contacting Bombardier at the following addresses: RB211-71-AG698-E4KIT (for Pre SB71-9634 standards) RB211-71-AG698-E4BKIT (for SB71-9634 standards) (1) Bombardier Customer Services Short Brothers PLC PO Box 241**Printed in Great Britain**



# RB.211−71−AG698 Page 3 Oct.14/11 R Jun.20/13Belfast BT3 9DZ Northern Ireland Att: Spares Sales Phone: +44 2890 733700 Fax: +44 2890 733839 E Mail: bfs_spares_sales@aero.bombardier.com (2) Bombardier Customer Services Dallas MRO 4039 Rock Quarry Road, Suite 600 Dallas, Texas TX 75211 U.S.A Phone: 214-331-9400 Fax: 214-331-9401 H. Tooling Price and Availability None I. References (1) RB211-535, LJ30000 Series Nose Cowl Maintenance Data (Component Maintenance Manual, 71-11-30). (2) RB211-535, LJ50000 Series Nose Cowl Maintenance Data (Component Maintenance Manual, 71-11-50). (3) FRS7130 Disassembly/Assembly of Air Intake Cowl (Pre SB 71-9634, Dyna-Rohr standard). TASK 71-11-30-300-819-A01. (4) FRS7131 - Disassembly/Assembly of Air Intake Cowl (SB71-9634, SB 71-D143). TASK 71-11-50-300-813-A01. (5) FRS7132 - Replacement of the Rear Angle, (Pre SB 71-9634) Front Bulkhead. TASK 71-11-30-300-821-A01. (6) FRS7134 - Install and Remove the Front Bulkhead/Spray Ring Assembly (Pre SB 71-9634). TASK 71-11-30-300-823-A01.**Printed in Great Britain**



# RB.211−71−AG698 Page 4 Oct.14/11 R Jun.20/13(7) FRS7136 - Replace the Front Bulkhead Diaphragm (SB 71-9634). TASK 71-11-50-300-815-A01. (8) FRS7137 - Replace the Front Bulkhead Diaphragm (Pre SB 71-9634). TASK 71-11-30-300-824-A01. (9) FRS7145 - Replace Inner and Outer Front Angles, Lipskin Assembly (Pre SB 71-9634). TASK 71-11-30-300-828-A01. (10) FRS7145 - Replace Inner and Outer Front Angles, Lipskin Assembly (SB 71-9634). TASK 71-11-50-300-822-A01. (11) FRS7150 - Replace the Rear Angle (SB 71-9634). TASK 71-11-50-300-826-A01. (12) FRS7152 - Replace Stiffeners and Buttstraps, Front Bulkhead Removed (Pre SB 71-9634). TASK 71-11-30-300-830-A01. (13) FRS7152 - Replace Stiffeners and Buttstraps, Front Bulkhead Removed (SB 71-9634). TASK 71-11-50-300-828-A01. (14) FRS7153 - Remove and Install the Front Bulkhead/Spray Ring Assembly (SB 71-9634). TASK 71-11-50-300-829-A01. (15) FRS7154 - Remove and Replace the Thermal Anti Icing (T.A.I) Spray Ring Assembly (Pre SB 71-9634). TASK 71-11-30-300-831-A01. (16) FRS7154 - Remove and Replace the Thermal Anti Icing (T.A.I) Spray Ring Assembly (SB 71-9634). TASK 71-11-50-300-830-A01. (17) FRS7199 - Disassembly/Assembly of Air Intake Cowl SB 71-9634, Pre SB 71-D143. TASK 71-11-50-300-831-A01. (18) RB211-535 Engine Manual, 71-11-03. (19) RB211-535 Engine Manual, 71-00-31 Remove/Install Inlet Cowl (20) Aircraft Maintenance Manual, 71-11-01- Removal/Installation. (21) Overhaul Materials Manual, OMat. (22) Boeing 757 Non-Destructive Test Manual, Part 1 chapter 51-05. (23) Bombardier Service Bulletin RB211-E4-A1003, latest revision. R**Printed in Great Britain**



