FALCON 7X

No 289

JANUARY 21, 2015

MANDATORY

ATA 24

ELECTRICAL POWER

RAM AIR TURBINE

SMOOTH RAT DEPLOYMENT AND WARNING PLATE

REPLACEMENT

FALCON SERVICE BULLETIN

Copyright © 2015 by Dassault Aviation

All rights reserved. No part of this work may be reproduced or copied

in any form or by any means without written permission

of Dassault Aviation.

785
ELECTRICAL POWER

RAM AIR TURBINE

SMOOTH RAT DEPLOYMENT AND WARNING PLATE REPLACEMENT

Initial issuance January 21, 2015

List of effective pages :

1 to 13

FALCON 7X 7X -289

ATA 24
ELECTRICAL POWER

RAM AIR TURBINE

SMOOTH RAT DEPLOYMENT AND WARNING PLATE REPLACEMENT

1. PLANNING INFORMATION

A. EFFECTIVITY

This Service Bulletin is applicable to FALCON 7X aircraft with serial numbers 2 and subsequent that

have not previously implemented DASSAULT AVIATION modification FALCON 7X M1428.

B. REASON

A few cases of Ram Air Turbine (RAT) blade damaged during maintenance operations have been

reported.

Damage occurred either during stowage of the RAT or its deployment for maintenance purposes and

are caused by an incorrect locking of the RAT during retraction.

The purpose of this Service Bulletin is to improve stowing instructions in order to prevent such

situations.

C. DESCRIPTION

The operation consists in replacing the sticker on the RAT with a new one with improved stowing

instructions.

D. COMPLIANCE

Mandatory:

• It is anticipated that this Service Bulletin will be rendered mandatory by an EASA Airworthiness

Directive.

• As prescribed by the Airworthiness Authorities of the country of registration of the aircraft.

E. APPROVAL

This Service Bulletin covers DASSAULT AVIATION modification FALCON 7X M1428 that has been

approved under the authority of DOA nr. EASA.21J.051.

The technical content of this document is approved under the authority of DOA nr. EASA.21J.051.

F. LABOR

Estimated labor-hours: Refer to Service Bulletin Commercial Summary.

CAUTION: TWO OPERATORS ARE NECESSARY TO DEPLOY AND RETRACT THE RAT.

NOTE: These labor-hours only concern the work described in this Service Bulletin and do not include

other maintenance work that may be performed on this occasion.

G. MATERIAL - PRICE AND AVAILABILITY

The modification kit may be obtained from either address listed below:

FALCON 7X 7X -289

January 21, 2015 ATA 24

Initial issuance Page 1 / 13

DASSAULT AVIATION Proprietary Data
Western hemisphere: DASSAULT FALCON JET CORP.

SPARES DISTRIBUTION CENTER

200 RISER ROAD

LITTLE FERRY, NJ 07643 U.S.A.

Telephone:

• CANADA and U.S.A.: 1-800-800-4036

• MEXICO: 001-800-800-4036

• Other countries: 1-201-541-4809

Fax:

• CANADA and U.S.A.: 1-800-800-4817

• MEXICO: 001-800-800-4817

• Other countries: 1-201-440-7021

Other continents: DASSAULT AVIATION

Falcon Spares

BOITE POSTALE N°101

AEROPORT DU BOURGET

93350 - LE BOURGET Cedex (FRANCE)

Please contact your Dassault Aviation

Account Representative

Telephone: 33 (0)1.48.35.56.78

Fax: 33 (0)1.48.35.56.00

E/H dafsorder@dassault-aviation.com

Price and availability on request.

H. TOOLING - PRICE AND AVAILABILITY

Normal maintenance tooling.

Helmet for OP_B

I. WEIGHT AND BALANCE

Change in weight: None.

Change in balance with respect to 25% MAC: None.

