MD Helicopters 369D Technical specifications

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Issued: 31 October 1990
Revision No. 14: 15 October 2016
Copyright E1999-2016 by MD Helicopters, Inc.
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MDHI MODEL HELICOPTERS
MODEL 369D/E/FF −500/600N
Basic Handbook of Maintenance Instructions
(CSP−HMI−3)
INSTRUMENTS−ELECTRICAL−AVIONICS
MD Helicopters, Inc.
4555 East McDowell Road
Mesa, Arizona 85215−9734

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RESTRICTED USE
MDHI provides this manual for use by owners, operators and maintainers of MDHI
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under an STC or PMA when this manual is used as documentation with the Federal
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MDHI products will void the MDHI warranty offered to the customer on components
and may void the warranty on the helicopter.

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MD HELICOPTER, INC.
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This manual has been prepared and distributed by the Technical Publications Department and is
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MANUAL TITLE : CSP-HMI-3 MAINTENANCE MANUAL
REV.
NO.
DATE
INSERTED BY REMOVED BY INCORPORATING
93−001
Revision 5
93−002
93−003
94−001 Revision 6
15−001 Revision 14
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REV.
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LIST OF EFFECTIVE PAGES
INSERT LATEST CHANGE PAGES, DESTROY SUPERSEDED PAGES
The highest revision number indicates pages changed, added or removed by the current change.
Date of original and revision pages are:
Original 31 October 1990...................
Revision 1 29 March 1991..................
Revision 2 09 September 1991..............
Revision 3 02 March 1992..................
Revision 4 14 December 1992...............
Revision 5 28 February 1994...............
Revision 6 12 May 1995....................
Revision 7 14 April 1999...................
Revision 8 17 January 2000................
Revision 9 30 April 2001...................
Revision 10 12 July 2001...................
Revision 11 26 June 2002..................
Revision 12 01 October 2003................
Revision 13 20 December 2005..............
Revision 14 15 October 2016................
Cover/Title
Cover/Title Revision 14......................
Change Request
CRi/CRii Revision 14........................
Temporary Revision
1 and 2 Revision 14.........................
List of Effective Pages
A thru D Revision 14.........................
Table of Contents
i and ii Revision 11..........................
Chapter 95
i thru xiv Revision 14.........................
95−00−00
1 thru 4 Revision 7..........................
5 Revision 9................................
6 thru 8 Revision 7..........................
101 Revision 12.............................
102 Revision 7..............................
103 Revision 8..............................
104 thru 110 Revision 11.....................
111 and 112 Revision 14.....................
401 thru 402 Revision 7......................
403 and 404 Revision 13.....................
501 thru 508 Revision 7......................
509 Revision 9..............................
510 Revision 14.............................
601 Revision 9..............................
602 Revision 7..............................
603 and 604 Revision 14.....................
801 thru 808 Revision 7......................
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95−00−10
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206 Revision 13.............................
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95−00−20
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95−10−00
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95−10−30
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901 thru 904 Revision 7......................

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95−20−00
201 thru 203 Revision 7......................
204 Revision 14.............................
95−20−10
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95−30−00
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510 Revision 12.............................
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95−50−00
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204 Revision 14.............................
Chapter 96
i thru x Revision 14..........................
96−00−00
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96−02−00
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239 Revision 9..............................
240 Revision 13.............................
241 thru 248 Revision 9......................
249 Revision 13.............................
250 thru 253 Revision 9......................
254 and 255 Revision 12.....................
256 Revision 9..............................
257 Revision 14.............................
258 Revision 9..............................
259 Revision 13.............................
260 thru 268 Revision 9......................

