Original Issue Date: May 27/14

Revision 1: Apr 14/15

ERPS06M-29-21

Page 1 of 28

SERVICE BULLETIN

Hamilton Sundstrand Corporation, a UTC Aerospace Systems Company

EMERGENCY HYDRAULIC POWER - RAM AIR TURBINE MODULE - 

CHECK/REPLACE ACTUATOR

© 2014, 2015 Hamilton Sundstrand Corporation

PROPRIETARY

THIS DOCUMENT IS THE PROPERTY OF UTC AEROSPACE SYSTEMS. YOU MAY NOT POSSESS, USE, COPY OR DISCLOSE THIS 

DOCUMENT OR ANY INFORMATION IN IT, FOR ANY PURPOSE, INCLUDING WITHOUT LIMITATION, TO DESIGN, MANUFACTURE 

OR REPAIR PARTS, OR OBTAIN ANY GOVERNMENT APPROVAL TO DO SO, WITHOUT UTC AEROSPACE SYSTEMS’S EXPRESS 

WRITTEN PERMISSION. NEITHER RECEIPT NOR POSSESSION OF THIS DOCUMENT ALONE, FROM ANY SOURCE, 

CONSTITUTES SUCH PERMISSION. POSSESSION, USE, COPYING OR DISCLOSURE BY ANYONE WITHOUT UTC AEROSPACE 

SYSTEMS’S EXPRESS WRITTEN PERMISSION IS NOT AUTHORIZED AND MAY RESULT IN CRIMINAL AND/OR CIVIL LIABILITY. 

INFORMATION SUBJECT TO EXPORT CONTROL LAWS

WARNING – This information is subject to the export control laws of the United States, specifically the Export Administration Act and the 

Export Administration Regulations (EAR), 15 C.F.R. parts 730-774, diversion contrary to U.S. law is prohibited. The export, re-export, 

transfer or re-transfer of this technical data/technology to any other company, entity, person, or destination, or for any use or purpose other 

than that for which the technical data was originally provided is prohibited without prior written approval and authorization under applicable 

export control laws. 

EAR Export Classification: ECCN EAR99

THE DATA IN THIS DOCUMENT WERE DEVELOPED ONLY TO MAINTAIN SYSTEMS AND/OR PARTS MANUFACTURED BY OR FOR 

HAMILTON SUNDSTRAND OR APPROVED BY HAMILTON SUNDSTRAND. THE DATA MAY NOT BE APPLICABLE TO ANY OTHER 

SYSTEMS AND/OR PARTS, REGARDLESS OF THEIR APPARENT SIMILARITY TO SYSTEMS AND/OR PARTS MANUFACTURED BY 

OR FOR HAMILTON SUNDSTRAND OR APPROVED BY HAMILTON SUNDSTRAND. DO NOT RELY IN ANY WAY ON DATA IN THIS 

DOCUMENT TO MAINTAIN OR OTHERWISE SUPPORT SYSTEMS AND/OR PARTS THAT WERE NOT MANUFACTURED BY OR FOR 

HAMILTON SUNDSTRAND OR APPROVED BY HAMILTON SUNDSTRAND WITHOUT EVIDENCE THAT THE FEDERAL AVIATION 

ADMINISTRATION OR OTHER REGULATORY AGENCY HAS DETERMINED THAT THE DATA IN THIS DOCUMENT IS VALID FOR 

SUCH USE.

HAMILTON SUNDSTRAND ASSUMES NO LIABILITY WHATSOEVER, WHETHER CONTRACTUAL, WARRANTY, TORT OR 

OTHERWISE, FOR UNAUTHORIZED ALTERATION OR ALTERATIONS NOT PERFORMED IN ACCORDANCE WITH HAMILTON 

SUNDSTRAND APPROVED PROCEDURES.

REVISIONS

Revision 1

This revision updates the identification procedure for actuators that are in the shop and deletes most 

references to Arkwin part numbers. It adds a list of actuators on which a permanent nameplate 

showing the Arkwin part number was installed under the service bulletin basic issue. It adds alternate 

part numbers for the temporary actuator nameplates.

The intent of the following Hamilton Sundstrand Technical Communication System (TCS) message 

has been incorporated in this revision: 

- TCS Message Number IH-141023-111752.

Units previously modified according to this bulletin do not require remodification according to this 

bulletin revision.
Original Issue Date: May 27/14

Revision 1: Apr 14/15

ERPS06M-29-21

Page 2

SERVICE BULLETIN

Hamilton Sundstrand Corporation, a UTC Aerospace Systems Company

UTC AEROSPACE SYSTEMS PROPRIETARY - Subject to the restriction on the title or cover page.

Subject to the EAR and restrictions on cover (or title) page: ECCN: EAR99

This bulletin has been reproduced in its entirety. Discard the bulletin you now have and replace it with 

this copy. The tabulation below is provided for record keeping and traceability of bulletin issues. 

1. PLANNING INFORMATION

A. Effectivity

(1) The Hamilton Sundstrand Ram Air Turbine (RAT) Modules, Model ERPS06M, all serial 

numbers, that are listed in Table 1 of this bulletin. 

Table 1

(2) The RAT actuators that follow: 

(a) The actuator (PN 5913233 or PN 5913234), from the supplier Liebherr, is not 

affected by the deployment solenoid stroke issue. However, when the existing 

Liebherr actuator must be replaced and no replacement Liebherr actuator is 

available, it must be replaced with a new actuator (PN 5917109-1, PN 5917109-2, 

or PN 1720399).

(b) For an actuator PN 5915768, with a serial number that is not listed in Table 2 of 

this bulletin, the actuator should be removed from service, modified, and then 

identified as part number 5917109-2.

(c) All actuators, PN 5912958, from the Supplier Arkwin, installed on RAT modules 

or stocked as spares, rotables, or repair parts are affected. These actuators 

should be removed from service, modified, and then identified as part number 

5917109-2.

(d) All actuators PN 5915768, from the Supplier Arkwin, installed on RAT modules or 

stocked as spares, rotables, or repair parts that are listed in Table 2 of this bulletin 

are affected. (Refer to Table 2 of this bulletin for disposition.)

Issue Date

Basic May 27/14

Revision 1 Apr 14/15

Table 1

RAT Module Part Number Effectivity 

766351 770379A 770952D 1702934C

766351A 770952 770952E 1702934D

768084 770952A 1702934

768084A 770952B 1702934A

770379 770952C 1702934B
Original Issue Date: May 27/14

Revision 1: Apr 14/15

ERPS06M-29-21

Page 3

SERVICE BULLETIN

Hamilton Sundstrand Corporation, a UTC Aerospace Systems Company

UTC AEROSPACE SYSTEMS PROPRIETARY - Subject to the restriction on the title or cover page.

Subject to the EAR and restrictions on cover (or title) page: ECCN: EAR99

(e) If the actuator nameplate is missing, the actuator should be removed from service 

and returned to Liebherr Aerospace (CAGE Code VD9893) (for a Liebherr 

actuator) or to SR Technics (CAGE Code SB968) (for an Arkwin actuator) (refer 

to Figure 1 of this bulletin to identify the actuator). 

