# AVStar Fuel Systems Mandatory Service Bulletin AFS-SB6: Revision 2

- Rights: © AVStar Fuel Systems. Filed by the FAA in regulations.gov docket FAA-2011-0547; AD 2011-15-10, 2012-03-06 incorporates this document by reference. Not covered by OpenAirDocs’ CC0 dedication.
- Document: [AVStar Fuel Systems Mandatory Service Bulletin AFS-SB6](https://openairdocs.org/service-documents/avstar/afs-sb6.md)
- Title as filed: U.S. DOT/FAA - Service Information
- Pages: 13
- PDF: https://openairdocs.org/files/sha256/39/da/39da0ff5743521c332e640335fd1699093753a536e696eb4a57e60b365b25cb4
- Page: https://openairdocs.org/service-documents/avstar/afs-sb6/file/39da0ff57435

## Text

Each page's text from the PDF; open the PDF at a page with #page=N.

### Page 1

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, RSA-
10DB2, 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.

### Page 2

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

### Page 3

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.

### Page 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: 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.

### Page 5

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

### Page 6

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

### Page 7

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

### Page 8

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

### Page 9

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

### Page 10

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

### Page 11

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

### Page 12

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

### Page 13

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.

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