# Sikorsky Alert Service Bulletin 76-31-4

Copy: Revision A ("Sikorsky ASB 76-31-4 Rev A"), 40 pages: PDF https://openairdocs.org/files/sha256/23/3b/233b0ce7ee280085f0e921353792b5416b3cf1da117db19e760aa93c03507035; text https://openairdocs.org/service-documents/sikorsky/sb-76-31-4/file/233b0ce7ee28.md. Rights: © Sikorsky. Filed by the FAA in regulations.gov docket FAA-2020-0212; AD 2020-15-17 incorporates this document by reference. Not covered by OpenAirDocs’ CC0 dedication.

## Details

- Manufacturer: [Sikorsky](https://openairdocs.org/service-documents/sikorsky.md)
- Type: Service bulletin (Alert Service Bulletin)
- Number: 76-31-4
- Latest revision known: 76-31-4, Revision A, dated May 30, 2018 (OpenAirDocs)
- Page: https://openairdocs.org/service-documents/sikorsky/sb-76-31-4

## ADs that cite it (1) (OpenAirDocs)

Newest first, with the revision each names, as OpenAirDocs read it from the AD's text.

- [AD 2020-15-17](https://openairdocs.org/ad/2020-15-17.md), effective Sep 9, 2020: Revision A

Also cited in [1 proposed AD](https://openairdocs.org/service-documents/sikorsky/sb-76-31-4/proposed.md).

## Text (40 pages)

Rights: © Sikorsky. Filed by the FAA in regulations.gov docket FAA-2020-0212; AD 2020-15-17 incorporates this document by reference. Not covered by OpenAirDocs’ CC0 dedication. Some pages are OCR from a scan. OCR can misread letters and numbers. Each page's text from the PDF; open the PDF at a page with #page=N.

### Page 1

ATA 
31-60-01 
SOFTWARE 
UPDATE 
S-76® HELICOPTER 
ALERT SERVICE  
BULLETIN 
NOTICE TO ALL PERSONS RECEIVING THIS DOCUMENT: 
WARNING: THIS DOCUMENT, OR AN EMBODIMENT OF IT IN ANY MEDIA, DISCLOSES INFORMATION WHICH IS PROPRIETARY, IS THE PROPERTY OF LOCKHEED MARTIN CORPORATION AND/OR ITS SUBSIDIARIES, IS 
AN UNPUBLISHED WORK PROTECTED UNDER APPLICABLE COPYRIGHT LAWS, AND IS DELIVERED ON THE EXPRESS CONDITION THAT IT IS NOT TO BE USED, DISCLOSED, REPRODUCED, IN WHOLE OR IN PART 
(INCLUDING REPRODUCTION AS A DERIVATIVE WORK), OR USED FOR MANUFACTURE FOR ANYONE OTHER THAN LOCKHEED MARTIN CORPORATION AND/OR ITS SUBSIDIARIES WITHOUT ITS WRITTEN CONSENT, 
AND THAT NO RIGHT IS GRANTED TO DISCLOSE OR SO USE ANY INFORMATION CONTAINED HEREIN. ALL RIGHTS RESERVED. ANY ACT IN VIOLATION OF APPLICABLE LAW MAY RESULT IN CIVIL AND CRIMINAL 
PENALTIES. 
SOFTWARE LICENSE AGREEMENT: BY ACTIVATING, ACCESSING, OR USING THE SOFTWARE AND/OR RELATED DOCUMENTATION ("SOFTWARE"), YOU HEREBY AGREE TO BE BOUND BY THE TERMS AND 
CONDITIONS OF THIS AGREEMENT WITH SIKORSKY AIRCRAFT CORPORATION (“SIKORSKY”) AND THAT YOUR ACTIVATION, ACCESS OR USE OF THE SOFTWARE ("USE") IS SUBJECT TO THE FOLLOWING 
RESTRICTIONS AND LIMITATIONS. YOU MAY NOT USE THE SOFTWARE IF YOU DO NOT AGREE WITH THE TERMS AND CONDITIONS OF THIS AGREEMENT AND THE RESTRICTIONS AND LIMITATIONS ON USE OF THE 
SOFTWARE. THE SOFTWARE AND ALL SOURCE OR OBJECT CODE ASSOCIATED THEREWITH ARE THE INTELLECTUAL PROPERTY OF SIKORSKY. USE OF THE SOFTWARE IS SOLELY PURSUANT TO LICENSE AND NO 
OWNERSHIP RIGHTS IN OR TO SUCH SOFTWARE ARE TRANSFERRED TO YOU. FURTHER, USE OF THE SOFTWARE IS LIMITED SOLELY TO USE IN CONNECTION WITH AND FOR THE PURPOSE OF OPERATING 
AIRCRAFT BEARING THE TAIL NUMBERS SET FORTH BELOW. UNITED STATES COPYRIGHT AND TRADE SECRET LAWS AND INTERNATIONAL TREATY PROVISIONS PROTECT THE SOFTWARE. YOU ACKNOWLEDGE 
AND AGREE THAT THE SOFTWARE INCLUDES PROPRIETARY INFORMATION, TRADE SECRETS, KNOW-HOW AND CONFIDENTIAL INFORMATION, THAT IS THE EXCLUSIVE PROPERTY OF SIKORSKY. YOU FURTHER 
AGREE THAT, WITHOUT THE PRIOR WRITTEN CONSENT OF SIKORSKY, YOU WILL NOT GRANT ACCESS TO THE SOFTWARE TO ANY PERSONS OR ENTITIES EXCEPT FOR YOUR EMPLOYEES AND AGENTS WHO HAVE 
A BUSINESS NEED TO HAVE SUCH ACCESS AND WHO ARE OBLIGATED TO MAINTAIN THE CONFIDENTIALITY THEREOF. YOU AGREE THAT YOU WILL NOT: (A) DISTRIBUTE, COPY, DISASSEMBLE, DECOMPILE, 
REVERSE ENGINEER, MODIFY, ADAPT OR CREATE DERIVATIVE WORKS OF THE SOFTWARE; (B) RECONFIGURE, TRANSFER OR ACTIVATE THE SOFTWARE FOR USE IN CONNECTION WITH ANY OTHER AIRCRAFT; (C) 
ALLOW OR ASSIST ANY OTHER PERSON IN ANY OF THE FOREGOING ACTS. ANY ATTEMPT TO DO SO IS A VIOLATION OF THE LEGAL RIGHTS OF SIKORSKY. THE SOFTWARE CONTAINS TECHNOLOGICAL MEASURES 
THAT RESTRICT ACCESS TO THE SOFTWARE. YOU ARE NOT AUTHORIZED TO ACCESS THE SOFTWARE WITHOUT THE EXPRESS PERMISSION OF SIKORSKY. ANY ATTEMPT TO CIRCUMVENT SUCH TECHNOLOGICAL 
MEASURES IS STRICTLY PROHIBITED UNDER THE U.S. COPYRIGHT ACT, 17 U.S.C. 101, ET SEQ, AND OTHER LAWS AND MAY SUBJECT YOU TO CIVIL AND CRIMINAL PENALTIES. USE OF CERTAIN FEATURES OF THE 
SOFTWARE REQUIRE ACTIVATION MEASURES THAT ARE TRADE SECRETS OF SIKORSKY. YOU MUST HAVE THESE ACTIVATION MEASURES PERFORMED BY ONLY SIKORSKY OR ITS AUTHORIZED REPRESENTATIVE. 
OTHERWISE, YOU DO NOT HAVE A RIGHT TO USE THESE SOFTWARE FEATURES. YOU AGREE THAT YOU WILL NOT ATTEMPT TO ACQUIRE, DISCLOSE, OR USE THE ACTIVATION MEASURES. USE OF SUCH 
SOFTWARE FEATURES WITHOUT ACTIVATION MEASURES PERFORMED BY SIKORSKY OR ITS AUTHORIZED REPRESENTATIVE IS AN UNAUTHORIZED USE AND CONSTITUTES A MATERIAL BREACH OF THIS 
AGREEMENT AND APPLICABLE LAW. 
S-76® IS A REGISTERED TRADEMARK OF SIKORSKY AIRCRAFT CORPORATION. 
ASB 76-31-4 
May 17/18 
Revision A ▪ May 30/18 
SUBJECT: INDICATING/RECORDING SYSTEMS – Remote Data Acquisition Unit (RDAU) – One-Time 
Software Update 
Section 1. P LANNING INFORMATION 
A. Effectivity S- 76C+/C++ model helicopters with serial numbers 760471 through 760822, 
equipped with RDAU (76450-01098-107). 
B. Purpose To update the RDAU software to prevent erroneous Caution Advisory System 
(CAS) messages and parameter indications due to degraded internal power 
supply. 
 