1 Liebherr Aerospace should modify (if necessary) a Liebherr actuator (with a 

missing nameplate) and then identify it as part number 5913233 or 5913234.

2 SR Technics should modify (if necessary) an Arkwin actuator (with a missing 

nameplate) and then identify it as part number 5917109-2.

Table 2

Table 2

Serial Numbers of Actuators (PN 5915768) from the Supplier Arkwin 

Serial Numbers Description Disposition

New 

Part Number

00003 - 00015 Correctly shimmed (Note 1) Identify 5917109-1

01500 - 01547 Correctly shimmed (Note 1) Identify 5917109-1

01548 Incorrectly shimmed (Note 2) Remove from service, 

modify, and identify

5917109-2

01549 - 01610 Correctly shimmed (Note 1) Identify 5917109-1

01611 Incorrectly shimmed (Note 2) Remove from service, 

modify, and identify

5917109-2

01612 - 01696 Correctly shimmed (Note 1) Identify 5917109-1

01697 Incorrectly shimmed (Note 2) Remove from service, 

modify, and identify

5917109-2

01698 - 01760 Correctly shimmed (Note 1) Identify 5917109-1

01761 Incorrectly shimmed (Note 2) Remove from service, 

modify, and identify

5917109-2

01762 - 01973 Correctly shimmed (Note 1) Identify 5917109-1

01974 Incorrectly shimmed (Note 2) Remove from service, 

modify, and identify

5917109-2

01975 - 01986 Correctly shimmed (Note 1) Identify 5917109-1

01987 Incorrectly shimmed (Note 2) Remove from service, 

modify, and identify

5917109-2

01988 - 01993 Correctly shimmed (Note 1) Identify 5917109-1
Original Issue Date: May 27/14

Revision 1: Apr 14/15

ERPS06M-29-21

Page 4

SERVICE BULLETIN

Hamilton Sundstrand Corporation, a UTC Aerospace Systems Company

UTC AEROSPACE SYSTEMS PROPRIETARY - Subject to the restriction on the title or cover page.

Subject to the EAR and restrictions on cover (or title) page: ECCN: EAR99

01994 Incorrectly shimmed (Note 2) Remove from service, 

modify, and identify

5917109-2

01995 - 01997 Correctly shimmed (Note 1) Identify 5917109-1

01998 Incorrectly shimmed (Note 2) Remove from service, 

modify, and identify

5917109-2

01999 - 02010 Correctly shimmed (Note 1) Identify 5917109-1

02011 - 02012 Incorrectly shimmed (Note 2) Remove from service, 

modify, and identify

5917109-2

02013 Correctly shimmed (Note 1) Identify 5917109-1

02014 - 02016 Incorrectly shimmed (Note 2) Remove from service, 

modify, and identify

5917109-2

02017 Correctly shimmed (Note 1) Identify 5917109-1

02018 Incorrectly shimmed (Note 2) Remove from service, 

modify, and identify

5917109-2

02019 Correctly shimmed (Note 1) Identify 5917109-1

02020 - 02036 Incorrectly shimmed (Note 2) Remove from service, 

modify, and identify

5917109-2

02037 Correctly shimmed (Note 1) Identify 5917109-1

02038 - 02046 Incorrectly shimmed (Note 2) Remove from service, 

modify, and identify

5917109-2

02047 Correctly shimmed (Note 1) Identify 5917109-1

02048 - 02055 Incorrectly shimmed (Note 2) Remove from service, 

modify, and identify

5917109-2

02056 Correctly shimmed (Note 1) Identify 5917109-1

02057 - 02058 Incorrectly shimmed (Note 2) Remove from service, 

modify, and identify

5917109-2

02059 Correctly shimmed (Note 1) Identify 5917109-1

02060 - 02070 Incorrectly shimmed (Note 2) Remove from service, 

modify, and identify

5917109-2

02071 Correctly shimmed (Note 1) Identify 5917109-1

Table 2

Serial Numbers of Actuators (PN 5915768) from the Supplier Arkwin (Continued)

Serial Numbers Description Disposition

New 

Part Number
Original Issue Date: May 27/14

Revision 1: Apr 14/15

ERPS06M-29-21

Page 5

SERVICE BULLETIN

Hamilton Sundstrand Corporation, a UTC Aerospace Systems Company

UTC AEROSPACE SYSTEMS PROPRIETARY - Subject to the restriction on the title or cover page.

Subject to the EAR and restrictions on cover (or title) page: ECCN: EAR99

02072 Incorrectly shimmed (Note 2) Remove from service, 

modify, and identify

5917109-2

02073 Correctly shimmed (Note 1) Identify 5917109-1

02074 - 02080 Incorrectly shimmed (Note 2) Remove from service, 

modify, and identify

5917109-2

02080R Incorrectly shimmed (Note 2) Remove from service, 

modify, and identify

5917109-2

02081 Incorrectly shimmed (Note 2) Remove from service, 

modify, and identify

5917109-2

02082 Correctly shimmed (Note 1) Identify 5917109-1

02083 - 02097 Incorrectly shimmed (Note 2) Remove from service, 

modify, and identify

5917109-2

02098 Correctly shimmed (Note 1) Identify 5917109-1

02099 - 02100 Incorrectly shimmed (Note 2) Remove from service, 

modify, and identify

5917109-2

02101 Correctly shimmed (Note 1) Identify 5917109-1

02102 - 02108 Incorrectly shimmed (Note 2) Remove from service, 

modify, and identify

5917109-2

02109 Correctly shimmed (Note 1) Identify 5917109-1

02110 - 02162 Incorrectly shimmed (Note 2) Remove from service, 

modify, and identify

5917109-2

02163 Correctly shimmed (Note 1) Identify 5917109-1

02164 - 02315 Incorrectly shimmed (Note 2) Remove from service, 

modify, and identify

5917109-2

02316 Correctly shimmed (Note 1) Identify 5917109-1

02317 - 02330 Incorrectly shimmed (Note 2) Remove from service, 

modify, and identify

5917109-2

02331 Correctly shimmed (Note 1) Identify 5917109-1

02332 - 02362 Incorrectly shimmed (Note 2) Remove from service, 

modify, and identify

5917109-2

Table 2

Serial Numbers of Actuators (PN 5915768) from the Supplier Arkwin (Continued)

Serial Numbers Description Disposition

New 

Part Number
Original Issue Date: May 27/14

Revision 1: Apr 14/15

ERPS06M-29-21

Page 6

SERVICE BULLETIN

Hamilton Sundstrand Corporation, a UTC Aerospace Systems Company

UTC AEROSPACE SYSTEMS PROPRIETARY - Subject to the restriction on the title or cover page.

Subject to the EAR and restrictions on cover (or title) page: ECCN: EAR99

Table 2 Note 1: The noted actuators were modified (retrofitted) according to the instructions in 

Hamilton Sundstrand Service Bulletin ERPS06M-29-18 and are correctly 

shimmed. These actuators have the intent of this bulletin incorporated. These 

retrofitted actuators may remain on the aircraft, but should be identified as part 

number 5917109-1. (Refer to paragraph 3.F. of this bulletin for identification 

instructions.)

Table 2 Note 2: The noted actuators are not correctly shimmed. These actuators should be 

removed from service, modified, and then identified as part number 5917109-2. 