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96−03−00
201 Revision 8..............................
202 Revision 13.............................
203 Revision 9..............................
204 and 205 Revision 8......................
206 Revision 9..............................
207 thru 209 Revision 8......................
210 Revision 13.............................
211 Revision 9..............................
212 and 213 Revision 13.....................
214 and 215 Revision 8......................
216 Revision 13.............................
217 Revision 8..............................
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226 Revision 14.............................
96−05−00
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96−05−10
201 thru 203 Revision 8......................
204 Revision 14.............................
901 thru 907 Revision 8......................
908 Revision 14.............................
96−10−00
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205 thru 210 Revision 8......................
211 Revision 14.............................
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214 and 215 Revision 13.....................
216 Revision 11.............................
96−30−00
201 thru 218 Revision 7......................
219 thru 240 Revision 9......................
241 thru 243 Revision 10.....................
244 Revision 14.............................
96−40−00
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96−45−00
201 thru 204 Revision 11.....................
205 thru 207 Revision 14.....................
208 Revision 11.............................
901 thru 908 Revision 11.....................
96−48−00
201 thru 212 Revision 11.....................
901 thru 912 Revision 11.....................
Chapter 97
i thru vi Revision 14..........................
97−00−00
1 and 2 Revision 12.........................
97−01−00
1 thru 10 Revision 12........................
97−02−00
1 thru 4 Revision 12.........................
101 thru 108 Revision 12.....................
201 thru 204 Revision 12.....................
901 thru 908 Revision 12.....................
97−04−00
1 thru 6 Revision 12.........................
101 thru 112 Revision 12.....................
201 thru 204 Revision 12.....................
97−06−00
1 and 2 Revision 12.........................
101 thru 118 Revision 12.....................
201 thru 206 Revision 12.....................
97−08−00
201 thru 204 Revision 12.....................
205 Revision 13.............................
206 thru 208 Revision 12.....................
901 thru 908 Revision 12.....................

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Copyright ©1999−2016 by MD Helicopters, Inc.
TABLE OF CONTENTS
CSP−HMI−2
01 Introduction
04 Airworthiness Limitations
05 Continued Airworthiness Checks / Inspections
06 Dimensions and Areas
07 Lifting and Jacking
08 Leveling / Weight and Balance
09 Towing
10 Parking and Mooring
11 Placards and Markings
12 Servicing
18 Vibration and Noise Analysis
20 Standard Practices
21 Environmental Control System
25 Equipment / Furnishings
26 Fire Protection
28 Fuel System
32 Landing Gear
52 Doors
53 Fuselage
62 Main Rotor
63 Transmission and Drive System
64 Anti−Torque Assembly
67 Flight Controls
71 Power Plant
75 Engine Anti−Ice System
76 Engine Power Controls
78 Engine Exhaust System
79 Engine Oil Supply System
91 Charts
CSP−HMI−3
Cover / Title Page
Technical Manual Recommended Change Report
Record of Temporary Revisions
List of Effective Pages
95 Instruments
96 Electrical Power
97 Avionics

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NOTE:The following sections are applicable to the helicopter models denoted to the right of the
section.
Section Title 369D 369E 369FF 500N 600N
95 INSTRUMENTS
95−00−00 Instruments XXXXX.............................................
95−00−10 Slim−Line Instrument Panel (369D) X........................
95−00−20 T Instrument Panel (369E/FF −500/600N) X X X X..................
95−10−00 Pitot−Static System XXXXX......................................
95−10−10 Heated Pitot Tube XXXXX.......................................
95−10−20 Attitude Gyro Indicators XXXX..................................
95−10−30 Instantaneous Vertical Speed Indicators XXXX....................
95−20−00 Magnetic Compass XXXXX......................................
95−20−10 Directional Gyro Indicators XXXX................................
95−30−00 Power Train Instruments XXXXX.................................
95−50−00 Miscellaneous Instruments XXXXX...............................
96 ELECTRICAL
96−00−00 Electrical Power XXXXX.........................................
96−01−00 Wiring Diagrams (369D) X..................................
96−02−00 Wiring Diagrams (369E/FF −500N) X X X........................
96−03−00 Wiring Diagrams (600N) X..................................
96−05−00 Battery and Temperature Sensing XXXXX.........................
96−05−10 Heavy Duty Battery (17 Amp, 20 Cell) XXXXX......................
96−10−00 DC Generation XXXXX..........................................
96−30−00 DC Electrical Load Distribution XXXXX............................
96−40−00 Lighting System XXXXX.........................................
96−45−00 Searchlight X.............................................
96−48−00 Float Lamp X X X.............................................
97 AVIONICS
97−00−00 Avionics XXXXX................................................
97−01−00 Headset Microphones, Headset Adapters and Headset
Cables XXXXX.................................................
97−02−00 Intercommunication System (Collins) XXXXX.......................
97−04−00 Intercommunication System (King) XXXXX.........................
97−06−00 Integrated Interphone Communication System (Carter) XXXXX.......
97−08−00 Public Address and Siren System Installation X...............

