ENGINE - DESCRIPTION AND OPERATION
1. General
A. CF6-80 engine is composed of a compressor section, combustion section, turbine section, and an
accessory drive system. Each section (or system) is made up of subassemblies.
B. Engine is designed so that large subassemblies can be removed, exchanged, and installed
separately. This does not affect engine integrity or performance. It is termed modular construction.
C. Engine is a dual-rotor, axial-flow turbofan powerplant having a high bypass ratio. The 14-stage high
pressure compressor is driven by a 2-stage high pressure turbine, and the integrated front fan and
low pressure compressor is driven by a 4-stage low pressure turbine. An annular combustor
converts fuel and compressor discharge air into energy to drive the turbines. Accessory drive system
extracts energy from the high pressure compressor rotor to drive the engine-mounted accessories.
Reverse thrust for braking airplane after landing is supplied by an integrated system which acts on
fan discharge airflow. For a more detailed description of the thrust reverser system,
(PAGEBLOCK 78-30-00/001).
D. Engine Data:
ABX 001-007, 011, 012, 016-019, 021, 022, 025; CF6-80A ENGINES
Table 1/72-00-00-993-801-G00 CF6-80A ENGINE DATA
Nominal Thrust Class 48,000 lbs.
Installed Take off thrust (sea level, 92°F) 46,850 lbs.
Installed Climb Thrust (ECS on, at 35,000 ft.) 11,360 lbs.
Maximum temperature (flat take off rating) 92°F
Exhaust gas temperature redline 1,724°F (940°C)
Installed Cruise thrust (ECS on, at 35,000 ft.) 10,877 lbs.
Bypass ratio 4.66 to 1
Compressor pressure ratio 28 to 1
Specific fuel consumption (max. cruise, ECS on, at 35,000 ft.) 0.635 lbs/hr/l
Maximum N1 rpm 4,016 rpm (117%)
Maximum N2 rpm 10,859 rpm (110.5%)
Weight (bare engine) 8,496 lbs.
Nominal Engine Length 157 inches
Nominal Fan Diameter 86.4 inches
ABX 001-007, 011, 012, 016-019, 021, 022, 025, 101, 109, 114, 115, 314-999; CF6-80A2 ENGINES
Table 2/72-00-00-993-802-G00 CF6-80A2 ENGINE DATA
Nominal Thrust Class 50,000 lbs.
Installed Take off thrust (sea level, 92°F) 48,650 lbs.
Installed Climb Thrust (ECS on, at 35,000 ft.) 11,360 lbs.
Maximum temperature (flat take off rating) 92°F
Exhaust gas temperature redline 1,724°F (940°C)
767
AIRCRAFT MAINTENANCE MANUAL
CF6-80A SERIES ENGINES
72-00-00
NoC
Page 1
D633T1B7 Dec 22/2016
ECCN 9E991 BOEING PROPRIETARY - Copyright © Unpublished Work - See title page for details
EFFECTIVITY
ABX 001-007, 011, 012, 016-019, 021, 022, 025, 101,
109, 114, 115, 314-999
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