Sikorsky Aircraft Corporation 
6900 Main Street P.O. Box 9729 
Stratford, Connecticut 06615-9129 
(203) 386-4000 
 
 
  Page 1 of 32 
WARNING ‒ This document contains technical data subject to the EAR. Authorization is required prior to providing 
this technical data to any company, entity, person, or destination. EAR Export Classification: ECCN EAR99

### Page 2

S-76 ALERT ASB 76-31-4 
SERVICE BULLETIN Revision A ▪ May 30/18 
ATA 
31-60-01 
SOFTWARE 
UPDATE 
Section 1. P LANNING lNFORMATION (Continued) 
C. Background An update to the RDAU software was developed that monitors the status of the 
power supply and will shut down affected channels if degraded power supply is 
detected. 
D. Description Helicopter is prepared for maintenance. RDAU software is updated. RDAU is re- 
  identified. Helicopter is returned to service.  
E. Compliance Compliance is essential. The software update outlined herein is to be 
accomplished no later than June 30, 2019. 
F. Approval The design change specified by this document is FAA approved in accordance 
with the applicable requirements of United States Federal Aviation Regulations 14 
CFR Part 29. 
G. Manpower (Estimated) 
Task No. of Men No. of Hours Man-Hours* 
Removal of electrical compartment access 
cover 
1 0.10 0.10 
Installation of software onto RDAU 1 2.00 2.00 
Re-identification of RDAU 1 0.10 0.10 
Installation of electrical compartment 
access cover 
1 0.10 0.10 
Total Man-Hours   2.30 
*Estimate does not include time required to prepare helicopter or return it to flight status.  
H. Tooling 
Refer to Parker Service Bulletin 367-111-77-003, dated January 4, 2018. 
Qty Nomenclature Part No. Source 
1 Roller Commercially available or equivalent  (1) 
1 Personal Computer-Pentium 4, 
1G or better, with Windows 7 or 
Windows 10 (64 bit installed) 
Commercially available or equivalent (2) 
1 Thunderlinx1000 USB To Serial 
Adapter 
THX1000 (2) 
1 Remote Signal Processing Unit 
(RSPU) Maintenance Interface 
Harness (Programming Cable to 
RDAU) 
199-914-001 (2)(3) 
1 Software CD with the following 
folders: 
553-096-008 (2) 
 
 
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### Page 3

ASB 76-31-4 S-76 ALERT 
Revision A ▪ May 30/18 SERVICE BULLETIN
ATA 
31-60-01 
SOFTWARE 
UPDATE 
Section 1. P LANNING lNFORMATION (Continued) 
Qty Nomenclature Part No. Source 
555-096 -009 Rev B 
HOST Software for the S76 
RDAU 
555-096-010 Rev B 
EPP Software for the S76 
RDAU 
555-096 -003 Rev D FUEL 
Software for the S76 RDAU 
555-096-004 Rev A BOOT 
software for the S76 RDAU 
(4) 
1 Emulator Program Accuterm 7 (standard edition) (2) 
(1) Available through normal supply channels. 
(2) C ontact local Field Service Representative (FSR) for details required to accomplish 
update. These tools are kitted and available via kit No. 17076A88P001-001 for FSR use. 
(3) Refer to Figure 1 for wiring diagram of RSPU maintenance interface harness for local  
fabrication. 
(4) 555-096-004 Rev A BOOT software has not been updated as part of this software update 
and does not need not be uploaded to the RDAU. 
I. Weight and Balance 
Not affected. 
J. Electrical Load Data 
Not affected. 
K. Software Load Data 
Refer to Parker Service Bulletin 367-111-77-003, dated January 4, 2018. 
L. References 
None. 
M. Publications Affected 
(1) Temporary Revision No. 31-07 against Illustrated Parts Catalog, SA 4047-76C-4, Figure 
31-60-00-1 is released concurrently with this ASB. 
Page 3
 
This Document Contains Technical Data Controlled by the EAR. See WARNING and classifications on first page.

### Page 4

S-76 ALERT ASB 76-31-4 
SERVICE BULLETIN Revision A ▪ May 30/18 
ATA 
31-60-01 
SOFTWARE 
UPDATE 
Section 1. PLANNING lNFORMATION (Continued) 
(2) Temporary Revision No. 39-04 against Illustrated Parts Catalog, SA 4047-76C-4, Figure 
39-10-01-3 is released concurrently with this ASB. 
N. Attachment 
Parker Service Bulletin 367-111-77-003, dated January 4, 2018. 
Section 2. M ATERIAL INFORMATION 
A. Basis for Material Data 
Per helicopter. 
B. Bill of Material 
New Part No. Qty Nomenclature Old Part No. Instructions/ 
Disposition 
76070-60084-012 REF M/K, RDAU  (1) 
  Consisting of:   
696-863-007 1 Identification Plate  696-863-002 (2)(3) 
696-493-001 1 Modification Label  696-493-001 (2)(3)(4) 
(1) RDAU modification kit (76070-60084-012) is listed for reference only, and is not a 
procurable item.  
(2) I dentification plate (696-863-007) and modification label (696-493-001) are available at no 
cost until June 30, 2019. Parts shall be available after June 30, 2019 at standard Sikorsky 
Commercial Inc. (SCI) rates. For part availability and lead time requirements contact your 
Customer Service Representative at SCI. Submit a no-cost purchase order referencing this 
ASB number and the helicopter serial number(s) on which these parts will be used. This 
will allow SCI and the operator to track shipment and receipt of parts. Orders will be 
accepted by letter, telephone, or through the SCI website: 
https://customerportal.sikorsky.com. For prompt shipment, reference address of each 
shipping destination. Direct your order to: 
Sikorsky Aircraft Corporation 
Commercial Systems and Services 
Mailstop K100 
124 Quarry Road 
Trumbull, CT 06611 U.S.A. 
Attn: Account Service Manager 
Telephone: (203) 416-4000 
33TU33TU33TUhttps://customerportal.sikorsky.comUUU33T33T33  
 
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### Page 5

ASB 76-31-4 S-76 ALERT 
Revision A ▪ May 30/18 SERVICE BULLETIN 
ATA 
31-60-01 
SOFTWARE 
UPDATE 
Section 2. M ATERIAL INFORMATION (Continued) 
(3) Sikorsky advises adherence to Shelf Life Expiration Date (SLED) provided on packaging. 
The SLED is due in part to 3M adhesive tape on labels. If labels are suspected to expire 
prior to the adherence of this ASB, Sikorsky recommends performing Section 3, steps I.(4) 
and/or I.(8) of this ASB. 
(4) If existing modification label states “MOD 0” there is no need to order a new modification 
label. 
C. Consumable Material 
Qty Nomenclature Part No. Source 
A/R Acetone ASTM-D329 or equivalent (1) 
A/R Cheesecloth CCC-C-440 or equivalent (1) 
A/R Isopropyl Alcohol TT-I-735 or equivalent (1) 
A/R Adhesive cleaner 3M General Purpose Adhesive 
Cleaner or equivalent 
(1) 
A/R Acrylic Adhesive 3M High Performance Acrylic 
Adhesive 200MP or equivalent 
(1) 
    
(1) Available through normal supply channels. 
Section 3. A CCOMPLISHMENT INSTRUCTIONS 
A. Define COMM Port as follows: 
(1) Turn on laptop.  
(2) Attach Thunderlinx1000 USB to Serial Adapter (THX1000) to laptop USB port. 
(3) Select START MENU. 
(4) In the search Windows box, type CONTROL PANEL. 
(5) Select DEVICES and PRINTERS. 
(6) In UNSPECIFIED DEVICES area, select UART DEVICE. 
(7) Select HARDWARE tab. 
(8) Record COMM PORT number. 
B. Load RDAU software to laptop as follows: 
(1) Transfer RDAU software PN 553-096-008 to laptop desktop from www.sikorsy360.com or 
software CD (553-096-008). 
 
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### Page 6

S-76 ALERT ASB 76-31-4 
SERVICE BULLETIN Revision A ▪ May 30/18 
ATA 
31-60-01 
SOFTWARE 
UPDATE 
Section 3. ACCOMPLISHMENT INSTRUCTIONS (Continued) 
(2) Confirm that folders identified in Section 1 Planning Information are present.  
C. Prepare helicopter for modification: 
 
 
(1) Turn off all helicopter electrical and hydraulic power. 
(2) Engage rotor brake. 
(3) Remove electrical compartment access panel from aft bulkhead in baggage compartment.  
D. Update RDAU software as follows: 
(1) Connect laptop with Accuterm 7 (standard edition) software to RDAU using RSPU 
maintenance interface harness (199-914-001). (Refer to Figure 2).  
(2) Set RSPU maintenance interface harness (199-914-001) switches as follows (Refer to 
Figure 3): 
S1 to PGM ENB 
S2 to DH ENB 
S3 to RS232 WRAP-BACK 
(3) Double-click Accuterm 7 desktop icon.  
(4) When Accuterm 7 has completed start up, select “File”, then click “New” to create a new 
session. 
(5) Select “Serial Port” from “Connection Type” drop down menu, then click “Next”. (Refer to 
Figure 4). 
NOTE: COMM port defined and recorded in Section A, “Define COMM Port”. 
(6) Select recorded COMM as the “Serial Port”, then click “Next”. (Refer to Figure 5). 
(7) Set the following parameters, then click “Next” (Refer to Figure 6):  
“Baud rate” to 38400  
 “Data bits” to 8  
“Stop bits” to 1  
“Parity” to “Odd”  
TO PREVENT ELECTRICAL SHOCK OF PERSONNEL OR 
POSSIBLE DAMAGE TO HELICOPTER COMPONENTS, MAKE 
SURE TO TURN OFF ALL ELECTRICAL POWER. 
 
