Attachment 0009 - Critical Characteristics.pdf

PDF 129 KB Posted Jul 6, 2026

Attached to: Solicitation for the Overhaul/Upgrade of the Mechanical Transmission for the UH-60 Black Hawk
Solicitation number: W58RGZ-26-R-0069
Issued by: Department of the Army Materiel Command Contracting Command Redstone Arsenal

About this file

Written by GovTribe AI · Jul 6, 2026

This is a Maintenance and Operations (M&O) Critical Safety Items document for the UH-60 helicopter transmission system, specifically the mechanical transmission identified as part number 70351-58100-051 with NSN 1615-01-701-8346, under Program AB906. The document provides a comprehensive listing of critical safety items and components that require specific manufacturing, inspection, and quality control procedures to ensure flight safety and operational reliability.

The document identifies approximately 35 critical parts and assemblies, including main module assemblies, gearbox guides, pinions, shafts, housings, bearings, seals, and various gears within the transmission system. Each item is cataloged with its part number, NSN, nomenclature, and CSI/date certification status. The parts are subject to multiple critical characteristics including torque specifications, hardness verification, magnetic particle inspection, surface temper etching, shot peen coverage verification, and dimensional tolerances. Serial number requirements, engineering test requirements, fatigue and endurance testing, and interchange capabilities are specified for each component. Approved replacement sources are identified, with Sikorsky Aircraft Corp (CAGE 78286) designated as the primary supplier, along with alternative qualified suppliers such as Regal Beloit America, Inc., Timken Company, SKF USA Inc., and others for specific bearing and seal components. All listed components require engineering test validation and many require fatigue and endurance testing certification, establishing rigorous supply chain control and quality assurance standards for this critical helicopter transmission system.

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M&O Critical Safety Items

Part Number

Yes - 7/15/2022Nomenclature

NSN70351-58100-051

CSI /

Date

Assembly, Main Module

1615-01-701-8346

M D I Critical Characteristic

Y Y Y Torque nut to value specified. After a 10-minute cool down period, retighten until no motion is felt at the specified torque level. After retightening, verification of 35625 in-lbs. Min torque is the C.C.

Y Y Y Assembly contains CSI P/N&#8217;s 70351-38170, 70351-38131, 70351-38110, 70351-38101, 70351-38114, 70351- 38122, 70351-38167, 70351-38146, 70351-38172, &amp; 70351-08227.

CAGE Approved Replacement (Spares) Source Name

78286 Sikorsky Aircraft Corp

Serial Number Req'd Engineering Test Req'd Fatigue Endurance Interchange

Yes Yes No Yes No

Output Part

Part Number

Yes - 1/1/2010Nomenclature

NSN70351-08227-041

CSI /

Date

Guide Assy, Main Gearbox

1615-01-078-5711

M D I Critical Characteristic

Y Y N Assembly Contains CSI

CAGE Approved Replacement (M&O) Source Name

78286 Sikorsky Aircraft Corp

Serial Number Req'd Engineering Test Req'd Fatigue Endurance Interchange

Yes Yes Yes No No

Part Number

Yes - 5/31/2017Nomenclature

NSN70351-08228-101

CSI /

Date

Guide, Main Gearbox

1615-01-432-9979

Serial Number Req'd Engineering Test Req'd Fatigue Endurance Interchange

Yes No No No No

PRI

AB906 Part Number

NomenclatureNSN System

Status70351-58100-051

TRANSMISSION, MECHAN,1615-01-701-8346 UH-60

Routine

Page 1 of 14M&O Critical Safety Items - AB906

M D I Critical Characteristic

Y N N Process per SS8043 to 7075-T73. The Critical Feature is the acceptance of the lot based on the test specimens as specified in SS8013.

Y Y N Plating not allowed in .125R undercut or in .250 radius

CAGE Approved Replacement (M&O) Source Name

78286 Sikorsky Aircraft Corp

Part Number

Yes - 2/13/2008Nomenclature

NSN70351-38101-042

CSI /

Date

Housing & Pinion Assy

3040-01-338-2993

M D I Critical Characteristic

Y Y N Assembly contains CSI

CAGE Approved Replacement (M&O) Source Name

78286 Sikorsky Aircraft Corp

Serial Number Req'd Engineering Test Req'd Fatigue Endurance Interchange

No Yes No Yes No

Part Number

Yes - 11/17/2017Nomenclature

NSN70351-38104-102

CSI /

Date

Pinion, Bevel, Input, Main

3040-01-314-1136

M D I Critical Characteristic

Y N N Verification of the RC30 min core hardness per note 16, measured on the surface specified is a Critical Characteristic.