J. REFERENCES

Aircraft Maintenance Manual:

• GENERAL MAINTENANCE AND SAFETY PRECAUTIONS (Refer to TASK 20-00-00-910-801)

• ELECTRICAL SYSTEM MAINTENANCE AND SAFETY PRECAUTIONS (Refer to TASK

24-00-00-910-801)

• RAT SYSTEM MAINTENANCE AND SAFETY PRECAUTIONS (Refer to TASK

24-50-00-910-801)

• RETRACTION OF THE RAM AIR TURBINE (RAT) (Refer to TASK 24-50-00-910-804)

• HYDRAULIC SYSTEM MAINTENANCE AND SAFETY PRECAUTIONS (Refer to TASK

29-00-00-910-801)

FALCON 7X 7X -289

January 21, 2015 ATA 24

Initial issuance Page 2 / 13

DASSAULT AVIATION Proprietary Data
UTC AEROSPACE SYSTEMS - Service Bulletin ERPS39T-24-2

K. OTHER PUBLICATIONS AFFECTED

The following publication will be revised at a later date to account for the changes introduced by this

Service Bulletin:

• Illustrated Parts Catalog.

FALCON 7X 7X -289

January 21, 2015 ATA 24

Initial issuance Page 3 / 13

DASSAULT AVIATION Proprietary Data
2. ACCOMPLISHMENT INSTRUCTIONS

A. PRELIMINARY STEPS

(1) The aircraft must be in the maintenance configuration (Refer to TASK 20-00-00-910-801).

(2) Obey the electrical system maintenance and safety precautions (Refer to TASK

24-00-00-910-801).

(3) Obey the RAT system maintenance and safety precautions (Refer to TASK 24-50-00-910-801).

(4) Obey the hydraulic system maintenance and safety precautions (Refer to TASK

29-00-00-910-801).

(5) Remove the screws and the protective cover from RAT restow pump (3000PN) (fig. 1).

B. PROCEDURE

(1) Deploy the RAT as follows:

NOTE 1: Two operators are necessary to slowly and safely deploy the RAT.

NOTE 2: OP_A and OP_B will be used in the following procedure to describe who should do

what.

CAUTION: MAKE SURE THAT THE AIRCRAFT SYSTEMS ARE DE-ENERGIZED. THIS WILL

PREVENT INJURIES TO PERSONNEL AND DAMAGE TO THE EQUIPMENT.

CAUTION: MAKE SURE THAT NO-ONE, EXCEPT OP_B WILL ACCESS NEITHER THE

AIRCRAFT COCKPIT, NOR THE RAT DEPLOYMENT AREA (FRONT RH SIDE OF

THE AIRCRAFT) DURING THE FOLLOWING STEPS.

WARNING: OP_B RISKS SEVERE INJURIES IN CASE OF UNTIMELY RAT DEPLOYMENT

IF THE PROCEDURE IS NOT PROPERLY APPLIED (HELMET IS MANDATORY).

(a) OP_A takes place in the NLG wheel and removes the RAT ground lock pin (AGE 13811)

through the RH structure of the NLG wheel well to unlock the RAT uplock mechanism.

(b) OP_B takes place in the cockpit.

(c) OP_A, using a 7/16 in (0.4375) key, turns the restow pump “ARM/STOW” valve (2-fig. 1)

from “ARM” to the “STOW” position. From that point, OP_A must mandatorily keep a

constant pressure on this key to stay on the “STOW” position during all following steps.

(d) OP_A, with his other hand, operates the restow pump handle (1-fig. 1) as if he wanted to

retract the RAT. This will increase the oil pressure in the system, counter-act the

deployment actuator spring, and force the RAT deployment actuator to stay in the stowed

position.

• OP_A stops pumping on the handle when it is becoming more and more difficult.

• OP_A then indicates OP_B that he’s ready for RAT deployment.

• OP_A continues of course to keep the pressure / key on the “STOW” position.

FALCON 7X 7X -289

January 21, 2015 ATA 24

Initial issuance Page 4 / 13

DASSAULT AVIATION Proprietary Data
(e) OP_B in the cockpit pulls the “RAT MANUAL DEPLOYMENT” lever and keeps the lever

pulled until OP_A reports the RAT door has slightly open.

NOTE: A loud sound (“clong”) is heard when the uplock hook releases the RAT. The RAT

is now unlocked but shall not deploy as restow pump key is still set on “STOW"

position (by OP_A).

(f) From that point, OP_A will make the RAT deploy slowly:

• Releasing slightly the key from the “STOW” position will slowly deploy the RAT.

• Setting back the key to the “STOW” position will slow/stop the RAT deployment.

• If necessary (if RAT blade is jammed) : “stow” position + lever actuation will move up

and retract the RAT turbine & blade.

(g) As soon as OP_A sees the RAT door slightly opening, OP_A stops the deployment and

OP_B releases the "RAT MANUAL DEPLOYMENT" lever.