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### Page 7

ASB 76-31-4 S-76 ALERT 
Revision A ▪ May 30/18 SERVICE BULLETIN 
ATA 
31-60-01 
SOFTWARE 
UPDATE 
Section 3. ACCOMPLISHMENT INSTRUCTIONS (Continued) 
“Handshake” to “None” 
Set “Terminal Type” to “TTY” then click “Finish”. (Refer to Figure 7). 
(8) Select “Tools”, then click “Settings” in the options at the top of the page.  
(9) Select the “Connection” category and set the “Echo (duplex)” to “local echo (half duplex)”, 
then click “Apply”. (Refer to Figure 8). 
(10) Select the “File Transfer” category and set the following parameters in the “ASCII 
OPTIONS” (Refer to Figure 9): 
“End-of-line” to “CR”  
“Interline delay” to 30  
(11) Click “Apply” then “OK”. 
NOTE: Configuration settings can be saved for future programming by selecting “File” then 
“Save”. Enter desired name and select location prior to pressing “Save”. 
E. Perform software upload as follows:  
(1) Turn on EXT PWR.  
(2) Pull out the following circuit breakers:  
(a) DC ESS BUS  
PLT IIDS PRI 
CTR IIDS PRI 
CPLT IIDS PRI 
IIDS HTR CTR 
IIDS HTR PLT 
PLT IIDS CONT 
CTR IIDS CONT  
(b) NO. 1 DC PRI 
CPLT IIDS HTR  
(c) NO. 2 DC PRI  
CPLT IIDS CONT 
 
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### Page 8

S-76 ALERT ASB 76-31-4 
SERVICE BULLETIN Revision A ▪ May 30/18 
ATA 
31-60-01 
SOFTWARE 
UPDATE 
Section 3. ACCOMPLISHMENT INSTRUCTIONS (Continued) 
(3) Pull out PLT IIDS SEC (NO. 2 DC PRI bus). Wait at least five (5) seconds.  
(4) Push in PLT IIDS SEC (NO. 2 DC PRI bus).  
(5) Pull out CPLT IIDS SEC (NO. 2 DC PRI bus). Wait at least five (5) seconds. 
(6) Push in CPLT IIDS SEC (NO. 2 DC PRI bus).  
(7) Pull out CTR IIDS SEC (NO. 2 DC PRI bus). Wait at least five (5) seconds. 
(8) Push in CTR IIDS SEC (NO. 2 DC PRI bus).  
(9) Check IIDS display units. All should be at start up page with the software revision to the 
HOST, ENGINE and FUEL set to dashes. (Refer to Figure 10). 
(10) Set S3 switch on RSPU maintenance interface harness (199-914-001) to TRANSMIT.  
F. Program host Operational Flight Program (OFP) as follows:  
(1) Select “Tools”, “Upload”, “Browse”, “555-096-009 Rev. B”. (Refer to Figure 11). 
(2) Select “SHT1.CHA” file and click “Open”. (Refer to Figure 12). 
(3) Click on “Upload”. Wait for the file to finish uploading then click “OK”.   
(4) Wait for the message to be displayed as seen in Figure 13 and below:  
“HOST OFP FILE 1 IS DOWNLOADED SUCCESSFULLY, SEND FILE 2:” 
“PROC = 4, DEVICE = 0” 
(a) If the above is verified then the software is loaded correctly. 
(5) Select “Tools”, “Upload”, “Browse”, “555-096-009 Rev. B”.  
(6) Select “SHT2.CHA” file and click “Open”. 
(7) Click “Upload”. Wait for file to finish uploading and click “OK”.  
(8) Wait for the following message to be displayed as seen in Figure 14, and below:  
“HOST OFP FILE 1 IS DOWNLOADED SUCCESSFULLY, SEND FILE 2:” 
“PROC = 4, DEVICE = 0” 
 “OFP IS DOWNLOADED SUCCESSFULLY:” 
“PART = 555096009” 
 “VER = 2A44” 
 
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### Page 9

ASB 76-31-4 S-76 ALERT 
Revision A ▪ May 30/18 SERVICE BULLETIN 
ATA 
31-60-01 
SOFTWARE 
UPDATE 
Section 3. ACCOMPLISHMENT INSTRUCTIONS (Continued) 
“CHECKSUM = 733DAB02” 
“PROC = 4, DEVICE = 0”  
(a) If the above is verified then the software is loaded correctly. 
(9) Select “Tools”, “Upload”, “Browse”, “555-096-009 Rev. B”.  
(10) Select “SHT1.CHB” file and click “Open”. 
(11) Click on “Upload”. Wait for the file to finish uploading then click “OK”.  
(12) Wait for the following message to be displayed: 
“HOST OFP FILE 1 IS DOWNLOADED SUCCESSFULLY, SEND FILE 2:” 
 “PROC = 8, DEVICE = 0”  
(a) If the above is verified then the software is loaded correctly.  
(13) Select “Tools”, “Upload”, “Browse”, “555-096-009 Rev. B”.  
(14) Select “SHT2.CHB” file and click “Open”. 
(15) Click on “Upload”. Wait for the file to finish uploading then click “OK”.  
(16) Wait for the following message to be displayed:  
“OFP IS DOWNLOADED SUCCESSFULLY:”  
“PART = 555096009”  
“VER = 2A44”  
“CHECKSUM = 733DAB02”  
“PROC = 8, DEVICE = 0”  
(a) If the above is verified then the software is loaded correctly. 
(17) Select “Tools”, “Upload”, “Browse”, “555-096-009 Rev. B”.  
(18) Select “SHT1.CHC” file and click “Open” 
(19) Click on “Upload”. Wait for the file to finish uploading then click “OK”.  
(20) Wait for the following message to be displayed: 
“HOST OFP FILE 1 IS DOWNLOADED SUCCESSFULLY, SEND FILE 2:” 
 
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### Page 10

S-76 ALERT ASB 76-31-4 
SERVICE BULLETIN Revision A ▪ May 30/18 
ATA 
31-60-01 
SOFTWARE 
UPDATE 
Section 3. ACCOMPLISHMENT INSTRUCTIONS (Continued) 
“PROC = C, DEVICE = 0”  
(a) If the above is verified then the software is loaded correctly.  
(21) Select “Tools”, “Upload”, “Browse”, “555-096-009 Rev. B”.  
(22) Select “SHT2.CHC” file and click “Open”. 
(23) Click on “Upload”. Wait for the file to finish uploading then click “OK”.  
(24) Wait for the following message to be displayed: 
“OFP IS DOWNLOADED SUCCESSFULLY:”  
“PART = 555096009”  
“VER = 2A44”  
“CHECKSUM = 733DAB02”  
“PROC = C, DEVICE = 0”  
(a) If the above is verified then the software is loaded correctly.  
G. Program fuel OFP as follows:   
(1) Select “Tools”, “Upload”, “Browse”, “555-096-003 Rev. D”.  
(2) Select “SFUEL.CHA” file and click “Open”. 
(3) Click on “Upload”. Wait for the file to finish uploading then click “OK”.  
(4) Wait for the following message to be displayed: 
“OFP IS DOWNLOADED SUCCESSFULLY:” 
“PART = 555096003” 
“VER = 2A12” 
“CHECKSUM = AD595737” 
“PROC = 6, DEVICE = 0” 
(a) If the above is verified then the software is loaded correctly.  
(5) Select “Tools”, “Upload”, “Browse”, “555-096-003 Rev. D”.  
(6) Select “SFUEL.CHB” file and click “Open”.  
 