Y N N Magnetic particle inspection per SS 8805.

N Y N Surface Temper Etch per DMWR 1-1615-372 after grinding repairs.

N Y N Magnetic Particle Inspection per ASTM-E-1444.

CAGE Approved Replacement (M&O) Source Name

78286 Sikorsky Aircraft Corp

Serial Number Req'd Engineering Test Req'd Fatigue Endurance Interchange

Yes Yes No Yes Yes

Part Number

Yes - 8/17/2015Nomenclature

NSN70351-38110-049

CSI /

Date

Housing Assy, Main Gearbox

3040-01-685-9876

Serial Number Req'd Engineering Test Req'd Fatigue Endurance Interchange

Yes Yes Yes No No

Page 2 of 14M&O Critical Safety Items - AB906

Y Y N .7500 DIA HIGH LIMIT (Sheet 6, Zone 6D)

Y Y N .7500 DIA HIGH LIMIT (Sheet 6, Zone 2B)

Y Y N .7500 DIA HIGH LIMIT (Sheet 5, Zone 3D)

Y Y N .6250 DIA HIGH LIMIT (Sheet 6, Zone 6C)

Y Y N 1.000 DIA HIGH LIMIT (Sheet 1, Zone 17D)

CAGE Approved Replacement (M&O) Source Name

78286 Sikorsky Aircraft Corp

Part Number

Yes - 11/17/2023Nomenclature

NSN70351-38114-101

CSI /

Date

Gear, Bevel, Main Module

3020-01-312-2584

M D I Critical Characteristic

Y N N Verification of the RC30 min core hardness per note 4, measured on the surface specified is a Critical Characteristic.

Y N N Magnetic particle inspection per SS 8805.

N Y N Surface Temper Etch per DMWR 1-1615-372 after grinding repairs.

N Y N Magnetic Particle Inspection per ASTM-E-1444.

CAGE Approved Replacement (M&O) Source Name

78286 Sikorsky Aircraft Corp

Serial Number Req'd Engineering Test Req'd Fatigue Endurance Interchange

Yes Yes No Yes Yes

Part Number

Yes - 2/4/2010Nomenclature

NSN70351-38122-102

CSI /

Date

Housing, Bearing Unit

3130-01-372-3042

M D I Critical Characteristic

Y N N Grind burn inspection per drwg 70351-38122, sheet 1, inspection requirements table

Y N N Magnetic particle inspection per drwg 70351-38122, sheet 1, inspection requirements table

N Y N Magnetic Particle Inspection per ASTM E1444.

CAGE Approved Replacement (M&O) Source Name

78286 Sikorsky Aircraft Corp

Serial Number Req'd Engineering Test Req'd Fatigue Endurance Interchange

Yes Yes No Yes No

Part Number

Yes - 12/18/2014Nomenclature

NSN70351-38131-043

CSI /

Date

Shaft Assy, M/R

3040-01-634-2460

Page 3 of 14M&O Critical Safety Items - AB906

Y Y Y Assembly contains CSI.

Y Y Y Nicks, dents, scratches, and tool or scuff marks within the CC area shall not exceed 0.0005 inches deep (acceptance limits per, SS9208, para 3.1).

CAGE Approved Replacement (M&O) Source Name

78286 Sikorsky Aircraft Corp

Serial Number Req'd Engineering Test Req'd Fatigue Endurance Interchange

Yes Yes Yes No No

Part Number

Yes - 5/31/2018Nomenclature

NSN70351-38131-102

CSI /

Date

Shaft, M/R

3040-01-666-7266

M D I Critical Characteristic

Y Y N Upper bearing journal 6.5024 Diameter Low Limit after plating.

Y Y N Upper bearing journal 0.059 minimum radius.

Y N N No step permissible at tangency of 4.000 and 3.000R to shaft inside diameter within limits of SS9208, Para. 3.1

Y Y N Shot Peen area coverage and verification is a C.C. All areas requiring shot peen coverage shall be inspected in accordance with Note 33 and 34.

