# Bombardier Service Bulletin 60-78-9

Copy: No revision named ("SB 60-78-9"), 37 pages: PDF https://openairdocs.org/files/sha256/bc/86/bc866b3d28cc6c64a724e9bb6857423a94cbb0aab1ecf9f2ab36eea8342167ea; text https://openairdocs.org/service-documents/bombardier/sb-60-78-9/file/bc866b3d28cc.md. Rights: © Bombardier Inc. Filed by the FAA in regulations.gov docket FAA-2019-0204; AD 2020-11-04 incorporates this document by reference. Not covered by OpenAirDocs’ CC0 dedication.

## Details

- Manufacturer: [Bombardier](https://openairdocs.org/service-documents/bombardier.md)
- Type: Service bulletin (Service Bulletin)
- Number: 60-78-9
- Page: https://openairdocs.org/service-documents/bombardier/sb-60-78-9

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

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

- [AD 2020-11-04](https://openairdocs.org/ad/2020-11-04.md), effective Jun 25, 2020: No revision named

Also cited in [1 proposed AD](https://openairdocs.org/service-documents/bombardier/sb-60-78-9/proposed.md).

## Text (37 pages)

Rights: © Bombardier Inc. Filed by the FAA in regulations.gov docket FAA-2019-0204; AD 2020-11-04 incorporates this document by reference. Not covered by OpenAirDocs’ CC0 dedication. Each page's text from the PDF; open the PDF at a page with #page=N.

### Page 1

2
THIS PUBLICATION IS AVAILABLE AT:
https://my.businessaircraft.bombardier.com
Refer to applicable government agency regulations and requirements and make sure that the work described 
in this publication is performed in compliance with manufacturer’s recommendations and/or acceptable industry standards. 
This document is proprietary to Bombardier Inc. and/or its affiliates and may not be reproduced or copied in any form or by 
any means without the prior written consent of Bombardier Inc. and/or its affiliates. 
© 2018, Bombardier Inc. All rights reserved. 
Challenger*, Global Express*, Learjet*, are Trademarks of Bombardier Inc.
SB 60-78-9
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Basic Issue: Jun 25/18 
Contact Information Distribution Date
Business Aircraft 
Learjet Inc.
MS 53
P .O. Box 7707
Wichita, Kansas 67277-7707
Customer Response Center (CRC)
1-866-538-1247 (Toll Free)
1-514-855-2999 (Tel)
Push 5 then 2 for Parts Services or push 4 
then 2 for Technical Publications.
June 25, 2018
LEARJET 60
If the instructions in this publication cannot be completed because of an STC change to the aircraft, speak to
the STC holder or the regional Federal Aviation Administration (FAA) office for information and disposition.
Service Bulletin
These commodities, technology or software were exported from the United States in accordance
with the Export Administration Regulations. Diversion contrary to United States law is prohibited.
SB 60-78-9
Recommended
EXHAUST - THRUST REVERS ER SYSTEM IMPROVEMENT
1. Planning Information
A. Effectivity
(1) Learjet 60-002 thru 60-430.
NOTE: For aircraft effectivities 60-002 thru 60-2 76, Learjet Service Bulletin 60-78-7, "Installa-
tion of Thrust Reverser Interface Box" must be performed prior to  or in conjunction
with this kit.
B. Reason
(1) The engine thrust reverser (T/R) system may be operated where one or both T/Rs are not
deployed when they are commanded to be deployed, or, one or both T/Rs may inadvertently stow
uncommanded after be ing deployed. In which ca se, the flight crew may not be aware of the
improper position of the T/R buckets as commanded.

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Basic Issue: Jun 25/18 
LEARJET 60
Service Bulletin
C. Description 
(1) This service bulletin provides instructions to in stall a Thrust Reverser (T/R) Voice Command Warn-
ing System (VCWS) in the aircraft to alert operators of a thrust reverser malfunction.
D. Compliance
(1) Recommended - Bombardi er Learjet Inc. recommends complianc e with this modification at the
next 1200 hour inspection or 48 months. Whichever occurs first.
E. Approval
(1) The Federal Aviation Administr ation (FAA) has approved the techni cal content in this publication
that has an effect on the airplane type design. 
(2) The European Aviation Safety Agency (EASA) has  accepted the technical content in this publica-
tion that has an effect on the airplane type design.
(3) Transport Canada Civil Av iation (TCCA) has accepted the technical content in this publication that
has an effect on the airplane type design.
F. Labor Hours - Estimated Accomplishment Time
NOTE: The labor hours provided are estimates to  assist scheduling and planning the tasks given
in this bulletin. The estimates are for direc t labor performed by an experienced crew and
do not include the time for familiarization, planning, aircraft preparation in hangar, such as
towing and positioning of sca ffolds, removal of aircraft loose equipment, acquisition of
tools and equipment, training, supervision and inspection. 
If labor coverage is provided, only the hours above will be paid.
When planning to complete these instruct ions, please contact Bombardier Aerospace,
Learjet Inc. Business Aircraft Customer Service, Parts Services for parts availability and
shipping times as necessary. (Refer to the title page of this document for contact
information.)
-807 
KIT
-806 
KIT
-802 
KIT
-801 
KIT TASK
4.0 4.0 4.0 4.0 Labor hours to gain access.
12.0 12.0 12.0 12.0 Labor hours to do the aircraft modification.
3.0 3.0 3.0 3.0 Labor hours to do a functional test/operational check.
1.0 1.0 1.0 1.0 Labor hours to return the aircraft to airworthy status.
20.0 20.0 20.0 20.0 Total Labor Hours

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Basic Issue: Jun 25/18 
LEARJET 60
Service Bulletin
G. Expense Coverage
(1) Labor Coverage
(a) Aircraft in the Learjet ma nufactured warranty period / vendor warranty period , labor coverage
is provided.
NOTE: For labor coverage to apply, these instructions must be completed at a
Bombardier Business Aviation Service Facility or at a Bombardier Learjet
Authorized Service Facility. These instructions must be completed within 24
months from the Basic Issue distribution date of this publication.
(b) Aircraft out of the Learjet manufactured warranty period / vendor warranty period , no labor
coverage is provided.
(2) Material Coverage
(a) Aircraft in the Learjet manufactured warra nty period / vendor warranty period , material cover-
age is provided.
NOTE: For material coverage to apply, an order must be plac ed for these kits/parts from
Bombardier Learjet within 12 months from the Basic Issue distribution date of this
publication.
(b) Aircraft out of the Learjet manufactured warranty period / vendor warranty period , no material
coverage is provided.
(3) Smart Parts Plus Coverage
(a) On aircraft in the new aircraft warranty period at the time of service bulletin distribution , Smart
Parts Plus does not pay for the kit necessary to do this service bulletin at any time.
(b) On aircraft out of the new aircra ft warranty period at the time of service bulletin distribution ,
Smart Parts Plus pays for the kit necessary to do this service bulletin for up to 48 months from
the Basic Issue distribution date of this service bulletin. 
H. Material Required
NOTE: The above prices can change.
Refer to Paragraph 2.A. to determine which kit is necessary.
* For current prices, availability, ordering and shipping information, please call Bombardier
Aerospace, Learjet Inc. Business Aircraft Customer Service, Parts Services. (Refer to the
title page of this document for contact information.)
PART NUMBER QTY NOMENCLATURE * PRICING 
6078330001-801 1 Service Bulletin Kit $28,273.71
6078330001-802 1 Service Bulletin Kit $28,271.04
6078330001-806 1 Service Bulletin Kit $28,273.71
6078330001-807 1 Service Bulletin Kit $28,271.04