(h) OP_B exits the cockpit, takes a mirror and a ~20 inches long stick. Then he goes and

checks the good deployment of RAT. fig. 2 and fig. 3 provide recommended safety location

for OP_B. 

WARNING: OP_B SHALL NEVER PUT DIRECTLY HIS ARMS / HANDS / HEAD IN THE FIG.

3 “DANGER AREA”. FROM THAT POINT, IF OP_A MISTAKENLY

DISCONNECTS THE KEY FROM THE “STOW” POSITION OF THE RESTOW

PUMP (BEWARE, THE KEY CAN EASILY SLIDE), THE RAT (AND BLADES)

WILL SUDDENLY DEPLOY AND MAY CAUSE INJURIES TO OP_B.

(i) During RAT deployment, OP_B shall check that the RAT deploys freely:

• the blade should not be behind the uplock hook solenoid (fig. 4),

• if the blade goes behind the uplock hook solenoid (meaning the RAT turbine was not

well locked when previously stowed, has rotated and that the RAT may be blocked /

damaged by the uplock hook solenoid), then OP_A shall stop deployment and OP_B

shall free the blade using the stick (so that his hands may not be hurt by RAT/blade

deployment in case of wrong operation by OP_A).

(j) At 50% of RAT deployment, OP_B shall visually check if the RAT index lock pin is well

engaged (= pin engaged in the slot at the rear of the turbine hub) (fig. 5)

(k) When RAT is fully deployed, OP_A can release the “STOW” position and remove the key.

(2) Replace the warning plate according to UTC Aerospace Systems Service Bulletin ERPS39T-24-2

(fig. 6).

CAUTION: IDENTIFICATION OF THE NEW PART NUMBER MUST BE PERFORMED USING

A BALLPOINT PEN.

(3) Send to technicalcenter@dassault-aviation.com the result of the inspection:

• Subject: Service Bulletin 7X-289 feedback

• Aircraft serial number, date and location

• Please answer question: was the RAT rotation well blocked (index lock pin engaged) when

deployed and checked at 50% ?

• Please answer question: was a blade jammed (i.e.: behind the uplock hook solenoid) ?

C. FINAL STEPS

FALCON 7X 7X -289

January 21, 2015 ATA 24

Initial issuance Page 5 / 13

DASSAULT AVIATION Proprietary Data
(1) Retract the RAT (Refer to TASK 24-50-00-910-804).

NOTE 1: Two operators are necessary to retract the RAT.

NOTE 2: 10° corresponds to 40 restow pump actions.

(2) Install the protective cover on RAT restow pump (3000PN) and attach it with the screws (fig. 1).

D. RECORDING

Record compliance with this Service Bulletin in the appropriate aircraft documents.

Fill out the electronic Service Bulletin reply form located in the ”Service Bulletin" page on the Falcon

portal.

FALCON 7X 7X -289

January 21, 2015 ATA 24

Initial issuance Page 6 / 13

DASSAULT AVIATION Proprietary Data
3. MATERIAL INFORMATION

A. MODIFICATION OF RAT PART NUMBER

NEW P/N QTY KEY WORD OLD P/N

1705673B with symbol 24-2 1 RAT 1705673A

NOTE: Compliance with this Service Bulletin by substituting the above part number(s) with (an)

interchangeable subsequent part number(s) is acceptable, provided the subsequent part

numbers have the same effectivity as the original part number.

B. MODIFICATION KIT

Kit P/N SBF7X0289A

NEW P/N QTY KEY WORD

1721516 1 Warning plate

C. LOCAL PROCUREMENT

Refer to UTC Aerospace Systems Service Bulletin ERPS39T-24-2.

FALCON 7X 7X -289

January 21, 2015 ATA 24

Initial issuance Page 7 / 13

DASSAULT AVIATION Proprietary Data
Figure 1: RESTOW PUMP - "ARM/STOW" VALVE + LEVER

FALCON 7X 7X -289

January 21, 2015 ATA 24

Initial issuance Page 8 / 13
Figure 2: RECOMMENDED LOCATION OF OP_B (TO CHECK SAFELY THE RAT DEPLOYMENT)

