Volare [Borg Warner/Marvel Schebler/Facet/Precision] Carburetor Service Letters & Bulletins Volare [Borg Warner/Marvel Schebler/Facet/Precision]Carburetor SBs MA-4-5AA
MA-5
MA-5AA
MA-6
MA-6AA
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
SB-04B
X
X
X
X
X
X
X
X
X
X
X
SB-03
X
X
X X X X
X X
X
X X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
“FC” on housing see SB “AP” on housing see SB “FF” on data plate
“FF” on data plate
X
MSA-9
X
MSA-8
X
MSA-7
X
MSA-6 MSA-5 MSA-4 MSA-3
X X
X
SB-05A
X X
X
X
X
X
X
X
X
X
X
X
X
Reason for SB
Bowl to Throttle-body inspection for looseness Data plate tags removed from OEM carburetors and FAA PMA tags installed Correct throttle plate screw retention Removal of float bracket 178-47 from new floats made after 2010 by Volare Inspection of Accelerator Pump Plungers Unapproved repair practices Thread sealant in fuel passages Inspection and replacement of faulty Accelerator Pump Lever Assemblies Replacement of Weighted valves with Spring Loaded Valves Mixture control stop repair for HA-6 Carburetors Inspection of Mixture Control Stop for permissible wear: 0.046” Compliance of SB A1-78 Compulsory Supecedure of MSA-13
X
SB-06
SB-02A SB-01 MSA-14 MSA-13 MSA-12 MSA-11 MSA-10
Data plate stamp HA-6
MA-4-5
X X
MA-4SPA
X
MA-3SPA
X X X
MA-3PA
X
SB-17 SB-16 SB-15 SB-14A SB-13 SB-11 SB-10 SB-09 SB-08B SB-07A
MA-3A
Recurring
Obsolete
X
SB
“92” on data plate
Float clearance Wear of accelerator pump plunger's snap ring groove The replacement of floats with BLUE FOAM floats Use of unauthorized parts in carburetors Superseded by SB-17 Removal of METAL floats from FACTORY OVERHAULED carburetors Revision of Maintenance Manuals – Addition of NDT inspection Australian AVGas contamination Casting flaw lines 10-4240 → 10-4240-1 [Nozzle 47-852] 10-4252 → 10-4252-2 Modification: 10-4252-1 → 10-4252-12 [Nozzle 47-853] 10-4457 → 10-4457-1 10-3237 → 10-3237-1 Modification: 10-4439 → 10-4439-1 [Nozzle 47-851] 10-4895 → 10-4895-1 10-4894 → 10-4894-1 Modification: [Nozzle 47-850] 10-4115-1 → 10-4115-2 Improved retaining methods for HA-6 carburetors’ mixture valve Use of unauthorized parts in carburetors Consolidated Fuel system floats dated “10 91” replacement TBO periods for carburetors
Volare [Borg Warner/Marvel Schebler/Facet/Precision]Carburetor SBs MA-4SPA
MA-4-5
MA-4-5AA
MA-5
MA-5AA
MA-6
MA-6AA
HA-6
X X X X
MA-3SPA
X X
MA-3PA
X X
MSA-2 MSA-1 SB A2-90 SB A1-90 SB A1-88 SB A1-87 SB A1-86 SB A1-84 SB A1-82 SB A1-81 SB A1-79 SB A2-78 SB A1-78 SB A1-76 SB A1-71 SB A1-69 SB A5-67 SB A4-67 SB A2-67 SB A1-67 SB A3-66
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X X
X
X
X
X
X
X X X X X
X
SB A1-66 SB A2-65 SB A1-64 SB A6-63 SB A5-63 SB A4-63 SB A3-63 SB A1-63 SB A12-62 SB A11-62 SB A10-62 SB A9-62 SB A8-62 SB A7-62 SB A4-62 SB A1-62
“V” on data plate “MF” on data plate
“87” on data plate
X X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
“MF” on data plate
X X X X X X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X X
X
X
X
X
X
SB A2-66 X X X X X
Data plate stamp
MA-3A
Recurring
Obsolete
X X
SB
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
“64” on data plate
X
X
X
X
X
X
X
X X
X
X
X
“V” on data plate
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
“A1” on data plate
X
X X
X
X
Reason for SB