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Basic Issue: Jun 25/18 
LEARJET 60
Service Bulletin
(1) Other materials/parts necessary to complete these instructions.
NOTE: * Refer to Learjet Maintenance Manual, Chapter 20.
For current prices, availability, ordering and shipping information, please call
Bombardier Aerospace, Learjet Inc. Busi ness Aircraft Customer Service, Parts
Services. (Refer to the title page of this document for contact information.)
I. Tools, Equipment and Materials
(1) Refer to Chapter 51 of the Structural Repair Manual, "Honeycomb Insert Repair".
J. Weight and Balance
(1) Change in basic weight and moment. 
K. References
NOTE: If applicable, referenced third party docu mentation can be accessed from the Customer
Portal under this service bulletin number.
(1) Service Bulletin Compliance Response Form.
(2) Service Bulletin Evaluation Sheet.
(3) Learjet Maintenance  Manual, Chapters 20, 24, 29 and 53.
(4) Learjet Structural Repair Manual, Chapter 51.
(5) Learjet Wiring Manual, Chapter 20.
(6) Learjet Model 60/60XR Thrust Re verser VCWS Troubleshooting Guide.
PART
NUMBER NOMENCLATURE QTY MANUFACTURER
(* See Note) Alodine As Required Obtain Locally
EY 3009
or 
Hysol EA9321
or 
ATR-500 A/B
Epoxy Insert
Potting Compound
1 HB Fuller
Loctite Aerospace (Dexter Aerospace 
Adhesive Div.)
Advanced Technology & Research Inc.
KIT 
NUMBER CHANGE IN BASIC WEIGHT CHANGE IN BASIC MOMENT
-801 Plus (+) 2.57 pounds Plus (+) 320 inch-pounds
-802 Plus (+) 2.57 pounds Plus (+) 320 inch-pounds
-806 Plus (+) 2.32 pounds Plus (+) 289 inch-pounds
-807 Plus (+) 2.32 pounds Plus (+) 289 inch-pounds

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Basic Issue: Jun 25/18 
LEARJET 60
Service Bulletin
L. Other Publications Affected
(1) Learjet Illustrated Pa rts Catalog, Chapter 78.
2. Material Information
A. Parts Required
(1) The 6078330001-801 kit applies to aircraft serial effectivity 60-001 thru 60-072, 60-074 thru 60-
293, 60-295 thru 60-306 and 60-308 thru 60-318 without the T/R voice warning unit provisioning kit
installed and contains the parts that follow:
PART NUMBER QTY NOMENCLATURE IDENTIFICATION CODE ALTERNATE
6078330003-801 1 Relay Box - T/R VCWS E6078330003
MS35650-302 1 Nut GS78-01
MS21042-3 1 Locknut GS78-01
MS35338-43 2 Lockwasher GS78-01
AN960JD10L 4 Washer GS78-01
MS35207-265 1 Screw GS78-01
M15570-22-1 1 Insertion/Extraction Tool RP501, RP502
*** M81969/14-10 1 Insertion/Extraction Tool P60783300011
M81969/1-02 1 Insertion/Extraction Tool P60783300012
8809032 20 Ft Flex Sleeving (0.25 in)
M83519/2-8 8 Solder Shield Termination
MS25083-2BB13 1 Bonding Jumper
TJS322701 2 Dual Wire Splice SP5, SP6
D436-37 16 Splice SP1-SP4, SP7-SP18
MS27039-1-04 8 Screw - Pan Head 630A-020
NAS1149F0332P 8 Washer - Flat 630A-020
NAS1836C3-11 8 Insert 630A-020E6078330003
MS3367-1-9 30 Tie Wrap (6 inch)
M39029/1-100 2 Contact - Pin TJ118/TJ121
36151 2 Ring Terminal (#6-22AWG) P60783300012 31882
320552 3 Ring Terminal (#10-22AWG) GS156/GS78-01 31884
030-2259-000 3 Contact - Pin RP1232(MP)
2803-4-0000 10 Contact - Socket RJ501, RJ502
2841-5-9000 10 Contact - Pin RP501, RP502

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Basic Issue: Jun 25/18 
LEARJET 60
Service Bulletin
NOTE: Some hardware co mes in pre-packaged quant ities. When that occurs, the quantity in the
kit will be more than the quantity in the parts list.
* Replace the existing screw locks (2ea) on the Gender Changer P/N DGB37M with
Female Screw Lock kit P/N 7253.
** Use extraction tool P/N 305183 (not included in kit) to remove/install contacts in connec-
tors P60783300013/J60783300013 and P60783300014.
*** Use insertion/extraction tool P/N M81969/14-10 to install contacts in P60783300011.
* 7253 2 Kit - Screw Lock Female (0.375)
DGB37M 1 Gender Changer (DB37 Male/Male)
5-1478762-4 1 Backshell P60783300012B
1757820-9 1 Connector - Plug (with contacts) P60783300012
206036-3 1 Connector - Receptacle J60783300013
** 66103-4 16 Contact - Pin J60783300013
206070-8 2 Cable Clamp
J60783300013
P60783300013
** 66105-4 24 Contact - Socket P60783300013P60783300014
206037-1 1 Connector - Plug P60783300013
2-1478762-5 6 Backshell P60783300011B
1757820-8 1 Connector - Plug (with contacts) P60783300011
630A-020 1 Audio Storage Playback Unit E6078330001
6078330001-805 1 Wire Kit
206060-1 1 Connector P60783300014
1-206062-6 1 Backshell P60783300014B
PART NUMBER QTY NOMENCLATURE IDENTIFICATION CODE ALTERNATE

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Basic Issue: Jun 25/18 
LEARJET 60
Service Bulletin
(2) The 6078330001-802 kit ap plies to aircraft serial effectivity 60-294, 60-307, 60 -319 thru 60-424
and 60-426 thru 60-430 without the T/R voice warning unit provisioning kit installed and contains
the parts that follow:
PART NUMBER QTY NOMENCLATURE IDENTIFICATION CODE ALTERNATE
6078330003-801 1 Relay Box - T/R VCWS E6078330003
MS35650-302 1 Nut GS78-01
MS21042-3 1 Locknut GS78-01
MS35338-43 2 Lockwasher GS78-01
AN960JD10L 4 Washer GS78-01
MS35207-265 1 Screw GS78-01
M15570-22-1 1 Insertion/Extraction Tool RP501, RP502
*** M81969/14-10 1 Insertion/Extraction Tool P60783300011
M81969/1-02 1 Insertion/Extraction Tool P60783300012
M81969/14-02 1 Insertion/Extraction Tool TJ118, TJ121
8809032 20 Ft Flex Sleeving (0.25 in)
M83519/2-8 8 Solder Shield Termination
MS25083-2BB13 1 Bonding Jumper
TJS322701 2 Dual Wire Splice SP5, SP6
D436-37 14 Splice SP1-SP4, SP7, SP8, SP11-SP18
MS27039-1-04 8 Screw - Pan Head 630A-020
NAS1149F0332P 8 Washer - Flat 630A-020
NAS1836C3-11 8 Insert 630A-020
MS3367-1-9 30 Tie Wrap (6 inch)
M39029/1-100 2 Contact - Pin TJ118/TJ121 31882
36151 2 Ring Terminal (#6-22AWG) P60783300012 31884
320552 3 Ring Terminal (#10-22AWG) GS156
030-2259-000 3 Contact - Pin RP1232 (MP)
2803-4-0000 10 Contact - Socket RJ501, RJ502
2841-5-9000 10 Contact - Pin RP501, RP502
* 7253 2 Kit - Screw Lock Female (0.375)

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SB 60-78-9
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Basic Issue: Jun 25/18 
LEARJET 60
Service Bulletin
NOTE: Some hardware co mes in pre-packaged quant ities. When that occurs, the quantity in the
kit will be more than the quantity in the parts list.
* Replace the existing screw locks (2ea) on the Gender Changer P/N DGB37M with
Female Screw Lock kit P/N 7253.
** Use extraction tool P/N 305183 (not included in kit) to remove/install contacts in connec-
tors P60783300013/J60783300013 and P60783300014.
*** Use insertion/extraction tool P/N M81969/14-10 to install contacts in P60783300011.
DGB37M 1 Gender Changer (DB37 Male/Male)
5-1478762-4 1 Backshell P60783300012B
1757820-9 1 Connector - Plug (with con-tacts) P60783300012
206036-3 1 Connector - Receptacle J60783300013
** 66103-4 16 Contact - Pin J60783300013
206070-8 2 Cable Clamp
J60783300013
P60783300013
** 66105-4 24 Contact - Socket P60783300013P60783300014
206037-1 1 Connector - Plug P60783300013
2-1478762-5 6 Backshell P60783300011B
1757820-8 1 Connector - Plug (with con-tacts) P60783300011
630A-020 1 Audio Storage Playback Unit E6078330001
6078330001-808 1 Wire Kit
206060-1 1 Connector P60783300014
1-206062-6 1 Backshell P60783300014B
PART NUMBER QTY NOMENCLATURE IDENTIFICATION CODE ALTERNATE

