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HELICOPTERS 

SB369H-255 

SB369E-111 

SB500N-049 

SB369D-213 

SB369F-098 

SERVICE BULLETIN DATE: 30 APRIL 2014 

PAGE 1 OF 10 

II MANDATORY 11111111111111 MANDATORY 11111111111111 MANDATORY II 

ONE-TIME INSPECTION OF FUEL PUMP HARNESS ROUTING 

AND DECAL INSTALLATION 

* Supersedes Service Bulletin SB369HN-210, SB369DN-150, SB369EN-38, and SB369FN-27, 

dated 15 September 1987. Revised to the latest MD Helicopters, Inc. (MDHI) style and format. 

1. PLANNING INFORMATION 

A. Aircraft Mfected: 

All MD Helicopters, Inc. (MDHI) Model369A (0H-6A), 369H, 369HE, 369HS, 369HM, 

AND 369D helicopters. 

MDHI Model 369E helicopters, SN's 0001E thru 0620E. 

MDHI Model369F/FF helicopters, SN's 0001FF thru 0212FF, 0600FF thru 0602FF and 

0700FF thru 0711FF with a PN 369A8143-3 auxiliary fuel pump installed. 

MDHI Model 500N helicopters, SN's LN001 thru LNOlll. 

B. Assembly/Components Mfected By This Notice: 

369A8143 or 369A8143-3 Auxiliary Fuel Pump Assemblies 

· 369A8113 LH Fuel Cell Fuel Inlet Hose Assembly 

C. Reason: 

Recent field incidents have occurred where maintenance personnel have not followed the 

procedures in CSP-H-2 or CSP-HMI-2 regarding the installation of the auxiliary fuel 

(start) pump. An incorrectly positioned auxiliary fuel (start) pump wire can interfere with 

the fuel quantity sensor float. This interference can result in erroneous fuel quantity 

indications. To prevent this situation, the fuel pump wire must be wrapped around the fuel 

inlet hose as shown in the applicable maintenance manual. 

D. Description: 

Procedures in this bulletin give owners and operators information to do a one-time 

inspection of the auxiliary fuel pump assembly wire routing in the left hand fuel cell, and 

corrective action, if necessary. A decal is also installed on the LH fuel cell access cover that 

refers personnel to the procedures contained in the appropriate maintenance manual. 

E. Time of Compliance: 

The requirements of this bulletin must be completed no later than the next 100 hour 

inspection. 

F. FAA Approval: 

The technical design aspects of this bulletin are FAA Approved. 

G. Manpower: 

Compliance with this bulletin will be approximately three (3) man-hours to complete the 

inspection and test and approximately one (1) man-hour to re-route the auxiliary fuel 

pump wire if required. 

Copyright 1999-2014 by MD Helicop ters Inc. 

This document may be rep roduced and distributed p rovided lW fee is charged, 

the text is not modified, and this copyright notice is included. 

II MANDATORY 11111111111111 MANDATORY 11111111111111 MANDATORY II 
SB369H-255 

SB369E-111 

SB500N-049 

SB369D-213 

SB369F-098 

DATE: 30 APRIL 2014 

PAGE 2 OF 10 

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SERVICE BULLETIN 

II MANDATORY 11111111111111 MANDATORY 11111111111111 MANDATORY II 

H. Interchangeability: 

None. 

I. Points of Contact: 

For further assistance, contact the Field Service Department at MDHI, Mesa, Arizona. 

Telephone 1-800-388-3378 or 480-346-6387. DATAFAX: 480-346-6813. 

J. Material/Part Availability: 

Contact MDHI Spare Parts Sales Department for parts availability. 

Telephone: 1-800-388-3378 Option 2 or 480-346-6540. DATAFAX: 480-346-6821. 

REPLACEMENT PARTS/SUPPLIES 

Nomenclature Part No. Qty. Source 

Gasket, Fuel Quantity Transmitter 369A4518 1 MD HI 

Decai,Warning- Start Pump MHS5861-66 1 MD HI 

Adhesive, Fast Setting MDM16-1068, Class 88 1 MDHI or Commercial 

Epibond 1217 AlB (1 oz 

(RM011959) (28G)) 

K. Warranty Policy: 

Contact the MDHI Warranty Department for prices, orders, and availability. 

Telephone: 1-800-388-3378 or 480-346-6403. DATAFAX: 480-346-6814. 

