- Holder
- Honeywell Aerospace US LLC
- Revision
- 6
- Revised
- March 27, 2026
- Status
- Current
- Product
- Engine
- Certification basis
- Part 33
- Models
- 2
- Registered
- 10 aircraft
The release keeps the latest revision of each data sheet. Model names are as the data sheet lists them.
On this page
Models · 2
| Model | Also known as | Note |
|---|---|---|
| ATF3-6 | Formerly Garrett, then AlliedSignal, Inc. | |
| ATF3-6A | Formerly Garrett, then AlliedSignal, Inc. |
Airworthiness directives · 4
ADs whose products are models on this data sheet, matched by model and maker.
Registered aircraft
Registry models that point at this data sheet, with their registered aircraft.
What the data sheet says
From the PDF’s text layer, line by line: tables lose their columns. The PDF is the record.
DEPARTMENT OF TRANSPORTATION
FEDERAL AVIATION ADMINISTRATION
E7WE
Revision 6
Honeywell Aerospace US LLC
(AlliedSignal, Garrett)
ATF3-6
ATF3-6A
March 27, 2026
TYPE CERTIFICATE DATA SHEET NO. E7WE
Engine models described herein conforming with this data sheet (which is part of Type Certificate No. E7WE) and
other approved data on file with the Federal Aviation Administration, meet pertinent aircraft data sheets and
applicable portions of the Federal Aviation Regulations provided they are installed, operated, and maintained as
prescribed by the approved manufacturer's manuals and other approved instructions.
TYPE CERTIFICATE (TC) HOLDER: Honeywell Aerospace US LLC
111 South 34th Street
Phoenix, AZ 85034
TYPE CERTIFICATE HOLDER RECORD: Honeywell International Inc.
111 South 34th Street
Phoenix, AZ 85034
TYPE CERTIFICATE HOLDER RECORD: AlliedSignal Inc.
111 South 34th Street
Phoenix, AZ 85034
TYPE CERTIFICATE HOLDER RECORD: Garrett Turbine Engine Co.
111 South 34th Street
Phoenix, AZ 85034
Model Number: ATF3-6, ATF3-6A
Type Turbofan, three-rotor, single-stage fan, 5-stage axial low-pressure
compressor, single-stage centrifugal high-pressure compressor, reverse-
flow annular combustor, single-/3-/2- stage high-/low pressure
turbine, mixed-flow exhaust, electronic hydromechanical fuel control
Page No. 1 2 3 4 5 6 7
Revision No. 6 6 6 6 2 6 2
E7WE 2 of 7
Rating (see Note 5)
ATF3-6 ATF3-6A
Maximum continuous at sea level and
59°F
Static thrust, lbs.
5101 5101
Takeoff at sea level and 59°F (5
minutes):
Static thrust, lbs.
5440 5440
Flight idle at sea level (minimum)
Static thrust, lbs.
740 740
Controls and Accessories Certain engine controls and accessories are approved for use on the engine. These
(see Note 13) controls and accessories are listed in the FAA approved Honeywell Aerospace
Service Bulletin ATF3-72-6003.
Center of Gravity Refer to Installation Manual, IM-2800, Section 3, for center of gravity with
standard equipment as well as optional accessories.
Principle Dimensions: length (including spinner) 102.8 inches (-6)
101.97 inches (-6A)
width 33.7 inches
The undrainable fuel and oil weight shall not exceed 13.4 pounds.
This includes 18.25 pounds for the remotely mounted electronic fuel control.
The engine weight shown herein is that of the power section and all components
coded "E" in the Engine Parts List. The total engine weight, including the weight
of items coded "A" in the Engine Parts List, is included on the engine installation
drawing for each specific aircraft configuration.
Fuel Fuels conforming to the following Honeywell Aerospace
Specifications: EMS 53111 (Jet A type)
EMS 53112 (Jet A-1 and JP-8 type)
EMS 53113 (Jet B and JP-4 types)
EMS 53116 (JP-5 type)
Fuel Additives
SOHIO Biobar JF biocide additive is approved for use in the fuel at a
concentration not to exceed 20 ppm of elemental boron.
Model Number ATF3-6 ATF3-6A-3 ATF3-6A-4
Total dry weight 1165.2 1186.4 1165.3
Total wet weight 1194.6 1215.8 1194.7
E7WE 3 of 7
Shell ASA-3 anti-static additive, in amounts to bring fuel up to 300
conductivity units is permissible except that in no event shall the additive
exceed 1ppm.
MIL-DTL-85470 "D" or "E" inhibitor, icing, fuel system is approved for
use in the fuel in amounts up to 0.15 percent by volume.