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SB 60-78-9
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Basic Issue: Jun 25/18 
LEARJET 60
Service Bulletin
(3) The 6078330001-806 kit applies to aircraft 60-073 with t he T/R voice warning unit provisioning kit
6078330002-801 installed and contains the parts that follow:
NOTE: Some hardware co mes in pre-packaged quant ities. When that occurs, the quantity in the
kit will be more than the quantity in the parts list.
* Use insertion/extraction tool P/N M81969/14-10 to install contacts in P60783300011.
** Use insertion/extraction tool P/ N 305183 (not included in kit) to install contacts in con-
nector P60783300014.
PART NUMBER QTY NOMENCLATURE IDENTIFICATION CODE
6078330003-801 1 Relay Box - T/R VCWS E6078330003
MS35650-302 1 Nut GS78-01
MS21042-3 1 Locknut GS78-01
MS35338-43 2 Lockwasher GS78-01
AN960JD10L 2 Washer GS78-01
MS35207-265 1 Screw GS78-01
M15570-22-1 1 Insertion/Extraction Tool RP501, RP502
* M81969/14-10 1 Insertion/Extraction Tool P60783300011
M81969/1-02 1 Insertion/Extraction Tool P60783300012
8809032 20 Ft Flex Sleeving (0.25 in)
M83519/2-8 8 Solder Shield Termination
MS25083-2BB13 1 Bonding Jumper
MS27039-1-04 8 Screw - Pan Head 630A-020
NAS1149F0332P 8 Washer - Flat 630A-020
630A-020 1 Audio Storage Playback Unit E6078330001
206060-1 1 Connector P60783300014
1-206062-6 1 Backshell P60783300014B
** 66105-4 4 Contact - Socket P60783300014

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Basic Issue: Jun 25/18 
LEARJET 60
Service Bulletin
(4) The 6078330001-807 kit applies to aircraft 60-425 with t he T/R voice warning unit provisioning kit
6078330002-802 installed and contains the parts that follow:
NOTE: Some hardware co mes in pre-packaged quant ities. When that occurs, the quantity in the
kit will be more than the quantity in the parts list.
* Use insertion/extraction tool P/N M81969/14-10 to install contacts in P60783300011.
** Use insertion/extraction tool P/ N 305183 (not included in kit) to install contacts in con-
nector P60783300014.      
PART NUMBER QTY NOMENCLATURE IDENTIFICATION CODE
6078330003-801 1 Relay Box - T/R VCWS E6078330003
MS35650-302 1 Nut GS78-01
MS21042-3 1 Locknut GS78-01
MS35338-43 2 Lockwasher GS78-01
AN960JD10L 4 Washer GS78-01
MS35207-265 1 Screw GS78-01
M15570-22-1 1 Insertion/Extraction Tool RP501, RP502
* M81969/14-10 1 Insertion/Extraction Tool P60783300011
M81969/1-02 1 Insertion/Extraction Tool P60783300012
M81969/14-02 1 Insertion/Extraction Tool TJ118, TJ121
8809032 20 Ft Flex Sleeving (0.25 in)
M83519/2-8 8 Solder Shield Termination
MS25083-2BB13 1 Bonding Jumper
MS27039-1-04 8 Screw - Pan Head 630A-020
NAS1149F0332P 8 Washer - Flat 630A-020
630A-020 1 Audio Storage Playback Unit E6078330001
206060-1 1 Connector P60783300014
1-206062-6 1 Backshell P60783300014B
** 66105-4 4 Contact - Socket P60783300014

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Basic Issue: Jun 25/18 
LEARJET 60
Service Bulletin
(a) The 6078330001-805  wire kit is a component of the 6078330001-801  kit and contains the
parts that follow: 
NOTE: Some hardware  comes in pre-packaged qu antities. When that occurs, the quantity in the
kit will be more than the quantity in the parts list.
(5) Wire Code table for 607833 0001-805 Wire Kit applies to aircraft serial effect ivity 60-001 thru 60-
293, 60-295 thru 60-306 and 60-308 thru 60-318.
NOTE: The 6078330001-805 Wire  kit contains specific lengths of wire with coded labels as
follows.
PART NUMBER 
OR WIRE CODE QTY NOMENCLATURE OR WIRE SPECIFICATION
M27500-24SN2T23 6 Ft Wire Twisted Shielded Pair 24 GA
B0801150-22-9 289 Ft Wire 22 GA
WIRE SPECIFICATION WIRE CODE LENGTH
607833000101A22 2 Feet
607833000102A22 2 Feet
607833000102B22 2 Feet
607833000103A22 2 Feet
607833000103B22 15 Feet
607833000103C22 15 Feet
607833000105A22 15 Feet
607833000105B22 2 Feet
B0801150-22-9 607833000106A22 15 Feet
607833000106B22 2 Feet
607833000107A22 30 Feet
607833000107B22      5 Feet
607833000109A22 2 Feet
607833000110A22 2 Feet
607833000110B22 2 Feet
607833000121A22N 5 Feet
607833000123A22N 5 Feet
607833000125A22 2 Feet
607833000126A22 2 Feet

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Basic Issue: Jun 25/18 
LEARJET 60
Service Bulletin
NOTE: Some hardware co mes in pre-packaged quant ities. When that occurs, the quantity in the
kit will be more than the quantity in the parts list.
607833000126B22 2 Feet
607833000127A22 2 Feet
607833000127B22 2 Feet
607833000128A22 2 Feet
607833000128B22 2 Feet
607833000129A22 2 Feet
607833000129B22 2 Feet
B0801150-22-9 607833000130A22 2 Feet
607833000130B22 2 Feet
607833000131A22 2 Feet
607833000131B22 2 Feet
607833000132A22 2 Feet
607833000132B22 2 Feet
607833000133A22 2 Feet
607833000133B22 2 Feet
M27500-24SN2T23 607833000104A24 6 Feet
WIRE SPECIFICATION WIRE CODE LENGTH

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Basic Issue: Jun 25/18 
LEARJET 60
Service Bulletin
(6) Wire Code table for 6078 330001-808 Wire Kit applies to aircr aft serial effectivity 60-294, 60-307
and 60-319 thru 60-430.
NOTE: The 6078330001-808 Wire  kit contains specific lengths of wire with coded labels as
follows:
WIRE SPECIFICATION WIRE CODE LENGTH
607833000111A22 2 Feet
607833000112A22 2 Feet
607833000112B22 2 Feet
607833000113A22 2 Feet
607833000113B22 15 Feet
607833000113C22 15 Feet
607833000115A22 15 Feet
607833000115B22 5 Feet
607833000115C22 2 Feet
607833000116A22 15 Feet
607833000116B22 5 Feet
607833000116C22 2 Feet
B0801150-22-9 607833000117A22 15 Feet
607833000117B22 5 Feet
607833000119A22 2 Feet
607833000120A22 2 Feet
607833000120B22 2 Feet
607833000122A22N 5 Feet
607833000124A22N 5 Feet
607833000134A22 2 Feet
607833000135A22 2 Feet
607833000135B22 2 Feet
607833000136A22 2 Feet
607833000136B22 2 Feet
607833000137A22 2 Feet
607833000137B22 2 Feet
607833000138A22 2 Feet