MDHI Warranty Department will give authorized Service Centers not more than 4 hours of 

labor credit (spares credit) to complete this modification. 

Standard warranty policy applies. 

L. Disposition of Parts Removed: 

N/A 

M. Tooling: 

N/A 

N. Weight and Balance: 

N/A 

0. Electrical Load Data: 

N/A 

P. Other Publications Mfected: 

NIA 

Q. Reference Publications: 

CSP-H-2 Basic Handbook of Maintenance Instructions 

Copyright 1999-2014 by MD Helicopters Inc. 

This document may be reproduced and distributed provided no fee is charged, 

the text is not modified, and this copyright notice is included. 

II MANDATORY 11111111111111 MANDATORY 11111111111111 MANDATORY II 
--- .-w 

HELICOPTERS 

.... ~ SB369H-255 

SB369E-111 

SB500N-049 

SB369D-213 

SB369F-098 

SERVICE BULLETIN DATE: 30 APRIL 2014 

PAGE 3 OF 10 

II MANDATORY 11111111111111 MANDATORY 11111111111111 MANDATORY II 

CSP-H-7 Illustrated Parts Catalog 

CSP-HMI-2 Basic Handbook of Maintenance Instructions - Servicing and Maintenance 

CSP-IPC-4 Illustrated Parts Catalog 

2. ACCOMPLISHMENT INSTRUCTIONS 

A. Get Access to the LH Fuel Cell Cover Assembly 

(1). Make sure all electrical power is off. 

(2). Get access to the LH fuel cell cover assembly. Refer to CSP-H-2, Section 12 or CSPHMI-2, Section 28-00-00, as applicable. 

B. Remove the Fuel Quantity Sensor 

... W_A_R_N-IN_G..,I 

Use all necessary precautions consistent with safe practice when working in or 

around fuel cells. 

Care shall be taken not to damage fuel float arm or low fuel level warning contact 

spring while accomplishing this bulletin. 

(1). Disconnect the wire harness from the fuel quantity sensor (1, Figure 1). 

(2). Cut and remove the lockwire (3) from the five bolts (4) that attach the fuel quantity 

sensor (1) to the support assembly (6). 

(3). Remove the five bolts (4) and five washers (5) from the fuel quantity sensor (1). 

(4). Carefully lift the fuel quantity sensor (1) up and out of the support assembly (6). 

Remove and discard the fuel quantity sensor gasket (2). 

C. Inspect Auxiliaey Fuel Pump Assembly Wire Routing 

(1). Use a shop mirror and flashlight to inspect the auxiliary fuel pump wire routing. Refer 

to Figure 2. The auxiliary fuel pump wire must be wrapped around the LH fuel cell fuel 

inlet hose assembly a minimum of one revolution. 

(2). If the auxiliary fuel pump wire is wrapped around the LH fuel cell fuel inlet hose, 

re-install the fuel quantity sensor (Ref. Step 2.D.), then go to Step 2.F. 

(3). If the auxiliary fuel pump wire is not wrapped around the LH fuel cell fuel inlet hose, 

re-install the fuel quantity sensor (Ref. Step 2.D.), then go to Step 2.E. 

Copyright 1999-2014 by MD Helicopters Inc. 

This document may be reproduced and distributed provided no fee is charged, 

the text is not modified, and this copy right notice is included. 

II MANDATORY 11111111111111 MANDATORY 11111111111111 MANDATORY II 
SB369H-255 

SB369E-111 

SB500N-049 

SB369D-213 

SB369F-098 

DATE: 30 APRIL 2014 

PAGE 4 OF 10 

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II MANDATORY 11111111111111 MANDATORY 11111111111111 MANDATORY II 

D. Install the Fuel Quantity Sensor 

(1). Install a new fuel quantity sensor gasket (2, Figure 1) on the fuel quantity sensor (1). 

(2). Install the fuel quantity sensor in the support assembly and secure with five bolts (4) 

and five washers (5). Lockwire (3) the five bolts. 

(3). Connect the wiring harness connector to the fuel quantity sensor (1). 

(4). Go to Step 2.F. 

E. Route the Auxiliary Fuel Pump Wire Around the LH Fuel Cell Fuel Inlet Hose 

(1). Loosen the nut on the cable clamp and disconnect control cable (7, Figure 1) from fuel 

shutoff valve (8). 

