- Holder
- Lycoming Engines
- Revision
- 8
- Revised
- November 4, 2010
- Status
- Current
- Product
- Engine
- Models
- 11
- Registered
- 7 aircraft
The release keeps the latest revision of each data sheet. Model names are as the data sheet lists them.
On this page
Models · 11
| Model | Also known as | Note |
|---|---|---|
| TVO-435-D1B | Formerly Textron Lycoming, AVCO Corporation | |
| TVO-435-A1A | Formerly Textron Lycoming, AVCO Corporation | |
| TVO-435-E1A | Formerly Textron Lycoming, AVCO Corporation | |
| O-435-25 | Formerly Textron Lycoming, AVCO Corporation | |
| TVO-435-C1A | Formerly Textron Lycoming, AVCO Corporation | |
| TVO-435-B1B | Formerly Textron Lycoming, AVCO Corporation | |
| TVO-435-B1A (O-435-25A) | Formerly Textron Lycoming, then AVCO Corporation · (O-453-25A) | |
| TVO-435-G1B | Formerly Textron Lycoming, AVCO Corporation | |
| TVO-435-D1A | Formerly Textron Lycoming, AVCO Corporation | |
| TVO-435-F1A | Formerly Textron Lycoming, AVCO Corporation | |
| TVO-435-G1A | Formerly Textron Lycoming, AVCO Corporation |
Airworthiness directives · 13
ADs whose products are models on this data sheet, matched by model and maker.
AD 2026-04-11Engine (Reciprocating)AD 2022-16-03Engine (RECIPROCATING)AD 2012-03-07CarburetorAD 2010-07-08TurbochargersAD 2004-10-14Crankshaft gearAD 95-26-02Aviation GasolineAD 90-04-06 R1Propeller Governor External Oil LineAD 89-04-02CarburetorsAD 80-04-04 R1Crankshaft Flange BoltsAD 69-24-03CarburetorsAD 66-06-03Connecting Rod AssembliesAD 68-08-08Hydraulic ValveAD 2024-21-02HistoricalEngine (Reciprocating)
Registered aircraft
Registry models that point at this data sheet, with their registered aircraft.
Lycoming TVO-435-B1A2 registered aircraftLycoming TVO-435-D1A2 registered aircraftLycoming TVO-435-A1A1 registered aircraftLycoming TVO-435-F1A1 registered aircraftLycoming TVO-435-G1A1 registered aircraftLycoming 0-435-250 registered aircraftLycoming TVO-435-B1B0 registered aircraftLycoming TVO-435-C1A0 registered aircraftLycoming TVO-435-D1B0 registered aircraftLycoming TVO-435-E1A0 registered aircraftLycoming TVO-435-G1B0 registered aircraft
STCs approved under this data sheet · 14
STC SE2932SWInstall carburetor air temperature indicator. Approved for Aircooled Motors (Franklin Engine Co.) equipped with float carburetors. Model eligibility included here may not be inclusive.STC SE01954SEInstallation of engine crankcase seal.STC SE01966WIUse of GAMI G100UL High Octane Unleaded Avgas in spark ignition piston aircraft enginesSTC SE8628SWInstallation of oil nozzles for lubrication of cam and filters.STC SE8776SWInstallation of coated cylinders and piston rings.STC SE09492SCInstallation and usage of Exxon 20W50 multigrade aircraft engine oil conforming to Exxon Oil formulation WS-3013.STC SE00350SEInstallation of sump mounted chip detector.STC SE8023SWInstallation and usage of AEROSHELLSTC SE452NEInstallation and usage of 'Mobil AV 1' aviation oil.STC SE5879SWUse of Phillips X/C II 20W-50 and25W-60 oil (OSS 55875) in all Avco reciprocating aircraft engines from 65 to 450 BHP.STC SE5924SWInstallation of stainless steel replacement exhaust studs on AVCO engines.STC SE80NEInstallation and usage of Bel-Ray synthetic aviation oil, Bel-Ray Aero 1, (nonsupercharged), horizontally opposed direct drive, aircraft engines of 350 hp. or less.STC SE128NEUse of AMS/OIL 15W 50 synthetic piston aircraft oil in Avco engines.STC SE44WEUse of Kling Aviation Oil, Specifications KL-100, KL-200 and KL-300 in Continental and Lycoming engines.