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Basic Issue: Jun 25/18 
LEARJET 60
Service Bulletin
NOTE: Some hardware co mes in pre-packaged quant ities. When that occurs, the quantity in the
kit will be more than the quantity in the parts list.
3. Accomplishment Instructions
A. Gain Access
(1) Set the battery switches to OFF. If necessary, di sconnect external electrical power and the aircraft
batteries. (Refer to Chapter 24 of the Maintenance Manual.)
(2) Access will be required to route the wire from the aft pedestal to the bulkhead receptacle RJ501,
pilot circuit breaker panel and copilot circuit breaker panel.
(3) Access will also be required to route wire from the bulkhead connector RP501 to EGPWS AE438
connector RP1232 (MP), in the nose compartment, or EGPWS AE438 connector RP1232 (MP), in
the baggage compartment as installed, and terminal junction blocks TJ118 & TJ121.
B. Modification of Aircraft 
NOTE: For dimensions defined without specific t olerance information, refer to Paragraph 3.G. for
standard tolerances.
On aircraft that install the -801 & -802 kits, begin with Step 1.
On aircraft that install the -806 & -807 kits, proceed to Step 8.
(1) Remove the aft ped estal. (Refer to Chapter 53 of the Maintenance Manual.)
(2) Remove the Forward Mid Access Panel (220AC) under the aft pedestal location. (Refer to Chapter
53 of the Maintenance Manual.)
(3) Install inserts for mounting  the Audio Storage Playback Unit and Relay Box-T/R VCWS. (See  Fig-
ure 1, Detail F.) (Refer to Chapter 51 of the Structural Repair Manual .) Mark the floor plate "Modi-
fied per SB60-78-9" near the inserts. 
(4) Install new wiring. (See  Figure 2, for aircraft 60-001 thru 60-293, 60-295 thru 60-306, and 60-308
thru 60-318.) (See Figure 3, for aircraft 60-294, 60-307 and 60-319 thru 60-430.)
(a) Route wiring. (See  Figure 1, Sheets 1 thru 7 and Sheet 9.) (Refer to Chapter 20 of the Wiring
Manual, Standard Practices.) 
607833000138B22 2 Feet
607833000139A22 2 Feet
607833000139B22 2 Feet
B0801150-22-9 607833000140A22 2 Feet
607833000140B22 2 Feet
607833000141A22 2 Feet
607833000141B22 2 Feet
607833000142A22 2 Feet
607833000142B22 2 Feet
M27500-24SN2T23 607833000114A24 6 Feet
WIRE SPECIFICATION WIRE CODE LENGTH

### Page 15

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Basic Issue: Jun 25/18 
LEARJET 60
Service Bulletin
(5) Replace existing screw lo cks on gender changer with Female Screw Lock kit P/N 7253.
NOTE: This replaces the existing aluminum  screw locks with new steel screw locks.
(6) Install the Gender Changer DGB37M on Audio Storage Playback Unit connector J2.
(7) Install the Forward Mid Access Panel (220AC) under the aft pedestal. (Refer to Chapter 53 of the
Maintenance Manual.)
NOTE: On aircraft that install the -801 & -802 kits, proceed to Step 14.
(8) Install connector P60783300014 to aircraft wiring as follows:
(a) Depin wires 607833000113A22, 607833000113B22, 607833000113C22 and 
607833000124A22N from connector P60783300011.
(b) Remove existing contacts from wires and install sockets 66105-4.
(c) Install wires 607833000113A22, 607833000113B22, 607833000113C22 
607833000124A22N into P60783300014. (See Figure 2 for aircraft 60-001 thru 60-293, 60-
295 thru 60-306 and 60-308 thru 60-318), (See Figure 3 for aircraft 60-294, 60-307 and 60-
319 thru 60-430).
(9) Remove the Jumper Receptacle J60783300011. Destroy jumper receptacle 6078330002-806. 
(10) Uncap, un-stow and remove th e Gender Changer attached to  the Audio Storage Playback Unit
connector P60783300012. 
(11) Connect the Gender Changer connector to  the Audio Storage P layback Unit J2. (See  Figure 1 ,
Detail F.)
(12) Install the Audio Storage Playback Unit and the Relay Box-T/R VCWS on the Forward Mid Access
Panel (220AC).
(13) Connect the bonding jumper from GS78-01 to the Audio Storage Playback Unit mounting screw.
(14) Connect P60783300011  and P60783300014 to Relay Box-T/R VCWS.
(15) Connect P60783300012 to Gender Changer.
(16) Connect P60783300013 to J60783300013.
(17) Return aircraft to normal configuration.
(18) Restore electrical power. (Refer to Chapter 24 of the Maintenance Manual.)
C. Functional Test/Operational Check
(1) Perform the T/R Voice Warning Unit Functional Test as follows:
(a) Preparation:
1) Make sure aircraft is  in a Weight On Wheel (WOW) configuration.
2) Verify the following circuit breakers are in:
a) CB93 “L T/R Auto Stow”.
b) CB94 “R T/R Auto Stow”.
3) Verify external power unit is connected to aircraft and is turned on. (Refer to Chapter 24 of
the Maintenance Manual.)
4) Verify “BATTERY 1” & “BATTERY 2”  switches are set on (UP position).
5) Do not apply hydraulic power to the aircraft.
(b) Testing (without Hydraulic Pressure)
1) Set L throttle lever to Idle.
2) Set L T/R lever to Deploy position, make sure that the following occurs:
a) VCWS sounds repeating “STOW THRUST REVERSERS” aural warning after 4 sec-
onds.
b) VCWS audio is synchroniz ed between L and R speakers. 
c) VCWS “STOW THRUST REVERSERS” aural is heard in both cockpit headsets.
3) Stow L T/R lever.
a) VCWS silences.

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Basic Issue: Jun 25/18 
LEARJET 60
Service Bulletin
4) Set R throttle lever to Idle.
5) Set R T/R lever to Deploy position, make sure that the following occurs:
a) VCWS sounds repeating “STOW THRUST REVERSERS” aural warning after 4 sec-
onds.
b) VCWS audio is synchronized between L an d R speakers and is heard in both cockpit
headsets.
6) Stow R T/R lever.
a) VCWS silences.
7) Set LR T/R lever to Deploy position, make sure that the following occurs:
a) VCWS sounds repeating “STOW THRUST REVERSERS” aural warning after 4 sec-
onds.
b) VCWS audio is synchronized between L an d R speakers and is heard in both cockpit
headsets. 
8) Stow L T/R lever.
a) VCWS continues to sound.
9) Stow R T/R lever.
a) VCWS silences.
10) L T/R lever to Deploy position, make sure that the following occurs:
a) VCWS sounds repeating “STOW THRUST REVERSERS” aural warning after 4 sec-
onds.
b) VCWS audio is synchronized between L an d R speakers and is heard in both cockpit
headsets. 
11) Pull the L TR AUTO STOW CB (CB93).
a) VCWS continues to sound.
12) Pull the R TR AUTO STOW CB (CB94).
a) VCWS silences.
13) Push in L and R TR AUTO STOW CBs (CB93, CB94).
a) VCWS does not sound after 4 seconds.
14) Set L T/R lever to Stow position, make sure that the following occurs:
a) No result.
15) Set R T/R lever to Deploy position , make sure that the following occurs:
a) VCWS sounds repeating “STOW THRUST REVERSERS” aural warning after 4 sec-
onds.
b) VCWS audio is synchronized between L and R speakers and is heard in both cockpit
headsets.
16) Pull the R TR AUTO STOW CB (CB94).
a) VCWS continues to sound.
17) Pull the L TR AUTO STOW CB (CB93).
a) VCWS silences.
18) Push in L and R TR AUTO STOW CBs (CB93, CB94).
a) VCWS does not sound after 4 seconds.
19) Set R T/R lever to Stow position.
a) No result.
(c) Testing (with Hydraulic Pressure)
WARNING: MAKE SURE THAT ALL PERSONNEL AND EQUIPMENT ARE CLEAR OF
THRUST REVERSERS BEFORE OPERATION.
1) Apply hydraulic pressure to  the aircraft. (Refer to Chapter 29 of the Maintenance Manual.)
a) No result.
2) L T/R lever to Deploy position.
a) L T/R deploys.

