1 of 11

SERVICE BULLETIN

MANDATORY

Issued: August, 2010 SB 28-4039, REV. 1

Revised: October, 2011

The export of these commodities, technology or software are subject to the U.S. Export

Administration Regulations. Diversion contrary to U.S. law is prohibited. For guidance on

export control requirements, contact the Commerce Department's Bureau of Export

Administration at http://www.bis.doc.gov. 

Hawker Beechcraft Corporation (HBC) issues Service Information for the benefit of owners

and fixed base operators in the form of two classes of Service Bulletins. The first class,

Mandatory Service Bulletins (red border) includes changes, inspection and modifications that

could affect safety or crashworthiness. HBC also issues Service Bulletins with no red border

which are designated as either recommended or optional in the compliance section within the

bulletin. In the case of recommended Service Bulletins, HBC feels the changes,

modifications, improvements or inspections will benefit the owner/operator and although

highly recommended, Recommended Service Bulletins are not considered mandatory at the

time of issuance. In the case of Optional Service Bulletins, compliance with the changes,

modifications, improvements or inspections is at the owner/operator's discretion.

Both classes are available on the web at http://pubs.hawkerbeechcraft.com and mailed to:

(a) Owners of record on the FAA Aircraft Registration Branch List and the HBC

Safety of Flight Information (SOFI) List.

(b) Those having a publications subscription.

Information on Safety of Flight Information (SOFI) or subscription can be obtained through

the Hawker Beechcraft Corporation Technical Manual Distribution Center (TMDC). As

Mandatory Service Bulletins and Service Bulletins are issued, the Service Bulletin Master

Index will be updated and available online at http://pubs.hawkerbeechcraft.com. Warranty

will be allowed only when specifically defined in the Service Bulletin and in accordance with

HBC Warranty Policy.

Unless otherwise designated, HBC Mandatory Service Bulletins, Service Bulletins and HBC

Kits are approved for installation on HBC airplanes in original or HBC modified configurations

only. HBC Mandatory Service Bulletins, Service Bulletins and Kits may not be compatible

with airplanes modified by STC installations or modifications other than HBC approved kits.

SYNOPSIS OF CHANGE

This Service Bulletin has been revised to clarify the quantity and location of the fuel hose clamps within the

outboard section of each wing. Figure 3 was replaced and Figures 4 and 5 were added to illustrate the possible

component configurations. If the original issue of this Service Bulletin has been complied with, then no further

action is required. Relevant technical changes are marked with change bars in the outside margins.

1. Planning Information

A. Effectivity

(1) Airplanes

Model 58 Baron, Serials TH-1931 through TH-2124;

Model G58 Baron, Serials TH-2125 through TH-2281, TH-2283 and TH-2284.

If you are no longer in possession of the airplane, please forward this information to the present

owner.

(2) Spares

Not applicable. 

B. Reason

This Service Bulletin is being issued to address a quality escape regarding the fuel hose clamps located

within the outboard sections of both wings. Clamps may have been installed during manufacturing that

have a larger inside diameter than is required for the supported fuel hoses. An oversized or deformed

clamp does not close around the hose uniformly, creating the possibility of fuel leakage and a potential fire

hazard.

TITLE: FUEL - INSPECTION / REPLACEMENT OF FUEL VENT HOSE CLAMPS
SERVICE BULLETIN

Issued: August, 2010

Revised: October, 2011

SB 28-4039, REV. 1

2 of 11

MANDATORY

C. Description

This Service Bulletin requires an inspection of the fuel hose clamps. If oversized clamps P/N NAS1924-22

are present, they shall be replaced with correct clamps P/N 62606.

D. Compliance

An Airworthiness Directive has been requested on the matter covered by this Service Bulletin.

Hawker Beechcraft Corporation (HBC) considers this to be a Mandatory Service Bulletin. It must be

accomplished at the next scheduled inspection, but no later than 50 flight hours or six (6) calendar months

from receipt of Revision 1 of this Service Bulletin, whichever occurs first.

E. Approval

The engineering data contained in this Service Bulletin is FAA approved. 

Prior to accomplishment, owners/operators of airplanes registered in countries other than the United

States shall consult with their local Aviation Regulatory Authority.

Incorporation of this Service Bulletin restores the airplane to original Type Design.

F. Manpower

The following information is for planning purposes only:

Estimated man-hours for inspection: 0.5 hours

Suggested number of personnel for inspection: 1

Estimated man-hours for defuel/refuel labor: 3 hours total

Estimated man-hours for maintenance labor: 3 hours total

Suggested number of personnel for maintenance: 2

The above is an estimate based on experienced, properly equipped personnel complying with this Service

Bulletin.