# RB.211−71−AG698 Page 5 Oct.14/11 R Jun.20/132. Material Information A. Consumable Materials OMat No. Description Availability OMat 150 Acetone (CH3)2CO Commercially Available (Commercial grade 0-A-51) OMat 2/101 Absorbent Cloth, lint-free Commercially Available OMat 2/114 Gloves, lint-free Commercially Available NOTE: To identify consumable materials, refer to Overhaul Materials Manual. OMat.**Printed in Great Britain**



# RB.211−71−AG698 Page 6 Oct.14/11 R Jun.20/133. Accomplishment Instructions A. Remove the air intake cowl by referring to current overhaul or maintenance procedures (Engine Manual, 71-00-31 - Removal or Aircraft Maintenance Manual, 71-11-01- Removal/Installation). B. Replace the forward bulkhead assembly, TAI spray ring assembly, and attachment fittings. WARNING: KEEP FLAMES AND ELECTRICAL EQUIPMENT THAT IS NOT FLAMEPROOF OUT OF THE REPAIR AREA. MATERIALS USED ARE FLAMMABLE. INJURY MAY OCCUR. WARNING: SOLVENT CLEANERS ARE FLAMMABLE AND THEIR VAPOURS ARE HARMFUL. USE IN A WELL VENTILATED AREA. AVOID PROLONGED BREATHING OF VAPOURS OR PROLONGED OR REPEATED CONTACT WITH SKIN. HIGH CONCENTRATIONS MAY CAUSE IMPAIRED JUDGEMENT. PROTECTIVE GLOVES SHOULD BE WORN DURING USE. SOLVENT MAY CAUSE DERMATITIS BY REMOVING SKIN OILS. PRIOR TO USE OF THIS PRODUCT, READ THE 'MATERIALS SAFETY DATA SHEET' AND FOLLOW ALL LISTED SAFETY AND HEALTH PRECAUTIONS. CAUTION: IN ORDER TO REDUCE THE POTENTIAL FOR MULTIPLE ENGINE IN-FLIGHT SHUT DOWN, POWER LOSS, OR OTHER ANOMALY DUE TO MAINTENANCE ERROR, ROLLS-ROYCE RECOMMENDS THAT OPERATORS AVOID PERFORMING MAINTENANCE ON MULTIPLE ENGINES INSTALLED ON THE SAME AIRCRAFT AT THE SAME TIME. IF IT IS NOT POSSIBLE TO AVOID MAINTENANCE ON MORE THAN ONE ENGINE AT THE SAME TIME, ROLLS-ROYCE RECOMMENDS THAT ADDITIONAL CONTROLS ARE APPLIED IN ORDER TO ENSURE THAT MAINTENANCE TASKS HAVE BEEN COMPLETED AS DEFINED. MAINTENANCE GUIDELINES SHOULD BE REVISED, WERE POSSIBLE, TO PROMOTE THIS RECOMMENDATION. (1) There are three distinct modification standards of air intake cowl configured for the RB211 535E4/E4-B Pre SB 71-D143 / E4B Post SB 71-D143. (a) Pre SB 71-9634 standard intake cowls (Dyna-Rohr standard, part numbers LJ35708, LJ39447, LJ35810, LJ39448, LJ38068, LJ38036 and LJ38066. Nose cowl serial numbers SB/RR/4001 to SB/RR/4484 (b) SB 71-9634, Pre SB 71-D143, standard intake cowls (Bombardier standard, part numbers LJ50501, LJ50675, LJ50678). Nose cowl serial numbers SB/RR/9001 to SB/RR/9663 (unless SB 71-D143 has been incorporated in-service).**Printed in Great Britain**