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LEARJET 60
Service Bulletin
3) Pause 4 seconds, pull L TR CONT CB (CB37).
a) L T/R stows.
b) VCWS sounds repeating “STOW THRUST REVERSERS” aural warning.
c) VCWS audio is synchronized between L and R speakers and is heard in both cockpit
headsets.
4) Stow L T/R lever.
a) VCWS silences.
5) R T/R lever to Deploy position.
a) R T/R deploys.
6) Pause 4 seconds, pull R TR CONT CB (CB36).
a) R T/R stows.
b) VCWS sounds repeating “STOW THRUST REVERSERS” aural warning.
c) VCWS audio is synchronized between L an d R speakers and is heard in both cockpit
headsets.
7) Stow R T/R lever.
a) VCWS silences.
8) Set L and R throttle levers to CUTOFF.
(d) Power Down
1) Remove hydraulic power from the aircraft and disconnect the ca rt if no longer required.
(Refer to Chapter 29 of the Maintenance Manual.)
2) Remove electrical po wer from aircraft and disconnect gr ound power unit if no longer
required. (Refer to Chapter 24 of the Maintenance Manual.)
(e) Return aircraft to Weight On Wheel (WOW) configuration.
D. Return Aircraft to Airworthy Status
(1) Make sure the batter ies are connected to the aircraft. (Refer to Chapter 24 of the Maintenance
Manual.)
(2) Install any additional it ems removed for access.
E. Compliance Response Form
(1) Complete the compliance response form.
(2) Send the compliance resp onse form to Learjet Inc. as soon as possible.
F. Aircraft Maintenance Records
(1) Complete the Aircraft Maintenance Records in accordance with the regulatory requirements of the
appropriate aircraft certification authority.
G. General Information
(1) The table below lists standard tolerances which shall apply to dimensions defined within the
instructions or illustrations of this document that do not have specified tolerances.
UNLESS OTHERWISE SPECIFIED
ALL TOLERANCES ARE AS FOLLOWS:
DECIMALS ANGLES
 0.0 ± 0.1 in [0.0 mm ± 2.54 mm]
0.00 ± 0.03 in [0.00 mm ± 0.76 mm]
0.000 ± 0. 010 in [0.000 mm ± 0.254 mm] 
MACHINED FORMED
± 0°30’ ± 2 °

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Basic Issue: Jun 25/18 
LEARJET 60
Service Bulletin
Thrust Reverser System Improvement
Figure 1 (Sheet 1 of 10)
PRIMARY VIEW AND DETAIL LOCATOR
K60-607809-001-01K60-607809-001-01
A
BC
C B
D
D
E
E
F
A
LOCKWASHER
MS35338-43
WASHER
AN960JD10L
(2 REQUIRED)
LOCKNUT
MS21042-3
TYPICAL GROUND STUD BUILD-UP
(USE FOR REFERENCE ONLY)
FRAME STATION
LOCKWASHER
MS35338-43
SCREW
MS35207-265 WASHER
AN960JD10L
(2 REQUIRED)
BONDING JUMPER
MS25083-2BB13
NUT
MS35650-302

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Basic Issue: Jun 25/18 
LEARJET 60
Service Bulletin
Thrust Reverser System Improvement
Figure 1 (Sheet 2 of 10)
K60-607809-001-02
PEDESTAL WIRE ROUTING LOCATOR
(ADJACENT EQUIPMENT NOT SHOWN FOR CLARITY)
SECURE THE T/R
VOICE WARNING
WIRES TO EXISTING
WIRE HARNESS.
GROUND STUD GS78-01
(INSTALL PER WIRE
DIAGRAM CHAPTER 20)
P/N MS25083-2BB13
TO GP201A AND GS78-01
AND BONDING JUMBER
ROUTING OF GROUND WIRESAUDIO STORAGE
PLAYBACK UNIT
(REF)
ROUTE WIRES COVERED IN FLEX
SLEEVING AS NEEDED FROM T/R
VOICE WARNING WIRE HARNESS
OVER TO EXISTING WIRE HARNESS
(LOCATED ON PILOT SIDE OF
PEDESTAL) ROUTED FORWARD, UP
TO AVIONICS HARNESS ROUTING.
PICK UP AVIONICS WIRE HARNESS
ROUTING BUNDLE (ON PILOT SIDE
GOING UP TO PRESSURE BULKHEAD)
AT THIS POINT TO ROUTE WIRES FROM
AUDIO STORAGE PLAYBACK UNIT.
(REF)
RELAY BOX
MIXER
(1 REQUIRED)
WARN
AURAL
ROUTE PATH ALONG
FLOOR TO FORWARD
PRESSURE BULKHEAD.
CONNECTOR PLUG
P60783300013
CONNECTOR
RECEPTACLE
J60783300013
T/R VCWS
CONNECTOR PLUG
206060-1
CABLE CLAMP
1-206062-6 (P60783300014)
FLEX WEAVE SLEEVING 0.250
8809032
(RELAY BOX T/R VCWS J2
RECEPTACLE CONNECTOR)

### Page 20

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Basic Issue: Jun 25/18 
LEARJET 60
Service Bulletin
Thrust Reverser System Improvement
Figure 1 (Sheet 3 of 10)
K60-607809-001-03
E70
AE333
FROM P/J501
TERMINAL
JUNCTIONS
OR
965-0976-040-212-212
965-0976-040-226-226
FS
47.23
FS
61.23
FS
99.57
BL
0.00
GG
View A-A
LOOKING DOWN
EGPWS
FS
75.23
FS
89.23

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Basic Issue: Jun 25/18 
LEARJET 60
Service Bulletin
Thrust Reverser System Improvement
Figure 1 (Sheet 4 of 10)
K60-607809-001-04
FS
110.99
FS
99.57
FS
124.39
FS
137.79
FS
151.19
FS
164.59
ROUTE NEW WIRES FROM T/R VOICE
WARNING UNIT THROUGH FLOOD
LIGHT WIRE HARNESS (LOCATED ON 
THE FLOOR ON PILOT SIDE OF
PEDESTAL) FORWARD UP TO
View B-B
FORWARD PRESSURE BULKHEAD.
LOOKING DOWN ON CENTER PEDESTAL SHOWS
WIRE ROUTING FROM VCWU TO PRESSURE BULKHEAD
FWD
AUDIO
STORAGE
(SOME EQUIPMENT AND STRUCTURE NOT SHOWN FOR CLARITY)
BL
0.00
ROUTING FROM AUDIO STORAGE
PLAYBACK UNIT. (NOT YET INSTALLED
TO COPILOT CB PANEL)
GROUND
POINT
201A
ROUTING FROM AUDIO STORAGE
PLAYBACK UNIT. (NOT YET INSTALLED
TO PILOT CB PANEL)
PLAYBACK
UNIT
RELAY BOX
T/R VCWS
WARN
MIXER
AURAL

### Page 22

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Basic Issue: Jun 25/18 
LEARJET 60
Service Bulletin
Thrust Reverser System Improvement
Figure 1 (Sheet 5 of 10)
K60-607809-001-05
FS
110.99
FS
99.57
FS
124.39
FS
137.79
FS
151.19
FS
164.59
View C-C
LOOKING OUTBOARD AT PILOT CB PANEL
PILOT T/R VOICE WARNING WIRE ROUTE
(SOME EQUIPMENT AND STRUCTURE NOT SHOWN FOR CLARITY)
STGR
16
STGR
20
STGR
22
T/R VOICE WARNING WIRING
ROUTE WITH EXISTING WIRING
PLAYBACK
UNIT
ROUTE WIRE
607833000103C22 (-801)
607833000113C22 (-802)
WITH EXISTING WIRING.
T/R VOICE WARNING WIRING
TO PILOT CB PANEL.
TO P/J 501
PILOT CB PANEL
6018241
WARN
MIXER
RELAY BOX
T/R VCWS
AURAL
STORAGE
AUDIO

### Page 23

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Basic Issue: Jun 25/18 
LEARJET 60
Service Bulletin
Thrust Reverser System Improvement
Figure 1 (Sheet 6 of 10)
K60-607809-001-06
FS
110.99
FS
99.57
FS
124.39
FS
137.79
FS
151.19
FS
164.59
View D-D
LOOKING OUTBOARD AT COPILOT CB PANEL
COPILOT T/R VOICE WARNING WIRE ROUTE
(SOME EQUIPMENT AND STRUCTURE NOT SHOWN FOR CLARITY)
ROUTE WIRE
607833000107A22 (-801)
607833000117A22 (-802)
607833000115A22 (-802)
607833000116A22 (-802)
WITH EXISTING WIRING
TO P/J 501
ROUTE WIRE
607833000103B22 (-801)
607833000113B22 (-802)
WITH EXISTING WIRING.
T/R VOICE WARNING WIRING
TO COPILOT CB PANEL.
FROM T/R VOICE WARNING
TO EGPWS (IF INSTALLED)
AND TERMINAL JUNCTIONS
TJ118 & TJ121 (-802)
CB PANEL
6018242
AUDIO STORAGE
PLAYBACK UNIT
T/R VOICE WARNING WIRING
ROUTE WITH EXISTING WIRING
COPILOT
BOX T/R
VCWS
WARN
MIXER
RELAY 
AURAL

