AVStar Fuel Systems, Inc.

1365 Park Lane South

Jupiter, FL 33458

www.avstardirect.com

MANDATORY SERVICE BULLETIN

DOCUMENT: AFS-SB6

REVISION: 2

THE FRACTURE OF A FUEL DIAPHRAGM STUD 

IN FUEL SERVOS 

ISSUED: APRIL 6, 2011

PAGE: 1 OF 13

Engineering aspects of this Bulletin are FAA approved.

Any questions regarding Service Bulletin are to be directed to AVStar Fuel Systems, Inc. at www.avstardirect.com, or call (561) 575-1560

1. APPLICABILITY

This Service Bulletin applies to RSA-5AB1, RSA-5AD1, RSA-10AD1, RSA-10DB1, RSA10DB2, RSA-10ED1 and RSA-10ED2 fuel servos overhauled or manufactured by AVStar 

Fuel Systems (AVStar) between May 21, 2010 and October 19, 2010. It also applies to fuel 

servos of any make (AVStar, Bendix, Precision, etc.) overhauled by others using AVStar 

Value Kits (P/N’s AVK-5AB1, AVK-5AD1, AVK-10AD1, AVK-10ED1 and AVK-10ED2) 

and/or Fuel Diaphragms (P/Ns AV2541801 and AV2541803) purchased from AVStar

between May 21, 2010 and October 19, 2010. A list of serial numbers of servos and lot 

numbers of the diaphragm assemblies affected by this Bulletin are included as Attachments

A and B and further can be found on our website at www.avstardirect.com.

2. REASON FOR PUBLICATION

There has been a report of a possible failure after 19 hours of an RSA-10ED1 fuel servo 

overhauled by AVStar that may involve the fuel diaphragm assembly. This report involved 

an aircraft that lost power and crashed. The fuel diaphragm assemblies being investigated 

are limited to those AVStar fuel diaphragm assemblies manufactured between May 21, 

2010 and October 19, 2010 and further limited to the lot numbers and/or servo serial 

numbers shown in Attachments A and B.

3. SAFETY FIRST

AVStar is committed to its customer’s safety through technical innovation. AVStar has no 

authority to compel owners to act responsibly and take prudent action to insure their and 

others safety, but the company believes compliance with this MANDATORY SERVICE 

BULLETIN is important and will insure a safer product.
AVStar Fuel Systems, Inc.

1365 Park Lane South

Jupiter, FL 33458

www.avstardirect.com

MANDATORY SERVICE BULLETIN

DOCUMENT: AFS-SB6

REVISION: 2

THE FRACTURE OF A FUEL DIAPHRAGM STUD 

IN FUEL SERVOS 

ISSUED: APRIL 6, 2011

PAGE: 2 OF 13

Engineering aspects of this Bulletin are FAA approved.

Any questions regarding Service Bulletin are to be directed to AVStar Fuel Systems, Inc. at www.avstardirect.com, or call (561) 575-1560

4. COMPLIANCE

THE POSSIBILITY EXISTS OF SERVO FAILURE WITHOUT WARNING WITH THE 

POTENTIAL OF A TOTAL LOSS OF POWER. IT IS RECOMMENDED THAT FLIGHTS 

BE LIMITED TO DELIVERING THE AIRCRAFT TO A SERVICE FACILITY.

If the fuel servo is an affected unit that was overhauled by AVStar, or if it contains an 

affected AVStar fuel diaphragm assembly installed by another facility, the servo is to be 

removed from the aircraft and returned to AVStar for immediate inspection and repair.

5. EVIDENCE OF COMPLIANCE

After replacement of the affected fuel diaphragm assembly, compliance with this service 

bulletin will be noted on the servo data tag by adding the mark SB6 as shown in Figs 3 and 

4 below.

 

Fig 3 Fig 4
AVStar Fuel Systems, Inc.

