# TCDS E00009NY: Lycoming Engines

- Type: Type certificate data sheet
- Status: Current
- Holder: Lycoming Engines
- Revision: 5
- Revised: October 22, 2020
- Product: Engine
- Certification basis: Part 23
- Registered aircraft: 44, by the registry models matched to it (OpenAirDocs)
- Data sheet PDF: https://openairdocs.org/files/sha256/ba/92/ba92bb762c94b91fd9ab2f868dec09e36a5d4bd9b83d93b90ce749df7e630de9
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/8DC186C5E3ED577A8625860F0038BFB5.0001
- Page: https://openairdocs.org/tcds/E00009NY

## Models (2)

As the data sheet lists them.

- TEO-540-A1A
- TEO-540-C1A

## What the data sheet says

From the PDF's text layer, line by line; tables lose their columns. The PDF is the record.

```text
Page  No. 1 2 3 
Rev. No. 5 4 2 
DEPARTMENT OF TRANSPORTATION 
FEDERAL AVIATION ADMINISTRATION 
 
TCDS NUMBER E00009NY 
Revision No. 5 
LYCOMING ENGINES 
MODEL :   TEO-540-A1A, C1A 
 
October 22, 2020 
 
TYPE CERTIFICATE DATA SHEET NO. E00009NY 
 
Engines of models described herein conforming with this data sheet (which is a part of Type Certificate No. E00009NY) 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 holder Lycoming Engines, 
 An Operating Division of AVCO Corporation 
 652 Oliver Street 
 Williamsport, Pennsylvania  17701 
 
Model:   TEO-540 -A1A -C1A 
Type 6 HOA Direct Drive Turbocharged, electronically controlled -- 
Rating Maximum continuous hp., rpm at 
standard density critical alt. ft 350-2500 – 8,000 375-2575 – 10,000 
Fuel   
Minimum grade aviation gasoline Lycoming Service Instruction 1070 -- 
Pressure NOTE 2 -- 
Pump NOTE 5 -- 
Pump drive NOTE 3 -- 
Oil, Lubrication   
(Lubricants should conform to the 
specification as listed or to subsequent 
revisions thereto) 
Lycoming Service Instruction 1014 -- 
Temperature NOTE 1 -- 
Pressure NOTE 2 -- 
Sump capacity, qt. 12 -- 
Usable oil qt. 
Engine Position 
9 
NOTE 8 -- 
Ignition, electronic  -- 
ECU (electronic control unit) NOTE 5 -- 
Timing °BTC Variable (electronic) -- 
Spark plugs NOTE 4 -- 
Bore and stroke, in. 5.125 x 4.375 -- 
Displacement, cu. in. 541.5 -- 
Compression Ratio 7.3:1 -- 
Weight (dry) lb. NOTE 5 -- 
C.G. Location NOTE 5 -- 
Crankshaft Counterweights & Rollers One 5th order, One 6th order -- 
Turbocharger TAO411 TH08A60 
Propeller shaft, SAE No. AS-127 Flange, Type 2 Modified -- 
NOTES 1 through 12 1 through 12 
"--" indicates "same as preceding models"  
"─ " indicates "does not apply"

Page 2 of 3 E00009NY 
 
Certification basis: 
  Regulations & Amendments FAR 33 effective February 1, 1965, as amended by 33-1 through 33-34 
  
Model 
 
Date of Application 
Date Type Certificate 
No. E00009NY Issued/Revised 
 TEO-540-A1A December 27, 2008 November 1, 2018 
 TEO-540-C1A February 4, 2016 November 26, 2018 
 
Production basis: Production Certificate No. 3 
 
NOTE 1. Maximum permissible temperatures: 
 
 Cylinder Head   
 (Well Type 
Thermocouple) 
Oil Inlet Exhaust Gas 
TEO-540-A1A 500°F 245°F 1750°F 
TEO-540-C1A 500°F 245°F 1650°F 
 
NOTE 2. Pressure limits: 
 
Fuel: p.s.i.g. at Inlet to Fuel  Pump Fuel Rail Pressure 
 Maximum Minimum     
TEO-540-A1A, -C1A 65 -2  43 psid (above Manifold pressure) 
 
Manifold:     Maximum (in. Hg. Abs.) 
TEO-540-A1A   42.0 
TEO-540-C1A   57.9 
     
Oil: Maximum 
(p.s.i.) 
Minimum 
(p.s.i.) 
  
Normal          95 55   
Idle  25   
Starting and warm-up 115    
 
Turbocharger exhaust back pressure:       Maximum (in. Hg.) 
     0.5 
 
NOTE 3. The following accessory provisions are available: 