Replacement of two piece venturi with ONE piece venturi Replace composite floats with METAL floats Carburetor floats Primary and Main venturi Possible loose pin: 62-226 Carburetor return and inspection TBO frequency Plastic float replacement with METAL FLOATS Improved drain plugs Uneven float shaft & bracket wear Improve sealing of economizer channel plug Pump rod installation, improved methods Mixture control retaining method Carburetor cleaning Method of securing cam lever Excessive thread lube, causing fuel contamination Pump inlet check valve redesign New throttle shaft bushings Float clearance check Replacement of float clips Main venturi replacement Throttle spring A10-3965-12 → A10-4893 removal, A10-4115-1 → A10-4894 modification A10-4439 → A10-4895 AD: 64-27-2 revision A10-4057 & A10-4057-1 replaced with: 10-4404 Positive retraction attachment, float to valve Mechanical attachment, float to valve Safety wiring of screws, throttle body to bowl One-piece venturi for MA-4-5 Modification: A10-3878 → A10-3878-M [Piper Cherokee] New float valve assembly Improved seal installation Modification: A10-3878 → A10-3878-M [Mooney A/C] Improved Long-lok installation Overhaul frequencies Viton-tipped float valve Float bracket mounting screw holes with bottoming tap Retapping of float bracket mounting screw holes with 4-40 tap 10-3339 no longer available
Volare [Borg Warner/Marvel Schebler/Facet/Precision]Carburetor SBs
X X X
X
X
X
X
X
X
X
X
X
X X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X X X X
X
X
Data plate stamp
Reason for SB
HA-6
MA-6AA
MA-6
X
MA-5AA
X
MA-5
X
MA-4-5AA
MA-4SPA
X
MA-4-5
MA-3SPA
X X X
MA-3PA
X X X X X X X X X X X
SB A6-61 SB A5-61 SB A4-61 SB A3-61 SB A2-61 SB A1-61 SB A18-60 SB A17-60 SB 16-60 SB 15-60 SB 13-60 SB 12-60 SB A11-60 SB 10-60 SB 9-60 SB 5-60 SB 3-60 SB 12-59 SB 8-59 SB 4-59
MA-3A
X
Recurring
Obsolete
X X
SB
New solid rubber floats Automatic altitude bellows for A10-3847 Modification: A10-4401 → A10-4401-1 Float valve and seat replacement Modification: A10-4025-11 → A10-4025-12 Throttle body to bowl gaskets Servicing the throttle shaft o-rings Update on servicing Altitude Bellows Factory standards Notice for kits with Long-lok insert screws Notice for servicing altitude bellows New pump linkage with cotter pin holes Identification of Long-lok seats Long-lok inserts in seats Long-lok inserts in screws Proper float drop = 2 ¼” → 2 5/16 “ Modification: A10-4164 → A10-4164-1 Float drop settings New automatic altitude bellows Solid rubber floats
AvStar Direct Service Bulletins Pertaining to Volare [Borg Warner/Marvel Schebler/Facet/Precision Carburetors AvStar SB Volare SB Dataplate Stamp Reason For SB AFS-SB4 SB-13 Pump plungers for MA-3 carburetors AFS-SB3 SB-04 Brass float clearance in Volare carburetors AFS-SB2 SB-02 MF Use of Brass Floats in Volare carburetors AFS-SB1 SB-01 Use of unauthorized parts in carburetors
Kelly Aerospace Bulletins Pertaining to Volare [Borg Warner/Marvel Schebler/Facet/Precision]Carburetors Kelly SB Volare SB SB-32
Model
Data Plate stamp
MA-4-5; HA-6
Reason for SB Inspection of throttle valve screws
SL-37
SB-08
MA-4-5; MA-5; MA-6
SL-36
SB-06
HA-6
SL-35
SB-05
All
SL-34
SB-03
HA-6
SL-33
SB-11
All
Use of unapproved repair methods
SL-32
SB-10
All
Use of unauthorized thread sealant
SL-31
SB-09
MA-4-5; MA-5; MA-6
SL-30
SB-04
All
SL-29
SB-02
All
SL-28
SB-01
All
SL-27A
MSA-13
All
Replacement of Weighted valves with Spring Loaded Valves
Inspection of Mixture Control Stop for permissible wear: 0.046” Compliance of SB A1-78 Compulsory Supercedure of MSA-13 AP
Accelerator pump inspection
Inspection and replacement of faulty Accelerator Pump Lever Assemblies Brass float clearance in Volare carburetors MF
Use of Brass Floats in Volare carburetors Use of Unauthorized parts in Volare carburetors
MF
Use of Brass Floats in Precision carburetors
TCM Bulletins Pertaining to Volare [Borg Warner/Marvel Schebler/Facet/Precision] Carburetors TCM SB Volare SB
Model
Part Number
Data Plate stamp
Reason for SB
SB09-6
SB-05
All
Supecedure of MSA-13
SB09-5
SB-04
All
“FC” on housing see SB
Float clearance
SB09-3
SB-02
HA-6
“AP” on housing see SB
Wear of accelerator pump plunger's snap ring groove
