- Holder
- General Electric Company GE Aerospace
- Revision
- 14
- Revised
- July 9, 2024
- Status
- Current
- Product
- Engine
- Certification basis
- Part 33
- Models
- 6
- Registered
- 483 aircraft
The release keeps the latest revision of each data sheet. Model names are as the data sheet lists them.
On this page
Models · 6
| Model | Also known as | Note |
|---|---|---|
| CF34-3A1 | Formerly General Electric Aircraft Engines | |
| CF34-3B | Formerly General Electric Aircraft Engines | |
| CF34-1A | Formerly General Electric Aircraft Engines | |
| CF34-3A | Formerly General Electric Aircraft Engines | |
| CF34-3B1 | Formerly General Electric Aircraft Engines | |
| CF34-3A2 | Formerly General Electric Aircraft Engines |
Airworthiness directives · 30
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.
STCs approved under this data sheet · 1
What the data sheet says
From the PDF’s text layer, line by line: tables lose their columns. The PDF is the record.
U.S. DEPARTMENT OF TRANSPORTATION
FEDERAL AVIATION ADMINISTRATION
TYPE CERTIFICATE DATA SHEET E15NE
TCDS NUMBER E15NE
REVISION: 14
DATE: July 9, 2024
GENERAL ELECTRIC COMPANY
MODELS:
CF34-1A CF34-3A2
CF34-3A CF34-3B
CF34-3A1 CF34-3B1
Engines of models described herein conforming with this data sheet (which is part of Type Certificate Number E15NE) and other
approved data on file with the Federal Aviation Administration, meet the minimum standards for use in certificated aircraft in
accordance with 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: General Electric Company
GE Aerospace
1000 Western Ave
Lynn, Massachusetts 01910
1. MODELS CF34-1A CF34-3A CF34-3A2 CF34-3A1 CF34-3B/-3B1
TYPE Turbofan, single stage fan, fourteen stage axial compressor, annular combustion
chamber, two stage high pressure turbine, four stage low pressure turbine.
RATINGS (See NOTE 5)
Sea level static thrust, lb
Maximum takeoff (5 min.)
(See NOTES 14 and 16) 9140 9220 - - - - - -
Normal takeoff (5 min.)
(See NOTES 14 and 16) 8650 8729 - - - - - -
Maximum continuous
(See NOTE 14) 8920 9140 - - - - - -
FUEL Control, Woodward Governor GE P/N GE P/N GE P/N GE P/N
6047T74 - - 6091T07 6078T55 6078T55
4147T69 4147T70
FUEL (See NOTE 9) Fuel conforming to GE Jet Fuel Specification No. D50TF2, current revision. See SEI-
579 (CF34) Operating Instructions for specific fuels approved per the subject
specifications.
OIL Oil conforming to GE Specification No. D50TF1, current revision. See SEI-579 (CF34),
Operating Instructions for specific oils approved per the subject specifications.
PRINCIPAL DIMENSIONS
Length, inches
Maximum diameter, inches
WEIGHT (dry maximum), pounds
103.19
49.6
1625
- -
- -
- -
- -
- -
- -
- -
- -
1655
- -
- -
1670
*
PAGE 1 2 3 4 5 6
REV. 14 14 8 8 11 14
LEGEND: "- -" INDICATES "SAME AS PRECEDING MODEL"
"---" NOT APPLICABLE
NOTE: SIGNIFICANT CHANGES ARE BLACK-LINED IN THE
LEFT MARGIN.
TCDS E15NE PAGE 2
1. MODELS CF34-1A CF34-3A CF34-3A2 CF34-3A1 CF34-3B/-
3B1
CENTER OF GRAVITY LOCATION,
inches
Forward of combustion chamber
forward flange
Below horizontal centerline
Relative to vertical centerline
6.83
1.00
0.00
- -
- -
- -
- -
- -
- -
7.9
0.7
-1.0
- -
- -
- -
IGNITION SYSTEM CF34-1A Simmonds type 83311 or Bendix type 10-397550-1ignition
exciter with two igniters, Champion type FHE256-10.
CF34-3A Same as CF34-1A through engine 350335; from engine
350336, two igniters Champion type GE P/N 4048T30P10.
CF34-3A2 Simmonds type GE P/N 1538M69, or Unison type GE P/N
9238M66 ignition exciters, with two igniters, Unison type GE
P/N 4096T38P04.
CF34-3A1/ Same as CF34-3A2, except may use alternate igniters,
-3B/-3B1 Unison type GE P/N 4096T38P01.