Y Y Y Nicks, dents scratches and tool or scuff marks shall not exceed acceptance limits of SS9208, para 3.1

Y N N Hardness reading may be taken over entire shaft before final machining. After final machining, reading may be taken only in the areas indicated. Hardness reading (RC43-46) measured on the 6.840 diameter is the critical characteristic

Y Y N Resin coat application per SS8655 except viscosity requirements are waived. Apply baked resin inside of shaft and outside where noted to a maximum of .010 except as noted in Zone 10D, Sht 2. Coating coverage on the surfaces specified is the Critical Characteristic. Touch-up of baked resin allowed per note 30 in areas flagged with Note 30, and per Note 32 in areas flagged with Note 32.

CAGE Approved Replacement (M&O) Source Name

78286 Sikorsky Aircraft Corp

Serial Number Req'd Engineering Test Req'd Fatigue Endurance Interchange

Yes No No No No

Part Number

Yes - 9/9/2022Nomenclature

NSN70351-38146-041

CSI /

Date

Housing and Pinion Assembly

M D I Critical Characteristic

Y Y N Assembly contains CSI P/N’s 70351-38151

CAGE Approved Replacement (M&O) Source Name

78286 Sikorsky Aircraft Corp

Serial Number Req'd Engineering Test Req'd Fatigue Endurance Interchange

No Yes No Yes No

Page 4 of 14M&O Critical Safety Items - AB906

Yes - 9/9/2022Nomenclature

NSN70351-38146-043

CSI /

Date

Housing and Pinion Assembly

M D I Critical Characteristic

Y Y N Assembly contains CSI P/N’s 70351-38151.

CAGE Approved Replacement (M&O) Source Name

78286 Sikorsky Aircraft Corp

Serial Number Req'd Engineering Test Req'd Fatigue Endurance Interchange

No Yes No Yes No

Part Number

Yes - 9/1/2000Nomenclature

NSN70351-38151-101

CSI /

Date

PINION

3020-01-314-1686

M D I Critical Characteristic

Y Y Y The .140 minimum wall thickness measured axially at the .820 gage diameter

N Y N Magnetic Particle Inspection.

CAGE Approved Replacement (M&O) Source Name

78286 Sikorsky Aircraft Corp

Serial Number Req'd Engineering Test Req'd Fatigue Endurance Interchange

Yes Yes No Yes Yes

Part Number

Yes - 5/25/2001Nomenclature

NSN70351-38167-101

CSI /

Date

Gear, Bevel, Tail Takeoff

3020-01-270-3370

M D I Critical Characteristic

Y N N Verification of the RC30 min core hardness per note 4, measured on the surface specified is a Critical Characteristic.

Y N N Magnetic particle inspection per SS 8805.

N Y N Surface Temper Etch per DMWR 1-1615-372 after grinding repairs.

N Y N Magnetic Particle Inspection per ASTM-E-1444.

CAGE Approved Replacement (M&O) Source Name

78286 Sikorsky Aircraft Corp

Serial Number Req'd Engineering Test Req'd Fatigue Endurance Interchange

Yes Yes No Yes Yes

Page 5 of 14M&O Critical Safety Items - AB906

Yes - 8/17/2015Nomenclature

NSN70351-38170-042

CSI /

Date

Planetary Assy, Main Mod

M D I Critical Characteristic

Y Y Y Assembly contains CSIs

CAGE Approved Replacement (M&O) Source Name

78286 Sikorsky Aircraft Corp

Serial Number Req'd Engineering Test Req'd Fatigue Endurance Interchange

Yes Yes No Yes No

Part Number

Yes - 5/25/2021Nomenclature

NSN70351-38171-101

CSI /

Date

Pinion, Planetary Assy

M D I Critical Characteristic

Y N N Verification of the RC30 min core hardness per note 3, measured on the surface specified is a Critical Characteristic.

Y N N Magnetic particle inspection per SS 8805.

N Y N Surface Temper Etch per DMWR 1-1615-372 after grinding repairs.

N Y N Magnetic Particle Inspection per ASTM-E-1444.