# RB.211−71−AG698 Page 7 Oct.14/11 R Jun.20/13(c) SB 71-9634, SB 71-D143 standard intake cowls (Bombardier standard, part numbers LJ50678 and LJ50812). Nose cowl serial numbers SB/RR/9664 to SB/RR/9786. R Also any nose cowls listed in step (1)(b) above that has SB 71-D143 incorporated in-service. NOTE : The Dyna-Rohr standard intake cowls have a metal intake barrel with insulation blanket. The Bombardier standard intake cowls have a composite intake barrel with the insulation blanket deleted. (2) Having confirmed the modification standard of the air intake cowl, replace the forward bulkhead assembly, TAI spray ring assembly and associated attachment fittings with new in accordance with the applicable Component Maintenance Manual (CMM) tasks. (a) Pre SB 71-9634 standard intake cowls (Dyna-Rohr standard, part numbers LJ35708, LJ39447, LJ35810, LJ39448, LJ38068, LJ38036 and LJ38066). Nose cowl serial numbers SB/RR/4001 to SB/RR/4484 (i) Disassemble the air intake cowl in accordance with CMM Task 71-11-30-300-819-A01 (FRS7130). Do subtask 71-11-30-99F-034-A01 through to subtask 71-11-30-350-082-A01 only. NOTE: Any parts referred to below that are to be discarded should be stored until repair is complete as in some occasions the old part may need to be used as a reference. (ii) Remove and discard the forward bulkhead and spray ring assembly in accordance with CMM Task 71-11-30-300-823-A01 (FRS7134). (iii) Remove and discard old inner and outer rear angles in accordance with CMM Task 71-11-30-300-821-A01 (FRS7132). (iv) Remove and discard old inner and outer front angles, remove and retain lipskin assembly in accordance with CMM Task 71-11-30-300-828-A01 (FRS7145). (v) Replace the complete forward bulkhead assembly with Kit RB211-71-AG698-E4KIT or replace ALL the component parts with new, per Appendix 3, using the tasks below. Please note the retained parts below which can be reinstalled onto the new front bulkhead diaphragm, only if these parts are in serviceable condition. (1) New front bulkhead diaphragm in accordance with CMM Task 71-11-30-300-824-A01 (FRS7137). A Install retained plate packing, LJ35501 and LJ35499.**Printed in Great Britain**



# RB.211−71−AG698 Page 8 Oct.14/11 R Jun.20/13B Install retained seal, LJ35506. C Install retained plate reinforcing, LJ38074 and LJ35500. D Install the retained sling bracket assemblies, LJ26891. E Install retained cover access plate, LJ38076. (2) New stiffeners and buttstraps (front bulkhead removed) in accordance with CMM Task 71-11-30-300-830-A01 (FRS7152). (vi) Install the new inner and outer front angles, lipskin assembly in accordance with CMM Task 71-11-30-300-828-A01 (FRS7145). (vii) Assemble the new TAI spray ring in accordance with CMM Task 71-11-30-300-831-A01 (FRS7154). (viii) Install the new front bulkhead/spray ring assembly in accordance with CMM Task 71-11-30-300-823-A01 (FRS7134). (ix) Install the new rear angles - front bulkhead in accordance with CMM Task 71-11-30-300-821-A01 (FRS7132). (x) Reassemble the air intake cowl in accordance with CMM Task 71-11-30-300-819-A01 (FRS7130). Do subtask 71-11-30-350-084-A01 through to subtask 71-11-30-220-033-A01 only. (b) SB 71-9634, Pre SB 71-D143, standard intake cowls (part numbers LJ50501, LJ50675 and LJ50678). Nose cowl serial numbers SB/RR/9001 to SB/RR/9663 (unless SB 71-D143 has been incorporated in-service). (i) Disassemble the air intake cowl in accordance with CMM Task 71-11-50-300-831-A01 (FRS7199). Do subtask 71-11-50-99F-090-A01 through to subtask 71-11-50-350-261-A01 only. NOTE: Any parts referred to below that are to be discarded should be stored until repair is complete as in some occasions the old part may need to be used as a reference. (ii) Remove and discard old forward bulkhead and spray ring assembly in accordance with CMM Task 71-11-50-300-829-A01 (FRS7153).**Printed in Great Britain**