### Page 24

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Basic Issue: Jun 25/18 
LEARJET 60
Service Bulletin
Thrust Reverser System Improvement
Figure 1 (Sheet 7 of 10)
K60-607809-001-07
View E-E
LOOKING FORWARD AT FRAME STATION 99.57
FORWARD PRESSURE BULKHEAD WIRE ROUTING
RBL
15.50
ROUTE NEW WIRE
WITH EXISTING WIRING
FROM T/R VOICE WARNING
TO RECEPTACLES R/J501
OR R/J507 FOR EGPWS
RBL
10.80
LBL
10.80
BL
0.00
R/J501, R/J502, & R/J507
FACE VIEW OF PLUG INSERT
SOCKET #35
SOCKET #34
SOCKET #33
SOCKET #32
SOCKET #31
FRAME 6
PRESSURE
BULKHEAD
RSM04-27-30S
R/J502
RSM04-27-30S
R/J501
SOCKET #91
SOCKET #90
SOCKET #88
SOCKET #86
SOCKET #87
RSM04-27-30SY
R/J507
(IF INSTALLED) AND TERMINAL
JUNCTIONS TJ118 & TJ121
(-802) AS SHOWN

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Basic Issue: Jun 25/18 
LEARJET 60
Service Bulletin
Thrust Reverser System Improvement
Figure 1 (Sheet 8 of 10)
2
K60-607809-001-08Detail F
COMPONENT INSTALLATION
FWD
3.80 in
9.65 cm
3.50 in
8.89 cm
4.70 in
11.94 cm
7.30 in
18.54 cm
4.00 in
10.16 cm
PANHEAD SCREW
MS27039-1-04
FLAT WASHER
NAS1149F0332P
(1 REQUIRED, 8 PLACES)
RELAY BOX - T/R VCWS
6078330003-801
(1 REQUIRED)FWD MID ACCESS
PANEL (220AC)
5410789-032
(RE-IDENTIFIED TO 6084062-808 IF
SB 60-77-2 HAS BEEN COMPLIED WITH)
(1 REQUIRED, 8 PLACES)
ACCESS
PANEL (220AC)
5410789-032
FWD MID
NAS1836C3-11
(1 REQUIRED,
8 PLACES)
INSERT
PLAYBACK UNIT
630A-020
(1 REQUIRED)
AUDIO STORAGE
ATTACHMENT LOCATIONS, LOOKING DOWN AT COCKPIT FLOOR PANEL
1
2
NOTE
Notes information is found on
the last sheet of the figure.
J2 (REF)
3
8.50 in
21.59 cm
2.90 in
7.37 cm
GENDER CHANGER
7253
KIT SCREWLOCK FEMALE
DGB37M
(2 REQUIRED)
6.00 in
15.24 cm
PLUG CONNECTOR
206060-1
(REF)

### Page 26

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Basic Issue: Jun 25/18 
LEARJET 60
Service Bulletin
Thrust Reverser System Improvement
Figure 1 (Sheet 9 of 10)
K60-607809-001-9
123456789 10 11 12
123456789 10 11 12
123456789 10 11 12
123456789 10 11 12
123456789 10 11 12
123456789 10 11 12
TJ118
TJ119
TJ120
TJ121
TJ122
TJ123
TERMINAL
MODULE 12
4
TERMINAL
MODULE 12
4
View G-G
(EFFECTIVE ONLY FOR AIRCRAFT
60-294, 60-307, 60-319 THRU  60-430)
REAR VIEW OF TERMINAL
MODULE T/J118 &
T/J121 LAYOUT
INDEX
INDICATOR
LOOKING INBOARD, FROM PILOT SIDE
TERMINAL MODULE INSTALLATION
NOTE
Notes information is found on
the last sheet of the figure.

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Basic Issue: Jun 25/18 
LEARJET 60
Service Bulletin
Thrust Reverser System Improvement
Figure 1 (Sheet 10 of 10)
K60-607809-001-01-10
NOTES
1
2 It is acceptable to relocate mounting holes for audio storage playback unit
and relay box-T/R VCWS ± 2 inch [5.08 cm].
3 Electrically bond in this area. Bond jumper to audio storage playback unit, and
Refer to Chapter 20 of the Maintenance Manual for instructions to install inserts.
Adhesive or epoxy is required but not provided in the service bulletin kits.
4 Use insertion/extraction tool P/N M81969/14-02 to install/remove contacts in terminal module.
from there to pedestal structure. (Refer to Chapter 20 of the Wiring Manual.)

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Basic Issue: Jun 25/18 
LEARJET 60
Service Bulletin
Wire Diagram for aircraft 60-001 thru 60-293, 60-295 thru 60-306, and 60-308 thru 60-318
Figure 2 (Sheet 1 of 3)
K60-607809-002-01
E42
FWD PED &
QUADRENT
C
L ARM
B
J1 P86
7
6S13 S11
L DISARM
L DEPLOY
L STOW
5
9
8
A
E
D
P8 J8
L
M
Z
V
K
P719 J1
E289
LH THRUST
REVERSER
28V ARM IN
L 28V DEPLOY IN
STOW
ARM GND
28V T/R CONT OUT
N
P
MM
DD
M
P5 J5
1
29
32
12
J2
E6078330001
AUDIO STORAGE
PLAYBACK UNIT
L T/R ARM COMMAND IN
L T/R DEPLOY COMMAND IN
28VDC IN
AIRCRAFT GND
L AUDIO OUT HI
3
11
8
5
L AUDIO OUT LO
L T/R FAIL ANNUN OUT
L T/R DEPLOYED INPUT
P60783300012
630A-020
1
3
X
FR
26
P4 J4
2
TO R T/R
PANEL
E290
P718 PIN M
K113A22
K114A22
K110B22
K249B22
K112A22
K113B22
K114B22
K110A22
K249A22
K112B22
607833000127B22
607833000102A22
FR
26A
K89B22
607833000105A22
10
7
E6078330003
T/R VCWS
RELAY BOX
8
20
10
9
A2A3
A1
X1
X2
CR6
CR3
CR5
K3
L/H 28V
T/R CONT
POWER
A2
X1
K1 X2
A1
A3
1
4
E6078330003 T/R
RELAY PANEL
SP1 SP13
SP2
SP11 SP12
P60783300011 J1
2607833000102B22
7
8
10
9607833000128B22
607833000129B22
A
AUTO
STOW
POWERED
2
3
P60783300013 J60783300013
607833000103A22
E230
AURAL
CH 5WARNING J
E38
COPILOT CB
J3
M
CB94
R T/R
PANEL
E39
PILOT CB
J2
CB93
L T/R
PANEL
MIXER AMP
J1 P663
607833000104A24
607833000121A22NGP201A
GP156
P60783300014
AUTO STOW
K89A22
SP3
P60783300013 J60783300013
AUTO STOW
M
P22
P31
607833000103B22
607833000103C22
SP4
607833000123A22N
GP201A
FR
26
TO L T/R
PANEL E289
P719 PIN M
K87A22
K87B22
I
T/R VCWS
CR1
E6078330003
RELAY BOX
43
P60783300011 P60783300011
607833000105B22
607833000126B22
607833000127A22
607833000128A22
607833000126A22
607833000129A22
607833000101A22
E72
ANNUNCIATOR
J2 P767
18L T/R DEPLOY
PANEL
21
J101 P101 SP9
ANNUNCIATOR
TO L T/R
PANEL
E289
P719 PIN C
K81B22K81C22
VCWS RELAY BOX
J2
SP17
1 (CONTINUED ON SHEET 2)
L T/R