G. Weight and Balance

Negligible.

It is the responsibility of the owner/operator to maintain compliance with the applicable Airworthiness

Regulations.

H. Electrical Load Data

No change.

I. Software Accomplishment Summary

Not applicable.
SERVICE BULLETIN

Issued: August, 2010

Revised: October, 2011 3 of 11

SB 28-4039, REV. 1

MANDATORY

J. References

Baron Maintenance Manual (MM), P/N 55-590000-13G3 or subsequent revision, Chapters 12-10-00 and

28-00-00.

K. Publications Affected

Baron Illustrated Parts Catalog (IPC), P/N 58-590000-19N or subsequent revision, Chapter 28.

L. Interchangeability of Parts

Not applicable.

M. Warranty Credit 

Warranty credit for labor and parts to the extent noted under MANPOWER and MATERIAL will be allowed

on all affected airplanes. Claims for compliance with this Service Bulletin are to be filed as a W3-type claim

against SB 28-4039, Revision 1. HBC assumes no responsibility for fuel costs.

Warranty coverage offered in this Service Bulletin will expire six (6) calendar months from the last day of

the month Revision 1 of this Service Bulletin is issued. After this date, the owner/operator assumes the

responsibility for compliance cost. HBC reserves the right to void continued warranty coverage in the area

affected by this Service Bulletin until the date the Service Bulletin is accomplished by an HBC Authorized

Service Center (ASC).

The owner/operator should contact an HBC ASC to schedule the warranty work to be accomplished. The

HBC ASC must be rated to perform maintenance on the specific model of Hawker Beechcraft airplane.

The HBC ASC will submit the appropriate paperwork directly to the HBC Warranty Department for

warranty consideration. In the event that work cannot be accomplished at an HBC ASC, parts may be

purchased directly from Hawker Beechcraft Parts & Distribution (HBP&D) and a warranty claim for parts

ONLY should be submitted directly to the HBC Warranty Department.

After the Service Bulletin has been accomplished, a warranty claim must be submitted to HBC within 60

days of the Service Bulletin completion date.

2. Material Information

A. Materials - Price and Availability

On application to the following address:

Hawker Beechcraft Parts & Distribution (HBP&D)

10511 East Central Avenue

Wichita, KS 67206

USA

Phone: 316-676-3100 or 1-888-727-4344

Fax: 316-676-3222 or 316-676-3327

E-mail: HBC_Parts@hawkerbeechcraft.com

B. Industry Support

Not applicable.
SERVICE BULLETIN

Issued: August, 2010

Revised: October, 2011

SB 28-4039, REV. 1

4 of 11

MANDATORY

C. Airplanes

The following parts required for accomplishment of this Service Bulletin may be ordered through a Hawker

Beechcraft Authorized Service Center, HBP&D or obtained locally:

Hawker Beechcraft Corporation expressly reserves the right to supersede, cancel and/or declare obsolete,

without prior notice, any parts or publications that may be referenced in this Service Bulletin.

D. Spares

Not applicable.

E. Reidentified Parts

None.

F. Tooling - Price and Availability 

Non-explosive flashlight.

Handheld mirror.

3. Accomplishment Instructions

This Service Bulletin shall be accomplished as follows:

NOTE

Should any difficulty be encountered in accomplishing this Service Bulletin,

contact Hawker Beechcraft Corporation at 1-800-429-5372 or 316-676-3140. 

Observe all Warnings and Cautions contained in the airplane manuals

referenced in this Service Bulletin.

Whenever any part of this system is dismantled, adjusted, repaired or

renewed, detailed investigation must be made on completion to make sure

that distortion, tools, rags or any other loose articles or foreign matter that

could impede the free movement and safe operation of the system are not

present, and that the systems and installations in the work area are clean.

Part Number Description Quantity Per Airplane

62606 Clamp *As Required

* Serials with standard wing configuration (Serials TH-1931 thru TH-2124) - 10 clamps per wing

Serials with optional tip tank configuration (Serials TH-1931 thru TH-2119) - 10 clamps per wing

Serials with optional tip tank configuration (Serials TH-2120 thru TH-2124, TH-2125 thru TH-2281, 

TH-2283, TH-2284) - 8 clamps per wing
SERVICE BULLETIN

Issued: August, 2010

Revised: October, 2011 5 of 11

SB 28-4039, REV. 1

MANDATORY

A. Airplane

To avoid risk of injury to personnel and damage to the airplane, follow all

FUEL SYSTEM SAFETY PRECAUTIONS contained in the MM, Chapter 12

and Chapter 28, when performing inspections, servicing, operational

testing, fueling/defueling and/or maintenance on the airplane’s fuel system. 