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### Page 11

ASB 76-31-4 S-76 ALERT 
Revision A ▪ May 30/18 SERVICE BULLETIN 
ATA 
31-60-01 
SOFTWARE 
UPDATE 
Section 3. ACCOMPLISHMENT INSTRUCTIONS (Continued) 
(7) Click on “Upload”. Wait for the file to finish uploading then click “OK”.  
(8) Wait for the following message to be displayed:  
“OFP IS DOWNLOADED SUCCESSFULLY:”  
“PART = 555096003” 
“VER = 2A12”  
“CHECKSUM = AD595737”  
“PROC = A, DEVICE =0” 
(a) If the above is verified then the software is loaded correctly.  
(9) Select “Tools”, “Upload”, “Browse”, “555-096-003 Rev. D”.  
(10) Select “SFUEL.CHC” file and click “Open”.  
(11) Click on “Upload”. Wait for the file to finish uploading then click “OK”.  
(12) Wait for the following message to be displayed:  
“OFP IS DOWNLOADED SUCCESSFULLY:”  
“PART = 555096003” 
“VER = 2A12”  
“CHECKSUM = AD595737“ 
“PROC = E, DEVICE = 0” 
(a) If the above is verified then the software is loaded correctly.  
H. Program EPP OFP as follows: 
(1) Select “Tools”, “Upload”, “Browse”, “555-096-010 Rev. B”.  
(2) Select “SEPP.CHA” file and click “Open”. 
(3) Click on “Upload”. Wait for the file to finish uploading then click “OK”. 
(4) Wait for the following message to be displayed: 
“OFP IS DOWNLOADED SUCCESSFULLY:” 
“PART = 555096010” 
 
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### Page 12

S-76 ALERT ASB 76-31-4 
SERVICE BULLETIN Revision A ▪ May 30/18 
ATA 
31-60-01 
SOFTWARE 
UPDATE 
Section 3. ACCOMPLISHMENT INSTRUCTIONS (Continued) 
“VER = 3A14” 
“CHECKSUM = 2D155FA6” 
“PROC = 5, DEVICE = 0” 
(a) If the above is verified then the software is loaded correctly.  
(5) Select “Tools”, “Upload”, “Browse”, “555-096-010 Rev. B”.  
(6) Select “SEPP.CHB” file and click “Open”.  
(7) Click on “Upload”. Wait for the file to finish uploading then click “OK”.  
(8) Wait for the following message to be displayed:  
“OFP IS DOWNLOADED SUCCESSFULLY:”  
“PART = 555096010” 
“VER = 3A14” 
“CHECKSUM = 2D155FA6” 
“PROC = 9, DEVICE =0” 
(a) If the above is verified then the software is loaded correctly.  
(9) Select “Tools”, “Upload”, “Browse”, “555-096-010 Rev. B”.  
(10) Select “SEPP.CHC” file and click “Open”.  
(11) Click on “Upload”. Wait for the file to finish uploading then click “OK”.  
(12) Wait for the following message to be displayed:  
“OFP IS DOWNLOADED SUCCESSFULLY:”  
“PART = 555096010” 
“VER = 3A14” 
“CHECKSUM = 2D155FA6” 
 “PROC = D, DEVICE = 0”  
(a) If the above is verified then the software is loaded correctly. 
(13) Turn off EXT PWR.  
 
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### Page 13

ASB 76-31-4 S-76 ALERT 
Revision A ▪ May 30/18 SERVICE BULLETIN 
ATA 
31-60-01 
SOFTWARE 
UPDATE 
Section 3. ACCOMPLISHMENT INSTRUCTIONS (Continued) 
(14) Set RSPU maintenance interface harness (199-914-001) switches as follows: 
S1 to OFF 
S2 to OFF 
(15) Turn on EXT PWR. 
(16) IIDS display units shall display on the top row the following RDAU version numbers for the 
software, as shown in Figure 16. 
NOTE: Disregard DU S/W VER DATA, as they are not modified by this service 
bulletin.  
(a) If this is verified the programming is complete for the RDAU.  
(b) If the above is not verified, then the RDAU shall be returned to Parker Fluid Systems 
Division (FSD). 
(17) Push in the following circuit breakers:  
(a) DC ESS BUS 
PLT IIDS PRI 
CTR IIDS PRI 
CPLT IIDS PRI 
IIDS HTR CTR 
IIDS HTR PLT 
PLT IIDS CONT 
CTR IIDS CONT 
(b) NO.1 DC PRI 
CPLT IIDS HTR 
(c) NO. 2 DC PRI 
CPLT IIDS CONT 
(18) Turn off EXT PWR. 
(19) Disconnect laptop and RSPU maintenance interface harness (199-914-001) from 
helicopter. 
 
Page 13 
This Document Contains Technical Data Controlled by the EAR. See WARNING and classifications on first page.

### Page 14

S-76 ALERT ASB 76-31-4 
SERVICE BULLETIN Revision A ▪ May 30/18 
ATA 
31-60-01 
SOFTWARE 
UPDATE 
Section 3. ACCOMPLISHMENT INSTRUCTIONS (Continued) 
I. Re-identify RDAU 76450-01098-107 to 76450-01098-112 using new identification plate (696-
863-007) and modification label (696-493-001) as follows (Refer to Figure 17): 
NOTE: If existing modification label (696-493-001) states “MOD 0” there is no need to 
install a new modification label (696-493-001). 
(1) Remove existing identification plate and modification label, if applicable.  
(2) Clean bonding surface thoroughly with cheesecloth (CCC-C-440 or equivalent) moistened 
with isopropyl alcohol (TT-I-735 or equivalent) or acetone (ASTM-D329 or equivalent). 
(3) Using a rubber stamp and indelible ink, mark identification plate (696-863-007) with serial 
number found on removed identification plate. 
NOTE: Sikorsky advises adherence of SLED provided on packaging. The SLED is due in 
part to 3M adhesive tape on labels. If identification plate adhesive is expired prior 
to compliance of this ASB, it is recommended to replace identification plate 
adhesive. 
(4) If adhesive on identification plate has expired and need replacing, do the following:  
(a) Using adhesive cleaner (3M General Purpose Adhesive Cleaner or equivalent) , 
remove existing adhesive from identification plate (696-863-007). 
(b) Using isopropyl alcohol (TT-I-735 or equivalent) clean identification plate (696-863-
007). 
(c) Apply acrylic adhesive (3M High Performance Acrylic Adhesive 200MP or 
equivalent) to surface of identification plate (696-863-007). 
(5) If adhesive on identification plate (696-863-007) has not expired and does not need 
replacing, remove adhesive backing from identification plate (696-863-007). 
(6) In stall identification plate (696-863-007) onto RDAU (76450-01098-112). 
(7) Using roller (commercially available or equivalent) apply firm pressure to identification plate 
(696-863-007) to obtain intimate contact of adhesive to RDAU (76450-01098-112). 
NOTE: Sikorsky advises adherence of SLED provided on packaging. The SLED is due in 
part to 3M adhesive tape on labels. If identification plate adhesive is expired prior 
to compliance of this ASB, it is recommended to replace identification plate 
adhesive 
(8) If adhesive on modification label (696-493-001) has expired and need replacing, do the 
following: 
(a) Using adhesive cleaner (3M General Purpose Adhesive Cleaner or equivalent) 
remove existing adhesive from modification label (696-493-001). 
 
 
Page 14  
This Document Contains Technical Data Controlled by the EAR. See WARNING and classifications on first page.

### Page 15

ASB 76-31-4 S-76 ALERT 
Revision A ▪ May 30/18 SERVICE BULLETIN 
ATA 
31-60-01 
SOFTWARE 
UPDATE 
Section 3. ACCOMPLISHMENT INSTRUCTIONS (Continued) 
(b) Using isopropyl alcohol (TT-I-735 or equivalent) clean modification label (696-493-
001). 
(c) Apply acrylic adhesive (3M High Performance Acrylic Adhesive 200MP or 
equivalent) to surface of modification label (696-493-001). 
(9) If adhesive on modification label (696-493-001) has not expired and does not need 
replacing, remove adhesive backing from modification label (696-493-001). 
(10) In stall modification label (696-493-001) onto RDAU (76450-01098-112), if applicable. 
(11) Using roller (commercially available or equivalent) apply firm pressure to modification label 
(696-493-001) to obtain intimate contact of adhesive to RDAU (76450-01098-112). 
J. Install electrical compartment access panel on baggage compartment aft bulkhead. 
K. Return helicopter to service. 
  
 
Page 15 
This Document Contains Technical Data Controlled by the EAR. See WARNING and classifications on first page.

### Page 16 (OCR)

S-76 ALERT  ASB 76-31-4
SERVICE BULLETIN  Revision A - May 30/18
Section 3. ACCOMPLISHMENT INSTRUCTIONS (Continued)
TO RDAU →
O 1 CHASSIS GND
PRG_ENABLE
• 2 PRG_ENAB
DH_ENABLE  S2
-• 3 DH_ENAB
- TO PC
• WRAP
10  S3  • 7 RXD +
•RXD 2 O  n  XMIT
- TXD 3
O 8 TXD
GND 5
-O 6.9 GND
199-914-001  CONNECTOR P / N: MS27473E10B13S  STRAIN RELIEF P/N: M85D49 / 49210W
CONNECTOR P / N: 171DE9S
BACKSHELL P/N: 17-310-1
ALL WIRING 20AWG
TD4426
PROGRAMMING CABLE WIRING HARNESS
FIGURE 1
ATA  SOFTWARE
Page 16  31-60-01  UPDATE
This Document Contains Technical Data Controlled by the EAR. See WARNING and classifications on first page.

