PartsTable TECHNICAL DATA SHEET

NSN 1615-00-178-9990Government record, cited

Gear Box Assy, Tail1615-00-178-9990

NSN 1615-00-178-9990 · NIIN 001789990 · Part number S6135-66600-009

Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp · FSC 1615 — Helicopter Rotor Blades, Drive Mechanisms and Components · FSG 16 — Aircraft Components and Accessories · CAGE 78286

Government record, cited

NSN 1615-00-178-9990 — this item is cataloged by the U.S. Government under National Stock Number 1615-00-178-9990. Manufacturer of record part number: S6135-66600-009.

Also searched as 1615-00-178-9990 · 1615001789990 · NIIN 001789990 · 00-178-9990 · FSC 1615 Helicopter Rotor Blades, Drive Mechanisms and Components · CAGE 78286 · S6135-66600-009

Nearby stock numbers ← 1615-00-178-9502 Sleeve and Spindle · 1615-00-179-0088 →

Features

Gear Box Assy,tail — FSC 1615
1 manufacturer part number on file
Manufacturer of record: Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp

Identification

NSN: 1615-00-178-9990
NIIN: 001789990
FSC: 1615 — Helicopter Rotor Blades, Drive Mechanisms and Components
FSG: 16 — Aircraft Components and Accessories
Primary part number: S6135-66600-009
Manufacturer: Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp

General Description

The Gear Box Assy,tail, cataloged under National Stock Number 1615-00-178-9990, is classified within Federal Supply Class 1615 (Helicopter Rotor Blades, Drive Mechanisms and Components) of the Aircraft Components and Accessories group. The manufacturer of record is Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.

Catalog Facts

Item Name	Gear Box Assy,tail
FSC / FSG	1615 — Helicopter Rotor Blades, Drive Mechanisms and Components (FSG 16)
Manufacturers	Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp (CAGE 78286)

Technical Specifications

Parameter	Value
NSN	1615-00-178-9990
Primary Part Number	S6135-66600-009
Item Name	Gear Box Assy,tail
FSC / FSG	1615 / 16 — Helicopter Rotor Blades, Drive Mechanisms and Components
Manufacturer	Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp
Status	ACTIVE

Lifecycle & Compliance

Acquisition Status	ACTIVE
DEMIL Code	DEMIL B — Remove Demilitarization Key Points
Hazard	No hazard code in the DLA record (HMIC N)
Criticality Code	F

Cross-Reference Index

Part Number	Manufacturer
S6135-66600-009 PRIMARY	Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp (USA)

No interchangeability data on file.

Other items in FSC 1615 — Helicopter Rotor Blades, Drive Mechanisms and Components

Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.

1615-00-056-4862

1615-00-056-4862 · Item name not on file

1615-00-420-7841

1615-00-420-7841 · Item name not on file

1615-00-446-7576

GRIP ASSEMBLY,MAIN

1615-00-458-8376

HOUSING ASSEMBLY

1615-00-621-1853

TRANSMISSION,MECHANICAL,HELICOPT

1615-00-629-4445

1615-00-629-4445 · Item name not on file

1615-00-689-6306

STABILIZER,ROTARY WING

1615-00-689-6307

STABILIZER,ROTARY WING

Frequently Asked Questions

What is NSN 1615-00-178-9990?

NSN 1615-00-178-9990 is a Gear Box Assy,tail, manufactured by Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp, classified under FSC 1615, Helicopter Rotor Blades, Drive Mechanisms and Components. Status: active.

What part numbers are listed for NSN 1615-00-178-9990?

NSN 1615-00-178-9990 has 1 manufacturer part number on file: S6135-66600-009 (Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp).

Is NSN 1615-00-178-9990 hazardous material?

No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.

What is the DEMIL code for NSN 1615-00-178-9990?

NSN 1615-00-178-9990 has DEMIL Code B. Demilitarization may be required before disposal or transfer to non-military entities.

Sources

U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.

U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.

✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.

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