FALCON 7X 7X -289

January 21, 2015 ATA 24

Initial issuance Page 9 / 13
Figure 3: RECOMMENDED LOCATION OF OP_B

FALCON 7X 7X -289

January 21, 2015 ATA 24

Initial issuance Page 10 / 13
Figure 4: EXAMPLE OF RAT DEPLOYMENT

FALCON 7X 7X -289

January 21, 2015 ATA 24

Initial issuance Page 11 / 13
Figure 5: EXAMPLE OF RAT ROTATION WELL LOCKED

FALCON 7X 7X -289

January 21, 2015 ATA 24

Initial issuance Page 12 / 13
Figure 6: RAT MODIFIED

END OF DOCUMENT

FALCON 7X 7X -289

January 21, 2015 ATA 24

Initial issuance Page 13 / 13
Original Issue Date: May 26/14 ERPS39T-24-2

Page 1 of 9

SERVICE BULLETIN

Hamilton Sundstrand Corporation, a UTC Aerospace Systems Company

EMERGENCY ELECTRICAL POWER - RAM AIR TURBINE - REPLACE WARNING PLATE

© 2014 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’ 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’ EXPRESS WRITTEN PERMISSION IS NOT AUTHORIZED AND MAY RESULT IN CRIMINAL AND/OR CIVIL LIABILITY. 

INFORMATION SUBJECT TO EXPORT CONTROL LAWS

Subject to the EAR, ECCN 9E991

This information is subject to the export control laws of the United States, specifically including the Export Administration Regulations (EAR), 

15 C.F.R. Part 730 et. seq. Transfer, retransfer, or disclosure of this data by any means to a non-U.S. person (individual or company), 

whether in the United States or abroad, without any required export license or other approval from the U.S Government is prohibited, 

including without limitation any diversion to a military end user or use in a military end use application. 

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.

1. PLANNING INFORMATION

A. Effectivity

(1) Hamilton Sundstrand Ram Air Turbine Assembly (RAT), Model ERPS39T, part 

number 1705673A, all serial numbers, used on Dassault Falcon 7X aircraft.

B. Concurrent Requirements

(1) None

C. Reason

(1) Field experience has shown that some operators have not complied with the instruction 

on existing warning plate. The existing warning plate states "Warning - Align Arrows 

Prior to Retraction - Warning". If the arrows are not aligned prior to retraction, the 

blades will not be locked in the correct position when the RAT is stowed. This can 

result in blade damage. A new replacement warning plate includes checks to make 

sure the blades are locked when the RAT is retracted ten degrees. When operators 

do the checks (visually check that the turbine lock pin has entered its slot and manually 

check that the turbine rotation is successfully locked) the blades will be locked in the 

correct position when the RAT is stowed. 
Original Issue Date: May 26/14 ERPS39T-24-2

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 - See the Title, First, or Cover Page for more information.

D. Description

(1) This bulletin gives the instructions to replace the warning plate and identify the RAT.

E. Compliance

(1) Incorporation of this service bulletin is to be accomplished at the earliest opportunity. 

Incorporation of this service bulletin is mandatory.

F. Approval

(1) Approval statement to be provided by Dassault.

G. Manpower

(1) Approximately 1.5 man-hours are required to replace the warning plate and 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) 24-23-62

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

(3) Hamilton Sundstrand Engineering Change (EC) 13D034

L. Other Publications Affected

(1) Hamilton Sundstrand CMM 24-23-62 will be revised to incorporate this bulletin.

M. Interchangeability or Intermixability of Parts

(1) The incorporation of this bulletin does not affect the interchangeability or intermixability 

of the RAT. 

2. MATERIAL INFORMATION

A. Material - Price and Availability

(1) Operators should contact Dassault for the parts required to perform this modification. 

Refer to Table 1 of this bulletin for the breakdown of the individual parts.
Original Issue Date: May 26/14 ERPS39T-24-2

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 - See the Title, First, or Cover Page for more information.

B. Industry Support Information

(1) Operators should contact the Rockford Repair Station for scheduling information. For 

the Rockford Repair Station contact information, operators should use the UTC 

Aerospace Systems 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. For 

the part number, enter 1705673).

C. Material Necessary For Each Unit

(1) Refer to Hamilton Sundstrand CMM 24-23-62 for expendable parts information.

(2) Material to be Purchased

Table 1

Table 1 Note 1: Dassault will provide the parts required to perform this modification (refer to 

paragraph 2.A.(1) of this bulletin for details).