(Refer to paragraph 3.E. of this bulletin for modification instructions.)

Table 2 Note 3: The noted actuators (that were manufactured by Arkwin) are correctly shimmed. 

These actuators have the intent of this bulletin incorporated. These production 

actuators may remain on the aircraft, but should be identified as part number 

5917109-2. (Refer to paragraph 3.F. of this bulletin for identification instructions.)

B. Concurrent Requirements

(1) For the RAT module part numbers listed in Table 3 of this bulletin, which contain one 

of the actuators listed below, Hamilton Sundstrand Service Bulletin ERPS06M-29-18 

(Modify Actuator) must be done prior to, or in conjunction with, this bulletin.

- an actuator with a serial number that is not listed in Table 2 of this bulletin

- an actuator with a missing nameplate 

- an actuator PN 5912958 

02363 Correctly shimmed (Note 1) Identify 5917109-1

02364 - 02408 Incorrectly shimmed (Note 2) Remove from service, 

modify, and identify

5917109-2

02409 and 

subsequent

Correctly shimmed (Note 3) Identify 5917109-2

Serial number is 

not listed above

Unknown Remove from service, 

modify, and identify

5917109-2

Actuator 

nameplate is 

missing

Unknown Remove from service, 

modify, and identify

5917109-2

Table 2

Serial Numbers of Actuators (PN 5915768) from the Supplier Arkwin (Continued)

Serial Numbers Description Disposition

New 

Part Number
Original Issue Date: May 27/14

Revision 1: Apr 14/15

ERPS06M-29-21

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SERVICE BULLETIN

Hamilton Sundstrand Corporation, a UTC Aerospace Systems Company

UTC AEROSPACE SYSTEMS PROPRIETARY - Subject to the restriction on the title or cover page.

Subject to the EAR and restrictions on cover (or title) page: ECCN: EAR99

Table 3

NOTE: If the actuator serial number is 01956 and prior, the deploy solenoid must be 

replaced. 

NOTE: If the actuator serial number is 01957 and subsequent, the deploy solenoid 

may be modified (refer to Appendix A in Hamilton Sundstrand/Arkwin 

Industries CMM 29-21-07).

(2) For the RAT module part numbers listed in Table 4 of this bulletin, Hamilton 

Sundstrand Service Bulletin ERPS06M-29-19 (Check/Replace Pump) must be done 

prior to, or in conjunction with, this bulletin.

Table 4

C. Reason

(1) The Arkwin actuator, installed on the A330/A340 RAT, was found to potentially have 

an insufficient deployment solenoid stroke margin necessary to release the uplock 

mechanism and deploy the RAT. An investigation, conducted by Hamilton Sundstrand 

and Arkwin Industries, determined that the RAT non-deployment was a result of 

insufficient margin of deployment solenoid stroke. A previous modification (to address 

the stroke margin) was found to be inadequate in a specific group of the actuators. It 

created factors that can result in situations in which the solenoid stroke margin is 

eliminated, and failure to deploy can occur. Modification of an affected actuator (to 

shim the solenoid) will provide improved reliability of the RAT module. 

(2) If an existing Liebherr actuator (PN 5913233 or PN 5913234) must be replaced and no 

replacement Liebherr actuator is available, incorporation of this bulletin (to replace the 

actuator) is necessary. 

Table 3

RAT Module Part Numbers with a Concurrent Requirement (ERPS06M-29-18) 

758546 764239 770952 1702934

759123 766351 770952A 1702934A

762956 768084 770952B

762973 770379

Table 4

RAT Module Part Numbers with a Concurrent Requirement (ERPS06M-29-19) 

766351 770952B

768084 1702934

770379 1702934A

770952 1702934B

770952A
Original Issue Date: May 27/14

Revision 1: Apr 14/15

ERPS06M-29-21

Page 8

SERVICE BULLETIN

Hamilton Sundstrand Corporation, a UTC Aerospace Systems Company

UTC AEROSPACE SYSTEMS PROPRIETARY - Subject to the restriction on the title or cover page.

Subject to the EAR and restrictions on cover (or title) page: ECCN: EAR99

(3) This service bulletin introduces the new Hamilton Sundstrand RAT module part 

numbers listed in Table 5 of this bulletin. This service bulletin also introduces three new 

actuator part numbers: Hamilton Sundstrand PN 5917109-1, PN 5917109-2, and 

PN 1720399. 

Table 5

D. Description

(1) This bulletin gives instructions to do one of the following, depending on the part number 

and the serial number of the actuator:

(a) Remove the actuator, modify the actuator, identify the actuator, install the 

actuator, identify the RAT module, and test the RAT module. 

(b) Identify the actuator and the RAT module (if the intent of this bulletin has 

previously been incorporated). 

E. Compliance

(1) Incorporation of this service bulletin is mandatory and is to be accomplished at the 

earliest opportunity. 

F. Approval

(1) The technical content of this document is approved under the authority of DOA 

No. EASA.21J.031.

G. Manpower

(1) Depending on the part number and serial number of the actuator, the manpower 

requirement is one of the following:

(a) Approximately 14.0 man-hours will be required to remove the actuator, identify 

the actuator (if required), install the actuator, identify the RAT module, and test 

the RAT module. 

(b) Approximately 1.0 man-hour will be required to only identify the actuator and the 

RAT module. An additional maximum of 12.5 man-hours may be required if the 

unit is installed on the aircraft and must be removed to view the actuator serial 

number.

Table 5

New Hamilton Sundstrand Part Number RAT Modules 

766351B

768084B

770379B

770952F

1702934E
Original Issue Date: May 27/14

Revision 1: Apr 14/15

ERPS06M-29-21

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SERVICE BULLETIN

Hamilton Sundstrand Corporation, a UTC Aerospace Systems Company

UTC AEROSPACE SYSTEMS PROPRIETARY - Subject to the restriction on the title or cover page.

Subject to the EAR and restrictions on cover (or title) page: ECCN: EAR99

(c) For a RAT module with an actuator (PN 5913233 or PN 5913234) from the 

supplier Liebherr, approximately 1.0 man-hour will be required to identify the RAT. 

H. Weight and Balance

(1) None

I. Electrical Load Data

(1) Not changed

J. Software Accomplishment Summary

(1) Not Applicable

K. References

(1) Hamilton Sundstrand Component Maintenance Manual (CMM) 29-21-31

(2) Hamilton Sundstrand/Arkwin Industries CMM 29-21-07

(3) Hamilton Sundstrand Standard Practices Manual (SPM) 20-00-00

(4) Applicable Airbus Aircraft Maintenance Manual (AMM)

(5) Hamilton Sundstrand Engineering Changes 13E535, 14A812, 14B775, 14F036, and 

15B139

(6) Equipment Definition Evolution Sheets (EDES) A334RAT05-005 and A334RAT05-006

(7) This service bulletin is subject to aircraft modification No. 204067 D50787 (classified 

major) and is covered by aircraft Service Bulletin No. A330-29-3126, A340-29-4097.

(8) Under no circumstances shall the modified equipment, resulting from the application of 

this service bulletin, be installed on the aircraft type unless its aircraft service bulletin 

is approved.