### Page 17

ASB 76-31-4 S-76 ALERT 
Revision A ▪ May 30/18 SERVICE BULLETIN 
ATA 
31-60-01 
SOFTWARE 
UPDATE 
Section 3. A CCOMPLISHMENT INSTRUCTIONS (Continued) 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
LAPTOP TO RDAU INTERFACE 
FIGURE 2 
  
 
Page 17 
This Document Contains Technical Data Controlled by the EAR. See WARNING and classifications on first page.

### Page 18

S-76 ALERT ASB 76-31-4 
SERVICE BULLETIN Revision A ▪ May 30/18 
ATA 
31-60-01 
SOFTWARE 
UPDATE 
Section 3. A CCOMPLISHMENT INSTRUCTIONS (Continued) 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
RSPU MAINTENANCE INTERFACE HARNESS 
FIGURE 3 
  
 
Page 18  
This Document Contains Technical Data Controlled by the EAR. See WARNING and classifications on first page.

### Page 19 (OCR)

ASB 76-31-4  S-76 ALERT
Revision A • May 30/18  SERVICE BULLETIN
Section 3. ACCOMPLISHMENT INSTRUCTIONS (Continued)
A AccuTerm 7
File Edit View Tools Mutvalue Window
accuer connecton wizara - connecuon ontons
Please select the desired type of connection from this
Most terminal sessions use Telnet over a local network (or
the Internet) to connect to the host computer. For
secure network connections, choose Secure Shell (if your
host supports this protocol). If your PC is directly
connected to the host computer using a 9 or 25 pin
plug, select Serial Port. If you need to dial-up from your
PC direcuy to a modem autached to the nost computer
select Modem.
Connection type:  Serial Port
the wizard and enter settings directly Secure Shell  At any time, you can click the iSessi Telnet  e future, do not
you never want to use the wizard to SSL/Telnet  his wizard
Session settings..  < Back  Einish
Create a new session or open an existing one
ACCUTERM 7  - Inbox - mario.a..  ) Skype for Busin.  Kronauer, BRA..  A AccuTerm 7  Pa Presentation ...  OR 7/19/2017  1:57 PM
TD4429
CONNECTION OPTIONS WINDOW
FIGURE 4
SOFTWARE  ATA
UPDATE  31-60-01  Page 19
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### Page 20 (OCR)

S-76 ALERT  ASB 76-31-4
SERVICE BULLETIN  Revision A • May 30/18
Section 3. ACCOMPLISHMENT INSTRUCTIONS (Continued)
A AccuTerm 7
File Edit View Tools MultiValue Window Help
ecton Wizard - Port Selection
Please select the serial port that is connected to your
nost computer.
Most PC's have two serial ports. A PC serail port is normally a
"D" shaped 9-pin male connector. If you can't determine
which port is connected to your host computer, you can try
all of the avalable ports, or ask your system administrator.
Serial port:
Session settings...  Cancel  Next >  Einish
* Create a new session or open an existing one
Skype for Bus... Kronauer, BRA..  A AccuTerm 7  Pa Presentation -
TD4430
SA
PORT SELECTION WINDOW
FIGURE 5
ATA  SOFTWARE
Page 20  31-60-01  UPDATE
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### Page 21 (OCR)

ASB 76-31-4  S-76 ALERT
Revision A • May 30/18  SERVICE BULLETIN
Section 3. ACCOMPLISHMENT INSTRUCTIONS (Continued)
A AccuTerm 7
File Edit View Tools MultiValue Window Help
1 - Baud Rate Selection
Please select the desired port settings.
The Baud Rate is the speed that your PC uses to talk to the
host computer. Data Bits, Stop Bits and Parity describe the
data format used between the computers, and Handshake
controls the flow of data from one computer to the other. The
port settings on your PC and the host computer must match
for a reliable connection.
Baud rate:  38400
Data bits:  Stop bits: 1
Parity:
Handshake:  one
Cancel  < Back  Next >  Einish
- Create a new session or open an existing one
S Skype for Bu.  Kronauer, B..  AccuTerm 7  I AccuTerm...  Pa Presentation...  | = CR 719201
TD4431
BAUD RATE SELECTION WINDOW
FIGURE 6
SOFTWARE  ATA
UPDATE  31-60-01  Page 21
This Document Contains Technical Data Controlled by the EAR. See WARNING and classifications on first page.

### Page 22 (OCR)

S-76 ALERT  ASB 76-31-4
SERVICE BULLETIN  Revision A • May 30/18
Section 3. ACCOMPLISHMENT INSTRUCTIONS (Continued)
A AccuTerm 7
File Edit View Tools Multvalue window Help
AccuTerm Connection Wizard - Terminal Type
I that's left is to choose the type of terminal yo
ant to emulate from the list below. Then click on th
Finish button!
Each terminal speaks a different language. In order to get
things working correctly, you need to know what type of
terminal your host computer application is designed to use and
select the corresponding terminal type here. Most Unix
systems use VT220, and most MultiValue systems use ADDS
Viewpoint A2 Enhanced (Wyse 50 and 60 are also common). If
you choose the wrong type, your menus and screens may
appear scrambled. If this happens, just try a different terminal
type.
Terminal type:
Session settings...  Cancel  Finish
* Create a new session or open an existing one
ACCUTERM 7  Inbox - mario.a.  Skype for Busin..  • Kronauer, BRA.  Pa Presentation .. A AccuTer 7  * CR 7/19/2017
TD4432
TERMINAL TYPE WINDOW
FIGURE 7
ATA  SOFTWARE
Page 22  31-60-01  UPDATE
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### Page 23 (OCR)

ASB 76-31-4  S-76 ALERT
Revision A • May 30/18  SERVICE BULLETIN
Section 3. ACCOMPLISHMENT INSTRUCTIONS (Continued)
^ AccuTerm Z-Irdau Z_19_20171
File Edit Vie AccuTerm Settings
Category:  Connection Settings
General Options
I rdau_7_19  Files & Folders  Connection  Connection type:  Serial port  Connection  settings...  • <
- Telnet
Secure Shell
- Private Key  Connection Options
- SSL/Telnet  Echo (duplex):
Serial Port  local echo (half duplex)
Modem
Terminal  - Screen  • Clear bigh bit of received data
- Colors
• Attribute Colors
• Palette
- Background  • Display connection warnings
• Keyboard
- Font & Character Set  • Sounds  - Close session on disconnect
- Printer
- Screen Print
• Slave Printer
Cipboard
Mouse
File Transter
MultiValue Rules
Windows
Apply
₴ • 1,1,1
_ Start  • ACCUTERM 7  • Inbox - mario.a..  S Skype for Busin..  • Kronauer, BRA...  Po Presentation 1 ..  A AccuTerm 7 - [..  * UP 7/19/2017  2:11 PM
TD4433
CONNECTION SETTINGS
FIGURE 8
SOFTWARE  ATA
UPDATE  31-60-01  Page 23
This Document Contains Technical Data Controlled by the EAR. See WARNING and classifications on first page.

### Page 24 (OCR)

S-76 ALERT  ASB 76-31-4
SERVICE BULLETIN  Revision A - May 30/18
Section 3. ACCOMPLISHMENT INSTRUCTIONS (Continued)
Л AccuTerm Z-Irdau Z_19_20171
File Edit Vie AccuTerm Settings
Category:  General Options  - Fie Transfer Settings
• Files & Folders  - ASCI Options
i rdau_7_19  Connection  nterline delay
- Telnet  30 ÷ mș
Secure Shell
- Private Key
SSL/Telnet  - Kermit Options
Serial Port
10 ÷ sec
- Screen  / Quote eighth bit
Colors  30 -
• Attribute Colors  • Use data compression
• Palette  • Use CBC block check
• Background
Keyboard
- Font & Character Set  - X/Y/Zmodem Options
Sounds  modem timeout:  Zmodem timeout:
10 sec  10 sec  10 sec
• Screen Print
• Slave Printer  Initiate Zmodem downloads automatically
Clipboard
• Mouse  - Defaults
File Transfer  Transfer mode:  • Iext C Binary
• MultiValue Rules
• Windows  Text file encoding
No encoding  • Oyerwrite existing files
Cancel  Apply
8 • 1,1,1
ACCUTERM 7  OC Inbox - mario.a..ù  Skype for Busin.  © Kronauer, BRA..  Pa Presentation 1-.  * CR 7/19/2017  2:16 PM
TD4434
FILE TRANSFER SETTINGS
FIGURE 9
ATA  SOFTWARE
Page 24  31-60-01  UPDATE
This Document Contains Technical Data Controlled by the EAR. See WARNING and classifications on first page.

### Page 25

ASB 76-31-4 S-76 ALERT 
Revision A ▪ May 30/18 SERVICE BULLETIN 
ATA 
31-60-01 
SOFTWARE 
UPDATE 
Section 3. A CCOMPLISHMENT INSTRUCTIONS (Continued) 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
PRE-UPLOAD IIDS DISPLAY UNIT 
FIGURE 10 
  
 
Page 25 
This Document Contains Technical Data Controlled by the EAR. See WARNING and classifications on first page.