Table 2

(3) Material Supplied by the Operator

(a) None

Table 1

New Parts Required 

New

Part Number Keyword

Old

Part Number Qty Unit Price

Special 

Instructions/

Disposition

1721516 Warning Plate 735276 1 (Note 1) Remove old, 

install new

1701897 ID Plate 1701897 1 (Note 1) Remove old, 

install new

Table 2

New Material Required 

Material Name and Number Source Use

Sealant Remover, 

Eldorado PR-3133

Commercially Available Used to soften the sealant 

to remove the existing 

warning plate and the 

identification plate.

Solvent-resistant sealant, 

Oxy-Bond, 109DP

Resin Technologies Group, 

Inc

(CAGE Code V0JVX9)

Used to seal the edges of 

the warning plate and the 

identification plate.

Isopropyl Alcohol (ATSM D329) Commercially Available Used to clean surfaces.
Original Issue Date: May 26/14 ERPS39T-24-2

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 - See the Title, First, or Cover Page for more information.

D. Material Necessary For Each Spare

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

E. Reidentified Parts

(1) The RAT part number is changed from 1705673A to 1705673B (refer to paragraph 3.C.

of this bulletin).

F. Tooling - Price and Availability

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

this modification.

3. ACCOMPLISHMENT INSTRUCTIONS

A. General

CAUTION: THE RAT 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 24-23-62 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.

(2) A unit modified according to this service bulletin might be returned to the shop for 

maintenance or repair before the new or modified part numbers or procedures in this 

bulletin are incorporated into the applicable CMM.

Until this service bulletin is incorporated into the CMM, operators are allowed to 

disassemble, clean, check, repair, assemble, and test the unit according to the 

applicable CMM, using the new or modified part numbers or procedures in this bulletin.

After this service bulletin is incorporated into the CMM, the CMM procedures will 

supersede this bulletin.
Original Issue Date: May 26/14 ERPS39T-24-2

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 - See the Title, First, or Cover Page for more information.

B. Modification

CAUTION: USE SEALANT REMOVER, ELDORADO PR-3133, CORRECTLY. IT CAN 

HAVE A BAD EFFECT ON YOUR HEALTH OR SAFETY. BEFORE YOU USE 

THE SEALANT REMOVER, GET THE MATERIAL SAFETY DATA SHEET 

(MSDS) FROM THE MANUFACTURER OR SUPPLIER OF THE MATERIAL. 

READ THE MSDS CAREFULLY. READ THE DETAILED WARNING,

W0282SE, IN THE WARNINGS REGISTRY SPM 20-00-04. DO NOT USE 

THE SEALANT REMOVER IN A CONFINED SPACE. MAKE SURE YOU 

HAVE SUFFICIENT AIRFLOW TO KEEP THE FUMES BELOW THE MSDS 

LIMIT. IF THE SEALANT REMOVER IS SPRAYED, AN ORGANIC VAPOR 

FILTER OR FRESH AIR SUPPLY MASK MUST BE WORN. AVOID ALL SKIN 

CONTACT. BEFORE YOU USE THE SEALANT REMOVER, PUT ON A FACE 

SHIELD, GOGGLES, RUBBER APRON, RUBBER BOOTS, AND RUBBER 

OR NEOPRENE PROTECTIVE GLOVES. AFTER USE OF THE SEALANT 

REMOVER, MAKE SURE TO CLEAN YOUR HANDS AND FACE WITH SOAP 

AND WATER. 

(1) Use a small brush to apply sealant remover, Eldorado PR-3133, on the sealant that is 

around the edges of the warning plate (refer to item 20, IPL Figure 1, CMM 24-23-62, 

or Figure 1 of this bulletin, for the location of the warning plate). Let sealant remover 

remain on for 30 minutes to soften the sealant. 

CAUTION: USE CARE WHEN REMOVING THE SEALANT TO PREVENT DAMAGE TO 

THE ALUMINUM HOUSING.

(2) After the sealant has softened to the extent that it can be easily removed, use a plastic 

scraper to carefully remove the sealant from around the edges of the warning plate 

(20). 

(3) Remove the warning plate (20).

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 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.

(4) Use a clean, lint-free cloth, soaked in isopropyl alcohol (ASTM D770), to clean the 

surface where the new warning plate, part number 1721516, will be installed.

(5) Let the cleaned surface air dry for 10 minutes minimum.