# RB.211−71−AG698 Page 9 Oct.14/11 R Jun.20/13(iii) Remove and discard old inner and outer rear angles in accordance with CMM Task 71-11-50-300-826-A01 (FRS7150). (1) If cracking or holing of the front bulkhead diaphragm is found, inspect the backing sheet of all the air intake cowl acoustic panels, for evidence of disbonds, using the tap test procedure. Refer to the Boeing 757 NDT Manual, part 1 chapter 51-05. Visually inspect the backing sheet of all the air intake cowl acoustic panels for evidence of heat discoloration. NOTE: An operator who has found disbonds or heat discoloration in any acoustic panel is asked to contact Bombardier Customer Services Technical Helpline: +44 7850 77 0826, (shorts.support@aero.bombardier.com) for further disposition. (iv) Remove and discard old inner and outer front angles, remove and retain lipskin assembly in accordance with CMM Task 71-11-50-300-822-A01 (FRS7145). (v) Replace the complete forward bulkhead assembly with Kit RB211-71-AG698-E4BKIT or replace ALL the component parts with new, per Appendix 4, using the tasks below. Please note the retained parts below which can be reinstalled onto the new front bulkhead diaphragm, only if these parts are in serviceable condition. (1) New front bulkhead diaphragm in accordance with CMM Task 71-11-50-300-815-A01 (FRS7136). A Install retained plate packing, LJ50629. B Install retained machined doubler, LJ50632. C Install retained seal housing, LJ50631. D Install the retained shroud fitting, LJ50633. E Install retained sling bracket assemblies, LJ26893. F Install retained access cover, LJ38076. (2) New stiffeners and buttstraps (front bulkhead removed) in accordance with CMM Task 71-11-50-300-828-A01 (FRS7152). (vi) Install the new inner and outer front angles, lipskin assembly in accordance with CMM Task 71-11-50-300-822-A01 (FRS7145).**Printed in Great Britain**



# RB.211−71−AG698 Page 10 Oct.14/11 R Jun.20/13(vii) Assemble the new TAI spray ring in accordance with CMM Task 71-11-50-300-830-A01 (FRS7154). (viii) Install the new front bulkhead/spray ring assembly in accordance with CMM Task 71-11-50-300-829-A01 (FRS7153). (ix) Install the new rear angles - front bulkhead in accordance with CMM Task 71-11-50-300-826-A01 (FRS7150). (x) Reassemble the air intake cowl in accordance with CMM Task 71-11-50-300-831-A01 (FRS7199). Do subtask 71-11-50-560-002-A01 through to subtask 71-11-50-220-098-A01 only. (c) SB 71-9634, SB 71-D143, standard intake cowls (part numbers LJ50678 and LJ50812). Nose cowl serial numbers SB/RR/9664 to SB/RR/9786. R Also any nose cowls listed in step (1)(b) above that has SB 71-D143 incorporated in-service. (i) Disassemble the air intake cowl in accordance with CMM Task 71-11-50-300-813-A01 (FRS7131). Do subtask 71-11-50-99F-091-A01 through to subtask 71-11-50-350-274-A01 only. NOTE: Any parts referred to below that are to be discarded should be stored until repair is complete as in some occasions the old part may need to be used as a reference. (ii) Remove and discard old forward bulkhead and spray ring assembly in accordance with CMM Task 71-11-50-300-829-A01 (FRS7153). (iii) Remove and discard old inner and outer rear angles in accordance with CMM Task 71-11-50-300-826-A01 (FRS7150). (1) If cracking or holing of the front bulkhead diaphragm is found, inspect the backing sheet of all the air intake cowl acoustic panels, for evidence of disbonds, using the tap test procedure. Refer to the Boeing 757 NDT Manual, part 1 chapter 51-05. NOTE: An operator who has found disbonds in any acoustic panel is asked to contact Bombardier Customer Services Technical Helpline: +44 7850 77 0826, (shorts.support@aero.bombardier.com) for further disposition. (iv) Remove and discard old inner and outer front angles, remove and retain lipskin assembly in accordance with CMM Task 71-11-50-300-822-A01 (FRS7145).**Printed in Great Britain**