### Page 26 (OCR)

S-76 ALERT  ASB 76-31-4
SERVICE BULLETIN  Revision A • May 30/18
Section 3. ACCOMPLISHMENT INSTRUCTIONS (Continued)
Compressed Folder Tools  000008 eV  - • x
File Home  share  Extract  • •
• Pictures
NEMASTER REF DOCT  FLIGHT TESTI  ASB 107
Extract To
+ → • 1 • › Network › sussffOu > shflsvc2eng > S-76 Project 1022 › Mission Systems Integration > S-76 RDAU > Parker Docs > Contents of SW CD 553-096-008 Rev - zip » 553096008 Rev•  & Search 553096008 Rev - P
• Nar  Password... Size  Ratio  Date modified
* Quick acce
11/9/2017 2:09 PM
11/9/20172:09 PM
11/9/2017 2:09 PM
11/9/2017 2:09 PM
TD4491
SELECT FOLDER WINDOW
FIGURE 11
ATA  SOFTWARE
Page 26  31-60-01  UPDATE
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### Page 27 (OCR)

ASB 76-31-4  S-76 ALERT
Revision A • May 30/18  SERVICE BULLETIN
Section 3. ACCOMPLISHMENT INSTRUCTIONS (Continued)
0100:1  Compressed holder Tools  555096009 Rev B
File Home  Share  View  Extract
• Documents
| MASTER REF DOC  FLIGHT TEST  L ASB 10:
ARCHIVE
Extract To
+ → = + I « suffOu > shfisceng > 5:76 Project 1022 › Mission Systems Integration > 576RDAU › Parker Docs › Contents of SW CD 553-096-008 Rev-zip > 553096008 Rev- > 555096009 RevB & [Search 555096009 Rev B P
• Name  Ratio  Date modified
ar Ouick acces
• SHT1.CHA  289 KB 74%  8/1/2017 6:16 PM
289 KB 7478  8/1/2017 6:16 PM
289 KB 7498
ASHTO CHA  289 KB 95%  8/1/2017 6:16 PM
289 KB 9578  8/1/2017 6:16 PM
= ENTERPRISE (SUS:
TD4490
SELECT FILE TO UPLOAD WINDOW
FIGURE 12
SOFTWARE  ATA
UPDATE  31-60-01  Page 27
This Document Contains Technical Data Controlled by the EAR. See WARNING and classifications on first page.

### Page 28 (OCR)

S-76 ALERT  ASB 76-31-4
SERVICE BULLETIN  Revision A • May 30/18
Section 3. ACCOMPLISHMENT INSTRUCTIONS (Continued)
]El AccuTerm 2K2 - [576_STE (1))  -/#|×
2082080405891
HOST OFP FILE 1 IS DOWNLOADED SUCCESSFULLY, SEND FILE 2
Proc=4, Device=0
D 576_STE (1)
g 1,3,1 80,24,1 DEC VT100 bIde by Capture Off a Comg ≥ 38400,0,8,1,0  100O.102  Microsaft Office «53 (8 9:30 AM  TD4492
SUCCESSFUL DOWNLOAD OF SHT1.CHA FILE
FIGURE 13
ATA  SOFTWARE
Page 28  31-60-01  UPDATE
This Document Contains Technical Data Controlled by the EAR. See WARNING and classifications on first page.

### Page 29 (OCR)

ASB 76-31-4  S-76 ALERT
Revision A • May 30/18  SERVICE BULLETIN
Section 3. ACCOMPLISHMENT INSTRUCTIONS (Continued)
El AccuTerm 2K2 - [576_STE (1)]
File EdR Yew Iook Beset Window Help
OFP IS DOWNLOADED SUCCESSFULLY:
PART = 555096009
VER = 2A44
CHECKSUM = 733DAB02
Proc=4, Device=0
it Start e @ @ * [ AccuTerm 2K2 - [576. 3] Document - Microsoft... ]  Microsoft Office * « 03 C: 12:57 PM  TD4493
SUCCESSFUL DOWNLOAD OF SHT1.CHB FILE
FIGURE 14
SOFTWARE  ATA
UPDATE  31-60-01  Page 29
This Document Contains Technical Data Controlled by the EAR. See WARNING and classifications on first page.

### Page 30 (OCR)

S-76 ALERT  ASB 76-31-4
SERVICE BULLETIN  Revision A • May 30/18
Section 3. ACCOMPLISHMENT INSTRUCTIONS (Continued)
Parker  ULL ELECTRONIC SYSTEMS DIVISIDI
COPYRIGHT © 1996, 199
RDAU S/W VERS: 2.44. 3.14 2.12
DU S/W VERS:  2.10 2.11
A/C MODEL:  S-76-C++
POSITION:  CENTER
TEST: PASS
00PO-2
MENU
TD4494
IIDS DISPLAY UNIT WITH SOFTWARE VERSION NUMBERS
FIGURE 15
ATA  SOFTWARE
Page 30  31-60-01  UPDATE
This Document Contains Technical Data Controlled by the EAR. See WARNING and classifications on first page.

### Page 31 (OCR)

ASB 76-31-4  S-76 ALERT
Revision A • May 30/18  SERVICE BULLETIN
Section 3. ACCOMPLISHMENT INSTRUCTIONS (Continued)
REMOVE:
696-863-002
IDENTIFICATION PLATE (1)
INSTALL:
696-863-007
IDENTIFICATION PLATE - 1 REQ'D
J10
STATIC AIR
150 VOLTS
REMOVE:
696-493-001
MODIFICATION LABEL (1)
INSTALL:
696-493-001
NOTE  MODIFICATION LABEL - 1 REQ'D
IF EXISTING MODIFICATION LABEL  (SEE NOTE)
STATES "MOD O" THERE IS NO NEED
TO INSTALL A NEW MODIFICATION  LABEL.  TD4442  SA
IDENTIFICATION PLATE AND MODIFICATION PLATE INSTALLATION
FIGURE 17
SOFTWARE  ATA
UPDATE  31-60-01  Page 31
This Document Contains Technical Data Controlled by the EAR. See WARNING and classifications on first page.

### Page 32

S-76 ALERT ASB 76-31-4 
SERVICE BULLETIN Revision A ▪ May 30/18 
ATA 
31-60-01 
SOFTWARE 
UPDATE 
Section 3. A CCOMPLISHMENT INSTRUCTIONS (Continued) 
L. Record of compliance: 
(1) Make helicopter logbook entries to show compliance with this ASB as follows: 
(a) Make helicopter level logbook entry on form SA7343-15 (Aircraft ASB Release 
Signoff). 
(b) When ASB modifies a component that can be removed from this helicopter: 
1. Make component log card entries on forms SA7343-22 (Aircraft Component 
Log Cards) and SA7343-21 (Component Log Cards), as applicable. 
2. If a component modified by this ASB does not have a log card and the ASB 
does not create one, then annotate compliance on the next higher assembly 
that the component belongs to which does have a log card. 
NOTE: If access to www.Sikorsky360.com is unavailable, complete attached ALERT 
SERVICE BULLETIN COMPLIANCE RECORD CARD and return it to Sikorsky 
Aircraft Corporation. 
(2) Make an appropriate electronic compliance entry in the E-Notification section at 
www.Sikorsky360.com. Refer to User Guide located on the www.Sikorsky360.com/E-
Notification Search page. 
 
Page 32  
This Document Contains Technical Data Controlled by the EAR. See WARNING and classifications on first page.

### Page 33

(Fold over and tape closed) 
SIKORSKY AIRCRAFT CORPORATION 
FACSIMILE NUMBER (817) 762-6715 
EMAIL ADDRESS: product_safety.gr-sik@lmco.com 
ATTENTION: Gr-SIK, Product_Safety 
SIKORSKY AIRCRAFT CORPORATION 
 
(Fold Up to Arrows) 
IMPORTANT NOTICE 
Upon COMPLIANCE with the attached ASB, Sikorsky requests your cooperation 
in completing and returning this ENTIRE PAGE by MAIL, FAX, or scan & 
EMAIL. 
Please fill in the requested information at the bottom of the page, so we may maintain 
proper records documenting the configuration of your aircraft. This information is useful 
when determining configuration and effectivity of issues affecting fielded aircraft. 
This request is in keeping with our policy to assure that our customers receive the latest 
information applicable for the maintenance of your aircraft. Thank you. 
ALERT SERVICE BULLETIN:  ________________  Compliance Record Card 
TITLE:  ___________________________________________________________________  
  ___________________________________________________________________  
  ___________________________________________________________________  
OWNER/OPERATOR:  _____________________________________________________  
SUBMITTED BY:  ___________________________  DATE:  ____________________  
FOLLOWING SERIAL NUMBERS ARE NOT AFFECTED BY THIS ASB 
ASB HAS BEEN COMPLIED WITH ON HELICOPTER SERIAL NUMBERS: 
 ___________   ___________   ___________   ___________   ___________   ___________  
 ___________   ___________   ___________   ___________   ___________   ___________  
                  
No. 76-31-4A 
INDICATING/RECORDING SYSTEMS – Remote Data Acquisition Unit (RDAU) – 
One-Time Software Update 
This Document Contains Technical Data Controlled by the EAR. See WARNING and classifications on first page.