L. Other Publications Affected

(1) Hamilton Sundstrand CMM 29-21-31 will be revised to incorporate this bulletin.

(2) Hamilton Sundstrand/Arkwin Industries CMM 29-21-07 will be revised to incorporate 

this bulletin. 

M. Interchangeability or Intermixability of Parts

(1) Refer to aircraft Service Bulletin No. A330-29-3126 and A340-29-4097.
Original Issue Date: May 27/14

Revision 1: Apr 14/15

ERPS06M-29-21

Page 10

SERVICE BULLETIN

Hamilton Sundstrand Corporation, a UTC Aerospace Systems Company

UTC AEROSPACE SYSTEMS PROPRIETARY - Subject to the restriction on the title or cover page.

Subject to the EAR and restrictions on cover (or title) page: ECCN: EAR99

2. MATERIAL INFORMATION

A. Material - Price and Availability

(1) SR Technics or Hamilton Sundstrand will incorporate this modification into returned 

actuators, PN 5912958 or PN 5915768, at no charge to the operator. 

(2) For SR Technics, operators should place a single “no-charge” order to SR Technics 

(Attention: Peter Kelly) for their fleet requirements, noting the service bulletin number, 

serial numbers of affected units, total quantity of parts, and anticipated incorporation 

schedule.

SR Technics will have a limited number of actuators in a rotable pool for operator use. 

These will be available to operators on a no-charge loan basis (if required), based upon 

availability. Operators should contact SR Technics as follows for scheduling 

information. 

Point of Contact: 

(3) It is highly recommended that the unit be shipped to SR Technics in an approved 

shipping container (part number 1211575) to minimize the risks of shipping damage. 

Contact SR Technics for the shipping container (if required). It is acceptable to re-use 

a shipping container that was delivered from SR Technics. However, if the approved 

shipping container is not used, SR Technics will not be held accountable for any 

shipping damage.

Units should be returned to SR Technics at the address that follows.

NOTE: Each container shipped to SR Technics shall be marked as follows:

RAT Actuator Program

SR Technics Switzerland Ltd.

Hangarstrasse / Gate 140

Material Receiving SRT

CH- 8302 Kloten

Switzerland

Point of Contact: Peter Kelly 

Peter Kelly

RAT Actuator Program Manager

SR Technics Switzerland

Tel +353 86 852 7509

E-mail: peter.kelly@srtechnics.com

http://www.srtechnics.com
Original Issue Date: May 27/14

Revision 1: Apr 14/15

ERPS06M-29-21

Page 11

SERVICE BULLETIN

Hamilton Sundstrand Corporation, a UTC Aerospace Systems Company

UTC AEROSPACE SYSTEMS PROPRIETARY - Subject to the restriction on the title or cover page.

Subject to the EAR and restrictions on cover (or title) page: ECCN: EAR99

(4) For Hamilton Sundstrand, operators should contact the Miramar Repair Station for 

scheduling information. For the Miramar Repair Station contact information, operators 

should use the Hamilton Sundstrand website at www.utcaerospacesystems.com. 

(Upon entering the website, select “Customer Service” followed by “Repair Services”. 

Click on the link to search for the UTC Aerospace Systems Repair Facility that can 

repair your part. You will be able to search based on the part number.)

(5) The operator will be subject to charges for work done beyond the scope of this bulletin. 

(This includes, but is not limited to, any parts that require repair or replacement 

because of wear, excessive corrosion, or mishandling.)

(6) Hamilton Sundstrand will supply the RAT module identification and modification plates 

required for accomplishment of this bulletin (in the shop) on a no-charge basis to 

operators and customer designees. The identification and modification plates are 

currently available in limited quantities (refer to Table 6 of this bulletin for the parts 

breakdown). Operators and customer designees may place a single “no-charge” order 

to Hamilton Sundstrand. These orders should be forwarded to the assigned Hamilton 

Sundstrand Commercial Spares Administrator (or fax to +1-860-660-7557, if the 

responsible Administrator is not known). In addition, the Hamilton Sundstrand website 

at www.utcaerospacesystems.com can be used to contact the Commercial Spares 

group. Upon entering the website, select “Customer Service” followed by “Spare Parts” 

for other contact and order processing options that are available. Orders must clearly 

reference fleet requirements; noting the service bulletin number, serial numbers of 

affected units, total quantity of parts, and anticipated incorporation schedule. Hamilton 

Sundstrand will acknowledge the order with an established delivery rate.

(7) For a RAT module with an actuator that requires replacement, contact Hamilton 

Sundstrand Commercial Spares for availability and pricing of a replacement actuator 

(PN 5917109-1, PN 5917109-2, or PN 1720399). 

(8) Hamilton Sundstrand will supply the (temporary) actuator nameplates required for 

accomplishment of this bulletin (on the aircraft) on a no-charge basis to operators and 

customer designees. The nameplates are currently available in limited quantities (refer 

to Table 7 of this bulletin for the parts breakdown). Operators and customer designees 

may place a single “no-charge” order to Hamilton Sundstrand. These orders should be 

forwarded to the assigned Hamilton Sundstrand Commercial Spares Administrator (or 

fax to +1-860-660-7557, if the responsible Administrator is not known). In addition, the 

Hamilton Sundstrand website at www.utcaerospacesystems.com can be used to 

contact the Commercial Spares group. Upon entering the website, select “Customer 

Service” followed by “Spare Parts” for other contact and order processing options that 

are available. Orders must clearly reference fleet requirements; noting the service 

bulletin number, serial numbers of affected units, total quantity of parts, and anticipated 

incorporation schedule. Hamilton Sundstrand will acknowledge the order with an 

established delivery rate.
Original Issue Date: May 27/14

Revision 1: Apr 14/15

ERPS06M-29-21

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SERVICE BULLETIN

Hamilton Sundstrand Corporation, a UTC Aerospace Systems Company

UTC AEROSPACE SYSTEMS PROPRIETARY - Subject to the restriction on the title or cover page.

Subject to the EAR and restrictions on cover (or title) page: ECCN: EAR99

B. Industry Support Information

(1) Depending on the part number and serial number of the actuator, the industry support 

information is one of the following:

(a) For a RAT module with an actuator that must be replaced, operators will receive 

a maximum labor allowance of 14.0 man-hours multiplied by the operator's 

current approved hourly rate for replacement of the actuator on the aircraft and 

for on-wing testing. 

(b) For a RAT module with an actuator that only requires identification, operators will 

receive the following: 

1 A maximum labor allowance of 1.0 man-hour multiplied by the operator's 

current approved hourly rate for identification of the actuator and the RAT 

module. 

2 An additional maximum labor allowance of 12.5 man-hours multiplied by the 

operator's current approved hourly rate if the actuator is installed on the 

aircraft and must be removed to view the actuator serial number.

(c) For a RAT module with an actuator (PN 5913233 or PN 5913234), from the 

supplier Liebherr, all costs associated with the replacement of the existing 

actuator with a new actuator (PN 5917109-1, PN 5917109-2, or PN 1720399) are 

at the operator’s expense.

C. Material Necessary For Each Unit

(1) Refer to Hamilton Sundstrand CMM 29-21-31 and Hamilton Sundstrand/Arkwin 

Industries CMM 29-21-07 for expendable parts information.

