SSI 92-070 

Revision A – April 25, 2014 

TRANSMITTAL

Special Service Instruction 92-070 dated February 19, 2014 has been revised. This page accompanies Revision A, 

dated April 25, 2014. 

92-070A dated April 25, 2014 supersedes the basic issue of 92-070, dated February 19, 2014. Text changes are 

indicated by a vertical line in the outer margin of the page. Illustration changes are indicated by a vertical line next 

to the figure title. 

INSTRUCTIONS TO OPERATORS: 

Operators that have complied with 92-070 dated February 19, 2014, no further action is required. 

Operators that have not complied with the basic issue dated February 19, 2014, comply with revision A in its 

entirety. 

HIGHLIGHTS OF THIS REVISION: 

Drawings Required for Modification 

Added 92070-55094.

Effectivity 

Revised serial numbers to 920006 through 920084. 

Instructions 

Added note prior to step A. (1) indicating alternate clamp and hardware sizes can be used to achieve proper 

fit. 

Added note prior to step B. (8) indicating No. 1 AC generator feeder must not be in contact with hydraulic 

lines. 

Added Figure 1 showing acceptable and unacceptable clearance between No. 1 AC generator feeder and 

hydraulic lines. 

Material Information 

Updated Modification Kit Required and Source Information. 
Sikorsky Aircraft Corporation

6900 Main Street

P.O. Box 9729

Stratford, Connecticut 06497-9129

(203) 386-4000

NOTICE TO ALL PERSONS RECEIVING THIS DOCUMENT:

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S-92® IS A REGISTERED TRADEMARK OF SIKORSKY AIRCRAFT CORPORATION.

SPECIAL

SERVICE INSTRUCTIONS

SSI No. 92-070A

Subject: STANDARD PRACTICES – AIRFRAME – Clamping Electrical Wires and Bundles -

Upper Deck Wiring Harness Installation, Field Modification

Purpose: To remove and reroute Upper Deck Wiring Harnesses to prevent chafe condition.

Model: S-92®

Effectivity: S-92A model helicopters with serial numbers 920006 through 920084.

Component: LH and RH upper deck wiring harnesses, mounting hardware, and associated attaching 

hardware.

Description: Helicopter is prepared for maintenance. Access is gained to the LH and RH Upper Deck 

Wiring Harnesses and electrical harnesses. Clamps are removed from the No. 1 and No. 

2 AC Generator/Engine Inlet Anti-ice Feeders and LH and RH electrical main harnesses. 

The No. 1 and No. 2 AC Generator Feeders are removed. Electrical lines mounting 

provisions are reworked. The LH and RH top deck harnesses are rerouted. The LH Top 

Deck Rotor Ice Protection System (RIPS), No. 1 AC Generator Feeder, No. 1 Engine 

Inlet Feeder, No. 2 AC Generator Feeder, and No. 2 Engine Inlet Feeder are installed. 

Clamps and hardware are installed on applicable harnesses. Helicopter is returned to 

service.

Drawings Required for Modification:

92070-20059, 92070-55034, 92070-55094, and 92551-00446.

References:

(a) Maintenance Manual SA S92A-AMM-000, Task, 30-61-00-710-001.

(b) Maintenance Manual SA S92A-AMM-000, Task, 53-70-00-900-001.

(c) Maintenance Manual SA S92A-AMM-000, Task, 71-62-04-900-001.

(d) Maintenance Manual SA S92A-AMM-000, Task, 71-62-04-900-002.

(e) Maintenance Manual SA S92A-AMM-000, Task, 20-20-02-910-001.

February 19, 2014

Revision A – April 25, 2014 Page 1 of 8

Sikorsky

A United Technologies Company
SPECIAL SERVICE INSTRUCTIONS NO. 92-070A

(f) Maintenance Manual SA S92A-AMM-000, Chapter/Section, 25-29-01.

(g) Functional Check Flight Procedures Manual, SA S92A-FCP-000.

Compliance: Sikorsky Aircraft recommends compliance with this SSI.