### Page 29

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Basic Issue: Jun 25/18 
LEARJET 60
Service Bulletin
Wire Diagram for aircraft 60-001 thru 60-293, 60-295 thru 60-306, and 60-308 thru 60-318
Figure 2 (Sheet 2 of 3)
K60-607809-002-02
E42
FWD PED &
QUADRENT
E
R ARM
F
J2 P422
12
S12 S10
R DISARM
R DEPLOY
R STOW
H
F
P
P8 J8
L
M
Z
V
K
P718 J1
E290
RH THRUST REVERSER
RELAY PANEL
28V ARM IN
R 28V DEPLOY IN
STOW
ARM GND
28V T/R CONT OUT
D
C
PP
NN
B
P4 J4
AE438
EGPWS
MP RP1232(MP)
7DAUDIO INHIBIT
(MARK V)
20
J2
E6078330001
AUDIO STORAGE
PLAYBACK UNIT
R T/R DEPLOY COMMAND IN
R T/R ARM COMMAND IN
R AUDIO OUT LO
21
9
33
7
R AUDIO OUT HI
EGPWS AUDIO INHIBIT OUT
R T/R DEPLOYED INPUT
P60783300012
630A-020
SP7
SP8
K84A22
K85A22
K120B22
K109B22
K83A22
K84B22
K85B22
K120A22
K109A22
K83B22
607833000110A22607833000110B22
FR
26A
13
14
10
11
32
P60783300011
FR
6
10
9
607833000125A22
607833000107B22
6
1
3
15
E6078330003
T/R VCWS
RELAY BOX
16
22
18
17
607833000109A22
15
16
13
14
4
P60783300013 J60783300013
SP14
607833000131A22607833000131B22
SP15 SP16
607833000130A22
607833000130B22
607833000132A22
607833000132B22
A2A3
A1
X1
X2
CR8
CR4
CR7
K4 R/H 28V
T/R CONT
POWER
A2
X1
NO EGPWS MUTE CMD
K2
A
X2
A1
A3
5
6
E6078330003 T/R VCWS RELAY BOX
EGPWS MUTE CMD607833000107A22
T/R VCWS
CR2
E6078330003
RELAY BOX
13 12
P60783300011 P60783300011
607833000106C22
J1
P60783300011 J1
(NOSE INSTALLATION
IF INSTALLED)
AE438
EGPWS
MP RP1232(MP)
7DAUDIO INHIBIT
(MARK V)
9
(AFT FUSELAGE INSTALLATION
IF INSTALLED)
E72
ANNUNCIATOR
J4 P765
25R T/R DEPLOY
PANEL
21
J100 P100 SP10
ANNUNCIATOR
TO R T/R
PANEL
E290
P718 PIN C
K77B22K77C22
607833000106A22
607833000133A22607833000133B22
RP501 RJ501
11
11
14607833000123A22N
1 (CONTINUED 
FROM SHEET 1)

### Page 30

THIS PUBLICATION IS AVAILABLE AT:
https://my.businessaircraft.bombardier.com
SB 60-78-9
Recommended
Page 30 of 33
Basic Issue: Jun 25/18 
LEARJET 60
Service Bulletin
Wire Diagram for aircraft 60-001 thru 60-293, 60-295 thru 60-306, and 60-308 thru 60-318
Figure 2 (Sheet 3 of 3)
K60-607809-002-03
NOTE
Indicate new or rerouted wiring and/or electrical components
Indicate existing wires and/or electrical components
Indicate deleted wiring and/or electrical components
SOLID LINES
DASHED LINES
HASHED LINES
CAPPED LINES Indicate capped and stowed wiring
Fill all contact positions with contacts.1
Shields to be terminated into ring terminal and attached to connector and backshell.2
Shield and pigtail length to be 4 inches.
Use insertion/extraction tool P/N M81969/1-02 to install contacts in connector.3
Use insertion/extraction tool P/N M81969/16-01 to install contacts in relay.4
Use insertion/extraction tool P/N M81969/14-01 to install/remove contacts in 5
connector RP1102P1/2RP1102P1.
Use insertion/extraction tool P/N M15570-22-1 to install contacts in connector.6
Use solder shield termination M83579/2-8 with wire removed to cover shield.7
Break ground wire from covered wire harness near GS156, then route and terminate wire.8
If installed.9
The J8/P8 connector effectivity is Learjet 60-104 and subsequent.10
All splices must be no more than 6 in [15.24 cm] from the connector.11

### Page 31

THIS PUBLICATION IS AVAILABLE AT:
https://my.businessaircraft.bombardier.com
SB 60-78-9
Recommended
Page 31 of 33
Basic Issue: Jun 25/18 
LEARJET 60
Service Bulletin
Wire Diagram for aircraft 60-294, 60-307 and 60-319 thru 60-430
Figure 3 (Sheet 1 of 3)
K60-607809-003-01
E42
FWD PED &
QUADRENT
C
L ARM
B
J1 P86
7
6S13 S11
L DISARM
L DEPLOY
L STOW
5
9
8
A
E
D
P8 J8
L
M
Z
V
K
P719 J1
E289
LH THRUST
REVERSER
28V ARM IN
L 28V DEPLOY IN
STOW
ARM GND
28V T/R CONT OUT
N
P
MM
DD
M
P5 J5
1
29
32
12
J2
E6078330001
AUDIO STORAGE
PLAYBACK UNIT
L T/R ARM COMMAND IN
L T/R DEPLOY COMMAND IN
28VDC IN
AIRCRAFT GND
L AUDIO OUT HI
3
11
8
5
L AUDIO OUT LO
L T/R FAIL ANNUN OUT
L T/R DEPLOYED INPUT
P60783300012
630A-020
1
3
65
X
FR
26
P4 J4
RP503 RJ503
2
TO R T/R
PANEL
E290
P718 PIN M
K113A22
K114A22
K110B22
K249B22
K112A22
K113B22
K114B22
K110A22
K249A22
K112B22
607833000136B22
607833000112A22
FR
26A
K89B22
E483
L-DCU
J2 E483P2
64L T/R DEPLOYANNUNCIATOR
E484
L-EDC
J2 E484P2
64L T/R DEPLOYANNUNCIATOR
12A
12B
12C
12D 31
RP501 RJ501
1TL5047C22
607833000115B22 607833000115A221TL5047E22
1TL5047D22
TJ118
TO L T/R
PANEL
E289
P719 PIN C
FR
6
FR
6
1TL5047B22
10
7
E6078330003
T/R VCWS
RELAY BOX
8
20
10
9
A2A3
A1
X1
X2
CR6
CR3
CR5
K3
L/H 28V
T/R CONT
POWER
RELAY PANEL
SP1 SP13
SP2
SP11 SP12
P60783300011 J1
2607833000112B22
7
8
10
9607833000137B22
607833000138B22
P60783300013 J60783300013
607833000113A22
E230
AURAL
CH 5WARNING J
E38
COPILOT CB
J3
M
CB94
R T/R
PANEL
E39
PILOT CB
J2
CB93
L T/R
PANEL
MIXER AMP
J1 P663
607833000114A24
607833000122A22NGP201A
GP201A
AUTO STOW
K89A22
SP3
P60783300013 J60783300013
AUTO STOW
M
P22
P31
607833000113B22
607833000113C22
SP4
FR
26
TO L T/R
PANEL E289
P719 PIN M
K87A22
K87B22
I
T/R VCWS
CR1
E6078330003
RELAY BOX
43
P60783300011 P60783300011
607833000115C22
607833000135B22
607833000136A22
607833000137A22
607833000135A22
607833000138A22
607833000111A22
11
11
11
J5
A2
X1
K1 X2
A1
A3
1
4
E6078330003 T/R
A
AUTO
STOW
POWERED
2
3
P60783300014
607833000124A22N
GP201A
VCWS RELAY BOX
J2
SP18
1 (CONTINUED ON SHEET 2)
L T/R