(6) Remove the paper backing and install the new warning plate, part number 1721516 

(refer to item 20A, IPL Figure 1, CMM 24-23-62, or Figure 1 of this bulletin, for the 

location to install the new warning plate). Press firmly to remove any air pockets.
Original Issue Date: May 26/14 ERPS39T-24-2

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 - See the Title, First, or Cover Page for more information.

WARNING: USE SOLVENT-RESISTANT NAMEPLATE SEALANT, OXY-BOND 109DP, 

CORRECTLY. THE HARDENER IS CORROSIVE, REACTIVE AND 

FLAMMABLE. THE RESIN IS REACTIVE AND IT IS FLAMMABLE. IT CAN 

HAVE A BAD EFFECT ON YOUR HEALTH OR SAFETY. BEFORE YOU USE 

THE SEALANT, GET THE MATERIAL SAFETY DATA SHEET FROM THE 

MANUFACTURER OR SUPPLIER OF THE MATERIAL AND READ IT 

CAREFULLY. READ THE DETAILED WARNING, W0199SE, IN THE 

WARNING REGISTRY SPM 20-00-04. BEFORE YOU USE THE SEALANT, 

PUT ON SAFETY GLASSES OR CHEMICAL-SPLASH GOGGLES AND 

SOLVENT RESISTANT GLOVES. MAKE SURE THAT YOU HAVE 

SUFFICIENT AIRFLOW TO KEEP THE SEALANT FUMES BELOW THE 

MATERIAL SAFETY DATA SHEET LIMIT.

(7) Use a small brush to apply solvent-resistant nameplate sealant, Oxy-Bond 109DP, to 

the edges of the new warning plate, part number 1721516 (20A).

WARNING: PUT ON THERMALLY INSULATED GLOVES AND OTHER SUITABLE 

PROTECTION TO PREVENT BURNS WHEN LOADING PARTS INTO A 

PREHEATED OVEN OR HANDLING HEATED OR CHILLED PARTS.

(8) Let the adhesive cure for 24 hours at room temperature [75 ±5 degrees Fahrenheit 

(24 ±2 degrees Celsius)] or at 150 degrees Fahrenheit (66 degrees Celsius) for 30 

minutes.

C. Identification

(1) Do one of the following two options to identify the RAT (refer to item 10, IPL Figure 1, 

CMM 24-23-62, or Figure 1 of this bulletin for the location of the identification plate):

NOTE: The RAT part number is changed from 1705673A to 1705673B.

(a) Use a ballpoint pen (or other permanent marking method) to change the existing 

RAT identification plate (10, IPL Figure 1, CMM 24-23-62) (PN 1701897) as 

follows:

1 In the PART NO block of the identification plate (10), put a mark through the 

letter A and add the letter B after part number 1705673.

2 Use a ballpoint pen (or other permanent marking method) to add the symbol 

24-2 to a blank area of the existing identification plate (10).

(b) Replace the existing RAT identification plate (10), part number 1701897, as 

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

1 If not already done, use a ballpoint pen (or other permanent marking method) 

to mark the part number 1705673B in the PART NO block of the new 

identification plate, part number 1701897.

2 Transfer any other data from the existing RAT identification plate (10) to a 

new identification plate, part number 1701897.
Original Issue Date: May 26/14 ERPS39T-24-2

Page 7

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 - See the Title, First, or Cover Page for more information.

3 Use a ballpoint pen (or other permanent marking method) to add the symbol 

24-2 to a blank area of the new identification plate, part number 1701897.

CAUTION: USE SEALANT REMOVER, ELDORADO PR-3133, CORRECTLY. 

IT CAN HAVE A BAD EFFECT ON YOUR HEALTH OR SAFETY. 

BEFORE YOU USE THE SEALANT REMOVER, GET THE 

MATERIAL SAFETY DATA SHEET (MSDS) FROM THE 

MANUFACTURER OR SUPPLIER OF THE MATERIAL. READ THE

MSDS CAREFULLY. READ THE DETAILED WARNING, W0282SE,

IN THE WARNINGS REGISTRY SPM 20-00-04. DO NOT USE THE 

SEALANT REMOVER IN A CONFINED SPACE. MAKE SURE YOU 

HAVE SUFFICIENT AIRFLOW TO KEEP THE FUMES BELOW THE

MSDS LIMIT. IF THE SEALANT REMOVER IS SPRAYED, AN 

ORGANIC VAPOR FILTER OR FRESH AIR SUPPLY MASK MUST 

BE WORN. AVOID ALL SKIN CONTACT. BEFORE YOU USE THE 

SEALANT REMOVER, PUT ON A FACE SHIELD, GOGGLES, 

RUBBER APRON, RUBBER BOOTS, AND RUBBER OR 

NEOPRENE PROTECTIVE GLOVES. AFTER USE OF THE 

SEALANT REMOVER, MAKE SURE TO CLEAN YOUR HANDS 

AND FACE WITH SOAP AND WATER. 