1365 Park Lane South

Jupiter, FL 33458

www.avstardirect.com

MANDATORY SERVICE BULLETIN

DOCUMENT: AFS-SB6

REVISION: 2

THE FRACTURE OF A FUEL DIAPHRAGM STUD 

IN FUEL SERVOS 

ISSUED: APRIL 6, 2011

PAGE: 3 OF 13

Engineering aspects of this Bulletin are FAA approved.

Any questions regarding Service Bulletin are to be directed to AVStar Fuel Systems, Inc. at www.avstardirect.com, or call (561) 575-1560

6. WARRANTY STATEMENT

Affected units must be returned directly to AVStar for repair or replacement at AVStar’s 

discretion upon validation and approval of Claim Form AFS-900-F98 and the assignment of 

a Return Material Authorization (RMA) number (See Claim Process below). In the event 

that a Value Kit or a separately purchased fuel diaphragm assembly from the affected lots 

was used to overhaul a fuel servo, AVStar will also repair or replace the servo as described 

above. There will be no charge to the customer for repair of the diaphragm assembly or 

replacement of the affected unit. However, in the event that AVStar elects to repair the 

diaphragm assembly rather than to replace the unit and evaluation of the unit indicates that 

additional repairs above and beyond those to the diaphragm assembly are required in order 

to insure airworthiness, the customer will be contacted and standard rates will apply. 

Unused fuel diaphragms included in Value Kits from the affected lots will be replaced at no 

charge.
AVStar Fuel Systems, Inc.

1365 Park Lane South

Jupiter, FL 33458

www.avstardirect.com

MANDATORY SERVICE BULLETIN

DOCUMENT: AFS-SB6

REVISION: 2

THE FRACTURE OF A FUEL DIAPHRAGM STUD 

IN FUEL SERVOS 

ISSUED: APRIL 6, 2011

PAGE: 4 OF 13

Engineering aspects of this Bulletin are FAA approved.

Any questions regarding Service Bulletin are to be directed to AVStar Fuel Systems, Inc. at www.avstardirect.com, or call (561) 575-1560

The Customer has the following options for reimbursement of removal and installation 

labor:

OPTION 1: AVStar will offer a removal and installation labor allowance in accordance with 

the following table at a maximum of $75 USD per hour. No other claims for financial 

compensation will be reimbursed. Customers selecting this option do so instead of the 

reimbursement under Options 2 or 3. Allowance

Normally

Aspirated

Turbo

TIO & TGIO-541

Heli

Normally

Aspirated

Heli Turbo

S/charged

IO-360 IO-540 TIO-540

4

Cyl

6

Cyl

8

Cyl

4

Cyl

6

Cyl

4

Cyl

6

Cyl

L2A AB1A5 AC1A5 AF1B AH1A AJ1A AE2A

(Hr) 2.5 2.5 1.5 2.5 2.5 2.0 2.5 2.5 2.5 2.5 2.0 2.0 2.0 2.5 3.0 2.0 8.0

OPTION 2: AVStar will offer a renewed Limited Warranty for each affected unit. The 

renewed Warranty shall be for 48 months or 900 engine hours from the date the repaired 

unit is returned (based on shipping date). This is a not a 48 month addition to the standard 

Limited Warranty. Customers selecting this option do so instead of the reimbursement 

under Options 1 or 3. 

OPTION 3: AVStar will offer a $300 credit towards the customer’s next servo overhaul. The 

credit will be valid for a 10 year period from the date the repaired unit is returned (based on 

shipping date). Customers selecting this option do so instead of the reimbursement under 

Options 1 or 2. 

The customer must select the desired Option on Claim Form AFS-900-F98 before signing

and returning it to AVStar.
AVStar Fuel Systems, Inc.

1365 Park Lane South

Jupiter, FL 33458

www.avstardirect.com

MANDATORY SERVICE BULLETIN

DOCUMENT: AFS-SB6

REVISION: 2

THE FRACTURE OF A FUEL DIAPHRAGM STUD 

IN FUEL SERVOS 

ISSUED: APRIL 6, 2011

PAGE: 5 OF 13

Engineering aspects of this Bulletin are FAA approved.