Approval: The design change affected by this document is classified as Minor, and is FAA approved 

in accordance with the applicable requirements of United States Federal Aviation 

Regulations 14 CFR Part 29. FAA approval constitutes EASA and Transport Canada 

approval under the terms of current bilateral agreement procedures.

Instructions:

A. Preparation for modification:

NOTE

x A complete review of this SSI is recommended before starting the 

procedure.

x Before beginning this modification procedure, use the material 

information list to inventory the kit. Make sure all parts are present and in 

serviceable condition.

x The instructions in this SSI shall be done by personnel experienced in 

standard working/repair and safety practices.

x Slight variations to the instructions contained herein are allowed, as long 

as the intent of the modification is accomplished.

x Alternate clamp and hardware sizes can be used to achieve proper fit.

WARNING

TO PREVENT ELECTRICAL SHOCK OF PERSONNEL, MAKE SURE 

ELECTRICAL POWER IS DE-ENERGIZED. DO NOT APPLY POWER 

TO HELICOPTER UNTIL INSTRUCTED TO DO SO.

(1) Turn off electrical and hydraulic power and make helicopter safe for ground maintenance.

(2) Gain access to LH and RH upper deck wiring harnesses as follows:

(a) Open No. 1 and No. 2 engine cowling/work platform. (Refer to Maintenance Manual SA 

S92A-AMM-000, Task, 53-70-00-900-001).

(b) Open main rotor pylon sliding fairing. (Refer to Maintenance Manual SA S92A-AMM-000,

Task, 53-70-00-900-001).

(c) Remove No. 1 and No. 2 engine center cover assemblies. (Refer to Maintenance Manual 

SA S92A-AMM-000, Task, 71-62-04-900-001).

(d) Remove applicable ceiling panels. (Refer to Maintenance Manual SA S92A-AMM-000,

Chapter/Section, 25-29-01).

B. Completion of modification:

(1) Remove existing clamp setups and hardware securing No. 1 AC generator feeder (92552-

07103-041), and No. 2 AC generator feeder (92552-07104-041). (Dwg 92551-00446).

February 19, 2014

Revision A – April 25, 2014 2
SPECIAL SERVICE INSTRUCTIONS NO. 92-070A

(2) Remove No. 1 AC generator feeder (92552-07103-041) (Item 30). (Dwg 92551-00446, 

sheets 8, 12, 13, 14, 16, 16.3, 16.4, 16.5, and 16.6).

(3) Remove No. 2 AC generator feeder (92552-07104-041) (Item 31). (Dwg 92551-00446, 

sheets 30, 30.1, 31, 33, 33.1, 34, 34.1, 34.2, 35.2, and 36).

(4) Rework electrical lines mounting provision between stations 221.50 and 399.54, and LH and 

RH BL 16.50 and 26.62. (Dwg 92070-20059-011, Rev A, sheets 1-3).

(5) Reroute LH top deck harness (92552-04101-046) (Item 18). (Dwg 92070-55034, sheets 9, 

10, 12, 13, 15 - 20, and 22 - 27).

(6) Reroute RH top deck harness (92552-04102-046) (Item 19). (Dwg 92070-55034, sheets 14, 

28 - 35, 37 - 46, and 48).

NOTE

Observe standard practices for clamping electrical wires and bundles. 

(Refer to Maintenance Manual SA S92A-AMM-000, Task, 20-20-02-910-

001).

(7) Install LH top deck RIPS (92552-04118-047) (Item 237). (Dwg 92070-55034, sheets 21 -

27).

CAUTION

NO. 1 AC GENERATOR FEEDER (92552-07103-042) MUST NOT BE 

IN CONTACT WITH HYDRAULIC LINES.

(8) Install No. 1 AC generator feeder (92552-07103-042) (Item 130). (Dwg 92070-55034, sheets 

17 - 19, 52, and 54 - 56).

(9) If necessary, heat and reshape No. 1 AC generator feeder boot to prevent contact with 

hydraulic lines. (Refer to Figure 1).

