Bendix Magnetos Service Letters & Bulletins

X X SB556. X. X. X. “B” Lower Right Quarter Shaft bushing, Steel instead of sintered Iron. X. SB553. X .... Revised timing procedures for IO-720. SI-1433. SB626.
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Bendix Magnetos Service Letters & Bulletins Bendix Magnetos Service Bulletins D-2000

D-3000

D-3200

X

X

X

X

X CSB668

X

X

CSB665A

X

X

X

CSB664

X

X

X

X SB663A

X

X

X

X

X

X

X

X

X

X

X

“W” Upper Right Quarter

X

SB659 SIL657A

X X

X

X

X

X

X

X

X

X

X

X

X

SIL656

X

SIL655 SB654

X

“G” Lower Right Quarter

SB653

X

SB652

X

SB651 SB650

X

X

X

X

X

SIL649

X

X X

SIL648

X

SIL647

X

X

X X

SIL646

X

X

X

X MSB645

All with Impulse Couplings

X MSB644

X

X

X

SB643A

X

X

X

X

X

X

X

X

“A” Lower Right Quarter

X

SIL642B X

X CSB641

“E” Upper Left Corner Yellow Dykem Dot

SIL640 X

SB639

All with Impulse Coupling

SB638

X

X

MSB636

X

SB635 SB634

X X

X

X SB631

X

X

X SB623A

All with Impulse Coupling

X

X

X

X

X

X SB619

X

X SB618

X

X SB617

X

X “F” Upper Right Quarter

X

“X” Upper Left Corner

X

“X” Upper Left Corner

X

SB614

“X” Upper Left Corner X

X

SB613

X

SB606

X X

X

SB605A

X

Reason for SB Magneto timing to engine.

SB660 X SB658

Data plate Stamp

X

X CSB662A SIL661

Vibrators

S-1200

X

Ignition Switches

S-200

X

Harnesses

S-20

Recurring

Incorporated in Manual

X MSB94-8D

SB

“R” Lower Left Corner “K” after SN “C” center bottom line

Inspection of Ignition Harness attachment plate Capacitor PN: 10-400615 BN: 0344 → 0417; REPLACE Capacitor PN: 10-400558 [BLACK TOP]; REPLACE Tachometer points, inspection & replacement Capacitors PN: 10-382807; 10-382681; 10-382681–1 BN: 9942 or less; REPLACE “BL” prefix to Factory Rebuilt magnetos Push-to-start switches malfunction Stop pin replacement for S-1225; -1227 Distributor gear maintenance New cover kits Relay vibrator supersedure New bearing PN: 10-400605 New capacitor PN: 10-400604 Hot Magneto Test Impulse coupling for D6LN-2013 Capacitor information Impulse coupling pins inspection & replacement Gear kits for S-1200 Conversion to “Shower of Sparks” ignition Product changes, mag replacement History of replacement coils and rotors Inspection of riveted impulse couplings, and replacement with snap-ring cam assemblies Replacement of coils [internally grounded] and rotors [flat sided] Maintenance intervals for all magnetos Serial number interpretation Possible open in capacitors PN: 10-349276 BN: 93-40 & 93-42 New format of documentation Coupling installation, torque: 180 – 300 inlb Revised assembly procedure of coupling: 10-400042 Possible open grounds, check for Hot Mag condition Gold seal harnesses, availability Replacement of PN: 10-357173 BN: 0690 10-357174 BN: 4289 → 1790 Anti seize compound on magneto shafts Soft flyweights, inspection Distributor gears loose electrodes. Check markings: X + O or L or Z Distributor gears loose electrodes. Check markings: X + O or L or Z Distributor gears loose electrodes. Check markings: X + O or L or Z Inspection & repair of “5” contact connector [bushing] Inspection of Green DAP Blocks due to loose bushings Removal of GREEN blocks from use Housing distortion, due to harness screws

Bendix Magnetos Service Bulletins Vibrators

Ignition Switches

Harnesses

D-3200

D-3000

D-2000

S-1200

S-200

S-20

Recurring

Incorporated in Manual

SB

Data plate Stamp

X

SB600

X

“B” Center

X

SB590A

X

“R” Before SN

X

X SB587

X

“S” Lower Right Corner

SB583 X

X

X SB556

X

X

X

X

SB553

X

X

X

X

X

X

X

X SB549

X

X

X

X

X

X

X

SB533A

X

SB531A

X

SB530

X

X SB518

“B” Lower Right Quarter

X X X X

X

X

X

X

X

Reason for SB Block bearing, tight fit Rotor clearance in housing Capacitor lead clamp terminals, inspection & repair Warning, testing and repair of switches Shaft bushing, Steel instead of sintered Iron Inspection of contacts bolt for looseness Carbon brush spring shoulder = 0.541” Inspection of relief fissures, flow lines and cracks in housings Information on longer harness operation life Coil clamp on single point, LH turning magnetos Contact block spring height = 0.422” [max]

Textron Lycoming SB Pertaining to Bendix Magnetos Lycoming SB SB576

Bendix SB SB663A

SB541

CSB662A

SB528

SB658

SB517

CSB641

SB516 SB515 SB508 SB464A

SB643 SB639 SB623A

SB461

Model S-20/-200

Data plate Stamp

D-3000

“W” Upper Right Quarter

Reason for SB Tachometer points, inspection & replacement Capacitors PN: 10-382807; 10-382681; 10-382681–1 BN: 9942 or less; REPLACE Distributor gear maintenance Possible open in capacitors PN: 10-349276 BN: 93-40 & 93-42 Maintenance & Inspection of Couplings Maintenance intervals for all magnetos Coupling installation, torque: 180 – 300 inlb Soft flyweights, inspection Distributor gears loose electrodes. Check markings:

All S-20 S-200 Impulse Coupling All All All with Couplings

“F” Upper Right Quarter

SB617

D-2000

“X” Upper Left Corner

SB460

SB619

D-3000

“X” Upper Left Corner

SB459

SB618

D-3200

“X” Upper Left Corner

SB458

SB613

S-1200

“R” Lower Left Corner

Inspection of Green DAP Blocks due to loose bushings

SB438A

SB605A

D-2000

“K” after SN “C” center bottom line

Housing distortion, due to harness screws

SB437 SB427

SB606 SB600

D-2000 D-2000

“B” Center

SB425C

MSB645

All

“A” Lower Right Quarter

SB415 SB410 SB376 SB347 SB341 SB340

SB590A SB587 SB556 SB551 SB549 SB530A

D-2000 D-2000 All All All S-1200

“E” Upper Left Corner Yellow Dykem Dot

“R” Before SN “S” Lower Right Corner “B” Lower Right Quarter

X + O or L or Z Distributor gears loose electrodes. Check markings:

X + O or L or Z Distributor gears loose electrodes. Check markings:

X + O or L or Z

Removal of GREEN blocks from use Block bearing, tight fit Inspection of riveted impulse couplings, and replacement with snap-ring cam assemblies Rotor clearance in housing Capacitor lead clamp terminals, inspection & repair Shaft bushing, Steel instead of sintered Iron Distributor block lube Carbon brush spring shoulder = 0.541” Coil clamp on single point, LH turning magnetos

Lycoming Service Instructions SI-1470 SI-1365

SB597

SI-1264 SI-1260 SI-1224

S-20 Harnesses S-1200

SB533

S-1200 S-1200

Change of Covers Cleaning plug ends Installing a moisture drain in covers of helicopter S-1200 at owner's discretion Relief fissures & cracks Timing adjustment of magnetos installed in VO-435-B1A

Obsolete Textron Lycoming SB Pertaining to Bendix Magnetos Impulse Coupling D-2000/-3000 S-20/-1200 D-3000 D-2000/-3000 D-2000/-3000 S-1200 D-2000 D-2000 S-1200 S-20/-200/-1200 SN-20/-21 “Lunchbox”

SB526 SB474 SB470 SB469 SB458 SB416 SB414 SB373 SB343 SB235A SB183A

SB629 SB628 SB625 SB613 SB584B SB589 SB566 SB551

Replacement of springs within 4 years Replacement of brown blocks due to arcing Removal of certain coupling springs from use Removal of certain distributor blocks from use Inspection of Green DAP Blocks due to loose bushings Coil retainers Rear bearing lubrication Introduction of nylon/metal washers New lubricant block Inspection of magnetos during periodic inspection Magneto timing discrepancies on “Lunchbox” magnetos

Lycoming Service Instructions SI-1470 SI-1444 SI-1433 SI-1400 SI-1382 SI-1375 SI-1367 SI-1332

SB630 SB626 SB608 SB592 SB603 SB588 SB573

S-20/-200

SI-1327

SB580

SI-1282

SB560

SI-1276 SI-1226 SI-1139 SI-1126 SI-1120/SI-1133

SB529 SB545 SB510/SB511 SB503 SB502

All with couplings S-1200/D-2000 S-20/S-200/S-1200 Dura blue Harnesses D-2000 S-1200 S-20/S-200/S-600 S-1200/D-2000 S-20/S-200/S-600 S-1200 S-20/S-1200 S-1200 S-600/S-700 All S-700

Replacement of S-20/-200 with SC-20/-200 Revised timing procedures for IO-720 Installation Introduction of self locking screws Capacitor flag terminal leads Radio noise Inspection of blocks for cracks Green DAP block inspection due to loose bushings Lock washers on screws Rotor and coil replacement Torque values for rotor nut Tubing for hold down screw Gears + Electrodes Lubrication of taper Magneto internal timing

Lycoming Service Letters SL-L207

SB625

S-20/-200

Broken coil clamp bolts in certain magnetos built in 1984

Bendix Magneto AD and SB equivalents AD 74-26-09 78-18-04 79-12-07

SB Equivalent SB556 SB590A SB606

Model All D-2000 D-2000

Data plate stamp

79-18-06

SB605

D-2000

80-17-14

SB605

D-2000

“K” after SN “C” center bottom line “K” after SN “C” center bottom line

81-12-06R1

SB618/SB619

D-3000

“X” Upper Left Corner

81-17-01

SB614

Vibrators

82-11-05

SB617

D-2000

“X” Upper Left Corner

82-13-01 82-20-01

SB613 SB623

S-1200 All with couplings

“R” Lower Left Corner

94-01-03R2

MSB644

S-20/S-200/S-1200

94-06-09

CSB641

S-20/S-200/S-1200

“E” Upper Left Corner Yellow Dykem Dot

05-12-06

SB639/MSB645

All with couplings

“A” Lower Right Quarter

“B” Lower Right Quarter “R” Before SN

“F” Upper Right Quarter

Reason for SB Shaft bushing, steel Rotor clearance in housing Removal of GREEN blocks from use Housing distortion, due to harness screws Housing distortion, due to harness screws Distributor gears loose electrodes. Check markings:

X + O or L or Z Inspection & repair of “5” contact connector [bushing] Distributor gears loose electrodes. Check markings:

X + O or L or Z Inspection of Green DAP Blocks due to loose bushings Soft flyweights, inspection Replacement of coils [internally grounded] and rotors [flat sided] Possible open in capacitors PN: 10-349276 BN: 93-40 & 93-42 Inspection of riveted impulse couplings, and replacement with snap-ring cam assemblies