4 Use a small brush to apply sealant remover, Eldorado PR-3133, on the 

sealant that is around the edges of the identification plate (refer to item 10, 

IPL Figure 1, CMM 24-23-62, or Figure 1 of this bulletin, for the location of 

the identification plate). Let the sealant remover remain on for 30 minutes 

minimum to soften the sealant.

CAUTION: USE CARE WHEN REMOVING THE SEALANT TO PREVENT 

DAMAGE TO THE ALUMINUM HOUSING.

5 After the sealant has softened to the extent that it can be easily removed, use 

a plastic scraper to carefully remove the sealant from around the edges of 

the identification plate (10). 

6 Remove the identification plate (10).
Original Issue Date: May 26/14 ERPS39T-24-2

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 - See the Title, First, or Cover Page for more information.

WARNING: USE ISOPROPYL ALCOHOL, 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 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.

7 Use a clean, lint-free cloth, soaked in isopropyl alcohol (ASTM D770), to 

clean the surface where the new identification plate, part number 1701897, 

will be installed.

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

9 Remove the paper backing and install the new identification plate, part 

number 1701897, (refer to item 10, IPL Figure 1, CMM 24-23-62, or 

Figure 1 of this bulletin, for the location to install the new identification plate). 

Press firmly to remove any air pockets.

WARNING: USE SOLVENT-RESISTANT NAMEPLATE SEALANT, OXY-BOND 

109DP, CORRECTLY. THE HARDENER IS CORROSIVE, 

REACTIVE AND FLAMMABLE. THE RESIN IS REACTIVE AND IT 

IS FLAMMABLE. IT CAN HAVE A BAD EFFECT ON YOUR HEALTH 

OR SAFETY. BEFORE YOU USE THE SEALANT, GET THE 

MATERIAL SAFETY DATA SHEET FROM THE MANUFACTURER 

OR SUPPLIER OF THE MATERIAL AND READ IT CAREFULLY. 

READ THE DETAILED WARNING, W0199SE, IN THE WARNING 

REGISTRY 20-00-04. BEFORE YOU USE THE SEALANT, PUT ON 

SAFETY GLASSES OR CHEMICAL-SPLASH GOGGLES AND 

SOLVENT RESISTANT GLOVES. MAKE SURE THAT YOU HAVE 

SUFFICIENT AIRFLOW TO KEEP THE SEALANT FUMES BELOW 

THE MATERIAL SAFETY DATA SHEET LIMIT.

10 Use a small brush to apply solvent-resistant nameplate sealant, Oxy-Bond 

109DP, to the edges of the new identification plate, part number 1701897.

WARNING: PUT ON THERMALLY INSULATED GLOVES AND OTHER 

SUITABLE PROTECTION TO PREVENT BURNS WHEN LOADING 

PARTS INTO A PREHEATED OVEN OR HANDLING HEATED OR 

CHILLED PARTS.

11 Let the adhesive cure for 24 hours at room temperature [75 ±5 degrees 

Fahrenheit (24 ±2 degrees Celsius)] or at 150 degrees Fahrenheit (66 

degrees Celsius) for 30 minutes.
Original Issue Date: May 26/14 ERPS39T-24-2

Page 9

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 - See the Title, First, or Cover Page for more information.

Figure 1

Figure 1

Location of the Warning Plate and the Identification Plate

-ALIGN ARROWS PRIOR TO RETRACTION

-WHEN RAT IS RETRACTED 10 DEGREES:

1: CHECK VISUALLY THAT TURBINE LOCK

 PIN HAS ENTERED ITS SLOT

2: CHECK MANUALLY THAT TURBINE

 ROTATION IS SUCCESSFULLY LOCKED

WARNING

WARNING

IDENTIFICATION

PLATE

WARNING

PLATE

SB-ERPS39T242-116679