### Page 32

THIS PUBLICATION IS AVAILABLE AT:
https://my.businessaircraft.bombardier.com
SB 60-78-9
Recommended
Page 32 of 33
Basic Issue: Jun 25/18 
LEARJET 60
Service Bulletin
Wire Diagram for aircraft 60-294, 60-307 and 60-319 thru 60-430
Figure 3 (Sheet 2 of 3)
K60-607809-003-02
E42
FWD PED &
QUADRENT
E
R ARM
F
J2 P422
12
S12 S10
R DISARM
R DEPLOY
R STOW
H
F
P
P8 J8
L
M
Z
V
K
P718 J1
E290
RH THRUST REVERSER
RELAY PANEL
28V ARM IN
R 28V DEPLOY IN
STOW
ARM GND
28V T/R CONT OUT
D
C
PP
NN
B
P4 J4
AE438
EGPWS
MP RP1232(MP)
7DAUDIO INHIBIT
(MARK V)
20
J2
E6078330001
AUDIO STORAGE
PLAYBACK UNIT
R T/R ARM COMMAND IN
R AUDIO OUT LO
21
9
33
7
R AUDIO OUT HI
EGPWS AUDIO INHIBIT OUT
R T/R DEPLOYED INPUT
P60783300012
630A-020
SP7
SP8
K84A22
K85A22
K120B22
K109B22
K83A22
K84B22
K85B22
K120A22
K109A22
K83B22
607833000120A22607833000120B22
FR
26A
13
14
10
11
32
P60783300011
FR
6
10
9
607833000134A22
607833000117B22
6
65
RP504 RJ504
E483
R-DCU
J2 2E483P2
64R T/R DEPLOYANNUNCIATOR
E484
R-EDC
J2 2E484P2
64R T/R DEPLOYANNUNCIATOR
12A
12B
12C
12D 30
RP501 RJ501
2TL5047C22
607833000116B22 607833000116A2221TL5047E22
21TL5047D22
TJ121
TO R T/R
PANEL
E290
P718 PIN C
FR
6
FR
6
2TL5047B22
1
3
15
E6078330003
T/R VCWS
RELAY BOX
16
22
18
17
607833000119A22
15
16
13
14
4
P60783300013 J60783300013
SP14
607833000140A22607833000140B22
SP15 SP16
607833000139A22
607833000139B22
607833000141A22
607833000141B22
A2A3
A1
X1
X2
CR8
CR4
CR7
K4 R/H 28V
T/R CONT
POWER
A2
X1
NO EGPWS MUTE CMD
K2
A
X2
A1
A3
5
6
E483
E6078330003 T/R VCWS RELAY BOX
EGPWS MUTE CMD607833000117A22
T/R VCWS
CR2
E6078330003
RELAY BOX
13 12
P60783300011 P60783300011
607833000116C22
J1
P60783300011 J1
11
RP501 RJ501
607833000142A22607833000142B22
R T/R DEPLOY COMMAND IN
14607833000124A22N
1 (CONTINUED 
FROM SHEET 1)

### Page 33

THIS PUBLICATION IS AVAILABLE AT:
https://my.businessaircraft.bombardier.com
SB 60-78-9
Recommended
Page 33 of 33
Basic Issue: Jun 25/18 
LEARJET 60
Service Bulletin
Wire Diagram for aircraft 60-294, 60-307 and 60-319 thru 60-430
Figure 3 (Sheet 3 of 3)
K60-607809-003-03
NOTE
Indicate new or rerouted wiring and/or electrical components
Indicate existing wires and/or electrical components
Indicate deleted wiring and/or electrical components
SOLID LINES
DASHED LINES
HASHED LINES
CAPPED LINES Indicate capped and stowed wiring
Fill all contact positions with contacts.1
Shields to be terminated into ring terminal and attached to connector and backshell.2
Shield and pigtail length to be 4 inches.
Use insertion/extraction tool P/N M81969/1-02 to install contacts in connector.3
Use insertion/extraction tool P/N M81969/16-01 to install contacts in relay.4
Use insertion/extraction tool P/N M81969/14-01 to install/remove contacts in 5
connector RP1102P1/2RP1102P1.
Use insertion/extraction tool P/N M15570-22-1 to install contacts in connector.6
Use solder shield termination M83579/2-8 with wire removed to cover shield.7
Break ground wire from covered wire harness near GS156, then route and terminate wire.8
If installed.9
The J8/P8 connector effectivity is Learjet 60-104 and subsequent.10
All splices must be no more than 6 in [15.24 cm] from the connector.11

### Page 34

SERVICE BULLETIN COMPLIANCE RESPONSE
It is necessary that Bombardier Learje t record aircraft ha ving complied with
this Service Bulletin. Please fill in the Service Bulletin and aircraft information
below, sign and date the form in the space provided, fold on dotted lines, seal
with tape, and mail completed form to Bombardier Learjet Maintenance Engi-
neering. If mailed within the United Stat es, this form may be mailed to Bom-
bardier Learjet Maintenan ce Engineering using bu siness reply mail (see
reverse). This form may be faxed or emailed if preferred. (See mailing infor-
mation provided.)
WARRANTY - Completion of this response form is required in order to pro-
cess the warranty claim. Therefore, if a warranty allowance is provided in the
Service Bulletin, return a copy of this form with the warranty claim.
SMART PARTS - Completion of this response  form is required in order to
remain, enroll, or re-enroll in the Smart Parts Program.
*An email will be opened addressed to 
Fracas and this form will be attached.
Mailing Information:
Bombardier Learjet
Maintenance Engineering
(MS #78) (FAX 316 946-2305)
fracas_usa@aero.bombardier.com
Customer Support
Learjet, Inc.
CLICK HERE TO EMAIL
Service Bulletin Information
SB Title: ___________________________________________________________________________________
Service Bulletin No. _______________________ Rev No. ____________ Date ________________________
Aircraft Information
Model _____________ Serial No. _____________ Flight Hours _______________ Landings ______________
Service Facility Information
Facility Incorporating Bulletin ___________________________________________________________________
Compliance Information
The above referenced Service Bulletin was complied with on the referenced serial number aircraft at the listed air-
craft flight hours/landings:
Actual hours to accomplish Service Bulletin: Access __ _____ Modify_______ Test(s) _______ Restore ________
Name: (Please Print) ______________________________________________ Date _____________________
Email: __________________________________________________________
Comments
Thrust Reverser System Improvement
60-78-9 Basic 6/25/2018

### Page 35

FOLD HERE LAST. SEAL WITH TAPE. DO NOT STAPLE.
ATTN: MAINTENANCE ENGINEERING (MS NO. 78)
LEARJET INC
PO BOX 7707
WICHITA, KS 67277-9801
POSTAGE WILL BE PAID BY ADDRESSEE
BUSINESS REPLY MAIL
PERMIT NO. 2928 WICHITA, KSFIRST-CLASS MAIL
FOLD HERE FIRST
NO POSTAGE
NECESSARY
IF MAILED
IN THE
UNITED STATES

### Page 36

UPON COMPLETION OF THE EVALUATION FORM, YOU MAY FOLD AND RETURN TO ADDRESS ON THE
REVERSE SIDE OR USE THE SUBMIT BUTTON AT THE TOP TO EMAIL IT.
SERVICE BULLETIN EVALUATION SHEET
YOUR COMMENTS WILL HELP US IMPROVE
OUR SERVICE BULLETINS
*An email will be opened addressed to the 
SB Group and this form will be attached.
CLICK HERE TO EMAIL
SERVICE BULLETIN: ____________________ REVISION: _________ DATED: ________________________
TITLE: ____________________________________________________________________________________
Actual hours to accomplish Service Bulletin: Access: ______ Modify: ____ ___ Test(s): ______ Restore: _______
PLEASE SUPPLY THE FOLLOWING: NAME: _____________________________________________
OPERATOR: ___________________________________ EMAIL: ____________________________________
AIRCRAFT: _________________________________________ TELEPHONE:  _________________________
POOR FAIR GOOD VERY 
GOOD
EXCELLENT
HOW EASY IS THE BULLETIN TO UNDERSTAND?
COMMENTS
DOES THE BULLETIN TELL YOU ALL YOU NEED TO KNOW 
ABOUT THE JOB?
COMMENTS
DO YOU THINK THE BULLETIN CONVEYS THE BEST WAY 
TO DO THE JOB?
COMMENTS
HOW REALISTIC ARE THE LABOR-HOUR ESTIMATES?
COMMENTS
WHAT IS YOUR APPRECIATION OF THE ILLUSTRATION(S)?
COMMENTS
60-78-9 Basic 6/25/2018
Thrust Reverser System Improvement

### Page 37

FOLD HERE LAST. SEAL WITH TAPE. DO NOT STAPLE.
ATTN: TECHNICAL PUBLICATIONS (MS NO. 53)
LEARJET INC
PO BOX 7707
WICHITA, KS 67277-9801
POSTAGE WILL BE PAID BY ADDRESSEE
BUSINESS REPLY MAIL
PERMIT NO. 2928 WICHITA, KSFIRST-CLASS MAIL
FOLD HERE FIRST
NO POSTAGE
NECESSARY
IF MAILED
IN THE
UNITED STATES

---
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