YHU-1B Bell 204 Series

 

 
Pototype Helicopter Utility-1Bravo

 

 

 

 

 

 

 

 

 

 

 

 

 

DATA

Powered by: One 960 SHP Lycoming T53-L-5 Turboshaft

Rotor Diameter: 44 ft. 0 in.

Fuselage Length: 39 ft. 0.35 in.

Empty Weight: 4515 lb.

Gross Weight: 8500 lb.

Maximum Speed: 138 M.P.H.

Range: 230 miles

 
 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 


OVERHAUL SCHEDUALE

 

MAIN ROTOR

204-011-101-3/5/9

HUB ASSEMBLY

1100 HRS.

 

TRANSMISSION

204-040-009-7/13/19/31/61

Transmission Assembly

1100 HRS.

205-040-263-3

Main Input Quill Assy.

1500 HRS.

204-040-366-9

Mast Assembly

1500 HRS.

 

 

TAIL ROTOR and DRIVE SYSTEM

204-040-003-7/13/19/23/29/37

42 Gear Box

1500 HRS.

204-040-012-13

90 Gear Box

1200 HRS.

 

MAST CONTROLS

204-011-400-1/3/5/7/9

Swashplate & Support Assy.

1100 HRS.

204-011-401-1/3/5/7/9

Scissors & Sleeve Assy.

1100 HRS.

204-010-370-3/5/7

Stabilizer Bar Assy.

conditional

 

POWER PLANT

T53-L-5

Engine

1200 HRS.

 

 

RETIREMENT SCHEDULE

 

MAIN ROTOR

204-011-001-15

Blade Assembly

1000 HRS.

MAIN ROTOR HUB

 

 

204-011-113-1

Strap Assy.

1200 HRS.

204-012-104-1/3/5

Strap Retention Pin

2400 HRS.

204-011-142-3

Clevis Drag Brace

3600 HRS.

 

TRANSMISSION

204-040-136-7

Mast Bearing

1500 HRS.

 

TAIL ROTOR AND DRIVE SYSTEM

204-011-702-11

Blade Assembly

1100 HRS.

TAIL ROTOR HUB

 

 

204-011-701-7/21/23

Hub Assembly

1100 HRS.

204-011-728-1

Grip

500 HRS.

204-011-722-1

YOKE Assy.

1000 HRS.

 

MAST CONTROLS

204-011-404-1

Swashplate Support

3300 HRS.

204-011-406-5/9

Scissors Lever Assy.

3600 HRS.

204-011-438-1

Collective Lever Assy.

2400 HRS.

STABILIZER BAR ASSEMBLEY

 

204-011-328-1

Stabilizer Bar Tube

5 yrs.

204-011-307-1

Center Frame Set

2400 HRS.

 

SYNCHRONIZED ELEVATOR

204-030-858-43-44

Elevator Assembly

3600 HRS.

204-001-937-5

Horn, Elevator Control

3600 HRS.

 

ROTATING CONTROL SYSTEM BOLTS

NAS1304-26D

Pitch Horn to Pitch Link

50/60 HRS.

Nas464-6-26

Pitch Horn to Pitch Link

50/60 HRS.

NAS1305-26D

Pitch Horn to Pitch Link

50/60 HRS.

NAS1304-26D

Pitch Link to Universal

400 HRS.

Nas1305-26D

Pitch Link to Universal

400 HRS.

NAS1304-30D

Universal to Mixing Lever

50/60 HRS.

NAS464-6-35

Universal to Mixing Lever

50/60 HRS.

NAS1304-30D

Drive Link to (204-010- 446-3) Trunnion

400 HRS.

 

 

 

 

 

NOTES:

 

1.        Redesigned Rotor Blades

2.        Enlarged cabin

3.        2 crew, 7 passengers or 3 stretchers

4.        Redesigned in 1962 from YHU-1B to YUH-1B

 

 

 

U.S. ARMY SERIAL NUMBERS