ATA 63 — Main Rotor Drive(s)

6,045 parts classified under this chapter

Reliability rollup

100%Median scrap propensity

1,494 parts · 4,374 SDR reports

From FAA Service Difficulty Reports

Part Number	Description	Manufacturer	Airframe	ATA	Category	Status
20100	RELIEF VALVE	—	EC145	63	Hydraulics	unknown
20130922001	WASHER	—	Bell 212	63	Consumables / Hardware	OEM
2014ACR	GEAR TOOTH	—	—	63	Structures	OEM
204-010-428-001	Seal	—	Bell 412 Bell 204+1	63	—	OEM
204-010-428-001	Seal	—	Bell 412 Bell 204+1	63	—	OEM
204-010-441-003	Race	—	Bell 204 Bell 212	63	—	OEM
204-010-441-003	Race	—	Bell 204 Bell 212	63	—	OEM
204-011-131-107	Seal	—	Bell 204 Bell 212	63	—	OEM
204-011-131-107	Seal	—	Bell 204 Bell 212	63	—	OEM
204-011-132-001	Seal	—	Bell 204 Bell 212	63	—	OEM
204-011-132-001	Seal	—	Bell 204 Bell 212	63	—	OEM
204-076-162-001	Bushing Set	—	Bell 204	63	Electromechanical	OEM
204-076-168-001	Bearing	—	Bell 204	63	Electromechanical	OEM
204-076-290-007	Plug Assembly	—	Bell 206 Bell 407+5	63	Electromechanical	OEM
2040013763	BRAKE	—	Bell 204 Bell 212	63	Wheels & Brakes	OEM
204001736005	CHAIN	—	Bell 412 Bell 204+1	63	Flight Controls	OEM
204001994001	BEARING	—	Bell 204 Bell 212	63	unknown
20401077503	QUILL ASSY	Bell	Bell 204	63	Structures	OEM
2040111281	UNIVERSAL	—	Bell 204	63	Engine Accessories	OEM
204030913005	WASHER	—	Bell 212	63	Consumables / Hardware	OEM
204031927005	MOUNT	—	Bell 204	63	unknown	OEM
204031928009	MOUNT ASSEMBLY	—	Bell 204 Bell 212	63	Structures	OEM
204040009061	TRANSMISSION	Bell	Bell 204	63	Structures	OEM
204040016005	TRANSMISSION	—	—	63	Engine Accessories	OEM
204040102017	PINION ASSY	—	Bell 412 Bell 204+1	63	Engine Accessories	OEM
204040129001	RETAINER	—	Bell 206 Bell 204+1	63	Consumables / Hardware
204040131001	NUT	—	Bell 407 Bell 204	63	Consumables / Hardware	OEM
204040132001	BEARING RACE	—	Bell 206 Bell 407+1	63	Structures	OEM
2040401321	INNER RACE	—	Bell 206 Bell 204+1	63	Consumables / Hardware	OEM
204040135001	BEARING	—	Bell 204 Bell 212	63	unknown	OEM
2040401431	BEARING	—	Bell 204	63	unknown
204040145001	BEARING	—	Bell 412 Bell 204	63	unknown
204040231001	CLIP	—	Bell 204 Bell 214+1	63	Consumables / Hardware	OEM
20404029001	RETAINER	—	Bell 206 Bell 204+1	63	Consumables / Hardware
204040305001	SLEEVE ASSY	—	Bell 412 Bell 204	63	Structures	OEM
204040324005	SHAFT	—	Bell 412 Bell 204+1	63	Electromechanical	unknown
204040334009	COVER	Bell	Bell 204 Bell 412EP	63	Structures	OEM
204040353023	MAIN CASE	—	Bell 212	63	Structures	OEM
204040354001	CASE	—	Bell 204	63	unknown
204040355017	CASE	Bell	Bell 204 Bell 412EP	63	Structures	OEM
204040368001	VALVE	—	Bell 204 Bell 212	63	unknown	OEM
204040376003	PRESSURE SWITCH	—	Bell 206 Bell 412+1	63	Electromechanical	OEM
2040403763	PRESSURE SWITCH	—	—	63	Hydraulics	OEM
204040379003	QUILL ASSY	—	Bell 412 Bell 204	63	Electromechanical	OEM
204040386001	CASE ASSY	—	Bell 412 Bell 204+1	63	Structures	OEM
2040404009	PINION GEAR	—	Bell 204	63	Structures	OEM
204040424001	BEARING	—	Bell 204 Bell 212	63	unknown
204040620003	DRIVESHAFT	—	Bell 204 Bell 205	63	Engine Accessories	OEM
204040623109	BEARING	—	Bell 204	63	unknown
2040406235	BEARING	—	Bell 204	63	unknown