Any questions regarding Service Bulletin are to be directed to AVStar Fuel Systems, Inc. at www.avstardirect.com, or call (561) 575-1560

CLAIM PROCESS:

1. Complete Claim Form AFS-900-F98 (see Attachment C).

2. Submit to –

AVStar Fuel Systems, Inc.

1365 Park Lane South

Jupiter, FL 33458

Tel: (561) 575-1560

Fax: (561) 575-0795

Email: sb@avstardirect.com

3. Return the affected unit or fuel diaphragm assembly under the assigned RMA. The 

unit must be returned according to the packing and shipping instructions in the RMA.

No warranty consideration will be made until the customer has complied with the above 

claim process. However, requested special arrangements (made in writing) may be made 

for international customers. All other terms and conditions of AVStar’s Limited Warranty 

Policy shall apply.

7. ATTACHMENTS

A. Model, Part Number and Serial Number of affected servos

B. Lot numbers of affected fuel diaphragm assemblies

C. Claim Form AFS-900-F98
AVStar Fuel Systems, Inc.

1365 Park Lane South

Jupiter, FL 33458

www.avstardirect.com

MANDATORY SERVICE BULLETIN

DOCUMENT: AFS-SB6

REVISION: 2

THE FRACTURE OF A FUEL DIAPHRAGM STUD 

IN FUEL SERVOS 

ISSUED: APRIL 6, 2011

PAGE: 6 OF 13

Engineering aspects of this Bulletin are FAA approved.

Any questions regarding Service Bulletin are to be directed to AVStar Fuel Systems, Inc. at www.avstardirect.com, or call (561) 575-1560

ATTACHMENT A: Model, Part Number and Serial Number of affected servos

Model Part Number Serial Number

RSA-5AD1 2524054-10 4143

RSA-5AD1 2524243-11 10121

RSA-5AD1 2524450-9 10926

RSA-5AD1 2524450-8 11710

RSA-5AD1 2524145-12 13011

RSA-10ED1 2524556-9 15517

RSA-5AD1 2524054-11 17640

RSA-5AD1 2524550-8 18653

RSA-5AD1 2524145-12 18970

RSA-5AD1 2524297-10 19758

RSA-10AD1 2524163-15 20748

RSA-5AD1 2524590-7 23147

RSA-10AD1 2524163-13 24367

RSA-5AD1 2524450-9 27299

RSA-5AD1 2524450-9 27312

RSA-5AD1 2524590-8 27890

RSA-10AD1 2524163-13 31853

RSA-10ED1 2524273-12 34763

RSA-5AD1 2524213-10 35210

RSA-5AD1 2524054-10 35862

RSA-10ED1 2524273-12 36004

RSA-5AD1 2524590-7 36039

RSA-10ED1 2524273-12 37244

RSA-5AD1 2524590-8 37694

RSA-5AD1 2524590-8 38283

RSA-5AD1 2524450-9 40315

RSA-5AD1 2524590-8 43301

RSA-5AD1 2524550-8 45341

RSA-5AD1 2524590-8 47100

RSA-5AD1 2524147-13 47391

RSA-5AD1 2524905-2 49636

RSA-5AD1 2524054-11 51728

RSA-5AD1 2524054-10 54841

RSA-10ED1 2524582-8 55878
AVStar Fuel Systems, Inc.

1365 Park Lane South

Jupiter, FL 33458

www.avstardirect.com

MANDATORY SERVICE BULLETIN

DOCUMENT: AFS-SB6

REVISION: 2

THE FRACTURE OF A FUEL DIAPHRAGM STUD 

IN FUEL SERVOS 

ISSUED: APRIL 6, 2011

PAGE: 7 OF 13

Engineering aspects of this Bulletin are FAA approved.