# RB.211−71−AG698 Page 11 Oct.14/11 R Jun.20/13(v) Replace the complete forward bulkhead assembly with Kit RB211-71-AG698-E4BKIT or replace ALL the component parts with new, per Appendix 4, using the tasks below. Please note the retained parts below which can be reinstalled onto the new front bulkhead diaphragm, only if these parts are in serviceable condition. (1) New front bulkhead diaphragm in accordance with CMM Task 71-11-50-300-815-A01 (FRS7136). A Install retained plate packing, LJ50629. B Install retained machined doubler, LJ50632. C Install retained seal housing, LJ50631. D Install the retained shroud fitting, LJ50633. E Install retained sling bracket assemblies, LJ26893. F Install retained access cover, LJ38076. (2) New stiffeners and buttstraps (front bulkhead removed) in accordance with CMM Task 71-11-50-300-828-A01 (FRS7152). (vi) Install the new inner and outer front angles, lipskin assembly in accordance with CMM Task 71-11-50-300-822-A01 (FRS7145). (vii) Assemble the new TAI spray ring in accordance with CMM Task 71-11-50-300-830-A01 (FRS7154). (viii) Install the new front bulkhead/spray ring assembly in accordance with CMM Task 71-11-50-300-829-A01 (FRS7153). (ix) Install the new rear angles - front bulkhead in accordance with CMM Task 71-11-50-300-826-A01 (FRS7150). (x) Re-assemble the air intake cowl in accordance with CMM Task 71-11-50-300-813-A01 (FRS7131). Do subtask 71-11-50-560-004-A01 through to subtask 71-11-50-220-100-A01 only. C. Install the air intake cowl by referring to current overhaul or maintenance procedures (Engine Manual, 71-00-31 Installation or Aircraft Maintenance Manual 71-11-01, Removal/Installation.)**Printed in Great Britain**



# RB.211−71−AG698 Page 12 Oct.14/11 R Jun.20/13D. A record of accomplishment is required. (1) Record accomplishment of this Non-Modification Service Bulletin by referring to local Service Bulletin tracking system procedures and metal stamp, vibro etch or electro etch on the air intake cowl modification plate that Non-Modification Service Bulletin RB211-71-AG698 has been done.**Printed in Great Britain**



# RB.211−71−AG698 Page 13 Oct.14/11 R Jun.20/13Air Intake Cowl Forward Bulkhead Assembly Fig.1**Printed in Great Britain**



# RB.211−71−AG698 Page 14 Oct.14/11 R Jun.20/13Air Intake Cowl Forward Bulkhead Web and TAI Spray Ring Assembly Fig.2 (sheet 1 of 2)**Printed in Great Britain**



# RB.211−71−AG698 Page 15 Oct.14/11 R Jun.20/13TAI Spray Ring Assembly, Attaching Parts Fig.2 (sheet 2 of 2)**Printed in Great Britain**



# RB.211−71−AG698 Page 16 Oct.14/11 R Jun.20/13Damage Record Sheets Record accomplishment of this Non-Modification Service Bulletin by referring to local Service Bulletin tracking system procedures. Advise Bombardier Aerospace-Shorts and your assigned Rolls-Royce FSO of NMSB accomplishment and results regardless of findings. Damage record sheets can be found in Appendix 1. Return the inspection record for Bombardier Aerospace-Shorts to the address that follows: FAO In-service Engineering Customer Services Bombardier Aerospace PO Box 241 Belfast BT3 9DZ Northern Ireland Phone: +44 2890 733546 Fax: +44 2890 733253 Email: shorts.support@aero.bombardier.com Also, please send a copy of the information to your assigned Rolls-Royce Field Service Office (FSO). APPENDIX 1**Printed in Great Britain**