(10) Install No. 1 engine inlet feeder (92552-07105-041) (Item 132). (Dwg 92070-55034, sheets 

23 - 27, 49 - 56).

(11) Install No. 2 AC generator feeder (92552-07104-042) (Item 131). (Dwg 92070-55034,

sheets, 37, 38, 40 - 42, 60, 61, and 64).

(12) Install No. 2 engine inlet feeder (92552-07106-041) (Item 133). (Dwg 92070-55034, sheets 

45, 46, 48, 57 - 63).

(13) Install clamp setups and hardware in accordance with Dwg 92070-55034.

(14) Install ceiling panels. (Refer to Maintenance Manual SA S92A-AMM-000, Chapter/Section,

25-29-01).

(15) Install No. 1 and No. 2 engine center cover assemblies. (Refer to Maintenance Manual SA 

S92A-AMM-000, Task, 71-62-04-900-002).

(16) Close main rotor pylon sliding fairing. (Refer to Maintenance Manual SA S92-AMM-000, 

Task, 53-70-00-900-001).

February 19, 2014

Revision A – April 25, 2014 3
SPECIAL SERVICE INSTRUCTIONS NO. 92-070A

(17) Close No. 1 and No. 2 engine cowling/work platform. (Refer to Maintenance Manual SA 

S92A-AMM-000, Task, 53-70-00-900-001).

C. Return helicopter to service.

D. Perform operational check as follows:

(1) Perform test procedures. (Refer to Functional Check Flight Procedures Manual, SA S92AFCP-000).

(2) Perform IBIT test. (Refer to Maintenance Manual SA S92A-AMM-000, Task, 30-61-00-710-

001).

February 19, 2014

Revision A – April 25, 2014 4
SPECIAL SERVICE INSTRUCTIONS NO. 92-070A

NO. 1 AC GENERATOR FEEDER AND HYDRAULIC LINES CLEARANCE

FIGURE 1

February 19, 2014

Revision A – April 25, 2014 5
SPECIAL SERVICE INSTRUCTIONS NO. 92-070A

E. Record of compliance:

(1) Make helicopter logbook entries to show compliance with this SSI as follows:

(a) Make helicopter level logbook entry on form SA7343-15 (Aircraft ASB and CSN 

Release Signoff).

(b) When SSI modifies a component that can be removed from this helicopter:

1. Make component log card entries on forms SA7343-22 (Aircraft Component 

Log Cards) & SA7343-21 (Component Log Cards) as applicable.

2. If a component modified by this SSI does not have a log card and the SSI

does not create one, then annotate compliance on the next higher assembly 

that the component belongs to which does have a log card.

(2) Upon compliance with this SSI, complete attached SPECIAL SERVICE INSTRUCTIONS 

COMPLIANCE RECORD CARD and return it to Sikorsky Aircraft Corporation.

February 19, 2014

Revision A – April 25, 2014 6
SPECIAL SERVICE INSTRUCTIONS NO. 92-070A

Electrical Load Data:

None.

Software Load Data:

None.

Weight and Balance: Change resulting from these instructions is as follows:

W/I Upper Deck Reroute F/M: Change in weight: +23.0 lb @ station 302.5, +7.0 in. lbs/1000, BL 

2.9 (LH), +0.1 in. lbs/1000

W/I Miscellaneous Hardware Kit: Change in weight: +25.0 lb @ station 300.0, +7.5 in. lbs/1000, BL 

0.0, 0.0 in. lbs/1000

Mod Kit Mounting Provisions Electrical Lines: Change in weight: +0.7lb @ station 310.0, +0.2 in. 

lbs/1000, BL 0.0, 0.0 in. lbs/1000

Manpower (Estimated):

Task No. of Men No. of Hours Man-Hours*

Gain Access (Covers and Interior) 2 2.75 5.5 

Airframe (Modifications, Brackets, 

Penetrations) 

2 15.5 31.0 

Electrical (Removal and Installation 

of Harnesses) 

2 9.5 19.0 

Perform Operations checks 

(Electrical and Rips) 

2 1.15 2.3

Total 57.80 

*Estimate does not include time required to prepare helicopter or return it to flight status. 