(2). Disconnect the LH fuel cell fuel inlet hose assembly (9) from the LH fuel cell fuel shutoff 

valve (8) assembly. 

(3). Disconnect the wiring harness connector from the auxiliary fuel pump wire (13) 

connector at the LH fuel cell cover (6). 

(4). Remove the bolts (13) and washers (14) securing the LH fuel cell cover (6) to the LH fuel 

cell. Carefully pry up the edge of the fuel cell cover (6) to break loose from the LH fuel 

cell. 

(5). Remove the auxiliary fuel pump connector jam nut (13) and remove the connector from 

the LH fuel cell cover. 

(6). Wrap the auxiliary fuel pump wire around the LH fuel cell fuel inlet hose, a minimum of 

one revolution, in such a way that it cannot interfere with the operation of the fuel 

quantity sensor float. Refer to Figure 2. 

(7). Install the auxiliary fuel pump wire thru the LH fuel cell cover (6, Figure 1) and secure 

with hex nut (13). 

(8). Re-seat the LH fuel cell cover (6) on the LH fuel cell and secure with washers (14) and 

bolts (13). 

(9). Go to Step 2.F. 

Copyright 1999-201 4 by MD Helicopters Inc. 

This document may be reproduced and distributed provided no fee is charged, 

the text is not modified, and this copy right notice is included. 

II MANDATORY 11111111111111 MANDATORY 11111111111111 MANDATORY II 
---. .,~ ...-w HELICOPTERS 

SB369H-255 

SB369E-lll 

SB500N-049 

SB369D-213 

SB369F-098 

SERVICE BULLETIN DATE: 30APRIL2014 

PAGE 5 OF 10 

II MANDATORY 11111111111111 MANDATORY 11111111111111 MANDATORY II 

8 

13 

n--n 

7 

F-=~~~~ OUTING OF START PUMP 

CAUSE INTERFERENCE 

E FUEL QUANTITY 

FLOAT ARM RESULTION 

ONEOUS FUEL QUANTITY 

N. REFER TO HELICOPTER 

TENANCE MANUAL FOR PROPER 

L TANK COVER. FUEL QUANTITY 

NSMITTER, AND START PUMP 

TALLATRION PROCEDURES. 

Figure 1. Fuel Cell Cover and Components 

Copyright 1999-2014 by MD Helicopters Inc. 

This document may be reproduced and distributed provided no fee is charged, 

the text is not modified, and this copyright notice is included. 

9 

10 

88-647 

II MANDATORY 11111111111111 MANDATORY 11111111111111 MANDATORY II 
SB369H-255 

SB369E-111 

SB500N-049 

SB369D-213 

SB369F-098 

DATE: 30 APRIL 2014 

PAGE 6 OF 10 

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II MANDATORY 11111111111111 MANDATORY 11111111111111 MANDATORY II 

Item 

1. 

2. 

3. 

4. 

5. 

6. 

7. 

Legend (Ref. Figure 1) 

Nomenclature Item Nomenclature 

Fuel Quantity Sensor 8. Fuel Shut-off Valve 

Fuel Quantity Sensor Gasket 9. LH Fuel Cell Fuel Inlet Hose Assembly 

Lockwire 10. Bolt 

Bolt 11. Washer 

Washer 12. Start Pump Warning Decal 

LH Fuel Cell Cover 13. Auxiliary Fuel Pump Wire 

Control Cable 

Copy right 1999-201 4 by MD Helicopters Inc. 

This document may be rep roduced and distributed p rouided no fee is charged, 

the text is not modified, and this copyright notice is included. 

-

II MANDATORY 11111111111111 MANDATORY 11111111111111 MANDATORY II 
---... 

HELICOPTERS 

~ ~

SERVICE BULLETIN 

SB369H-255 

SB369E-111 

SB500N-049 

SB369D-213 

SB369F-098 

DATE: 30 APRIL 2014 

PAGE 7 OF 10 

II MANDATORY 11111111111111 MANDATORY 11111111111111 MANDATORY II 

FUEL INLET HOSE 

AUXILIARY 

PUMP WIRE 

FUEL~ 

-----------------

..--------..,~ AUXILIARY FUEL PUMP 

Figure 2. Auxiliary Fuel Pump Wire Routing 

Copyright 1999-2014 by MD Helicopters Inc. 