CAGE Approved Replacement (M&O) Source Name

78286 Sikorsky Aircraft Corp

Serial Number Req'd Engineering Test Req'd Fatigue Endurance Interchange

No Yes No Yes No

Part Number

Yes - 5/25/2021Nomenclature

NSN70351-38172-101

CSI /

Date

Gear, Sun, Planetary Assy

3040-01-312-2572

M D I Critical Characteristic

Y N N Verification of the RC30 min core hardness per note 1, measured on the surface specified is a Critical Characteristic.

Y N N Magnetic particle inspection per SS 8805.

N Y N Surface Temper Etch per DMWR 1-1615-372 after grinding repairs.

N Y N Magnetic Particle Inspection per ASTM-E-1444.

CAGE Approved Replacement (M&O) Source Name

78286 Sikorsky Aircraft Corp

Serial Number Req'd Engineering Test Req'd Fatigue Endurance Interchange

Page 6 of 14M&O Critical Safety Items - AB906

Yes - 10/23/2012Nomenclature

NSN70351-38175-042

CSI /

Date

Carrier Assembly

1615-01-497-7256

M D I Critical Characteristic

Y Y N Assembly contains CSI P/N 70351-38175-103 with Critical Characteristics. The source of this assembly is required to certify that the proper Flight Safety Requirements of SS9211 are imposed on the supplier of the FSP. Verification that the FSP is in compliance with SS9211 (via the Flight Safety Star Stamp, Supplier Documentation, or other method approved by SIKORSKY) is the CC.

CAGE Approved Replacement (M&O) Source Name

78286 Sikorsky Aircraft Corp

Serial Number Req'd Engineering Test Req'd Fatigue Endurance Interchange

Yes No No No No

Part Number

Yes - 8/17/2015Nomenclature

NSN70351-38175-103

CSI /

Date

Carrier Plate

1680-01-534-8107

M D I Critical Characteristic

Y Y N PENETRANT INSPECTION ACCEPTANCE PER B/P NOTE 15 IS A C.C.

Y Y Y Nicks, dents, scratches, and tool or scuff marks within the CC area shall not exceed the acceptance limits of SS9208, PARA. 3.1. OR nicks, dents, scratches, and tool or scuff marks within the CC area shall not exceed 0.0005 inches deep.

Y Y N .590 (MIN R)

Y Y N .090 (MIN R)

Y Y N .055 (MIN R)

Y N N VERIFICATION THAT PLUS MATERIAL SPECIFIED IN NOTE 23 ON THE DRIVE SIDE DOES NOT EXCEED .00065 MAX

IS THE C.C.

Y Y N VERIFICATION OF SHOT PEEN COVERAGE IN AREAS INDICATED IS A C.C. SHOT PEEN, COVERAGE SHALL BE

INSPECTED IN ACCORDANCE WITH NOTE 27.

CAGE Approved Replacement (M&O) Source Name

78286 Sikorsky Aircraft Corp

Serial Number Req'd Engineering Test Req'd Fatigue Endurance Interchange

Yes Yes Yes No No

Part Number

Yes - 5/25/2021Nomenclature

NSN70351-38177-101

CSI /

Date

Gear, Ring, Planetary Assy

3020-01-312-2585

M D I Critical Characteristic

Y N N Hardness.

Y Y N Magnetic Particle Inspection.

Serial Number Req'd Engineering Test Req'd Fatigue Endurance Interchange

Page 7 of 14M&O Critical Safety Items - AB906

CAGE Approved Replacement (M&O) Source Name

78286 Sikorsky Aircraft Corp

Part Number

Yes - 6/7/2018Nomenclature

NSNSB2307-501

CSI /

Date

Bearing, Roller, Cylindrical

3110-01-312-9420

M D I Critical Characteristic

Y N N Surface Temper Etch inspect Pinion raceway after finish grinding at assembly stage per Note 6 of drawing.

Y N N MPI Pinion after finish grinding at assembly stage per Note 5 of drawing.

Y Y N Assembly contains CSI 70351-38171-101.