(1) Remove all power from the airplane and disconnect the battery. Display warning notices prohibiting

reconnection of airplane electrical power.

(2) Inspect the fuel hose clamps within both outboard wing sections. Access doors are located between

Wing Stations 175.28 and 191.00.

(a) On left wing, remove three (3) access doors; two (2) on lower side and one (1) on upper side.

Refer to Figure 1.

(b) On right wing, remove two (2) access doors on lower side. Refer to Figure 2.

(c) With a mirror and a non-explosive flashlight, inspect areas for oversized/deformed clamps

around the fuel hoses. Refer to Paragraph 2.C. for the quantity of clamps, depending on

configuration. Refer to Figures 3, 4, and 5.

(i) Inspect for gaps between the clamp and the hose. Clamps must be replaced if they do not 

close uniformly around the hose, are not concentric, or do not fit securely on the hose. 

Review all fuel system safety precautions in the MM, Chapters 12 and 28,

before proceeding.

(ii) If oversized/deformed clamp(s) are present, defuel the airplane before replacing clamps. 

Refer to MM, Chapter 28-00-00.

(iii) If oversized/deformed clamps are not present, proceed to Step (6) below.

(3) Remove oversized/deformed clamp(s) and replace with new clamp(s), P/N 62606. 

(4) Refuel airplane to full capacity. Refer to MM, Chapter 12-10-00.

(5) Visually inspect for fuel leaks around the hose clamps.

(6) Install all wing access doors removed in Steps 2(a) and (b) above.

(7) Reconnect the airplane battery, remove warning notices, and restore power.

(8) Ensure all work areas are clean and clear of tools and miscellaneous items of equipment.

(9) Return airplane to service.
SERVICE BULLETIN

Issued: August, 2010

Revised: October, 2011

SB 28-4039, REV. 1

6 of 11

MANDATORY

B. Spares

Not applicable.

C. Record of Compliance

Upon completion of this Service Bulletin, make an appropriate maintenance record entry.
SERVICE BULLETIN

Issued: August, 2010

Revised: October, 2011 7 of 11

SB 28-4039, REV. 1

MANDATORY

Fuel Hose Access on Left Wing

Figure 1
SERVICE BULLETIN

Issued: August, 2010

Revised: October, 2011

SB 28-4039, REV. 1

8 of 11

MANDATORY

Fuel Hose Access on Lower Right Wing

Figure 2
SERVICE BULLETIN

Issued: August, 2010

Revised: October, 2011 9 of 11

SB 28-4039, REV. 1

MANDATORY

B403903.AI

DETAILA

B LEFT WING SHOWN

RIGHT WING SIMILAR

LOWER TANK

ACCESS DOOR

DETAILB

2 CLAMPS

2 CLAMPS

2 CLAMPS

2 CLAMPS

2 CLAMPS

UPPER 

ACCESS

DOOR

LOWER WING

ACCESS DOOR

A

 Fuel Hose Suspect Clamp Locations

Standard Configuration (Serials TH-1931 thru TH-2124)

Figure 3
SERVICE BULLETIN

Issued: August, 2010

Revised: October, 2011

SB 28-4039, REV. 1

10 of 11

MANDATORY

DETAILA

B403904.AI

2 CLAMPS

2 CLAMPS

LOWER TANK

ACCESS DOOR

LOWER WING

ACCESS DOOR

UPPER

ACCESS

DOOR

2 CLAMPS

2 CLAMPS

A

2 CLAMPS

LEFT WING SHOWN

RIGHT WING SIMILAR

 Fuel Hose Suspect Clamp Locations

Optional Tip Tank Configuration (Serials TH-1931 thru TH-2119)

Figure 4
SERVICE BULLETIN

Issued: August, 2010

Revised: October, 2011 11 of 11

SB 28-4039, REV. 1

MANDATORY

DETAILA

2 CLAMPS

2 CLAMPS

2 CLAMPS

LOWER TANK

ACCESS DOOR

LEFT WING SHOWN

RIGHT WING SIMILAR

LOWER WING

ACCESS DOOR

UPPER

ACCESS

DOOR

A

B403905.AI

2 CLAMPS

Fuel Hose Suspect Clamp Locations

Optional Tip Tank Configuration

(Serials TH-2120 thru TH-2124, TH-2125 thru TH-2281, TH-2283, TH-2284)

Figure 5