CERTIFICATION BASIS: 14 CFR Part 33, effective February 1, 1965, as amended by amendments 33-
1through 33-9; amendment 33-10 for 14 CFR Section 33.14; and FAA Grant of
Exemption 3473.
Type Certificate
Model Date of Application No. E15NE Issued
CF34-1A October 24, 1980 August 18, 1982
CF34-3A November 26, 1985 September 26, 1986
CF34-3A1 August 16, 1989 July 24, 1991
CF34-3A2 September 3, 1992 October 9, 1992
CF34-3B/-3B1 July 26, 1993 May 31, 1995
The following models comply with 14 CFR part 34, amendment 7A, effective May
24, 2024. See note 18, for detailed summary of the certification basis for fuel
venting and exhaust emissions: CF34-3A, CF34-3A1, CF34-3A2, CF34-3B, CF34-
3B1.
PRODUCTION BASIS: Production Certificate No. 108
NOTES
Notes 1 through 18 applicable to CF34-1A/-3A/-3A2. Notes 1 through 8, and 11 through 18 applicable to CF34-3A1/-3B/-3B1.
TCDS E15NE PAGE 3
NOTE 1. Maximum permissible engine operating speeds for the engine rotors are as follows:
CF34-1A CF34-3A/-3A2 CF34-3A1 CF34-3B/-3B1
Low pressure rotor (N1), rpm
Maximum takeoff 7,300 - - - - - -
Normal takeoff 7,120 - - - - - -
Maximum continuous 7,300 - - - - - -
High pressure rotor (N2), rpm
Maximum takeoff 17,710 - - - - - -
Normal takeoff 17,510 - - - - - -
Maximum continuous 17,674 - - - - - -
Refer to GE Maintenance Manual SEI-580 and Overhaul Manual SEI-582 for CF34-1A/-3A/-3A2, and GE Engine
Manual SEI-756 for CF34-3A1/-3B/-3B1 for inspection requirements when limits are exceeded. 100 percent N1 rotor
speed is 7,400 rpm. 100 percent N2 rotor speed is 17,820 rpm.
NOTE 2. Maximum permissible temperatures are as follows:
Interturbine temperature (T5)*, oF(oC)
CF34-1A CF34-3A/-3A2 CF34-3A1 CF34-3B/-3B1
Maximum takeoff (5 min.) 1,575(857) 1,600(871) 1,650(899) - -
Maximum takeoff (2 min. 1,627(886) 1,652(900) 1,702(928) - -
transient out of a total
of 5 minutes)
Normal takeoff (5 min.) 1,548(842) 1,573(856) 1,623(884) - -
Normal takeoff (2 min. 1,587(864) 1,613(878) 1,663(906) - -
transient out of a total
of 5 minutes)
Maximum continuous 1,540(838) 1,580(860) 1,630(888) 1650(899)
*The interturbine temperature is measured by 10 thermocouples mounted in the low pressure turbine transition casing.
Additional transient temperature and time limits of less than 1 minute are defined in GE Operating Instructions SEI-579.
Refer to GE Maintenance Manual SEI-580 and Overhaul Manual SEI-582 for CF34-1A/-3A/-3A2, and GE Engine
Manual SEI-756 for CF34-3A1/-3B/-3B1, for inspection requirements when limits are exceeded.
Oil inlet temperature**, oF (oC)
Continuous operation 311(155) - - - - - -
Transient operation 358(163) - - - - - -
**Transient operation above 311oF(155oC) is limited to 15 minutes.
Fuel inlet temperature (at engine fuel filter inlet), oF(oC)
Continuous operation
JP5 158(70) - - 250(121) - -
JP4, JP4/JP5 mixture 158(70) - - 250(121) - -
Ground operation 158(70) - - 250(121) - -
TCDS E15NE PAGE 4
NOTE 3. Fuel and Oil Pressure Limits
Fuel: At engine pump inlet: minimum pressure of 5 PSID above the true vapor pressure of the fuel with a
vapor/liquid ratio of zero with aircraft boost operative. Operating range 5 PISG to 50 PSIG. At engine motive flow
discharge: minimum pressure of 150 PSIG at idle or above. Operating range is 150 PSIG to 700 PSIG.
Oil: CF34-1A/-3A/-3A2: at idle on the ground, 25 PSID minimum to 50 PSID maximum. At takeoff, 40 PSID
minimum to 80 PSID maximum. Operating range, 25 PSID to 80 PSID, allowable to 95 PSID above 16,000 feet.