### Page 34

No Postage 
Necessary 
BUSINESS REPLY MAIL 
FIRST-CLASS MAIL PERMIT NO. 432 BRIDGEPORT CT 
POSTAGE WILL BE PAID BY ADDRESSEE 
SIKORSKY AIRCRAFT CORPORATION 
Commercial Systems and Services 
Mailstop K100 
124 QUARRY ROAD 
TRUMBULL, CT 06611 U.S.A.   
ATTENTION:   
Gr-SIK, Product_Safety 
  
Please complete the form on the reverse side and FAX to 
FACSIMILE NUMBER (817) 762-6715 
Or scan and email to: 
EMAIL ADDRESS: product_safety.gr-sik@lmco.com 
or fold and return ENTIRE form to Sikorsky Aircraft Corporation 
This Document Contains Technical Data Controlled by the EAR. See WARNING and classifications on first page.

### Page 35

Customer Support Operations 
SERVICE BULLETIN 
Initial Issue Jan 4, 2018  367-111-77-003 
  Page 1 of 6 
THIS DOCUMENT CONTAINS INFORMATION THAT IS CONFIDENTIAL AND PROPRIETARY TO PARKER-HANNIFIN CORPORATION. THIS DOCUMENT IS FURNISHED ON THE 
UNDERSTANDING THAT THE DOCUMENT AND THE INFORMATION IT CONTAINS WILL NOT BE COPIED OR DISCLOSED TO OTHERS EXCEPT WITH THE WRITTEN CONSENT OF 
PARKER, WILL NOT BE USED FOR ANY PURPOSE OTHER THAN CONDUCTING BUSINESS WITH PARKER, AND WILL BE RETURNED AND ALL FURTHER USE DISCONTINUED 
UPON REQUEST BY PARKER. COPYRIGHT PARKER. YEAR OF COPYRIGHT IS FIRST YEAR INDICATED ON THIS DOCUMENT. ALL RIGHTS RESERVED.  
 
ENGINE INDICATING REMOTE DA TA ACQUISITION UNIT ASSEMBLY 
PARKER PART NUMBER 367-111-002 
SOFTWARE UPGRADE  
1. PLANNING INFORMATION   
A. Effectivity   
This Service Bulletin is applicable to the Parker Hannifin Corporation, Remote Data Acquisition Unit 
(RDAU) Part Number (P/N) 367-111-002, Sikorsky P/N 76450-01098-107.   
B. Concurrent Requirements   
None.   
C. Reason   
 The RDAU P/N 367-111-002 has been updated to 367-111-102 (Sikorsky P/N 76450-01098-
107 updated to 76450-01098-112) to introduce a software change that allows a red fail screen 
to be displayed in flight if an internal power supply is degraded, thus preventing the display of 
misleading information to the pilot.   
 The updated software will now mon itor ±5V and ±15 VDC for degraded voltage level.  If a lost 
or degraded voltage is detected either in Air and /or on Ground, the software will latch a Red 
Box "FAIL" within the same power cycle.  In addition, the Master Caution Trip, CAS Message 
and Audio Alerts for the affected channel will be turned off to prevent nuisance indications to 
the pilot.   
 The following code/design errors were also addressed and corrected as part of this change:   
(a) N1 issue on the C++ Power As surance performance.  N1 Bias number after power 
assurance is 0.0 and is out of range.   
(b) Test Button on IIDS show s RED BOX failure display.   
(c) Start Page Timeout not triggerin g from same logic from side to side.   
(d) Power Assurance page incorrect.  Labe l 300 sent erroneously.   
(e) Fuel Quantity sometimes will drop for no reason.   
(f) Power Assurance Repeat 10 second timer does not reset to 2:45 (2 minutes 45 seconds) 
when N1 goes to 70% or below.   
(g) PO Values from IIDS are not stable upon power up.   
(h) T5 Coefficient Error 100 and 101 fault stored.   
(i) Occasionally RDAU is not saving T5 Coefficients.   
  
WARNING ‒ This document contains technical data subject to the EAR. Authorization is required prior to providing 
this technical data to any company, entity, person, or destination. EAR Export Classification: ECCN EAR99

### Page 36

Customer Support Operations 
SERVICE BULLETIN 
Initial Issue Jan 4, 2018  367-111-77-003 
  Page 2 of 6 
THIS DOCUMENT CONTAINS INFORMATION THAT IS CONFIDENTIAL AND PROPRIETARY TO PARKER-HANNIFIN CORPORATION. THIS DOCUMENT IS FURNISHED ON THE 
UNDERSTANDING THAT THE DOCUMENT AND THE INFORMATION IT CONTAINS WILL NOT BE COPIED OR DISCLOSED TO OTHERS EXCEPT WITH THE WRITTEN CONSENT OF 
PARKER, WILL NOT BE USED FOR ANY PURPOSE OTHER THAN CONDUCTING BUSINESS WITH PARKER, AND WILL BE RETURNED AND ALL FURTHER USE DISCONTINUED 
UPON REQUEST BY PARKER. COPYRIGHT PARKER. YEAR OF COPYRIGHT IS FIRST YEAR INDICATED ON THIS DOCUMENT. ALL RIGHTS RESERVED.  
 
(j) Low rotor Advisory update.  A djust Low NR threshold from 95% to 91.  Inhibit Low NR on 
Ground.   
(k) Power Assurance in flight look up table correction.   
D. Description   
 This Service Bulletin provides  instructions to modify, test, and re-identify the RDAU.  
Modification consists of installing the revised software only, hardware is not affected.   
 After completion of this Service  Bulletin, the RDAU P/N 367-111-002 will be upgraded to P/N 
367-111-102 configuration.   
E. Compliance   
This modification is not mandatory, but is recommended at the earliest practical maintenance period.   
F. Approval   
This Service Bulletin has been reviewed by the appropriate governmental authority, and the repairs 
and modifications herein comply with the applicable Aviation Regulations.   
G. Manpower   
This modification may be accomplished by a crew of one (1) in approximately 2.0 hours.   
H. Weight and Balance   
None.   
I. Electrical Load Data   
Not affected.   
J. Software Accomplishment Summary   
 Load software into RDAU.   
 Verify checksum upon completion.   
 Re-identify RDAU.   
K. References   
 Parker Hannifin, Operators Manual - C+ Model: Pub No. IIDS S-76 PM004 Rev. B, October 4, 
2017.   
 Parker Hannifin, Operators Manual - C++ Model: Pub No. IIDS S-76 PM003 Rev. B, October 4, 
2017.   
  
This Document Contains Technical Data Controlled by the EAR. See WARNING and classifications on first page.

### Page 37

Customer Support Operations 
SERVICE BULLETIN 
Initial Issue Jan 4, 2018  367-111-77-003 
  Page 3 of 6 
THIS DOCUMENT CONTAINS INFORMATION THAT IS CONFIDENTIAL AND PROPRIETARY TO PARKER-HANNIFIN CORPORATION. THIS DOCUMENT IS FURNISHED ON THE 
UNDERSTANDING THAT THE DOCUMENT AND THE INFORMATION IT CONTAINS WILL NOT BE COPIED OR DISCLOSED TO OTHERS EXCEPT WITH THE WRITTEN CONSENT OF 
PARKER, WILL NOT BE USED FOR ANY PURPOSE OTHER THAN CONDUCTING BUSINESS WITH PARKER, AND WILL BE RETURNED AND ALL FURTHER USE DISCONTINUED 
UPON REQUEST BY PARKER. COPYRIGHT PARKER. YEAR OF COPYRIGHT IS FIRST YEAR INDICATED ON THIS DOCUMENT. ALL RIGHTS RESERVED.  
 
L. Other Publications Affected   
None.   
M. Interchangeability and In termixability of Parts   
Parker RDAU, P/N 367-111-002 (Sikorsky P/N 76450-01098-107) is completely interchangeable with 
RDAU P/N 367-111-102 (Sikorsky P/N 76450-01098-112).   
2. MATERIAL INFORMATION   
A. Material - Price and Availability   
RDAU, P/N 367-111-002 (Sikorsky P/N 76450-01098-107) software upgrade is a chargeable upgrade 
to operators, with a delivery time of 30 days from receipt of purchase order at the address below.   
PARKER HANNIFIN CORPORATION AOG HOTLINE (949) 851-4357 
Fluid System Division – Hauppauge  FAX: (631) 434-4706 
300 Marcus Blvd. TECHNICAL FAX HOTLINE: (949) 809-8444 
Hauppauge, NY 11788 TECHNICAL E-MAIL HOTLINE: csoengineering@parker.com 
USA REPAIR STATION NO.: FX1R156K 
B. Industry Support Information   
 Operators are requested to cont act their respective Parker Hannifin Customer Service 
Administrator to schedule implementation of this Service Bulletin.   
 Damage from mishandling and/or a bnormal use, and parts or work required outside the scope 
of this Service Bulletin is subject to time and material charges.   
C. Material Necessary for Each Component   
 Programming procedure.   
Table 1   
TEST ITEM NOMENCLATURE FSD P/N 
S-76 IIDS RDAU 367-111-102 
 Test equipment requirement.   
Table 2   
ITEM DESCRIPTION MODEL MANUFACTURER 
AMLCD Systems Production Test Set 199-382-001 FSD Parker 
RDAU Interface Harness  467-743-001 or 467-743-002 FSD Parker 
Oscilloscope  TDS440A Tektronix 
STE ATP Software (For 367-111-002 
and 367-111-102)  
577-096-012  FSD Parker 
  
This Document Contains Technical Data Controlled by the EAR. See WARNING and classifications on first page.