# RB.211−71−AG698 Appendix 1 - Page 1 of 7 Oct.14/11 R Jun.20/13Damage Record Sheet**Printed in Great Britain**



# RB.211−71−AG698 Appendix 1 - Page 2 Oct.14/11 R Jun.20/13Damage Record Sheet - Write the damage observed on forward bulkhead, stiffeners, butt straps and bulkhead web Fig.1 (sheet 1 of 5)**Printed in Great Britain**



# RB.211−71−AG698 Appendix 1 - Page 3 Oct.14/11 R Jun.20/13Damage Record Sheet - Write the damage observed on bulkhead web Fig.1 (sheet 2 of 5)**Printed in Great Britain**



# RB.211−71−AG698 Appendix 1 - Page 4 Oct.14/11 R Jun.20/13Damage Record Sheet - Write the damage observed on forward inner and outer attachment angles Fig.1 (sheet 3 of 5)**Printed in Great Britain**



# RB.211−71−AG698 Appendix 1 - Page 5 Oct.14/11 R Jun.20/13Damage Record Sheet - Write the damage observed on rear inner and outer attachment angles Fig.1 (sheet 4 of 5)**Printed in Great Britain**



# RB.211−71−AG698 Appendix 1 - Page 6 Oct.14/11 R Jun.20/13Damage Record Sheet - Write the damage observed on links at spray ring and bulkhead Fig.1 (sheet 5 of 5)**Printed in Great Britain**



# RB.211−71−AG698 Appendix 1 - Page 7 Oct.14/11 R Jun.20/13The air intake cowls listed below are subject to replacement of the forward bulkhead, TAI spray ring assembly and attachment fittings in accordance with this NMSB within the timescales provided. Air Intake Cowl Serial Numbers NMSB Implementation Timescale 4001 to 4121 Within 12 months of NMSB issue date, and within every 144 months thereafter. 4122 to 4241 Within 24 months of NMSB issue date, and within every 144 months thereafter. 4242 to 4361 Within 36 months of NMSB issue date, and within every 144 months thereafter. 4362 to 4481 Within 48 months of NMSB issue date, and within every 144 months thereafter. 4482 to 4484 and 9001 to 9117 Within 60 months of NMSB issue date, and within every 144 months thereafter. 9118 to 9237 Within 72 months of NMSB issue date, and within every 144 months thereafter. 9238 to 9357 Within 84 months of NMSB issue date, and within every 144 months thereafter. 9358 to 9477 Within 96 months of NMSB issue date, and within every 144 months thereafter. 9478 to 9597 Within 108 months of NMSB issue date, and within every 144 months thereafter. 9598 to 9717 Within 120 months of NMSB issue date, and within every 144 months thereafter. 9718 to 9786 R Within 132 months of NMSB issue date, and within every 144 months thereafter. APPENDIX 2**Printed in Great Britain**



# RB.211−71−AG698 Appendix 2 - Page 1 of 2 Oct.14/11 R Jun.20/13NOTE: Excluding air intake cowls that have been modified by a Supplementary type certificate, identified by the following marking adjacent to the modification plate on the rear bulkhead. Refer to Bombardier Service Bulletin RB211-E4-A1003, latest revision, for instructions relating to these air intake cowls. R R R Bombardier Aerospace STC - CAA.21NE2.00023 FAA - ST02102NY TCCA - SSA05-25**Printed in Great Britain**



# RB.211−71−AG698 Appendix 2 - Page 2 Oct.14/11 R Jun.20/13Pre SB 71-9634 (Dyna-Rohr Standard)

Part No. Description Qty LJ12671 Sleeve 12 LJ17145 Bolt-Special 12 LJ20012 Main Link Assy 6 LJ20252 Spacer 8 LJ20256 Inter Link Assy 4 LJ21739 Trap Washer 10 LJ21874 Bolt 11 LJ21875 Bolt 1 LJ21876 Bolt D-Head 8 LJ22350 Bracket Main Support 6 LJ22353 Bracket Inter Support 4 LJ27101 Bolt 4 LJ33601 Plate Retaining 2 LJ33602 Plate Retaining 2 LJ33698 Plate Packing 4 APPENDIX 3**Printed in Great Britain**