CF34-3A1/-3B/-3B1: At idle on the ground, 25 PSID minimum to 75 PSID maximum. At takeoff 45 PSID
minimum to 95 PSID maximum. Operating range, 25 PSID to 95 PSID, allowable to 110 PSID above 16,000 feet.
NOTE 4. ACCESSORY DRIVE PROVISIONS
Accessory
Drive
Pad Type
Speed
Ratio to
Core Rotor
Rotation
Facing
Pad
Maximum Torque (in-lb)
Cont. Static
Max.
Cont.
Power
(HP)
Max.
Acc.
Wt.
(lbs.)
O'hung
Momen
t
(in-lb)
Gasket
Starter (4) AS969A-2S(1) .3987 C 6,000 13,000 - - 80 625 None
Hydraulic
Pump
AS969A-3CT(2) .3288 C 750 (6) 3,750 71 50 350 None
Electric
Generator
AS971A-8CS(3) .9815 C 1,050 5,250 165(5) 150 2,500 None
C - clockwise; CC - counterclockwise
1. Pad modified for torque, speed and stud location.
2. Pad modified for torque.
3. Pad modified for speed, power, overhung moment, and stud length and elimination of V-band clamp flange.
4. Pneumatic starter must be fitted with a deflector to prevent impingement of starter discharge air on engine casing.
5. Pad rated at constant horsepower from 9,900 to 17,815 pad RPM with a 5 minute overload rating of 180 horsepower and a
5 second overload rating of 240 horsepower.
6. A short-time overload rating of 1300 in-lb can be applied for six (6) seconds at a time.
NOTE 5. Engine ratings are based on calibrated test stand performance under the following conditions:
Static sea level standard conditions of 59oF and 29.92 inches Hg.
No aircraft accessory loads or air extraction.
No anti-icing; no inlet distortion; no inlet screen losses; and 100% ram recovery.
Inlet bellmouth per Table in Zone D-8 of Installation Drawing 6036T80, Sheet 6, for CF34-1A/-3A/-3A2; Installation
Drawing 6078T61, Sheet 6, for CF34-3A1/-3B/-3B1; contained in GE Installation Manual SEI-567.
Referee short cowl system as described in Part A, Appendix I contained in GE Installation Manual SEI-567.
Specified fuel having an average lower heating value of 18,400 BTU/lb; specified lube oil.
TCDS E15NE PAGE 5
NOTE 6. Air Bleed Extraction - maximum permissible customer air bleed extraction is as follows: Customer bleed air is
available from stages 10 and 14 of the compressor at all operating conditions at or above idle. (No compressor bleed
is permitted below idle.
Location Maximum Bleed Air (% of Total Compressor Airflow
Compressor Stage 10, (for cabin
condition use) 800oF max. 4
Compressor Stage 14, 1000oF max. 6
Minimum required bleed above 40,000 feet is 2 percent; maximum power extraction above 40,000 feet is 32 HP.
NOTE 7. These engines meet FAA requirements for operation in icing provided a minimum core speed (N2) of 11,400 rpm,
corrected to 59oF, is maintained.
NOTE 8. The maximum permissible inlet distortion for these engines is specified in GE Installation Manual SEI-567.
NOTE 9. On CF34-1A/-3A/-3A2, unless the engine is equipped with an optional fuel heater, the following approved fuel
additives must be used individually or in combination: Phillips PFA-55MB or anti-icing additives to specification
MIL-I-27686E at a concentration of 0.10 to 0.15% by volume.
NOTE 10. Reserved.
NOTE 11. Life limits, established for critical rotating components, are published in FAA approved GE Maintenance Manual SEI-
580 for CF34-1A/-3A/-3A2, GE Engine Manual SEI-756 for CF34-3A1/-3B1 and GE Service Manual SEI-780 for
CF34-3A1/-3B.
NOTE 12. Recommend maintenance inspection intervals are published in GE Maintenance Manual SEI-580 for CF34-1A/-3A/-
3A2, GE Engine Manual SEI-756 for CF34-3A1/-3B1 and GE Service Manual SEI-780 for CF34-3A1/-3B.
NOTE 13. The operating temperature limit for specific components and accessories specified in Table A-4 of GE Installation
Manual SEI-567 must be observed when installing the engine.