Oil Oil must conform to Honeywell Aerospace Specification EMS 53110,
Type II (MIL-PRF-23699). The ATF3-6 engine has a self-contained oil
system and does not require an aircraft installed oil tank.
Certification Basis: 14 CFR Part 33, dated April 3, 1967, and amendments 33-1 through 33-
8, and Exemption Number 2566, dated June 8, 1978, which provided an
exemption to §§33.27 and 33.88. Dated of application for type certificate
was October 28, 1974. Type Certificate Number E7WE issued dated
May 15, 1981, for the ATF3-6 and March 8, 1982, for the ATF3-6A.
Production basis: Production Certificate Number 413NM, issued to Honeywell Aerospace
US LLC on March 29, 2026.
NOTE 1: Maximum permissible engine rotor speeds are:
Maximum permissible three-hour engine windmilling speeds (rpm) are:
ATF3-6 ATF3-6A
Fan rotor (N1) (-6) 2835 (27.3%) (26.5%)
Low pressure rotor (N2) 1516 (8.8%) (8.8%)
High pressure rotor (N3) 4768 (12.9%) (12.9%)
NOTE 2: Maximum permissible temperatures:
Continuous RPM
(percent)
30-Second
Transient RPM
(percent)
5- Second
Transient
RPM (percent)
Fan Rotor (N₁) (-6A) 10,700 (100.0) 10,700 (100.0) 10,700 (100.0)
Fan Rotor (N₁) (-6) 10,400 (100.0) 10,400 (100.0) 10,400 (100.0)
Lower pressure rotor (N2) 17, 200 (100.0) 17,286 (100.5) 17,544 (102.0)
High pressure rotor (N3) 36,900 (100.0) 37,269 (101.0) 38,008 (103.0)
Interstage Turbine Temperature (ITT):
Takeoff (5 minute)
1850°F
(1010°C)
Takeoff (5 second transient)
Maximum continuous Starting
Starting (5 second transient)
1868°F
1778°F
1850°F
1868°F
(1020°C)
(970°C)
(1010°C)
(1020°C)
E7WE 4 of 7
NOTE 2: (continued)
Engine external components, maximum temperature (limiting temperature of
specific components are as specified in the Engine Installation Manual IM-2800,
Section 12.)
NOTE 3: Pressure Limits (psig):
Oil Pressure
Takeoff, climb, flight idle and cruise 55 to 83
Ground idle 30 to 83
Transient (3 minutes maximum) 90 (maximum)
(Refer to IM-2800)
Fuel Pressure
Maximum 50
Minimum 5 psi above true vapor
pressure
Note: An 8-mesh or finer screen must be provided upstream of the engine fuel
inlet.
NOTE 4: Maximum fuel vapor/liquid ration is 0.45. (Refer to IM-2800).
NOTE 5: Engine ratings are based on calibrated test stand performance under the following
conditions:
a) No load on accessory drives.
b) No compressor or fan bleed airflow.
c) Bellmouth inlet conforming to Honeywell Aerospace Drawing SKP22514,
included in the drawing section, with inlet ram recovery of 100 percent.
d) Fan duct and exhaust nozzle conforming to Honeywell Aerospace Drawing
3001120, included in the drawing section. Nominal physical exhaust
nozzle throat area is 405 square inches.
e) No anti-icing airflow.
f) 0.2 percent cooling air extracted from the fan discharge bypass flow to
maintain specified component temperatures in Zone II (tailcone). (Refer
to IM-2800.)
g) Interstage Turbine Gas Temperature (ITT) and rotor speed limits
not exceeded.
h) Test stand data corrected to reflect any deviation from U.S. Standard
Atmosphere of 59°F and 29.92 in.Hg. sea level, static conditions.
i) At sea level static conditions below 46°F the ATF3-6 engine has a flat rated
Oil temperature °F (°C)
Takeoff (maximum) 360 (182)
Takeoff (minimum) 122 (50)
Continuous operation (maximum) 360 (182)
Continuous operation (minimum) 122 (50)
Starting (minimum) -40 (-40)
Transient (3 minutes) 370 (188)
Engine fuel inlet temperature °F (°C)
Maximum (refer to IM-2800) 135 (57)
Minimum (refer to IM-2800) 65 (-54)
E7WE 5 of 7
maximum continuous thrust of 5440 lbs. and above 46°F is rated at a constant ITT
of 1778°F.
j) At sea level static conditions below 71°F the ATF3-6 engine has a flat
rated takeoff thrust of 5440 lbs. and above 71°F is rated at a constant ITT
of 1850°F.
k) At sea level static conditions below 46°F the ATF3-6A engine has a flat
rated maximum continuous thrust of 5440 lbs. and above 46°F is rated
at a constant ITT of 1778°F.
l) At sea level static conditions below 70°F the ATF3-6A engine has a flat
rated takeoff thrust of 5440 lbs. and above 70°F is rated at a constant ITT of
1850°F.