(2) Material to be Purchased

Table 6

Table 6

New Parts Required for the RAT Module 

New Part Number Keyword

Old Part 

Number Qty Unit Price

Special 

Instructions/

Disposition

5917109-1 

5917109-2

1720399

Liebherr Actuator 5913233

5913234

1 (Note 1)

Replace if 

required

Arkwin Actuator 5912958

5915768

Replace or 

modify and 

reidentify (refer 

to Table 10 of 

this bulletin)
Original Issue Date: May 27/14

Revision 1: Apr 14/15

ERPS06M-29-21

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SERVICE BULLETIN

Hamilton Sundstrand Corporation, a UTC Aerospace Systems Company

UTC AEROSPACE SYSTEMS PROPRIETARY - Subject to the restriction on the title or cover page.

Subject to the EAR and restrictions on cover (or title) page: ECCN: EAR99

Same Modification 

Plate

761251 1 (Note 2) Remove old and 

install new or 

mark as 

necessary

Same Identification 

Plate

755595 1 (Note 2) Remove old and 

install new (for 

RAT module 

PN 766351A or 

PN 768084A) or 

mark as 

necessary

1700217-14 Identification 

Plate

1700217-8 1 (Note 2) Remove old and 

install new (for 

RAT module 

PN 770379A) or 

mark as 

necessary

1700217-15 Identification 

Plate

1700217-9

1700217-10

1700217-11

1 (Note 2) Remove old and 

install new (for 

RAT module 

PN 770952C, 

770952D, or 

770952E) or 

mark as 

necessary

1700217-16 Identification 

Plate

1700217-6

1700217-12

1700217-13

1 (Note 2) Remove old and 

install new (for 

RAT module 

PN 1702934C 

and 

PN 1702934D) 

or mark as 

necessary

Table 6

New Parts Required for the RAT Module (Continued)

New Part Number Keyword

Old Part 

Number Qty Unit Price

Special 

Instructions/

Disposition
Original Issue Date: May 27/14

Revision 1: Apr 14/15

ERPS06M-29-21

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Hamilton Sundstrand Corporation, a UTC Aerospace Systems Company

UTC AEROSPACE SYSTEMS PROPRIETARY - Subject to the restriction on the title or cover page.

Subject to the EAR and restrictions on cover (or title) page: ECCN: EAR99

Table 6 Note 1: Actuators, PN 5917109-1, PN 5917109-2, and PN 1720399, are interchangeable. 

The actuators are available from Hamilton Sundstrand [refer to paragraph 2.A.(7)

of this bulletin].

Table 6 Note 2: Hamilton Sundstrand will supply the noted part at no charge [refer to paragraph 

2.A.(6) of this bulletin for details]. The parts are only required if the RAT module 

is in the shop. Table 7

Table 7 Note 1: Hamilton Sundstrand will supply the noted (temporary) nameplate at no charge 

[refer to paragraph 2.A.(8) of this bulletin for details]. The (temporary) nameplate 

is only required if the RAT module or actuator is not in the shop. Table 8

Table 8 Note 1: The noted (permanent) nameplate has been changed to remove the Arkwin part 

number, 1211575-002 (refer to Figure 3). Actuators that were modified in the shop 

under this bulletin before Revision 1 and were reidentified as PN 5917109-2 

incorporate the earlier (permanent) nameplate that shows the referenced Arkwin 

part number. Refer to Table 12 for serial numbers of the actuators affected.

Table 7

New Parts Required for the Actuator (PN 5915768) (On the Aircraft) 

New 

Part Number Keyword

Old 

Part Number Qty Unit Price

Special 

Instructions/

Disposition

5917109-3

or alternate

1723702-1

(Temporary)

Actuator 

Nameplate 

1211575-227 1 (Note 1) Install new (for an 

actuator to be 

identified as 

5917109-1)

5917109-4

or alternate

1723702-2

(Temporary)

Actuator 

Nameplate

1211575-227 1 (Note 1) Install new (for an 

actuator to be 

identified as 

5917109-2)

Table 8

New Parts Required for the Actuator (In the Shop) 

New 

Part Number Keyword

Old 

Part Number Qty Unit Price

Special 

Instructions/

Disposition

1722420

(Note 1)

(Permanent)

Actuator 

Nameplate

1211575-227

1211575-209

1 (Note 2) Remove old, 

mark and install 

new (for an 

actuator to be 

identified as 

5917109-2)
Original Issue Date: May 27/14

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Hamilton Sundstrand Corporation, a UTC Aerospace Systems Company

UTC AEROSPACE SYSTEMS PROPRIETARY - Subject to the restriction on the title or cover page.

Subject to the EAR and restrictions on cover (or title) page: ECCN: EAR99

Table 8 Note 2: SR Technics or Hamilton Sundstrand will install the noted (permanent) nameplate 

at no charge [refer to paragraph 2.A.(1) of this bulletin for details]. The nameplate 

is only required if the RAT module or actuator is in the shop. 

Table 9

Table 9 Note 1: An equivalent Skydrol® resistant coating may be used.

(3) Material Supplied by the Operator

(a) None

D. Material Necessary For Each Spare

(1) The same as the material necessary for each unit.

E. Reidentified Parts

(1) The following parts may be changed:

Table 10

(2) Incorporation of this bulletin advances the RAT module part numbers as follows (refer 

to Table 11 and paragraph 3.J. of this bulletin). 

Table 9

New Material Required 

Material Name and Number Source Use

Isopropyl Alcohol, 

TT-I-735 or ASTM D770

Commercially Available Use to clean the nameplate 

mounting area and 

nameplate

Clear Polyurethane Coating,

683-3-2/X-310A 

(Note 1)

AKZO Coatings Inc. 

(CAGE Code 98502)

If necessary, use to seal the 

edges of the nameplate

Table 10

Reidentified Parts 

Old Part Number Keyword New Part Number

5912958 Actuator 5917109-2

5915768 Actuator (Refer to Table 2 of this bulletin)
Original Issue Date: May 27/14

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UTC AEROSPACE SYSTEMS PROPRIETARY - Subject to the restriction on the title or cover page.

Subject to the EAR and restrictions on cover (or title) page: ECCN: EAR99

Table 11

F. Tooling - Price and Availability

(1) No tooling other than that required for shop maintenance of the RAT module is required 

to do this modification.

Table 11

RAT Module Part Number Changes 

Old Part Number: New Part Number:

766351A 766351B

768084A 768084B

770379A 770379B

770952C 770952F

770952D 770952F

770952E 770952F

1702934C 1702934E

1702934D 1702934E
Original Issue Date: May 27/14

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UTC AEROSPACE SYSTEMS PROPRIETARY - Subject to the restriction on the title or cover page.

Subject to the EAR and restrictions on cover (or title) page: ECCN: EAR99

3. ACCOMPLISHMENT INSTRUCTIONS

A. General

CAUTION: THE RAT MODULE CONTAINS DESIGN CRITICAL CHARACTERISTICS, 

PROCESSES, AND PROCEDURES. THE DESIGN CRITICAL 

CHARACTERISTICS ARE IDENTIFIED WITH THE SYMBOL >>DCC<<. 