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Chapter
95
Instruments

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TABLE OF CONTENTS
Para/Figure/Table Title Page
95-00-00 Instruments A...........................................................
Description and Operation 1...................................................
1. Instrument Description 1....................................................
A. Altimeter Description 1....................................................
B. Airspeed Indicator Description 1............................................
C. Three-Pack Description (369D) 1...........................................
D. Ammeter Description (369E/FF - 500N) 2...................................
E. Dual Volt / Amp Indicator Description (600N) 2..............................
F. Engine Oil Temperature Gauge Description 2................................
G. Fuel Quantity Gauge Description (369D/E/FF - 500N) 2......................
H. Fuel Quantity Indicator Description (600N) 2................................
I. Caution and Warning Indicator Lights - General 2...........................
J. Caution and Warning Indicator Lights Description (369D/E/FF - 500N) 3......
K. Caution and Warning Lights Description (600N) 4...........................
L. Autronics Indicator Lights Dimmer Assembly Description 6...................
M. Autronics Indicator Lights Dimmer Assembly Associated Circuits 6............
N. DC Voltmeter Description 8................................................
Fault Isolation 101...............................................................
1. Caution/Warning System Troubleshooting 101...................................
2. Instrument Troubleshooting 101................................................
Table 101. Caution and Warning Lights Indicating
System Troubleshooting 101......................................
Table 102. Caution and Warning Lights Troubleshooting Data 104.............
Table 103. Instrument Troubleshooting 106..................................
Figure 101. DC Voltmeter Wiring Diagram (369D294385) 110...................
Figure 102. Ammeter, Engine Oil Temperature and
Fuel Quantity Indicator Circuits 111...............................
Figure 103. Caution/Warning System Schematic 112...........................
Removal/Installation 401.........................................................
1. Instruments Replacement 401..................................................
2. Caution and Warning Indicator Lamps Replacement 401..........................
3. Caution and Warning Indicator Light Assembly Replacement 401.................
4. Autronics Indicator Lights Dimmer Assembly Replacement 402...................
5. DC Voltmeter Replacement 402.................................................
Figure 401. Indicator Light Assembly 403.....................................
Adjustment/Test 501..............................................................
1. Instruments Adjustment/Test 501...............................................