Any questions regarding Service Bulletin are to be directed to AVStar Fuel Systems, Inc. at www.avstardirect.com, or call (561) 575-1560

Model Part Number Serial Number

RSA-5AD1 2524054-11 55976

RSA-5AD1 2524054-11 56017

RSA-5AD1 2524054-11 56869

RSA-10ED1 2524273-12 56963

RSA-10ED1 2524273-12 58153

RSA-5AD1 2524054-11 58950

RSA-5AD1 2524450-9 59779

RSA-10ED1 2524500-9 61438

RSA-5AD1 2524054-11 62352

RSA-10AD1 2524163-15 62439

RSA-10ED1 2524273-12 63114

RSA-5AD1 2524054-10 63834

RSA-5AD1 2524450-9 65906

RSA-5AD1 2524450-9 65951

RSA-5AD1 2524682-8 66456

RSA-5AD1 2524450-9 67459

RSA-10ED1 2524273-12 68116

RSA-10ED2 2524791-6 69673

RSA-5AD1 2524213-10 69915

RSA-10ED1 2524500-9 70706

RSA-5AD1 2524054-10 71201

RSA-10ED1 2524500-8 72078

RSA-10ED1 2524500-8 77459

RSA-10ED1 2524500-9 77528

RSA-5AD1 2524213-11 77945

RSA-5AD1 2524450-9 78337

RSA-10ED1 2524273-12 78829

RSA-10ED1 2524273-11 79040

RSA-10AD1 2524163-15 81485

RSA-10AD1 2524163-15 81493

RSA-10AD1 2524163-15 81504

RSA-5AD1 2524054-11 82235

RSA-5AD1 2524213-11 997411

RSA-10ED1 2524500-9 70017104

RSA-10AD1 2524757-7 70022001

RSA-10ED1 2524500-9 70027507

RSA-5AD1 2524054-11 70050502
AVStar Fuel Systems, Inc.

1365 Park Lane South

Jupiter, FL 33458

www.avstardirect.com

MANDATORY SERVICE BULLETIN

DOCUMENT: AFS-SB6

REVISION: 2

THE FRACTURE OF A FUEL DIAPHRAGM STUD 

IN FUEL SERVOS 

ISSUED: APRIL 6, 2011

PAGE: 8 OF 13

Engineering aspects of this Bulletin are FAA approved.

Any questions regarding Service Bulletin are to be directed to AVStar Fuel Systems, Inc. at www.avstardirect.com, or call (561) 575-1560

Model Part Number Serial Number

RSA-5AD1 2524450-9 70054102

RSA-5AD1 2549050-1 70080709

RSA-10ED1 2524500-9 70090105

RSA-10ED1 2524273-12 70091005

RSA-5AD1 2524054-11 70122706

RSA-5AD1 2524054-11 70129709

RSA-5AD1 2576536-2 70134206

RSA-5AD1 2576536-2 70141008

RSA-5AD1 2576536-2 70144804

RSA-5AD1 2524752-7 70147603

RSA-10ED1 2524273-12 70155003

RSA-5AD1 2576536-2 70156707

RSA-10ED1 2524500-9 70157203

RSA-5AD1 2524054-11 70162308

RSA-10ED1 2524500-9 70166004

RSA-5AD1 2576536-2 70176203

RSA-5AD1 2576536-2 70181608

RSA-5AD1 2524054-11 70185408

RSA-5AD1 2576536-2 70191803

RSA-10ED1 2576562-1 70193507

RSA-10ED1 2576554-1 70193607

RSA-5AD1 2576544-2 70194101

RSA-5AD1 2576536-2 70198302

RSA-5AD1 2524054-11 70204204

RSA-10ED1 2524273-12 70210808

RSA-10ED1 2524273-12 70216501

RSA-10ED1 2576554-2 70223303

RSA-10ED1 2576546-1 70225006

RSA-5AD1 2576544-3 70227101

RSA-5AD1 2576536-2 70229809

RSA-5AD1 2524297-10 70233107

RSA-5AD1 2576524-2 70233501

RSA-5AD1 2576536-2 70237609

RSA-5AD1 2576536-2 70245107

RSA-5AD1 2576536-2 70245509

RSA-5AD1 2576536-2 70248507

RSA-5AD1 2576536-2 70258309
AVStar Fuel Systems, Inc.