REFER TO THE INTRODUCTION SECTION OF HAMILTON SUNDSTRAND 

CMM 29-21-31 FOR A COMPLETE EXPLANATION OF DESIGN CRITICAL 

CHARACTERISTICS.

(1) The facility performing the work (user) should obtain the material safety data sheets 

[Occupational Safety and Health Act (OSHA) Form 20 or equivalent] from the 

manufacturers or suppliers of materials to be used. The user must become completely 

familiar with the manufacturer/supplier information and adhere to the procedures, 

recommendations, warnings, and cautions of the manufacturer/supplier for the safe 

use, handling, storage, and disposal of these materials. The user should also read the 

long version of the warnings contained in this bulletin. The long version warnings are 

contained in Hamilton Sundstrand Warnings Registry SPM 20-00-04 available free of 

charge to all organizations that are on distribution for this bulletin. The Warnings 

Registry SPM 20-00-04 is also available at myhs.hamiltonsundstrand.com.

B. Check (Actuator Serial Number)

(1) If the actuator is a Liebherr actuator (PN 5913233 or PN 5913234) that does not 

require replacement, proceed to paragraph 3.J. of this bulletin (refer to Figure 1 of this 

bulletin to identify a Liebherr actuator). 

(2) View the serial number on the actuator identification plate (refer to Figure 2 of this 

bulletin for the location of the identification plate).

(a) If necessary, remove the actuator from the RAT module to view the actuator serial 

number (refer to paragraph 3.C. or 3.D. of this bulletin). 

(3) If the actuator requires only identification (the intent of this bulletin has been 

incorporated) (refer to Table 2 of this bulletin), proceed to paragraph 3.F. of this 

bulletin. 

(4) If the actuator requires modification [refer to paragraph 1.A.(2) of this bulletin], do the 

following:

(a) If installed, remove the actuator from the RAT module (refer to paragraph 3.C. or 

3.D. of this bulletin) and then proceed to paragraph 3.E. of this bulletin.
Original Issue Date: May 27/14

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UTC AEROSPACE SYSTEMS PROPRIETARY - Subject to the restriction on the title or cover page.

Subject to the EAR and restrictions on cover (or title) page: ECCN: EAR99

(5) If the actuator incorporates the modifications of the original issue of this service bulletin 

(revision Basic), no further action is necessary.

NOTE: Actuators that incorporate the modifications of the original issue of this 

service bulletin are identified as PN 5917109-1 or 5917109-2. Refer to 

Figure 2 for the location of the (temporary) or (permanent) actuator 

nameplate.

NOTE: The (permanent) nameplate installed on actuators that were modified in the 

shop and reidentified as PN 5917109-2 under the original issue of this 

bulletin also shows the Arkwin PN, 1211575-002, in the “Manufactured By” 

area of the nameplate (refer to Figure 3). The actuators on which this 

nameplate was installed are listed in Table 12.

Table 12

C. Actuator Removal (On the Aircraft)

(1) If the RAT module is on the aircraft, remove the actuator, PN 5912958 or PN 5915768, 

from the RAT module (refer to the applicable Airbus AMM). 

D. Disassembly (Off the Aircraft)

(1) If the RAT module is off the aircraft, remove the actuator (-390F or -390H, IPL Figure 1, 

Hamilton Sundstrand CMM 29-21-31) or (110 or -110A, IPL Figure 2A) from the RAT 

module (refer to CMM 29-21-31, DISASSEMBLY). 

Table 12

Actuators, PN 5917109-2, Incorporating the Modifications of SB ERPS06M-29-21, Revision Basic 

and a (Permanent) Nameplate that also Shows the Arkwin PN 1211575-002

Actuator Serial Number

0005, 01512, 01521, 01534, 01535, 01545, 01562, 01563, 01571, 01620, 01649, 01650, 01656, 

01683, 01719, 01738, 01749, 01757, 01780, 01784, 01817, 01853, 01861, 01880, 01890, 01896, 

01902, 01912, 01928, 01937, 01939, 01945, 01974, 01996, 02006, 02027, 02050, 02117, 02167, 

02173, 02174, 02208, 02210, 02212, 02217, 02222, 02223, 02227, 02235, 02301, 02319, 02332, 

02335, 02350, 02375, 02391
Original Issue Date: May 27/14

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UTC AEROSPACE SYSTEMS PROPRIETARY - Subject to the restriction on the title or cover page.

Subject to the EAR and restrictions on cover (or title) page: ECCN: EAR99

E. Actuator Modification 

NOTE: The actuator [refer to paragraph 1.A.(2) of this bulletin] should be returned 

to SR Technics or Hamilton Sundstrand for modification (refer to paragraph 

2.A. of this bulletin for details). 

(1) If the actuator is part number 5912958, if the actuator serial number is not listed in 

Table 2 of this bulletin, or if the actuator nameplate is missing, SR Technics or 

Hamilton Sundstrand will modify units that are in serviceable condition (refer to 

Hamilton Sundstrand/Arkwin Industries CMM 29-21-07, APPENDIX A), except as 

follows:

(a) Use the new nameplate (PN 1722420) in place of the nameplate (-380, 

IPL Figure 1001, CMM 29-21-07). 

(b) Change the Hamilton Sundstrand part number of the actuator from 5912958 to 

5917109-2.

(2) If the actuator is part number 5915768, SR Technics or Hamilton Sundstrand will shim 

the solenoids of units that are in serviceable condition, test the actuator and identify 

the actuator (refer to Hamilton Sundstrand/Arkwin Industries CMM 29-21-07, 

APPENDIX A), except as follows:

(a) If marked with ink on the housing, remove the Hamilton Sundstrand part number 

5915768, Arkwin part number 1211575-002, and amendment letter “C” markings 

from the housing. 

(b) Use the new nameplate (PN 1722420) in place of the nameplate (-380A, 

IPL Figure 1001, CMM 29-21-07). 

(c) Change the Hamilton Sundstrand part number of the actuator from 5915768 to 

5917109-2.
Original Issue Date: May 27/14

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ERPS06M-29-21

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UTC AEROSPACE SYSTEMS PROPRIETARY - Subject to the restriction on the title or cover page.

Subject to the EAR and restrictions on cover (or title) page: ECCN: EAR99

F. Actuator Identification 

(1) Identify the actuator as follows and then proceed to paragraph 3.G. of this bulletin.

NOTE: Refer to Table 2 of this bulletin to determine if the actuator should be 

identified as part number 5917109-1 or 5917109-2. 

(a) If the actuator is installed on the aircraft, do the following: 

1 Install a new (temporary) nameplate on the actuator housing as follows (refer 

to Figure 2 of this bulletin for the location to install the nameplate).

- Use nameplate, PN 5917109-3, or alternate PN 1723702-1, for actuators 

to be identified as part number 5917109-1.

- Use nameplate, PN 5917109-4, or alternate PN 1723702-2, for actuators 

for actuators to be identified as part number 5917109-2. 