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TABLE OF CONTENTS (Cont.)
Para/Figure/Table Title Page
2. Instrument Cluster Three-Pack Calibration Check 501...........................
Table 501. Instrument Cluster Three-Pack Calibration Charts -
369D26415 Unit (Early Model) 501................................
Figure 501. Instrument Cluster Three-Pack, With Wiring Harness,
Early Model (Sheet 1 of 2) 503.....................................
Table 502. Instrument Cluster Three-Pack Calibration Charts -
369D296305-21, -31 Units (Late Model) 505.......................
Figure 502. Instrument Cluster Three-Pack, With Wiring Harness,
Late Model (Sheet 1 of 2) 506......................................
3. Ammeter Calibration 508......................................................
Table 503. Ammeter Calibration Values (369D24136-BSC Unit) 508.............
4. Engine Oil Temperature Gauge Calibration 508..................................
Table 504. Engine Oil Temperature Gauge Calibration
(369D24135-BSC Unit) 508........................................
Table 505. Engine Oil Temperature Gauge Calibration
(369D24135-3 Unit) 509...........................................
Table 506. Fuel Quantity Indicating System Calibration Values 509............
A. Dual Volt/Amp Indicator 509.................................................
Table 507. Dual Volt/Amp Indicator Calibration 509............................
Table 508. 369D24512 Ammeter Calibration Values 509........................
Inspection/Check 601.............................................................
1. Instruments Inspection 601....................................................
2. Fuel Quantity Gauge and Tank Sending Unit Operational Check 601..............
Table 601. Tank Sending Unit Circuit Resistance 601...........................
3. Caution/Warning System Operational Check 602.................................
4. Autronics Indicator Lights Dimmer Assembly Test 602...........................
Figure 601. Autronics Dimmer Schematic Diagram - Typical 603................
Repairs 801.......................................................................
1. Instrument Repair 801.........................................................
2. Instrument Cluster Three-Pack Conversion - AC to Rochester 801................
Figure 801. Instrument Cluster Three-Pack Conversion 802....................
Figure 802. Instrument Cluster Three-Pack
Wiring Diagram (Late Model) 802..................................
3. Fuel Quantity Sender Modification (369D S/N 0001 - 1116) 803...................
A. Modification of P/N 369D296303-BSC,
-701 Fuel Quantity Sending Units 803........................................
B. Modification of 369A4245 Series Fuel Quantity Sending Units 803..............
Figure 803. Fuel Quantity Sender Modification -
P/N 369D296303-BSC, -701 Units
(369D S/N 0001 - 1116) 804........................................

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TABLE OF CONTENTS (Cont.)
Para/Figure/Table Title Page
C. Weight and Balance Data 805................................................
4. Wiring Modification (369DS/N 0003 - 0162) 805..................................
Figure 804. Fuel Quantity Sender Modification -
369A4245 Series Units
(369D S/N 0001 - 1116) 806........................................
A. Weight and Balance Data 807................................................
5. T.O.T. Resistor Board Assembly (TB9) Modification 807...........................
Figure 805. Wiring Modification - Utility Light and Main Rotor
Transmission Warning Lights Circuit
(369D S/N 0003 - 0162) 808.......................................
Figure 806. T.O.T. Resistor Board Modification 808.............................
Initial Installation 901............................................................
1. DC Voltmeter Initial Installation 901............................................
A. Preparation for Installation 901..............................................
B. DC Voltmeter Installation 901................................................
C. Weight and Balance Data 901................................................
Table 901. Weight and Balance Data 901......................................
Figure 901. Mounting Bracket Installation 902................................
Figure 902. DC Voltmeter Electrical Wiring Diagram 902.......................
Figure 903. DC Voltmeter Kit Installation 903.................................
95-00-10 Slim-Line Instrument Panel (369D) A...................................
Maintenance Practices 201.......................................................
1. Slim-Line Instrument Panel 201...............................................
A. Slim-Line Instrument Panel Fairings 201.....................................
B. Slim-Line Instrument Panel Hood 201........................................
C. Slim-Line Instrument Panel General Maintenance 201.........................
2. Hood and Fairing Replacement 201.............................................
A. Hood and Fairing Removal 201...............................................
Figure 201. Slim-Line Instrument Panel - Front View
(369D S/N 3 - 1149 and 1151 - 1184) (Sheet 1 of 2) 202..............
B. Hood and Fairing Installation 203............................................
3. Slim-Line Instrument Panel Replacement 203...................................
A. Slim-Line Instrument Panel Removal 203.....................................
Figure 202. Slim-Line Instrument Panel - Front View
(369D S/N 1150 and 1185 and Subs) 204............................
B. Slim-Line Instrument Panel Installation 205..................................
Figure 203. Slim-Line Instrument Panel - Component Locations
(369D S/N 3 - 1149 and 1151 - 1184) (Sheet 1 of 2) 206...............
4. Hood Replacement 207.........................................................