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
1E13
Revision 8
Lycoming Engines
TVO-435-A1A
O-435-25
TVO-435-B1A (O-435-25A),
-B1B, -C1A
TVO-435-D1A, -D1B, -E1A,
-F1A, -G1A, -G1B
November 04, 2010
TYPE CERTIFICATE DATA SHEET NO. 1E13
Engines of models described herein conforming with this data sheet (which is a part of type certificate No. 1E13) 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 Civil Air Regulations/Federal Aviation Regulations provided they are
installed, operated and maintained as prescribed by the approved manufacturer's manuals and other approved instructions.
Type Certificate Holder Lycoming Engines
An Operating Division of AVCO Corporation
Williamsport, Pennsylvania 17701
Type Certificate Holder Record Avco Lycoming Division, Avco Corp. transferred TC 1E13 to Lycoming Engines, An Operating
Division of AVCO Corporation on November 04, 2010
Model: Lycoming TVO-435-A1A TVO-435-B1A(-25A), -B1B TVO-435-C1A TVO-435-D1A, -D1B
Type: 6HOA Vertical Mounted Direct
Drive Turbosupercharged
Rating (See NOTE 5)
Max. continuous, hp., r.p.m., in. Hg., at:
Rated pressure altitude ft. 220-3200-30. 0-20,000 220-3200-30. 3-20,000 250-3200- 34.8-20,000 220- 3200-27.8-20,000
Sea level pressure altitude ft. 220-3200-27.2- S.L. 220-3200-27.5-S. L. 250-3200-30.0-S.L. 220-3200-26. 4-S.L.
Takeoff (5 min.), hp., r.p.m., in. Hg., at:
Rated pressure altitude ft. 260-3200-33. 2-15,000 270-3200-35. 1-14,000 280-3200- 37.0.16,000 270- 3200-35.0-18,000
Sea level pressure altitude ft. 260-3200-31.7- S.L. 270-3200-32.8-S. L. 380-3200-34.0-S.L. 270-3200-32. 0-S.L.
Fuel (minimum grade aviation gasoline) 100/130 - - - - - -
Lubricating oil (lubricants should Latest Edition of Lycoming
conform to the specifications as listed Service Instruction No. 1014 - - - - - -
or to subsequent revisions thereto.)
Bore and stroke, in. 4.875 x 3.875 - - - - - -
Displacement, cu. in. 434.0 - - - - - -
Compression ratio 7.3:1 - - - - - -
Weight (dry), lb. See NOTE 8 - - - - - -
C.G. Location (dry and in horizontal
position)
From front face of crankcase, in. 15.30 15.92 - - 15.30
Off crankshaft C.L., in. 1.13 below 2.00 below - - 1.55 below
0.10 right 0.75 left - - 0.45 left
Propeller shaft Flange type power takeoff - - - - - -
Crankshaft dampers & balancers None - - - - - -
Carburetion# Marvel-Schebler + MA-6AA - - - - - -
Turbosupercharger – Kelly Aerospace*
models (NOTE 5) T-1108 - - T-1112 TE-0659
Ignition, dual See NOTE 8 - - - - - -
Timing BTC 25 - - - - - -
Spark plugs See NOTE 9 - - - - - -
Oil sump capacity Dry sump - - - - --
NOTES 1 thru 10 - - - - - -
Model: Lycoming O-435-25 TVO-435-F1A TVO-435-E1A TVO-435-G1A, -G1B
Type: 6HOA Vertical Mounted Direct
Drive Turbosupercharged
Rating (See NOTE 5)
Max. continuous, hp., r.p.m., in, Hg., at:
Rated pressure altitude ft. 220-3200-30. 0-20,000 250-3200-32. 0-20,000 220-3200- 27.8-20,000 220- 3200-27.9-20,000
Sea level pressure altitude ft. 220-3200-27.2- S.L. 250-3200-29.7-S. L. 220-3200-26.4-S.L. 220-3200-26. 5-S.L.
Takeoff (5 min.), hp., r.p.m., in. Hg., at:
Rated pressure altitude ft. 260-3200-33. 2-15,000 280-3200-37. 0-18,000 260-3200- 32.7-26,000 280- 3200-37.0-18,000
Sea level pressure altitude ft. 260-3200-31.7- S.L. 280-3200-33.3-S. L. 260-3200-30.8-S.L. 280-3200-33. 3-S.L.