WARNING: USE ISOPROPYL ALCOHOL, TT-I-735 OR ASTM D770, 

CORRECTLY. ISOPROPYL ALCOHOL IS FLAMMABLE, 

EXPLOSIVE, AND A MILD POISON. IT CAN HAVE A BAD 

EFFECT ON YOUR HEALTH OR SAFETY. BEFORE YOU 

USE THE ALCOHOL, GET THE MATERIAL SAFETY DATA 

SHEET FROM THE MANUFACTURER OR SUPPLIER OF 

THE MATERIAL AND READ IT CAREFULLY. READ THE 

DETAILED WARNING, W0046SE, IN THE WARNING 

REGISTRY SPM 20-00-04. BEFORE YOU USE THE 

ALCOHOL, PUT ON CHEMICAL-SPLASH GOGGLES. MAKE 

SURE THAT YOU HAVE SUFFICIENT AIRFLOW TO KEEP 

THE ALCOHOL FUMES BELOW THE MATERIAL SAFETY 

DATA SHEET LIMIT.

a Use a clean, lint-free cloth, soaked in isopropyl alcohol (TT-I-735 or 

ASTM D770), to clean the surface where the new nameplate will be 

installed.

b Let the cleaned surface air dry for 10 minutes minimum.

c Remove the paper backing and install the new nameplate. Press firmly 

to remove any air pockets.
Original Issue Date: May 27/14

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ERPS06M-29-21

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Hamilton Sundstrand Corporation, a UTC Aerospace Systems Company

UTC AEROSPACE SYSTEMS PROPRIETARY - Subject to the restriction on the title or cover page.

Subject to the EAR and restrictions on cover (or title) page: ECCN: EAR99

WARNING: USE ISOPROPYL ALCOHOL, TT-I-735 OR ASTM D770, 

CORRECTLY. ISOPROPYL ALCOHOL IS FLAMMABLE, 

EXPLOSIVE, AND A MILD POISON. IT CAN HAVE A BAD 

EFFECT ON YOUR HEALTH OR SAFETY. BEFORE YOU 

USE THE ALCOHOL, GET THE MATERIAL SAFETY DATA 

SHEET FROM THE MANUFACTURER OR SUPPLIER OF 

THE MATERIAL AND READ IT CAREFULLY. READ THE 

DETAILED WARNING, W0046SE, IN THE WARNING 

REGISTRY SPM 20-00-04. BEFORE YOU USE THE 

ALCOHOL, PUT ON CHEMICAL-SPLASH GOGGLES. MAKE 

SURE THAT YOU HAVE SUFFICIENT AIRFLOW TO KEEP 

THE ALCOHOL FUMES BELOW THE MATERIAL SAFETY 

DATA SHEET LIMIT.

d Use a clean lint-free cloth, soaked with isopropyl alcohol (TT-I-735 or 

ASTM D770), to clean the surface of the new nameplate and the 

surrounding mounting area.

WARNING: COATING, POLYURETHANE, CLEAR, IS TOXIC AND 

FLAMMABLE. DO NOT BREATHE VAPORS. USE IN WELLVENTILATED AREA FREE FROM SPARKS, FLAME, OR HOT 

SURFACES. PUT ON SPLASH GOGGLES, SOLVENTRESISTANT GLOVES, AND OTHER PROTECTIVE GEAR. IN 

CASE OF EYE CONTACT, FLUSH WITH WATER FOR 15 

MINUTES AND SEEK MEDICAL ATTENTION. IN CASE OF 

SKIN CONTACT, WASH WITH SOAP AND WATER.

e Apply clear polyurethane coating (PN 683-3-2/X-310A or equivalent) on 

the edges of the nameplate. 

f Let the coating cure according to the manufacturer’s instructions. 

NOTE: The next time the actuator is in the shop, the temporary 

nameplate must be replaced with a permanent nameplate 

(PN 1722420). 

2 Mark out the part numbers on the existing actuator nameplate (refer to 

Figure 2 of this bulletin for the location of the existing nameplate). 

(b) If the actuator is in the shop, replace the existing nameplate (-380 or -380A, 

IPL Figure 1001, CMM 29-21-07) with a new (permanent) nameplate 

(PN 1722420) as follows (refer to SPM 20-00-00, ASSEMBLY): 

1 Mark the number 2 after the part number 5917109- on the new nameplate 

(PN 1722420).

2 Transfer the serial number and date of manufacture information from the 

existing nameplate (-380 or -380A) to the new nameplate (PN 1722420).

3 Mark the amendment letter D on the new nameplate (PN 1722420).
Original Issue Date: May 27/14

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UTC AEROSPACE SYSTEMS PROPRIETARY - Subject to the restriction on the title or cover page.

Subject to the EAR and restrictions on cover (or title) page: ECCN: EAR99

4 Install the new nameplate (PN 1722420) on the actuator (refer to 

CMM 29-21-07, ASSEMBLY, and Figure 2 of this bulletin).

NOTE: The new nameplate must be installed on the actuator in the 

position and direction shown in Figure 2 so that the information can 

be read when the RAT module is installed in the aircraft.

G. Assembly (Off the Aircraft)

(1) If the RAT module is off the aircraft, install (if removed) the actuator (PN 5917109-1, 

PN 5917109-2, or PN 1720399) or the Liebherr actuator (PN 5913233 or PN 5913234)

on the RAT module (refer to Hamilton Sundstrand CMM 29-21-31, ASSEMBLY). 

H. Actuator Installation (On the Aircraft)

(1) If the RAT module is on the aircraft, install (if removed) the actuator (PN 5917109-1, 

PN 5917109-2, or PN 1720399) or the Liebherr actuator (PN 5913233 or PN 5913234)

on the RAT module (refer to the applicable Airbus AMM). 

I. Test 

NOTE: No test is necessary if the intent of this bulletin had previously been 

incorporated and the actuator was not removed from the RAT module to view 

the actuator serial number.

(1) If the RAT module is in the shop, do a test of the RAT module (refer to Hamilton 

Sundstrand CMM 29-21-31, TESTING AND FAULT ISOLATION). 

(2) If the RAT module is on the aircraft, do a test of the RAT (automatic and manual 

deployment) (refer to the applicable Airbus AMM). 

(3) If the actuator was replaced while the RAT module was off the aircraft, test the RAT 

module upon installation on the aircraft (refer to the applicable AMM). 
Original Issue Date: May 27/14

Revision 1: Apr 14/15

ERPS06M-29-21

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UTC AEROSPACE SYSTEMS PROPRIETARY - Subject to the restriction on the title or cover page.

Subject to the EAR and restrictions on cover (or title) page: ECCN: EAR99

J. RAT Module Identification (On the Aircraft)

NOTE: Replacement of the RAT module identification plate and modification plate 

on the aircraft should be avoided. If an identification plate or modification 

plate is not installed correctly (using the instructions in the CMM), it can 

come loose. This can result in a missing identification plate or modification 

plate. 

NOTE: If the RAT module identification plate or modification plate is missing, 

operators should contact Hamilton Sundstrand for a replacement part. 

NOTE: If additional information is required to mark the RAT module identification or 

modification plate, operators should contact the following Hamilton 

Sundstrand Service Engineer:

Greg Kuczek

Phone: +1-815-226-6581

Fax: +1-860-660-4995

E-Mail: gregory.kuczek@utas.utc.com

(1) If the RAT module is on the aircraft, identify the RAT module as follows:

(a) Use a ball point pen (or an equivalent permanent marking method) to do the steps 

that follow. (Refer to Figure 2 of this bulletin for the location of the identification 

plate). 