Material Information:

F. Modification Kit Required:

Qty Nomenclature Part Number Source

1 Mod Kit Collector, Top Deck W/I 92070-55094-011 (1) 

Consisting of: 

1 W/I Upper Deck Reroute F/M 92070-55034-011 (1) 

1 Mod Kit Mounting Provisions Electrical 

Lines 

92070-20059-011 (1) 

G. Consumable Materials:

None.

February 19, 2014

Revision A – April 25, 2014 7
SPECIAL SERVICE INSTRUCTIONS NO. 92-070A

H. Support Equipment:

None.

I. Tooling Required:

Qty Nomenclature Part Number Source

1 Torque Wrench (50 - 250 in. lbs) Commercially Available or equivalent (2) 

J. Source:

(1) For parts availability and lead time requirements contact your Customer Service 

Representative at Helicopter Support Inc. (HSI). Submit a (cost/no-cost) purchase order 

referencing this SSI number and the helicopter serial number(s) on which these parts will be 

used. This will allow HSI and operator to track shipment and receipt of parts. Orders will be 

accepted by letter, telephone, facsimile (FAX), or through the HSI website: 

www.HSIUS.com. For prompt shipment, reference address of each shipping destination. 

Direct your order to:

HELICOPTER SUPPORT INC.

124 Quarry Road

P.O. Box 111068

Trumbull, Connecticut 06611 U.S.A.

Attn: Customer Service

FAX: (203) 416-4291, Telephone: (203) 416-4000

HSI website: www.HSIUS.com

(2) Available through normal supply channels.

February 19, 2014

Revision A – April 25, 2014 8
(Fold over and tape closed)

SIKORSKY AIRCRAFT CORPORATION

FACSIMILE NUMBER (860) 998-7565

EMAIL ADDRESS: GPSIKSASProductSafet@utc.com

ATTENTION: SAS PRODUCT SAFETY MANAGER

SIKORSKY AEROSPACE SERVICES

(Fold Up to Arrows)

IMPORTANT NOTICE

Upon COMPLIANCE with the attached SSI, 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.

SPECIAL SERVICE INSTRUCTION: ________________ Compliance Record Card

TITLE: ___________________________________________________________________

___________________________________________________________________

___________________________________________________________________

OWNER/OPERATOR: _____________________________________________________

SUBMITTED BY: ___________________________ DATE: ____________________

FOLLOWING SERIAL NUMBERS ARE NOT AFFECTED BY THIS SSI

SSI HAS BEEN COMPLIED WITH ON THE FOLLOWING SERIAL NUMBERS

___________ ___________ ___________ ___________ ___________ ___________

___________ ___________ ___________ ___________ ___________ ___________

___________ ___________ ___________ ___________ ___________ ___________

N: ________________ SSI No. 92-070A

___________________________________________________________________

___________________________________________________________________

___________________________________________________________________

R/OPERATOR:

________________

STANDARD PRACTICES – AIRFRAME – Clamping Electrical Wires and Bundles - 

Upper Deck Wiring Harness Installation, Field Modification 
No Postage 

Necessary

BUSINESS REPLY MAIL

FIRST-CLASS MAIL PERMIT NO. 432 BRIDGEPORT CT

POSTAGE WILL BE PAID BY ADDRESSEE

SIKORSKY AIRCRAFT CORPORATION

P.O. BOX 9729

6900 MAIN STREET

STRATFORD, CONNECTICUT 06615-9129 U.S.A.

MAILSTOP: S328A

ATTENTION: SAS PRODUCT SAFETY MANAGER

SIKORSKY AEROSPACE SERVICES

Please complete the form on the reverse side and FAX to

FACSIMILE NUMBER (860) 998-7565

Or scan and email to:

EMAIL ADDRESS: GPSIKSASProductSafet@utc.com

or fold and return ENTIRE form to Sikorsky Aircraft Corporation