NOTE: Refer to Installation Manual, IM-2800, Section 14, for
uninstalled takeoff, and maximum continuous, and maximum
climb power setting curves.
NOTE 6: Maximum engine oil consumption rate is 0.07 gallon per hour measured over a
10-hour period.
N
OTE 7:
A
ccessory
Drive
AS Standard Drive
Type (1 each)
AS
Mating
Flanage
Rotation
Direction
(facing drive
pad) Drive to
Rotor Ratio
with N3 at
36,900
Maximum Torque (lb.-
in.)
Accessory
Weight
Pounds
Maximum
Tc To Ts
Aircraft
Accessory - D1
468-A6C-1, Rev B
(modified)
471 CW
0.340
355 500 1690 60
Starter
Generator - D2
468-A6C-1, Rev B
(modified)
471 CW
0.207
500 750 2530 65
Hydraulic
Pump - D3
961, Rev. A
(modified)
962-1P CCW
0.214
250 375 1650 12
Hydraulic
Pump - D4
961, Rev. A
(modified)
962-1P CCW
0.166
320 480 1622 40
CW =
Clockwise
CCW =Counterclockwise
Tc = Continuous Torque
To =Torque Overhead
Ts = Static Torque
R
efer to IM-2800, Section 9, Figure 9-1 for total accessory shaft
horsepower available for extraction from accessory drives.
P
ads D3 and D4 are modified for 0.343-inch groove depth and 0.264-
inch minimum groove width.
E7WE 6 of 7
A speed-reducing gearbox suitable for mounting on the Permanent
Magnet Generator (PMG) is available as an option. With this gearbox
installed on Pad D1, the accessory drive pad is identified as D4.
The estimated torsional spring constant for the starter-generator drive is
126,000 lb.-in per radian.
Maximum windmilling accessory power extraction and aerodynamic
drag are provided n Section 9 of IM-2800.
NOTE 8: A total bleed airflow equal to a maximum of 8.5 percent of the engine core airflow
may be extracted from the four bleed ports, provided not more than 5 percent of
the gas generator airflow is extracted from the high-pressure bleed ports.
NOTE 9: These engines meet FAA requirements for operation in icing conditions within the
envelope defined in 14 CFR Part 25, Appendix C, in effect on the date on which
the original engine type certificate was issued.
NOTE 10: Certain engine parts are life limited. These limits are listed in the FAA-
approved Honeywell Aerospace Service Bulletin ATF3-72-6001.
NOTE 11: Power setting, power checks and control of engine thrust output in all
operations is based on Honeywell Aerospace engine charts which refer to
fan rotor speed (N1) and are contained in Section 14 of the Installation
Manual, IM-2800. Speed sensors are included in the engine assembly for
this purpose.
NOTE 12: These engines are certified for use with electronic/hydromechanical fuel
control. The electronic computer is essential for takeoff operations and
must be installed in accordance with instructions provided in Section 12
of IM-2800.
NOTE 13. Variations in engine configuration, installation components, and derated thrust are
identified by a suffix in the basic model number on the engine nameplate;, i.e.,
ATF3-6-XY, (“X” denotes Honeywell Aerospace installed configurations rating
code number(s) and “Y” denotes Honeywell Aerospace equipment code letter(s)
of aircraft manufacturer), Engine Parts List number. These variations are
influenced by aircraft design n considerations. In the Engine Parts List, those items
coded "E" are basic engine items and are controlled by 14 CFR Part 33. Items
coded "A" have been demonstrated as compatible with the basic engine during
engine certification testing. However, the operation, functioning and performance
of these in a specific aircraft installation must be demonstrated during aircraft
certification. Subsequent design associated with these factors is the responsibility
of the aircraft manufacturer.
NOTE 14: Maximum allowable steady-state engine air inlet distortion limits for stall-free
operation are provided in Section 8 of IM-2800.
NOTE 15: Time for first overhaul: These engines are of modular construction, as described in
IM-2800. Inspection intervals for each of these modules is provided in FAA-
approved Honeywell Aerospace Service Bulletin ATF3-72-6002.
E7WE 7 of 7
NOTE 16: These engines are in compliance with the fuel venting emission requirements of
Special Federal Aviation Regulations No. 27, Section 15(a)(3).
NOTE 17: For additional authorized operation and installation detailed information, see
FAA-approved sections of the Engine Installation Manual, IM-2800.
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