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TABLE OF CONTENTS (Cont.)
Para/Figure/Table Title Page
A. Hood Removal 207..........................................................
B. Hood Installation 207........................................................
5. Hood Repair 207..............................................................
Figure 204. Slim-Line Instrument Panel - Component Locations
(369D S/N 1150 and 1185 and Sub) 208.............................
Figure 205. Slim-Line Instrument Panel Fairings 209..........................
95-00-20 ``T'' Instrument Panel (369D/E/FF - 500/600N) A.........................
Maintenance Practices 201.......................................................
1. ``T'' Instrument Panel 201......................................................
A. Fairings (L/H Command T-Panels) 201.......................................
B. Hood 201...................................................................
C. ``T'' Instrument Panel General Maintenance 201...............................
2. ``T'' Instrument Panel Replacement 201..........................................
A. ``T'' Instrument Panel Removal 201...........................................
Figure 201. R/H Command T-Panel - Front View (Typical) 202.................
Figure 202. L/H Command T-Panel - Front View (Typical) 203.................
B. ``T'' Instrument Panel Installation 204.........................................
3. Hood Replacement 204.........................................................
A. Hood Removal 204..........................................................
B. Hood Installation 204........................................................
4. Formed Polyester Glass Fiber Hood Repair 205..................................
5. Formed Thermoplastic Hood Repair 205.........................................
Figure 203. R/H Command T-Panel - Component Locations 206................
Figure 204. L/H Command T-Panel - Component Locations 207................
Figure 205. L/H Command T-Panel - Component Locations (500N) 208.........
Figure 206. L/H Command T-Panel - Component Locations (600N) 209.........
Figure 207. R/H Command T-Panel - Component Locations (600N) 210.........
95-10-00 Pitot-Static System A...................................................
Maintenance Practices 201.......................................................
1. Pitot-Static System 201.......................................................
2. Pitot-Static System Troubleshooting 201........................................
3. Static Pressure Tube Rework to Minimize Altimeter Needle Oscillation 201.........
A. Weight and Balance Data 201................................................
4. Pitot Tube Assembly Replacement 201..........................................
5. Static Tubing Replacement (369D/E/FF) 202.....................................
6. Static Tubing Replacement (500/600N) 202......................................
7. Pitot Static System Inspection 203..............................................

CSP−HMI−3
MD Helicopters, Inc.
MAINTENANCE MANUAL
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Revision 14
The information disclosed herein is proprietary to MD Helicopters, Inc.
Neither this document nor any part hereof may be reproduced or transferred to
other documents or used or disclosed to others for manufacturing or any other
purpose except as specifically authorized in writing by MD Helicopters, Inc.
Copyright ©1999−2016 by MD Helicopters, Inc.
TABLE OF CONTENTS (Cont.)
Para/Figure/Table Title Page
8. Pitot Leak Check 203..........................................................
Figure 201. Pitot-Static System (369D) 204...................................
Figure 202. Pitot-Static System (369E/FF) 205................................
Figure 203. Pitot-Static System (500/600N) 206...............................
Table 201. Troubleshooting Pitot-Static System 207............................
Figure 204. Rework of Static Pressure Tube Installation to Minimize
Altimeter Needle Oscillation 208...................................
95-10-10 Heated Pitot Tube A....................................................
Maintenance Practices 201.......................................................
1. Heated Pitot Tube 201.........................................................
A. Wiring Diagrams 201........................................................
2. Heated Pitot Tube Troubleshooting 201..........................................
A. Wire Identification Numbers 201.............................................
3. Heated Pitot Tube Replacement (Slim-Line Instrument Panel) 201................
A. Heated Pitot Tube Removal (Slim-Line Instrument Panel) 201..................
Figure 201. Heated Pitot Tube Installation (369D) 202.........................
Figure 202. Heated Pitot Tube Installation (369E/FF - 500/600N) 203...........
B. Heated Pitot Tube Installation (Slim-Line Instrument Panel) 204...............
4. Heated Pitot Tube Replacement (L/H Command T-Panel) 204.....................
A. Heated Pitot Tube Removal (L/H Command T-Panel) 204......................
B. Heated Pitot Tube Installation (L/H Command T-Panel) 204....................
Figure 203. Wiring Diagram with Slim-Line Panel (369D) 205..................
Figure 204. Wiring Diagram with 423-090 Switch Panel (369D) 205.............
Figure 205. Wiring Diagram with R/H Command T-Panel (369D) 206...........
Figure 206. Pitot Tube Wiring Diagram
(369E SN 001 - 383; 369FF SN 001 - 075) 206......................
Figure 207. Pitot Tube Wiring Diagram (369E SN 384 and Subs;
369FF SN 076 and Subs; 500/600N SN 001 and Subs) 206............
5. Canopy Panel Grommet Replacement Using A-4000 Adhesive 207.................
6. Canopy Panel Grommet Replacement Using Silastic 140 Adhesive 207.............
7. Circuit Breaker Switch Replacement 207........................................
8. Electrical Bond Jumper Replacement 208........................................
9. Heated Pitot Tube Functional Test 208..........................................
10. Heated Pitot Tube Inspection 209...............................................
11. Heated Pitot Tube Repair 209..................................................
Table 201. Troubleshooting Heated Pitot-Static System 210...................
Initial Installation 901............................................................
1. Heated Pitot Tube Initial Installation 901.......................................