NOTE 14. The static thrust at sea level are rated at 59oF ambient temperature and below for CF34-1A model and at 70oF
ambient temperature and below for CF34-3A/-3A1/-3A2 models. For the CF34-3B, static thrusts at sea level are rated
at 86oF ambient temperature and below. For CF34-3B1, static thrusts at sea level is rated at 86oF ambient
temperature and below for maximum takeoff and at 73oF and below for normal takeoff and maximum continuous.
The c omputer performance decks for calculating engine performance are as follows:
Engine Model Computer Deck No.
CF34-1A 82070
CF34-3A/-3A1/-3A2 85168A
CF34-3B/-3B1 94111D
NOTE 15. CF34 engines comply with the applicable fuel venting and exhaust emission requirements of SFAR 27-5 and 40 CFR
87.21 except those engines exempted by Grant of Exemption Nos. 4049 and 4049A under provisions of 40 CFR
87.7(b) and Grant of Exemption Nos. 4594 and 4594A under provisions of 40 CFR 87.7(c). The following engine
models manufactured after December 31, 1999 comply with 14 CFR Part 34, effective September 10, 1990, including
Amendments 34-1 through 34-3: CF34-3A1, CF34-3B, CF34-3B1.
TCDS E15NE PAGE 6
NOTE 16. When the automatic reset mechanism in the fuel control is utilized, operation to the normal takeoff rating operating
limits will insure the maximum takeoff rating operating limits are not exceeded when the reset mechanism is actuated.
The time limit at the normal takeoff rating is five minutes and shall include any time accumulated above the normal
takeoff rating.
NOTE 17. The above models incorporate the following general characteristics:
Model Characteristics
CF34-1A Basic Model
CF34-3A Same as -1A except for increased interturbine temperature and rating. The
thrust is flat rated to 70oF ambient temperature sea level static.
CF34-3A1 Same as -3A except for increased interturbine temperature and improved
maintainability and durability features, compatible with airline service
requirements.
CF34-3A2 Same as -3A except for improved combustor, ignition system, and fuel control
3-D cam, same as -3A1, modified fuel distribution system, and revised starting
procedures/
CF34-3B/-3B1 Same as -3A1 except for improved stage 1 compressor and HPT and LPT stator
cooling and clearance control modifications. CF34-3B and -3B1 configurations
are identical except for flat rating points (see NOTE 14).
NOTE 18. The following emissions standards promulgated in 14 CFR part 34, amendment 7A, effective May 24, 2024, and 40 CFR part 1031, effective December 23, 2022, have been complied with for: CF34-3A, CF34-3A1, CF34-3A2,
CF34-3B, CF34-3B1.
Fuel Venting Emission Standards: 14 CFR 34.11; in addition, 40 CFR 1031.30(b)
Smoke Number (SN) Emission Standards: 14 CFR 34.21(e); in addition, 40 CFR 1031.60(a)(5)
Hydrocarbons (HC) Emission Standards: 14 CFR 34.21(d)(1)(i); in addition, 40 CFR 1031.60(c)
Carbon Monoxide (CO) Emission Standards: 14 CFR 34.21(d)(1)(ii); in addition, 40 CFR 1031.60(d)
Oxides of Nitrogen (NOx) Emission Standards: 14 CFR 34.23(b)(1); in addition, 40 CFR 1031.60(e)(5) (also
known as Tier 8 new type)
non-volatile Particulate Matter (nvPM) Mass Concentration Emission Standards: 14 CFR 34.25(a)(1); in
addition, 40 CFR 1031.60(a)(6) (also known as Tier 10)
nvPM Mass and Number Emission Standards: 14 CFR 34.25(a)(2); in addition, 40 CFR 1031.60(b)(2) (also
known as Tier 11 in-production)
In addition to the FAA's finding of compliance based on the certification requirements defined in this TCDS, the
engine manufacturer has declared that the ICAO emissions standards identified in Annex 16, Volume II, Fourth
Edition, Amendment 10, effective July 20, 2020, have also been demonstrated for the following:
• Part II, Chapter 2 for Fuel Venting
• Part III, Chapter 2, Section 2.2.2 for Smoke number,
• Part III, Chapter 2, Section 2.3.2 for Carbon monoxide and Hydrocarbons,
• Part III, Chapter 2, Section 2.3.2.e for Oxides of Nitrogen (also known as CAEP/8),
• Part III, Chapter 4, Section 4.2.2.1 for nvPM Mass Concentration (also known as CAEP/10), and
• Part III, Chapter 4, Section 4.2.2.2 for nvPM Mass and Number (also known as CAEP/11)
END