1365 Park Lane South

Jupiter, FL 33458

www.avstardirect.com

MANDATORY SERVICE BULLETIN

DOCUMENT: AFS-SB6

REVISION: 2

THE FRACTURE OF A FUEL DIAPHRAGM STUD 

IN FUEL SERVOS 

ISSUED: APRIL 6, 2011

PAGE: 9 OF 13

Engineering aspects of this Bulletin are FAA approved.

Any questions regarding Service Bulletin are to be directed to AVStar Fuel Systems, Inc. at www.avstardirect.com, or call (561) 575-1560

Model Part Number Serial Number

RSA-5AD1 2576536-2 70258401

RSA-5AD1 2524450-9 70261505

RSA-5AD1 2576536-2 70262409

RSA-5AD1 2576568-1 70267804

RSA-5AD1 2576536-2 70268006

RSA-10ED1 2524273-12 70271904

RSA-10ED1 2576554-2 70276607

RSA-5AD1 2576536-2 70277808

RSA-5AD1 2576536-2 70278709

RSA-5AD1 2576536-2 70280708

RSA-5AD1 2576536-2 70283304

RSA-5AD1 2576536-2 70283305

RSA-5AD1 2576536-2 70285102

RSA-5AD1 2576536-2 70285309

RSA-5AD1 2576536-2 70288203

RSA-5AD1 2576536-2 70288703

RSA-10AD1 2576630-4 70369801

RSA-10AD1 2576630-4 70382005

RSA-10AD1 2576630-4 70382107

RSA-10ED1 2576554-2 70392806

RSA-10ED1 2524273-12 70427704

RSA-5AD1 2576536-2 70523707

RSA-5AD1 2576536-2 70523709

RSA-10AD1 2576630-4 70664609

RSA-5AD1 2576536-2 70692709

RSA-5AD1 2576536-2 70709802

RSA-5AD1 2524054-11 70741105

RSA-5AD1 2576536-2 70742402

RSA-10ED1 2576546-3 70744606

RSA-5AD1 2576536-2 70773203

RSA-5AD1 2576586-1 70773909

RSA-10ED1 2524500-9 70784109

RSA-5AD1 2576536-2 70821407

RSA-10ED1 2576562-4 70879504

RSA-5AD1 2576586-1 70882910

RSA-10AD1 2576630-4 70885610

RSA-5AD1 2576586-1 70949408
AVStar Fuel Systems, Inc.

1365 Park Lane South

Jupiter, FL 33458

www.avstardirect.com

MANDATORY SERVICE BULLETIN

DOCUMENT: AFS-SB6

REVISION: 2

THE FRACTURE OF A FUEL DIAPHRAGM STUD 

IN FUEL SERVOS 

ISSUED: APRIL 6, 2011

PAGE: 10 OF 13

Engineering aspects of this Bulletin are FAA approved.

Any questions regarding Service Bulletin are to be directed to AVStar Fuel Systems, Inc. at www.avstardirect.com, or call (561) 575-1560