CSP−HMI−3MD Helicopters, Inc.
MAINTENANCE MANUAL
[ Main Menu ]
[ HMI−3 Book TOC ]
Page vi
Revision 14 95 Contents
The information disclosed herein is proprietary to MD Helicopters, Inc.
Neither this document nor any part hereof may be reproduced or transferred to
other documents or used or disclosed to others for manufacturing or any other
purpose except as specifically authorized in writing by MD Helicopters, Inc.
Copyright ©1999−2016 by MD Helicopters, Inc.
TABLE OF CONTENTS (Cont.)
Para/Figure/Table Title Page
A. Instrument Panel Preparation (Slim-Line Instrument Panel) 901...............
B. Instrument Panel Preparation (L/H Command T-Panel) 901....................
Figure 901. Canopy Panel Grommet Hole Modification (All Models) 902..........
C. Canopy Panel Modification 902...............................................
D. Doubler Installation (Round Nose) 902........................................
Figure 902. Doubler Installation (Round Nose) 903.............................
Figure 903. Ground Stud Installation (369E/FF - 500/600N) 904................
E. Ground Studs Installation (L/H Command T-Panel) 904........................
F. Heated Pitot Tube Installation (Round Nose) 905...............................
G. Heated Pitot Tube Installation (Extended Nose) 905............................
H. Weight and Balance Data 906................................................
Table 901. Weight and Balance Data 906......................................
Figure 904. Warning Decal Location 906......................................
95-10-20 Attitude Gyro Indicators A.............................................
Maintenance Practices 201.......................................................
Table 201. Attitude Gyro Indicator Installation (369H90038) 201................
1. Attitude Gyro Indicator Description 201.........................................
2. Attitude Gyro Indicator - Shipping, Transporting and
Handling Guidelines 201.......................................................
A. Shipping and Transporting 201...............................................
B. Gyro Handling 202..........................................................
C. Attitude Gyro Indicator Troubleshooting 202...................................
D. Circuit Breaker and Switch 202..............................................
E. Electrical Overload 202......................................................
F. Wiring Harness 202.........................................................
G. Attitude Gyro Indicator 203..................................................
H. Input Voltage 203...........................................................
I. Attitude Gyro Indicator Maintenance Practices 203............................
3. Attitude Gyro Indicator Replacement 203........................................
A. Attitude Gyro Indicator Removal 203.........................................
B. Attitude Gyro Indicator Installation 203.......................................
4. Attitude Gyro Indicator Operational Check 203..................................
Figure 201. Installations Attitude Gyro Indicator 204..........................
Figure 202. Wiring Diagrams and Installations (Sheet 1 of 2) 205................
Initial Installation 901............................................................
1. Attitude Gyro Indicator Initial Installation 901..................................
A. Attitude Gyro Indicator Operating, Handling and Shipping Guidelines 901.......