This document may be reproduced and distributed provided no fee is charged, 

the text is not modified, and this copyright notice is included. 

88-646 

II MANDATORY 11111111111111 MANDATORY 11111111111111 MANDATORY II 
SB369H-255 

SB369E-111 

SB500N-049 

SB369D-213 

SB369F-098 

DATE: 30 APRIL 2014 

PAGE 8 OF 10 

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SERVICE BULLETIN 

II MANDATORY 11111111111111 MANDATORY 11111111111111 MANDATORY II 

F. Perform a Fuel Quantity Sensor (Transmitter) Functional Check 

NOTE: This functional check is not for fuel quantity indicating system accuracy, but to check proper fuel 

float arm function. 

(1). Do a fuel quantity sensor functional check. Refer to CSP-H-2, Section 12 or CSPHMI-2, Chapter 28-00-00. 

G. Install the Warning Decal 

(1). Clean the top of the LH fuel cell cover (6, Figure 2) using isopropyl alcohol and a clean 

cloth. 

(2). Install the warning decal (12) on the LH fuel cell cover (6). 

(3). Edge seal (fillet) the decal (12) using MDM16-1068D, Class 8B, fast cure adhesive. The 

fillet shall be 0.03 inch (0.8 mm) minimum and 0.13 inch (3.2 mm) maximum. 

H. Service the Fuel System 

(1). Make sure fuel system is properly serviced per SB369HN-185 and CSP-H-2 for 369H 

Series helicopters and CSP-HMI-2 for 369D, 369E, 369F/FF, and 500N Series helicopters. 

I. Job Close-Up 

(1). Clean any fuel spillage using a clean cloth. 

(2). Install the LH fuel access door assembly. Refer to CSP-H-2 for 369H Series helicopters 

and CSP-HMI-2 for 369D, 369E, 369F/FF, and 500N Series helicopters. 

J. Compliance Record 

(1). Record compliance to this Service Bulletin in the Compliance Record section of the 

Rotorcraft Log Book. 

(2). Complete Bulletin Completed Record form (attached) and FAX or e-mail to MDHI Field 

Service Department. 

Copyright 1999-2014 by MD Helicopters Inc. 

This document may be reproduced and distributed provided IW fee is charged, 

the text is not modified, and this copyright notice is included. 

II MANDATORY 11111111111111 MANDATORY 11111111111111 MANDATORY II 
__ ............. ~ 

... ...., HELICOPTERS 

SERVICE BULLETIN 

SB369H-255 

SB369E-111 

SB500N-049 

SB369D-213 

SB369F-098 

DATE: 30 APRIL 2014 

PAGE 9 OF 10 

II MANDATORY 11111111111111 MANDATORY 11111111111111 MANDATORY II 

Bulletin Completed Record 

ONE-TIME INSPECTION OF FUEL PUMP HARNESS ROUTING AND 

DECAL INSTALLATION 

MD Helicopters, Inc. 

Field Service Department 

4555 E. McDowell Road 

Mesa, AZ 85215-9734 

800-388-3378 Phone (U.S. and Canada) 

480-346-6387 Phone (International) 

480-346-6813 Fax 

FAX this form to MDHI (480) 346-6813 or E-mail to ServiceEngineering@mdhelicopters.com 

Owner 

/Operator: 

Address: 

Phone: 

E-mail: 

Helicopter 

Serial No: 

Helicopter 

Total Time: 

Date Complete: 

Location: 

This bulletin is complete: 

Comments: 

(Signature) 

(Print Name) 

(Title) 

Copyright 1999-2014 by MD Helicopters Inc. 

This document may be reproduced and distributed provided no fee is charged, 

the text is not modified, and this copyright notice is included. 

II MANDATORY 11111111111111 MANDATORY 11111111111111 MANDATORY II 
SB369H-255 

SB369E-111 

SB500N-049 

SB369D-213 

SB369F-098 

DATE: 30 APRIL 2014 

PAGE 10 OF 10 

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SERVICE BULLETIN 

II MANDATORY 11111111111111 MANDATORY 11111111111111 MANDATORY II 

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Copyright 1999-2014 by MD Helicopters Inc. 

This document may be reproduced and distributed provided rw fee is charged, 

the text is not modified, and this copyright notice is included. 

II MANDATORY 11111111111111 MANDATORY 11111111111111 MANDATORY II