Model Part Number Serial Number

RSA-10AD1 2576630-4 70949509

RSA-5AD1 2576536-2 70979007

RSA-10ED1 2524500-9 87171200

RSA-10AD1 2524757-7 87361603

RSA-10ED1 2576562-4 770268101

RSA-5AD1 2576536-2 70A89708

RSA-10ED1 2576546-3 70AA0406

RSA-5AD1 2576536-2 70AJ4906

RSA-10ED1 2576546-3 70AM0309

RSA-10ED1 2576562-4 70AU0208

RSA-5AD1 2576536-2 70AU7110

RSA-5AD1 2576536-2 70AW2608

RSA-10ED1 2524273-12 70B08310

RSA-5AD1 2576544-3 70BM3207

RSA-10ED1 2524500-9 70CE4106

RSA-5AD1 2576536-2 70CJ8106

RSA-5AD1 2576586-1 70CM2106

AVX-5VA1 AVX3015006-1 AV014090

AVX-5VA1 AVX3015006-1 AV014091

AVX-5VA1 AVX3015006-1 AV014092

AVX-5VA1 AVX3015006-1 AV014103

AVX-5VA1 AVX3015008-1 AV014224

RSA-10ED1 61M26612-Y AV101358

RSA-10ED1 AV2576554-3 AV106683

RSA-10ED1 AV2576554-3 AV106684

RSA-5AD1 AV2576536-2 AV117671

RSA-5AD1 AV2576544-3 AV1176716

RSA-5AD1 AV2576544-3 AV1176717

RSA-5AD1 AV2576544-3 AV1176718

RSA-5AD1 AV2576544-3 AV1176719

RSA-5AD1 AV2576536-2 AV117672

RSA-5AD1 AV2576544-3 AV1176720

RSA-5AD1 AV2524450-9 AV1176721

RSA-5AD1 AV2524450-9 AV1176722

RSA-5AD1 AV2524450-9 AV1176723

RSA-5AD1 AV2524450-9 AV1176724

RSA-5AD1 AV2524450-9 AV1176725
AVStar Fuel Systems, Inc.

1365 Park Lane South

Jupiter, FL 33458

www.avstardirect.com

MANDATORY SERVICE BULLETIN

DOCUMENT: AFS-SB6

REVISION: 2

THE FRACTURE OF A FUEL DIAPHRAGM STUD 

IN FUEL SERVOS 

ISSUED: APRIL 6, 2011

PAGE: 11 OF 13

Engineering aspects of this Bulletin are FAA approved.

Any questions regarding Service Bulletin are to be directed to AVStar Fuel Systems, Inc. at www.avstardirect.com, or call (561) 575-1560

Model Part Number Serial Number

RSA-5AD1 AV2576536-2 AV117673

RSA-5AD1 AV2576536-2 AV117674

RSA-5AD1 AV2576536-2 AV117675

RSA-5AD1 AV2576536-2 AV119661

RSA-5AD1 AV2576544-3 AV1196616

RSA-5AD1 AV2576544-3 AV1196617

RSA-5AD1 AV2576544-3 AV1196618

RSA-5AD1 AV2576544-3 AV1196619

RSA-5AD1 AV2576536-2 AV119662

RSA-5AD1 AV2576544-3 AV1196620

RSA-5AD1 AV2524450-9 AV1196621

RSA-5AD1 AV2524450-9 AV1196622

RSA-5AD1 AV2524450-9 AV1196623

RSA-5AD1 AV2524450-9 AV1196624

RSA-5AD1 AV2524450-9 AV1196625

RSA-5AD1 AV2576536-2 AV119663

RSA-5AD1 AV2576536-2 AV119664

RSA-5AD1 AV2576536-2 AV119665
AVStar Fuel Systems, Inc.

1365 Park Lane South

Jupiter, FL 33458

www.avstardirect.com

MANDATORY SERVICE BULLETIN

DOCUMENT: AFS-SB6

REVISION: 2

THE FRACTURE OF A FUEL DIAPHRAGM STUD 

IN FUEL SERVOS 

ISSUED: APRIL 6, 2011

PAGE: 12 OF 13

Engineering aspects of this Bulletin are FAA approved.

