Aircraft Alternators, Starters, Generators & Relays Service Bulletins Kelly Aircraft Power Systems Service Letters SB
Accessory Type
Series
Reason For Letter
SB 38
Alternators
ES-10024-1 [TCM: 656802]
Cracked rear housing at brush holder
SB 33
Alternators
ES-7024-11, -14
Alternator fan & pulley replacement
SB 21
Manuals
SB 18A
Alternators
ALE, ALT, ALU, ALX, ALY, ALZ, ANG Series ES-4032, 39
New series of alternators.
SB 17A
Alternators
ALE, ALT, ALU, ALX, ALY, ALZ, ANG Series ES-4032, 39
New series of alternators incorporating new slip ring end.
SB 16A
Alternators
ALE, ALT, ALU, ALX, ALY, ALZ, ANG Series ES-4032, 39
New series of alternators incorporating new slip ring end bearing.
SB A-112A
Starters
Magnaflite
Certain models of Magnaflite starter drives malfunctioning. Check SB for further information on serial number applicability.
Supercedure of OE-A1
Service Information Letters SIL 25
Starters
Magnaflite
Supercedure of Magnaflite starters with new E-Drive & X-Drive starters
SIL A-132
Starters
E-Drive & X-Drive
Duty cycle of new E-Drive & X-Drive Starters
SIL A-126
Starters
E-Drive
E-Drive starter certification & applicability Lycoming starter application data
SIL A-125A
Alternators
ES-6000, -7000
Terminal torques
SIL A-122R3
Manuals
SIL A-119
Voltage Regulators
VR515GA
Clarification on access, adjustment and specifications
SIL A-118
Starters
Bendix Drive Shafts
Modification to PN: MZ-326A A combination of PN: MZ-326 & -326A, a bendix drive shaft with 2 pinholes.
SIL A-116
Alternators
ALE, ALH, ALT, ALY, ALX, ALY, ALZ
Alternator brush holder and brushes NEW part number: ALU-2045BS → ALU-3045BS [Dual Field] ALE-2045BS → ALE-3045BS [Single Field]
SIL A-115
Aircraft Installations of Alternators
Aircraft
Alternators built in 2004 causing voltage regulators to trip, due to over voltage.
SIL 101
Voltage Regulators
Aircraft
Information on installation of alternators in parallel
Availability of manual OE-A2 Rev. 3
Prestolite Service Letters SB
Type
Model
Reason
ASM-15
Alternators
All belt driven except ALV
Ventilating fan inspection
ASM-14
Alternators
ALV-9500
Removal of shipping spacer PN: GJT-40F
ASM-13
Alternators
ALX-9402 ALX-9425
Gear driven alternator gear retaining nut: 11-13 ftlb
ASM-11
Voltage Regulators VSF-7200 /-7400
Bench testing of solid state regulators
ASM-10
Alternators
ALV-9400
Slip end bearing inspection & lubrication
ASM-9
Alternators
All belt driven except ALV installed on TCM New fan assembly part numbers
ASM-8
Alternators
All belt driven except ALV
New fan Assembly
ASM-7
Starters
All bendix drives
Maintenance of bendix drives
ASM-6
Alternators
ASM-5
Alternators
6400, 8400, 9400
Field terminal stud insulator replacement
ASM-4
Alternators
All
Aircraft with belt driven alternator charging system percautions
ASM-3
Aircraft
Voltage regulators
Unbalanced output in dual alternator installations using single regulator
ASM-2
Alternators
ALE, ALT, ALX, ALY, ALZ 6400, 8400, 9400
Loose slip ring end oil seal
ASM-1
Starters
MDB, MHB, MHJ
Brush replacement
Reprint of TCM SB M71-16
Lycoming Service Letter Equivalent SB SB 386
ASM-10
Type Alternators
Model ALV-9401L
Reason For Letter Slip ring bearing inspection & lubrication
Service Instructions Aircraft Installations of Alternators
Aircraft
Alternators built in 2004 causing voltage regulators to trip, due to over voltage.
SI 1330A
Alternators
Spring loaded Couplings
Installation of spring loaded couplings
SI 1283A
Alternators
Cog Belt & Pulley
Installation of cog belt and pulley PN: LW13347
SI 1266
Alternators
Alternators with “-G ”
Upon removal from engine, remove grounding plate, and install on replacement alternator
Alternators
6400, 8400, 9400
Field terminal stud insulator replacement
SI 1515
SI 1253
SIL A-115
ASM-5
SI 1249
SI 1237A
Engine
ASM-3; -4
Idler pulley assembly All
Aircraft with belt driven alternator charging system percautions
Voltage regulators
Unbalanced output in dual alternator installations using single regulator
Alternators
SI 1154L
Alternators, Generators, All Starters, Voltage Regulators
FAA Approved electric equipment for Lycoming Engines
SI 1121
Starters & Starter Gears
Geared Starters
Application of Starter fly wheels gears and Starters
SI 1025
All
Lycoming Engines 435, 480, 540
Recommended torques for accessories mounted on certain GEARED engines
Service Letter SL L189
ASM-11
Voltage Regulators
VSF-7200 /-7400
Bench testing of solid state regulators
TCM SB
Equivalent
Type
Model
Reason
CSB-96-1
Starters
TCM
Failure of clutch assembly 653575
M95-3B
Alternators
Ford gear driven
Alternator drive coupling inspection
M92-12
Alternators
TCM
649304/R, 649305/R belt torque
M89-5
Alternators
TCM Gear driven
Alternator and drive coupling inspection
M87-15
Alternators
All
Ground strap
M84-5
Alternators
TCM Gear driven
Gear driven alternator inspection
M81-15
Alternators
TCM Prestolite 100A
Alternator exchange
M81-12
Alternator brackets
TCM
Alternator brackets for 642266 & 643935
M76-7
Alternators
TCM 634021
Face drive gear lockplate
M75-30
ASM-10
Alternators
ALV-9400
Slip end bearing inspection & lubrication
M73-6R1
ASM-4
Alternators
All
Aircraft with belt driven alternator charging system percautions
Ford Alternators
G/TS/IO-540
Installation of Ford gear driven alternators, mounted AHEAD of № 5 cyl.
M71-16
Service Letters SIL-97-8
Alternators
TCM Gear Driven
Interference of TCM 24V/60A gear driven alternators with cranckcase bolts
SSI-06-6
Alternator Brackets
TCM Engine
Inspection of alternator mounting brackets