SB09-2
SB-01
All
Use of unauthorized parts in carburetors
SB08-7
MSA-14
All
Inspection of throttle body/bowl screws for looseness
SID97-7
MSA-10
MA-4-5
Casting flaw lines
SID94-12
MSA-7
M88-15
SB A1-88
MA-4-5
Possible loose pin: 62-226
M73-12
SB A1-74
MA-3/-4-5
Updated parts Lists and Exploded Views
Modification:
10-4894
→ 10-4894-1
10-4115-1
→ 10-4115-2
[Nozzle 47-850]
Textron Lycoming Bulletins Pertaining to Volare [Borg Warner/Marvel Schebler/Facet/Precision]Carburetors Lycoming SB
Volare SB Model
SB582 SB504 SB498B SB494A SB483 SB481 SB436 SB434 SB409 SB366B SB352 SB330B SB310 SB297A SB258
MSA-13 MSA-4 MSA-2 MSA-1 SB A1-88 SB A1-87 SB A2-79A SB A1-79 MSA-14 SB 1-71 SB A3-66 SB A4-63
Part Number
Data Plate stamp
All MA-3, MA-4 MA-3, MA-4 All MA-4-5; MA-5; MA-6 MA-3PA HA-6 HA-6 All HA-6 All MA-4-5, MA-5, MA-6 MA-4-5 MA-4SPA
“FF” “92” “V” MF “87” 10-5243; 10-5206
10-5045; 10-5045-1 “V” “V” 10-3678-32
Reason for SB Removal of METAL floats from FACTORY OVERHAULED carburetors Consolidated Fuel system floats dated “10 91” replacement Replacement of two piece venturi with ONE piece venturi Replace composite floats with METAL floats Possible loose pin: 62-226 Carburetor return and inspection Carburetor contamination, replacement of carburetors Improve sealing of economizer channel plug Kit replacement Throttle body to bowl looseness Method of securing cam lever Retighten and lockwire throttle arm screw Main venturi replacement One-piece venturi for MA-4-5 Oil sump modification on all Piper aircraft equipped with 0-320 engines
Service Instructions SI1984A
All
SI1428
HA-6
SI1421
MS609/631
SI1413
SB A1-81
“C” after PN HA-6
SI1398
HA-6
SI1395A SI1393 SI1390 SI1373 SI1370
MA-4SPA MA-3PA HA-6 HA-6 HA-6
SB A2-78 SB A1-78
SI1305C
MA-4SPA
SI1271A SI1265A
MA-3PA All MA-3,MA-4, MA-4-5, MA-6
SI1206
SB A2-67
“A” after PN
SI1161
MA-6AA
SI1523
All
10-5243 10-5227 10-5221 10-4910 10-5220 10-5206-1
“C” after PN
“E” after PN
“N” after PN 10-5126
“M1” after SN
Initial Final Torque for hold ¼ - 20 40 inlb 96 inlb down nuts 5/16 – 18 90 inlb 204 inlb Modification: 10-5206-1, 10-5206-11, 10-5230 10-5238 10-5211-1 Modification: 10-5211 10-5200 10-5246 10-5200-1 Uneven float shaft & bracket wear New float valve P/N: 233-700 Modification: 10-4910 → 10-4910-1 Same as 10-5135 Modification: 10-5220 → 10-5220E Same as 10-5257 Modification: 10-5206-1 → 10-5206-11 [Idle tube: 229-585] Pump rod installation, improved methods Mixture control retaining method 10-5009 → 10-5009N Become 10-5135 Modification 10-5062 → 10-5062N [Nozzle: 47-828] Modification: 10-5126 → 10-5126 [Nozzle: 47-826-1] Replacement of throttle shaft assy. with serrated throttle arm and shaft Float clearance check Effective for carburetors with SN bellow AH-7-2249 installed on TVO-435-A1A, -B1A, -D1A, external packing on throttle shaft Application of AvStar Carburetors in Textron Lycoming engines
Service Letters SLL186
SB A1-78
HA-6
Mixture control retaining method
Volare [Borg Warner/Marvel Schebler/Facet/Precision] ADs and SB Equivalents AD
SB Equivalent
Model
Data plate stamp
Reason for SB
63-22-03
SB A4-63
MA-4-5
“V”
One-piece venturi
69-24-03
SB A1-69
All
“A1”
Excessive thread lube, causing fuel contamination
72-06-05
All
Throttle Arm securing technique
77-13-16
HA-6
Kit replacement
79-08-06
HA-6
Replacement of carburetor PN: 10-5243
88-02-04
SB A1-87
MA-3PA
89-04-02
SB A1-88
MA-4-5, MA-5, MA-6AA
93-19-04
MSA-4
MA-3A, -3PA, - 3SPA, -4SPA
94-25-04
SB A1-78, MSA-6
HA-6
98-01-06
MSA-2, -7, -8, -9
MA-3A, -3PA, - 3SPA, -4SPA
“87”
Carburetor return and inspection Possible loose 62-226 pins
“92”
Consolidated Fuel system floats dated “10 91” replacement Improved retaining methods for HA-6 carburetors’ mixture valve
“V”
One-piece venturi