CAGE Approved Replacement (M&O) Source Name

92563 Regal Beloit America, Inc.

78286 Sikorsky Aircraft Corp

36069 Schaeffler Aerospace Canada Inc

Serial Number Req'd Engineering Test Req'd Fatigue Endurance Interchange

Yes Yes No Yes Yes

Part Number

NoNomenclature

NSNSB3612-102

CSI /

Date

Cone, Tapered, Roller Brg

3110-01-311-0023

M D I Critical Characteristic

CAGE Approved Replacement (M&O) Source Name

78286 Sikorsky Aircraft Corp

60038 Timken Company

Serial Number Req'd Engineering Test Req'd Fatigue Endurance Interchange

No Yes No Yes No

Part Number

NoNomenclature

NSNSB2561-101

CSI /

Date

Bearing, Roller, Cylindrical

3110-01-295-1941

M D I Critical Characteristic

CAGE Approved Replacement (M&O) Source Name

78286 Sikorsky Aircraft Corp

Serial Number Req'd Engineering Test Req'd Fatigue Endurance Interchange

Yes Yes No Yes No

Page 8 of 14M&O Critical Safety Items - AB906

78118 Timken Aerospace

32828 Kaydon Corporation

Part Number

NoNomenclature

NSNSB3409-201

CSI /

Date

Cup, Tapered, Roller Brg

3110-01-310-4634

M D I Critical Characteristic

CAGE Approved Replacement (M&O) Source Name

60038 Timken Company

78286 Sikorsky Aircraft Corp

9N206 The Timken Company DBA Phil Plant Div New Philadelphia Plant

Serial Number Req'd Engineering Test Req'd Fatigue Endurance Interchange

No Yes No Yes No

Part Number

NoNomenclature

NSNSB2307-101

CSI /

Date

Bearing, Roller, Cylindrical

3110-01-312-9420

M D I Critical Characteristic

CAGE Approved Replacement (M&O) Source Name

92563 Regal Beloit America, Inc.

78286 Sikorsky Aircraft Corp

Serial Number Req'd Engineering Test Req'd Fatigue Endurance Interchange

Yes Yes No Yes Yes

Part Number

NoNomenclature

NSNSB3504-102

CSI /

Date

Bearing, Roller, Tapered

3110-01-266-0893

M D I Critical Characteristic

CAGE Approved Replacement (M&O) Source Name

78286 Sikorsky Aircraft Corp

Serial Number Req'd Engineering Test Req'd Fatigue Endurance Interchange

No Yes No Yes No

Part Number NSNSB3220-101 3110-01-287-2969

Page 9 of 14M&O Critical Safety Items - AB906

NoNomenclature CSI / Date

Bearing, Roller, Tapered

M D I Critical Characteristic

CAGE Approved Replacement (M&O) Source Name

78286 Sikorsky Aircraft Corp

Serial Number Req'd Engineering Test Req'd Fatigue Endurance Interchange

No Yes No Yes No

Part Number

NoNomenclature

NSNSB8213-101

CSI /

Date

Seal, Plain

5330-01-320-8636

M D I Critical Characteristic

CAGE Approved Replacement (M&O) Source Name

78286 Sikorsky Aircraft Corp

Serial Number Req'd Engineering Test Req'd Fatigue Endurance Interchange

No Yes No Yes No

Part Number

NoNomenclature

NSNSB3313-202

CSI /

Date

Cup, Tapered, Roller Brg

3110-01-313-7469

M D I Critical Characteristic

CAGE Approved Replacement (M&O) Source Name

78286 Sikorsky Aircraft Corp

60038 Timken Company

Serial Number Req'd Engineering Test Req'd Fatigue Endurance Interchange

No Yes No Yes No

Part Number

NoNomenclature

NSN70968-08400-104

CSI /

Date

Seal, Plain Encased

5330-01-414-0690

M D I Critical Characteristic

Serial Number Req'd Engineering Test Req'd Fatigue Endurance Interchange

Page 10 of 14M&O Critical Safety Items - AB906

78286 Sikorsky Aircraft Corp

Part Number

NoNomenclature

NSN70351-08176-101

CSI /

Date

Gear, Spur, Oil Pump

3020-01-091-4828

M D I Critical Characteristic

CAGE Approved Replacement (M&O) Source Name

78286 Sikorsky Aircraft Corp

21540 Precision Gear Inc

Serial Number Req'd Engineering Test Req'd Fatigue Endurance Interchange

Yes Yes No Yes No

Part Number

NoNomenclature

NSNSB3409-101

CSI /

Date

Cone, Tapered, Roller Brg