# RB.211−71−AG698 Appendix 3 - Page 1 of 6 Oct.14/11 R Jun.20/13Part No. Description Qty LJ33699 Plate Packing 4 LJ33943 Plate Packing 2 LJ35310 Half Ring (B Way) 2 LJ35361 TAI Ring Assy 1 LJ35431 Diaphragm, Segment 1 LJ35432 Diaphragm, Upper RH 1 LJ35433 Diaphragm, Lower LH 1 LJ35434 Diaphragm, Lower RH 1 LJ35435 Rib Stiffener 2 LJ35436 Stiffener Top Hat 1 LJ35437 Rib Stiffener 2 LJ35439 Rib Stiffener 4 LJ35440 Rib Stiffener 1 LJ35441 Rib Stiffener 1 LJ35442 Rib Stiffener 1 LJ35444 Rib Stiffener 1**Printed in Great Britain**



# RB.211−71−AG698 Appendix 3 - Page 2 Oct.14/11 R Jun.20/13Part No. Description Qty LJ35445 Rib Stiffener 2 LJ35446 Rib Stiffener 2 LJ35447 Rib Stiffener 4 LJ35448 Rib Stiffener 3 LJ35450 Rib Stiffener 1 LJ35451 Rib Stiffener 2 LJ35452 Rib Stiffener 1 LJ35453 Rib Stiffener 1 LJ35454 Stiffener Top Hat 2 LJ35455 Rib Stiffener 1 LJ35456 Stiffener Rib 1 LJ35457 Stiffener Top Hat 1 LJ35459 Rib Stiffener 1 LJ35460 Rib Stiffener 1 LJ35462 Rib Stiffener 1 LJ35465 Rib Stiffener 1**Printed in Great Britain**



# RB.211−71−AG698 Appendix 3 - Page 3 Oct.14/11 R Jun.20/13Part No. Description Qty LJ35466 Stiffener Top Hat 1 LJ35467 Rib Stiffener 1 LJ35468 Rib Stiffener 1 LJ35469 Rib Stiffener 1 LJ35470 Rib Stiffener 1 LJ35488 Buttstrap 1 LJ35489 Buttstrap 1 LJ35490 Plate 2 LJ35491 Buttstrap 1 LJ35492 Joint Plate 1 LJ35493 Buttstrap 2 LJ35499 Plate Packing 1 LJ35500 Reinforcing Plate 1 LJ35501 Plate Packing 1 LJ35506 Bulkhead Seal 1 LJ38074 Reinforcing Plate 1**Printed in Great Britain**



# RB.211−71−AG698 Appendix 3 - Page 4 Oct.14/11 R Jun.20/13Part No. Description Qty LJ38075 Rib Stiffener 1 LJ33637 Packer 2 LJ35471 Angle 1 LJ35472 Angle Joint 1 LJ35473 Angle Joint 1 LJ35474 Joint Angle 1 LJ35475 Attachment Angle Rear 1 LJ35476 Angle Outer Rear 1 LJ35477 Angle ATT FWD Outer 1 LJ35478 Angle Attachment FWD Outer 1 LJ35479 Angle 2 LJ35480 Inner Joint Angle 2 LJ35482 Angle Inner Rear 1 LJ35483 Angle Inner Rear 1 LJ35484 Joint Angle FWD Inner 1 LJ35485 Joint Angle FWD Inner 1**Printed in Great Britain**



# RB.211−71−AG698 Appendix 3 - Page 5 Oct.14/11 R Jun.20/13Part No. Description Qty LJ35502 Packer 1 LJ35503 Packer 1 LJ35504 Shim 1 LJ35505 Shim 1**Printed in Great Britain**