Any questions regarding Service Bulletin are to be directed to AVStar Fuel Systems, Inc. at www.avstardirect.com, or call (561) 575-1560

ATTACHMENT B: Lot numbers of affected Fuel Diaphragms and Value Kits

Name Part Number Lot Number

Diaphragm AV2541801 L100515

Diaphragm AV2541803 L100515

Diaphragm AV2541801 L100672

Diaphragm AV2541803 L100672

Diaphragm AV2541801 L100758

Diaphragm AV2541803 L100758

Name Part Number Qty Lot Number

Value Kit AVK-10AD1 1 011975

Value Kit AVK-10AD1 1 014298

Value Kit AVK-10AD1 1 014698

Value Kit AVK-10ED1 4 013757

Value Kit AVK-10ED1 4 014413

Value Kit AVK-10ED1 4 014685

Value Kit AVK-10ED2 1 014405

Value Kit AVK-5AD1 18 013859

Value Kit AVK-5AD1 6 014078

Value Kit AVK-5AD1 6 014208

Value Kit AVK-5AD1 2 014450

Value Kit AVK-5AD1 5 014461

Value Kit AVK-5AD1 1 014638

Value Kit AVK-5AD1 5 014744

Value Kit AVK-5AD1 5 014798

Value Kit AVK-5AD1 2 014802
AVStar Fuel Systems, Inc.

1365 Park Lane South

Jupiter, FL 33458

www.avstardirect.com

MANDATORY SERVICE BULLETIN

DOCUMENT: AFS-SB6

REVISION: 2

THE FRACTURE OF A FUEL DIAPHRAGM STUD 

IN FUEL SERVOS 

ISSUED: APRIL 6, 2011

PAGE: 13 OF 13

Engineering aspects of this Bulletin are FAA approved.

Any questions regarding Service Bulletin are to be directed to AVStar Fuel Systems, Inc. at www.avstardirect.com, or call (561) 575-1560

ATTACHMENT C:

Claim Form AFS-900-F98 AVSTAR FUEL SYSTEMS, INC.

1365 Park Lane South

Jupiter, FL 33458

(561) 575-1560 (561) 575-0795 Fax

sb@avstardirect.com

www. avstardirect.com

Customer Information:

Customer Name: ________________________________________

Company Name: ________________________________________

Address: _______________________________________________

City: ____________________________State: __________________ Country: _____________________

Tel. No: __________________________ Fax No: __________________ email: ____________________

Aircraft Information:

Make: _______________________ Model: ___________________ Year: __________ Total Time: _____

“N” Number: _________________ Engine Model: __________________ Total Time on Engine: _______

Aircraft Use: Personal ________ Business________ (Selection will not affect Warranty)

Unit Information:

Name: Fuel Servo Model Number: __________ Part Number: _______________ Serial Number: _____________

Date Installed: ____________ Hours in Service: _______________ Date Removed: ______________

Reason for Claim: RETURNED FOR FUEL DIAPHRAGM REPLACEMENT PER SERVICE BULLETIN AFS SB6

INSTRUCTIONS

Complete ALL INFORMATION on this form and return by fax to (561) 575-0795 or email: sb@avstardirect.com to 

receive a Return Material Authorization Form.

Select Option below.

OPTON 1: (Labor reimbursement) Customer must sign & date:

OPTION 2: (Warranty extension) Customer must sign & date:

OPTION 3: (Service Credit) Customer must sign & date:

(A valid receipt for labor incurred will be required for reimbursement if Option 1 is selected.)

If an affected servo or fuel diaphragm assembly is in stock and unused, it must be returned to AVStar for 

repair. 

A RETURN MATERIAL AUTHORIZATION FORM WILL NOT BE PROVIDED UNTIL ALL INFORMATION IS 

RECEIVED AND VERIFIED. AFTER RECEIPT OF THE RETURN MATERIAL AUTHORIZATION FORM, THE 

AFFECTED UNIT OR DIAPHRAGM SHALL BE RETURNED BY FOLLOWING THE PACKAGING AND SHIPPING 

INSTRUCTIONS STATED ON THE RETURN MATERIAL AUTHORIZATION FORM.