Fuel (minimum grade aviation gasoline) 100/130 - - - - - -
Lubricating oil (lubricants should MIL-L-6082
conform to the specifications as listed Latest Edition of Lycoming - - - - - -
or to subsequent revision thereto.) Service Instruction No. 1014
Bore and stroke, in. 4.875 x 3.875 - - - - - -
Displacement, cu. in. 434.0 - - - - - -
Compression ratio 7.3:1 - - - - - -
Weight (dry), lb. See NOTE 8 - - - - - -
C.G. Location (dry and in horizontal
position)
From front face of crankcase, in. 15.92 15.94 15.50 - -
Off crankshaft C.L., in. 2.00 below 1.75 below 1.55 below - -
0.75 left 0.69 left 0.45 left - -
Propeller shaft Flange type power takeoff - - - - - -
Crankshaft dampers & balancers None - - - - - -
Carburetion# Marvel-Schebler + MA-6-AA - - - - - -
Turbocharger – Kelly Aerospace*
models (NOTE 5) T-1108 TK-0659 - - - -
Ignition, dual See NOTE 8 - - - - - -
Timing BTC 25 - - - - - -
Spark plugs See NOTE 9 - - - - - -
Oil sump capacity, qt. Dry sump 10 Dry sump - -
Usable oil (nose 15 up or down) 6
NOTES 1 thru 11 1,2,3,4,5,6,7,8,9,10,12 1 thru 10 - -
"- -" indicates "same as preceding model"
"" indicates "does not apply"
# See latest edition of Lycoming SI 1523 for alternate approved Carburetors
+ Marvel-Schebler formerly Volare, Precision Airmotive Corporation, Facet Aerospace Products Company, and Borg Warner Corporation
* Kelly Aerospace, formerly AiResearch
Certification basis:
Date Type Certificate
Regulations and Amendments Model Date of Application 1E13 Issued/Revised
CAR 13 As Amended to June 15, 1956 TVO-435-A1A January 5, 1961 May 12, 1961
13-1, 13-2, 13-3 TVO-435-B1A July 24, 1962 November 21, 1962
13-4 TVO-435-C1A October 24, 1962 November 21, 1962
O-435-25 May 29, 1963 June 10, 1963
FAR 33, 33-1 Effective February 1, 1965 TVO 435-D1A March 4, 1966 March 10, 1966
O-435-25A March 4, 1966 March 10, 1966
TVO-435-B1B June 20, 1966 June 20, 1966
33-2 TVO-435-D1B January 17, 1967 February 23, 1967
TVO-435-E1A January 17, 1967 March 7, 1967
33-3 TVO-435-F1A May 17, 1967 January 22, 1968
O-435-G1A December 28, 1967 January 11, 1968
O-435-G1B November 15, 1968 November 25, 1968
Production basis: Production Certificate No. 3.
NOTE 1. Maximum permissible temperatures:
E x h a u s t G a s
Cylinder Head Cylinder Oil (Turbo Inlet at Location Shown Carburetor
(Well Type Thermocouple) Base * Inlet on Lycoming Dwg. No. 63147) ** Inlet Air
500 F 300 F 235 F 1650 F 325 F (A1A), (D1A)
3 2 5 F (O-435-25) 330 F (B1A), (B1B)
3 2 0 F (C1A)
3 2 5 F (O-435-25), (D1B)
(E1A), (F1A), (G1A), (G1B)
* This parameter dispensed with where pistons internally cooled by oil jets. (See NOTE 10)
** Drawing No. 63251 for -D1A, -D1B, -E1A, -G1A & -G1B; Drawing No. 63282 for -F1A.
NOTE 2. Pressure range and temperature rise.
M a x i m u m M i n i m u m Idle
Fuel Pressure Limits: (above carburetor
entrance air pressure)
(at inlet to carburetor) 8 p.s.i. 4 p.s.i.
Oil pressure limits: 70 p.s.i.. (O-435-25 75 10) 50 p.s.i. 25 p.s.i.
(Model -F1A) 85 p.s.i. 65 p.s.i. 25 p.s.i.
Carb. Inlet Air Pressure Manifold Pressure Compressor Temperature
Model (Max.) in. Hg. (Max.) in. Hg. Rise (Max.) F
TVO-435-A1A 38 34.5 240
-B1A, -B1B 39 37 240
-C1A 41 39 230
-D1A, -D1B 39 37 220
-E1A 38 34 240
-F1A, -G1A, -G1B 39 37 220
O-435-25 38 34.5 240
NOTE 3. The following accessory provisions are available:
Accessory
All Except
-F1A
-F1A
Rotation
Facing Drive
Pad
Speed Ratio to
Crankshaft
Maximum Torque
(in. -lb.)
Cont. Static
Maximum
Overhang
Moment
(in. -lb.)