# RB.211−71−AG698 Appendix 3 - Page 6 Oct.14/11 R Jun.20/13SB 71-9634 (Bombardier Standard)

Part No. Description Qty LJ12671 Sleeve 12 LJ17145 Bolt-Special 8 LJ20012 Main Link Assy 6 LJ20252 Spacer 8 LJ20256 Inter Link Assy 4 LJ21739 Trap Washer 10 LJ21874 Bolt 11 LJ21875 Bolt 1 LJ21876 Bolt D-Head 8 LJ22350 Bracket Main Support 6 LJ22353 Bracket Inter Support 4 LJ27101 Bolt 4 LJ33601 Plate Retaining 2 LJ33602 Plate Retaining 2 LJ33698 Plate Packing 4 APPENDIX 4**Printed in Great Britain**



# RB.211−71−AG698 Appendix 4 - Page 1 of 5 Oct.14/11 R Jun.20/13Part No. Description Qty LJ33699 Plate Packing 4 LJ35310 Half Ring (B Way) 2 LJ35432 Diaphragm, Upper RH 1 LJ35433 Diaphragm, Lower LH 1 LJ35434 Diaphragm, Lower RH 1 LJ35435 Rib Stiffener 2 LJ35436 Stiffener Top Hat 1 LJ35437 Rib Stiffener 2 LJ35439 Rib Stiffener 4 LJ35440 Rib Stiffener 1 LJ35441 Rib Stiffener 1 LJ35442 Rib Stiffener 1 LJ35444 Rib Stiffener 1 LJ35445 Rib Stiffener 2 LJ35446 Rib Stiffener 2 LJ35447 Rib Stiffener 4**Printed in Great Britain**



# RB.211−71−AG698 Appendix 4 - Page 2 Oct.14/11 R Jun.20/13Part No. Description Qty LJ35448 Rib Stiffener 3 LJ35450 Rib Stiffener 1 LJ35451 Rib Stiffener 2 LJ35452 Rib Stiffener 1 LJ35453 Rib Stiffener 1 LJ35454 Stiffener Top Hat 2 LJ35455 Rib Stiffener 1 LJ35456 Stiffener Rib 1 LJ35457 Stiffener Top Hat 1 LJ35459 Rib Stiffener 1 LJ35460 Rib Stiffener 1 LJ35462 Rib Stiffener 1 LJ35465 Rib Stiffener 1 LJ35466 Stiffener Top Hat 1 LJ35467 Rib Stiffener 1 LJ35468 Rib Stiffener 1**Printed in Great Britain**



# RB.211−71−AG698 Appendix 4 - Page 3 Oct.14/11 R Jun.20/13Part No. Description Qty LJ35469 Rib Stiffener 1 LJ35470 Rib Stiffener 1 LJ35488 Buttstrap 1 LJ35489 Buttstrap 1 LJ35490 Plate 2 LJ35491 Buttstrap 1 LJ35492 Joint Plate 1 LJ35493 Buttstrap 2 LJ50523 Stiffener Rib 1 LJ50545 Spray Ring 1 LJ50660 Plate, Packing 4 LJ50636 Diaphragm Segment 1 LJ33637 Packer 2 LJ35473 Angle Joint 1 LJ35474 Joint Angle 1 LJ35477 Angle Attachment FWD Outer 1**Printed in Great Britain**



# RB.211−71−AG698 Appendix 4 - Page 4 Oct.14/11 R Jun.20/13Part No. Description Qty LJ35478 Angle Attachment FWD Outer 1 LJ35480 Inner Joint Angle 2 LJ35484 Angle FWD Inner 1 LJ35485 Angle FWD Inner 1 LJ50537 Angle Joint Rear Inner 1 LJ35471 Angle 1 LJ35472 Angle Joint 1 LJ50538 Angle Joint Rear Inner 1 LJ35476 Angle Outer Rear 1 LJ50536 Angle ATT Rear Inner 1 LJ50627 Angle Outer Rear 1 LJ50535 Angle Inner Rear 1**Printed in Great Britain**



# RB.211−71−AG698 Appendix 4 - Page 5 Oct.14/11 R Jun.20/13