1 Change the part number (of the RAT module) on the RAT module 

identification plate as shown in Table 13 of this bulletin.

2 Put a mark through the part number bar code on the RAT module 

identification plate. Table 13

Table 13

RAT Module Part Number Changes 

Old Part Number: New Part Number:

766351A 766351B

768084A 768084B

770379A 770379B

770952C 770952F

770952D 770952F

770952E 770952F

1702934C 1702934E

1702934D 1702934E
Original Issue Date: May 27/14

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Subject to the EAR and restrictions on cover (or title) page: ECCN: EAR99

(b) Use a ball point pen (or an equivalent permanent marking method) to mark an X 

through Mod Dot 21 (and Mod Dots 8, 12, 13, and 18, if not already marked) on 

the RAT module modification plate. (Refer to Figure 2 of this bulletin for the 

location of the RAT module modification plate).

NOTE: The next time the modified RAT module is in the shop:

1. For RAT modules with bar-coded identification plates, the 

existing identification plate must be replaced with a new 

identification plate (refer to Table 14 of this bulletin and 

Hamilton Sundstrand CMM 29-21-31, ASSEMBLY).

2. The existing modification plate must be replaced with a new 

modification plate (PN 761251) (refer to Hamilton Sundstrand 

CMM 29-21-31, ASSEMBLY). 

K. RAT Module Identification (In the Shop)

(1) Identify the RAT module as follows (refer to SPM 20-00-00, ASSEMBLY): 

(a) Replace the identification plate as follows: 

NOTE: Incorporation of this bulletin advances the RAT module part number 

(refer to Table 14 of this bulletin).

1 Transfer any pertinent information from the existing identification plate to a 

new identification plate (refer to Table 14 of this bulletin). 

2 Replace the existing identification plate with the new identification plate 

(refer to Table 14 of this bulletin and CMM 29-21-31, ASSEMBLY). 

(b) Replace the modification plate (555, IPL Figure 1, CMM 29-21-31) or (350, 

IPL Figure 1A,) as follows: 

1 Mark the applicable new RAT module part number (refer to Table 14 of this 

bulletin) on a new modification plate (555, IPL Figure 1) or (350, 

IPL Figure 1A).

2 Transfer any pertinent information from the existing modification plate to the 

new modification plate (555, IPL Figure 1) or (350, IPL Figure 1A). 

3 Mark an X through Mod Dot 21 (and Mod Dots 8, 12, 13, and 18, if not 

already marked) on the new modification plate (555, IPL Figure 1) or (350, 

IPL Figure 1A).

4 Replace the existing modification plate with the new modification plate (555, 

IPL Figure 1) or (350, IPL Figure 1A).
Original Issue Date: May 27/14

Revision 1: Apr 14/15

ERPS06M-29-21

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SERVICE BULLETIN

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UTC AEROSPACE SYSTEMS PROPRIETARY - Subject to the restriction on the title or cover page.

Subject to the EAR and restrictions on cover (or title) page: ECCN: EAR99

Table 14

Table 14

RAT Module Identification 

From

Part Number

To

Part Number

Existing 

Identification Plate

Part Number

New 

Identification Plate 

Part Number

766351A 766351B 755595 (540, IPL Figure 1, CMM 29-21-31) 755595

768084A 768084B 755595 (540) 755595

770379A 770379B 1700217-8 (-540E) 1700217-14

770952C 770952F 1700217-9 (-540F) 1700217-15

770952D 770952F 1700217-10 (-540G) 1700217-15

770952E 770952F 1700217-11 (-540H) 1700217-15

1702934C 1702934E 1700217-12 (-360C, IPL Figure 1A) 1700217-16

1702934D 1702934E 1700217-13 (-360D) 1700217-16
Original Issue Date: May 27/14

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UTC AEROSPACE SYSTEMS PROPRIETARY - Subject to the restriction on the title or cover page.

Subject to the EAR and restrictions on cover (or title) page: ECCN: EAR99

Figure 1

Figure 1

Identification of the Actuator

SB-ERPS06M2121-117033

ACTUATOR FROM

THE SUPPLIER ARKWIN

ACTUATOR FROM

THE SUPPLIER LIEBHERR

LOCATION OF

NAMEPLATE
Original Issue Date: May 27/14

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UTC AEROSPACE SYSTEMS PROPRIETARY - Subject to the restriction on the title or cover page.

Subject to the EAR and restrictions on cover (or title) page: ECCN: EAR99

Figure 2

Figure 2

Actuator and RAT Module Identification

SB-ERPS06M2921-116791-A

VIEW A-A

(ACTUATOR SHOWN REMOVED)

LOCATION OF THE (EXISTING) ACTUATOR NAMEPLATE.

IF REPLACING WITH A NEW (PERMANENT) ACTUATOR

NAMEPLATE, INSTALL SO THAT THE PART NUMBER AND

SERIAL NUMBER CAN BE SEEN FROM THE SIDE OF 

THE ACTUATOR SHOWN IN THIS VIEW. SEE DETAIL B FOR 

MORE INFORMATION ON THE CORRECT INSTALLATION.

LOCATION TO INSTALL THE

(TEMPORARY) ACTUATOR 

NAMEPLATE IF THE ACTUATOR

IS NOT REMOVED FROM

THE RAT MODULE

RAT MODULE

MODIFICATION PLATE

RAT MODULE

IDENTIFICATION PLATE

A

A

ARKWIN

ACTUATOR

DETAIL B

INSTALL THE NAMEPLATE

IN THE DIRECTION SHOWN

FWD

FWD

FWD

B
Original Issue Date: May 27/14

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Subject to the EAR and restrictions on cover (or title) page: ECCN: EAR99

Figure 3

Figure 3

Change in the New (Permanent) Nameplate, PN 1722420

SB-ERPS06M2921-121222

DMF

SER

AMENDT

5917109-

P/N 1211575-002

INSPECT Manufactured By:

ARKWIN INDUSTRIES

WESTBURY NY US CAGE 98391

ACTUATOR-RAT

HAMILTON SUNDSTRAND

ROCKFORD IL US CAGE 99167

PERMANENT NAMEPLATE INSTALLED IN SB ERPS06M-29-21, REVISION BASIC (ORIGINAL ISSUE)

 (REFER TO TABLE 12 IN THIS SERVICE BULLETIN FOR ACTUATOR SERIAL NUMBERS)

ARKWIN PART NUMBER SHOWN

DMF

SER

AMENDT

5917109-

INSPECT Manufactured By:

ARKWIN INDUSTRIES

WESTBURY NY US CAGE 98391

ACTUATOR-RAT

HAMILTON SUNDSTRAND

ROCKFORD IL US CAGE 99167

PERMANENT NAMEPLATE TO BE INSTALLED IN SB ERPS06M-29-21, REVISION 1

 [REFER TO PARAGRAPH 3.F.(1)(b) IN THIS SERVICE BULLETIN]

ARKWIN PART NUMBER REMOVED