### Page 38

Customer Support Operations 
SERVICE BULLETIN 
Initial Issue Jan 4, 2018  367-111-77-003 
  Page 4 of 6 
THIS DOCUMENT CONTAINS INFORMATION THAT IS CONFIDENTIAL AND PROPRIETARY TO PARKER-HANNIFIN CORPORATION. THIS DOCUMENT IS FURNISHED ON THE 
UNDERSTANDING THAT THE DOCUMENT AND THE INFORMATION IT CONTAINS WILL NOT BE COPIED OR DISCLOSED TO OTHERS EXCEPT WITH THE WRITTEN CONSENT OF 
PARKER, WILL NOT BE USED FOR ANY PURPOSE OTHER THAN CONDUCTING BUSINESS WITH PARKER, AND WILL BE RETURNED AND ALL FURTHER USE DISCONTINUED 
UPON REQUEST BY PARKER. COPYRIGHT PARKER. YEAR OF COPYRIGHT IS FIRST YEAR INDICATED ON THIS DOCUMENT. ALL RIGHTS RESERVED.  
 
 Microcontroller OFP (External F LASH PROM) Software for P/N 367-111-102 and 553-096-008.   
Table 3   
S76 RDAU SOFTWARE P/N DESCRIPTION REVISION 
553-096-008 Software Control Drawing - 
S76 RDAU 367-111-102 Hardware Assembly Drawing - 
 
HOST  
548-123-001 Unit Part Number P 
Software P/N 555-096-009 
Software Revision B 
Software Version  2.44/1.13 
Checksum 733DAB0216 
 
EPP 
548-124-001 Unit Part Number W 
Software P/N 555-096-010 
Software Revision B 
Software Version  3.14/1.14 
Checksum 2D155FA616 
 
FUEL  
548-125-001 Unit Part Number M 
Software P/N 555-096-003 
Software Revision D 
Software Version  2.12/3.5 
Checksum AD59573716 
 
BOOT  
548-(123,124,125)-001 Unit Part Number See above 
Software P/N 555-096-004 
Software Revision A 
Software Version  2.10/NA 
Checksum DBD7533B16 
 Remove Plate, Identification , P/N 696-863-002 and replace with Plate, Identification, P/N 696-
863-007 as shown in Table 4.   
Table 4.   
NEW P/N KEYWORD OLD P/N QTY DISPOSITION 
696-863-007 Plate, Identification 696-863-002 1 Scrap 
696-493-001* Label, Modification Same 1 Scrap 
NOTE:  * If existing Label, Modification, P/N 696-493-001 is not at 'Mod 0', replace it with a new 
Label, Modification, P/N 696-493-001 and mark as 'Mod 0”.   
D. Material Necessary for Each Spare   
See Table 1 through 4 above.   
E. Re-identified Parts   
After the ACCOMPLISHMENT INSTRUCTIONS in Paragraph 3 of this Service Bulletin are complete, 
the RDAU P/N 367-111-002 (Sikorsky P/N 76450-01098-107) will be re-identified as P/N 367-111-102 
(Sikorsky P/N 76450-01098-112).   
This Document Contains Technical Data Controlled by the EAR. See WARNING and classifications on first page.

### Page 39

Customer Support Operations 
SERVICE BULLETIN 
Initial Issue Jan 4, 2018  367-111-77-003 
  Page 5 of 6 
THIS DOCUMENT CONTAINS INFORMATION THAT IS CONFIDENTIAL AND PROPRIETARY TO PARKER-HANNIFIN CORPORATION. THIS DOCUMENT IS FURNISHED ON THE 
UNDERSTANDING THAT THE DOCUMENT AND THE INFORMATION IT CONTAINS WILL NOT BE COPIED OR DISCLOSED TO OTHERS EXCEPT WITH THE WRITTEN CONSENT OF 
PARKER, WILL NOT BE USED FOR ANY PURPOSE OTHER THAN CONDUCTING BUSINESS WITH PARKER, AND WILL BE RETURNED AND ALL FURTHER USE DISCONTINUED 
UPON REQUEST BY PARKER. COPYRIGHT PARKER. YEAR OF COPYRIGHT IS FIRST YEAR INDICATED ON THIS DOCUMENT. ALL RIGHTS RESERVED.  
 
F. Tooling – Price and Availability   
None.   
3. ACCOMPLISHMENT INSTRUCTIONS   
A. Option 1: Return the RDAU to Parker for on-bench software upgrade.   
B. Option 2: For customers who wish to perform the upgrade themselves (on aircraft), detailed 
instructions will be provided by Sikorsky Aircraft Corporation.   
C. Operation Flight Program (OFP) programming procedure.   
 On the 199-382-001 test set, select the following switch posit ions to:   
(a) MAIN POWER: OFF.  
(b) UUT POWER: AUTO.  
(c) COMPUTER POWER: ON.  
(d) MONITOR POWER: ON.  
(e) SORENSEN D.C. SUPPLY POWER: ON.  
 The 553-096-008 w ill display software numbers and other info needed for programming.   
 On the test set, turn the “MAIN POWER” switch to “ON”.  The test set computer will initialize 
and display the “MAIN MENU”.   
 On the test set computer, select:   
(a) Sikorsky S-76 C++ RDAU.  (NOTE: this selection supports bot h -002 and -102 part 
numbers).   
(b) OFP Download.   
(c) Board A, B and C for the HOST.   
(d) The computer will prompt for entry of various information, such as the serial number of the 
RDAU.  Enter all information as requested.   
(e) When the download is complete, the computer will display a message indicating the 
download was successful.   
 On the test set computer, select:   
(a) Board A, B and C for the EPP.   
(b) When the download is complete, the computer will display a message indicating the 
download was successful and will prompt for the next step.   
This Document Contains Technical Data Controlled by the EAR. See WARNING and classifications on first page.

### Page 40 (OCR)

Parker
Customer Support Operations
SERVICE BULLETIN
(б)  On the test set computer, select:
(a) Board A, B and C for the FUEL.
(0)  The computer will prompt for entry of software.
(c)  When the download is complete, the computer will display a message indicating the
download was successful and will prompt for the next step.
(d) Press Escape key (ESC) to exit.
4. APPENDIX
NO CONNECTION  STE P3B
J1  STE P1  P1  J1
J8  STE P8  P2  J2
J3  STE P3  P3  J3
TEST SET  J4  STE P4  P4  J4  RDAU
199-382-001  367-111-002  J10 P10
J5  STE P5  P5  J5  OR
367-111-102
J6  STE P6  P6  J6
J7  STE P7  P7  J7
J8
J9  STE P9  P8  J8
P9  J9
115V/60Hz CABLE
487-833-001
115V/60Hz
SOURCE
NOTE: CABLE 467-743-001 OR 467-743-002 IS THE CABLE THAT CONNECTS
THE TEST SET 199-382-001 TO THE RDAU 367-111-002 OR 367-111-102.
367-111-77-003SB_R0 Fig1
Figure 1
Test Set and RDAU Connection Diagram.
This Document Contains Technical Data Controlled by the EAR. See WARNING and classifications on first page.
Initial Issue Jan 4, 2018  367-111-77-003
Page 6 of 6
THIS DOCUMENT CONTAINS INFORMATION THAT IS CONFIDENTIAL AND PROPRIETARY TO PARKER-HANNIFIN CORPORATION. THIS DOCUMENT IS FURNISHED ON THE
UNDERSTANDING THAT THE DOCUMENT AND THE INFORMATION IT CONTAINS WILL NOT BE COPIED OR DISCLOSED TO OTHERS EXCEPT WITH THE WRITTEN CONSENT OF
PARKER, WILL NOT BE USED FOR ANY PURPOSE OTHER THAN CONDUCTING BUSINESS WITH PARKER, AND WILL BE RETURNED AND ALL FURTHER USE DISCONTINUELT
JPON REQUEST BY PARKER. COPYRIGHT PARKER. YEAR OF COPYRIGHT IS FIRST YEAR INDICATED ON THIS DOCUMENT. ALL RIGHTS RESERVED

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