3110-01-310-6064

M D I Critical Characteristic

CAGE Approved Replacement (M&O) Source Name

78286 Sikorsky Aircraft Corp

60038 Timken Company

Serial Number Req'd Engineering Test Req'd Fatigue Endurance Interchange

No Yes No Yes No

Part Number

NoNomenclature

NSNSB3504-202

CSI /

Date

Bearing, Roller, Tapered

3110-01-310-1116

M D I Critical Characteristic

CAGE Approved Replacement (M&O) Source Name

78286 Sikorsky Aircraft Corp

Serial Number Req'd Engineering Test Req'd Fatigue Endurance Interchange

No Yes No Yes No

Part Number NSNSB3220-201 3110-01-308-5608

Page 11 of 14M&O Critical Safety Items - AB906

NoNomenclature CSI / Date

Cup, Tapered, Roller Brg

M D I Critical Characteristic

CAGE Approved Replacement (M&O) Source Name

78286 Sikorsky Aircraft Corp

60038 Timken Company

Serial Number Req'd Engineering Test Req'd Fatigue Endurance Interchange

No Yes No Yes No

Part Number

NoNomenclature

NSNSB3217-101

CSI /

Date

Cone, Tapered, Roller Brg

3110-01-084-2532

M D I Critical Characteristic

CAGE Approved Replacement (M&O) Source Name

78286 Sikorsky Aircraft Corp

60038 Timken Company

Serial Number Req'd Engineering Test Req'd Fatigue Endurance Interchange

No Yes No Yes No

Part Number

NoNomenclature

NSNSB3313-102

CSI /

Date

Cup, Tapered, Roller Brg

3110-01-311-0022

M D I Critical Characteristic

CAGE Approved Replacement (M&O) Source Name

78286 Sikorsky Aircraft Corp

60038 Timken Company

Serial Number Req'd Engineering Test Req'd Fatigue Endurance Interchange

No Yes No Yes No

Part Number

NoNomenclature

NSNSB2205-101

CSI /

Date

Bearing, Roller, Cylindrical

3110-01-308-5607

Serial Number Req'd Engineering Test Req'd Fatigue Endurance Interchange

Page 12 of 14M&O Critical Safety Items - AB906

78286 Sikorsky Aircraft Corp

36069 Schaeffler Aerospace Canada Inc

Part Number

NoNomenclature

NSNSB3217-201

CSI /

Date

Cup, Tapered, Roller Brg

3110-01-084-2535

M D I Critical Characteristic

CAGE Approved Replacement (M&O) Source Name

78286 Sikorsky Aircraft Corp

60038 Timken Company

Serial Number Req'd Engineering Test Req'd Fatigue Endurance Interchange

No Yes No Yes No

Part Number

NoNomenclature

NSN70351-38115-101

CSI /

Date

Shaft, Outer, Main Bevel

3040-01-313-4191

M D I Critical Characteristic

CAGE Approved Replacement (M&O) Source Name

78286 Sikorsky Aircraft Corp

Serial Number Req'd Engineering Test Req'd Fatigue Endurance Interchange

Yes Yes No Yes No

Part Number

NoNomenclature

NSN70351-38800-101

CSI /

Date

Pump, Lube & Scavenge

4320-01-271-8461

M D I Critical Characteristic

CAGE Approved Replacement (M&O) Source Name

78286 Sikorsky Aircraft Corp

51663 Crane Company (Lear Romec Div)

Serial Number Req'd Engineering Test Req'd Fatigue Endurance Interchange

Page 13 of 14M&O Critical Safety Items - AB906

NoNomenclature

NSNSB2560-101

CSI /

Date

Bearing, Roller, Cylindrical

3110-01-289-3363

M D I Critical Characteristic

CAGE Approved Replacement (M&O) Source Name

78286 Sikorsky Aircraft Corp

78118 Timken Aerospace

38443 SKF USA Inc

Serial Number Req'd Engineering Test Req'd Fatigue Endurance Interchange

Yes Yes No Yes No

Part Number

NoNomenclature

NSNSS5089-08

CSI /

Date

Nut, Self-Locking, Double Hexagon

5310-00-866-5335

M D I Critical Characteristic

CAGE Approved Replacement (M&O) Source Name

78286 Sikorsky Aircraft Corp

56878 SPS Technologies LLC (Aerospace & Products Div)

Serial Number Req'd Engineering Test Req'd Fatigue Endurance Interchange

No Yes No No No

Page 14 of 14M&O Critical Safety Items - AB906

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