Starter * c 1.000:1 12,000 300
Alternator * cc 2.250:1 60 400 175
Generator *** * c 2.600:1 500 2,200 400
Fuel Pump * cc .803:1 25 450 25
Vacuum Pump * c 1.219:1 200 800 25
Vacuum Pump * c 1.105:1 200 800 25
Hydraulic Pump ** c 1.083:1 400 1,650 175
Tachometer * cc .500:1 7 50
Tachometer * cc .500:1 7 50 5
Dual drives mounting on hydraulic pump pad:
Hydraulic Pump * c 1.105:1 400 1,650 175
Fuel Pump * c .789:1 25 450 25
* Standard
** Supplied as optional equipment.
*** Not available as generator drive when fitted with hand crank starter jaw.
NOTE 4. This engine is approved for helicopter appli cation and operation in a vertical mount installation.
NOTE 5. These engine models are equipped with Kelly Aerospace (formerly AiResearch) turbosupercharger Models T-1106, T-1112 or
TE-0659, as indicated on pages 1 and 2 of this data sheet. An integral automatic power control makes standard day, sea level ratings
available at other than standard conditions up to critical altitudes. Performance data for these engines are presented on Lycoming Curve
Nos. 12814 (A1A), 12886 (B1A (-25A), and (B1B), 12888 (C1A), 13023 (D1A and D1B), 13057 (E1A), 13076 (F1A), 13092 (G1A and
G1B), and 12814 (O-435-25).
NOTE 6. The turbocharger control is servo-operated from either e ngine oil or an external supply of MIL-H-5606 hydraulic fluid at a
pressure of 60 - 70 p.s.i. This control is not equipped to use "Skydrol" fluid.
NOTE 7. The turbocharger meets the containment requirements of CAR 13.116 and does not require external protection.
NOTE 8. Ignition and Weights:
Models Ignition, dual # Weight (dry) lb.
TVO-435-A1A TCM S6RN-200 & S6LN-204 468
-B1A, (-25A) TCM S6RN-200 & S6LN-204 478
-B1B TCM S6RN-1208 & S6LN-1209 479
-C1A TCM S6RN-200 & S6LN-204 478
-D1A TCM S6RN-1208 & S6LN-1209 465
-D1B TCM S6RN-200 & S6LN-204 464
-E1A TCM S6RN-200 & S6LN-204 462
-F1A TCM S6LN-1208 & S6RN-1209 490
-G1A TCM S6RN-1208 & S6LN-1209 465
-G1B TCM S6RN-200 & S6LN-204 464
O-435-25 TCM S6RN-200 & S6LN-204 493
# TCM formerly Bendix.
NOTE 9. Spark plugs: See latest revision of Lycomi ng Service Instruction No. 1042 for approved equipment.
NOTE 10. These engines incorporate the following similarities or differences:
Model Characteristics
TVO-435-A1A Six cylinder, air cooled, horizontally opposed, ve rtical mounted, direct drive turbosupercharged engine
with internal piston cooling oil jets.
TVO-435-B1A Similar to -A1A except that cylinder assemblies are machined for long reach spark plugs.
TVO-435-B1B Same as -B1A except has TCM (form erly Bendix) S6RN-1208 and S6LN-1209 magnetos.
TVO-435-C1A Similar to -B1A except incorporates T-1112 turbosupercharger.
O-435-25 Military model similar to -A1A except has cylinder assemblies similar to -B1A.
TVO-435-D1A Similar to TVO-435-B1A except incorporates TK-0659 turbosupercharger and TCM (formerly Bendix)
S6RN-1208 (retard breaker) and S6LN-1209 magnetos.
TVO-435-D1B Same as -D1A except for incorporati on of TCM (formerly Bendix) S-200 series magnetos.
TVO-435-E1A Same as -A1A except for incorporation of Kelly Aerospace (formerly AiResearch) TK-0659
turbosupercharger.
TVO-435-F1A Similar to -D1A except is wet sump, ha s different accessory section and higher power rating.
TVO-435-G1A Similar to -D1A except has different automa tic waste gate control setting for higher power rating.
TVO-435-G1B Same as -G1A ex cept has different magnetos.
NOTE 11. Military Models O-435-25 and O-435-25A are simila r and identical to TVO-435 Models -A1A and -B1A,
respectively. When installed in certificated aircraft , the corresponding civil model designation and type certificate
number should be added to the engine data plate.
NOTE 12. Starters, generators and alternat ors approved for use on these engines are listed in the latest revision of Lycoming
Service Instruction No. 1154 (-F1A only).
. . . END . . .