Accessory TEO-540-A1A TEO-540-C1A Direction of Rotation Drive Ratio Maximum Torque (in. lb)  Maximum Overhang Moment 
     Continuous Static  (in. lb.) 
Starter• ** ** CC 16.556:1 -- 450 150 
Alternator• ** -- C 3.80:1 60 120 175 
Alternator• -- ** C 3.65:1 60 120 175 
Alternator• -- ** C 3.10:1 60 120 175 
Accessory Drive #1× * * CC 1.30:1 70 800 25 
Accessory Drive #2× * -- C 1.30:1 100 800 40 
Accessory Drive #2× -- * C 1.385:1 100 800 40 
Accessory Drive #3× * -- C 3.54:1 40 300 25 
Fuel Pump * * C 1.0:1 25 450 25 
Propeller 
Governor * * C 0.947:1 125 2200 25 
Freon Comp. Drive -- ** C 1.462:1***         Limited by belt. -- 
 "C" - Clockwise, "CC" - Counter-Clockwise, * Typical,  ** Optional ***With compressor pulley diameter of 6.00 inches 
• These accessories are optional, see latest revision of SI 1154 for the approved alternates.  
× These drives are optional and accessory pads may be cast over.  
Rotation facing drive pad

Page 3 of 3         E00009NY 
 
NOTE 4. Spark plugs approved for use on this engine are listed in the latest revision of Lycoming Service Instruction No. 
1042. 
 
NOTE 5.  The following tabulations show std. dry weight (less alternator, starter, ECU, and power box), C.G.'s, fuel pumps 
and ECUs for this model. 
 
  Center of Gravity   
 
 
 
 
Model 
 
 
 
Weight 
Lb. * 
From 
Front 
Face of 
Prop Shaft 
Flange in. 
 
 
Off Crankshaft 
Center  
Line, in. 
 
 
 
 
Fuel Pump 
 
 
 
 
ECU 
TEO-540-A1A 588.6 21.08 1.69 below 0.05 left HET 200F-5007 ACU-100 
TEO-540-C1A 553.5 22.50 0.25 below 0.00 right HET 200F-5007 ACU-100 
* Less Starter, Alternator, ECU, and Power Box 
 See latest revision of Lycoming SI 1573 for the approved alternates. 
 
NOTE 6.     The listed models incorporate the following additional similarities or differences: 
 
      Model Characteristics 
 
      TEO-540-A1A Basic Model.  Six cylinder, air-cooled, horizontally opposed, direct drive, turbocharged engine 
with electronic fuel injection, electronic ignition, electronic boost control, electronic propeller 
control, down exhaust and incorporates induction air coolers.  The rotating section is similar to 
the TIO-540-J2BD. The induction and turbo supercharging systems are similar to the TIO-540-
AE2A. 
      TEO-540-C1A Similar to -A1A except rating is increased, does not have electronic propeller control, is 
equipped with one TH08A60 turbocharger, and includes density compensation. 
 
NOTE 7.     Starters and alternators approved for use on this engine are listed in the latest revision of Lycoming Service 
Instruction No. 1154. 
 
NOTE 8.     Maximum flight attitudes for the TEO-540-A1A, -C1A are 20° nose up or down. 
 
NOTE 9.     The electronic control system for the TEO-540-A1A, -C1A contains level “B” software according to RTCA 
Document DO-178B which has been shown to meet the requirements for 14 CFR Part 23 single and multi 
engine aircraft regardless of takeoff weight, with the exception of commuter category aircraft. See latest 
revision of Lycoming SI 1573 for approved electronic control units. The ECUs specified in SI 1573 control all 
engine cylinders. 
 
NOTE 10.   The electronic control system for the TEO-540-A1A, -C1A must be supplied with secondary 14 or 28 VDC 
power source via an aircraft essential bus, backed up with the aircraft backup battery. The aircraft backup 
battery must be serviced and/or replaced at the interval specified in the aircraft or battery Maintenance Manual. 
 
NOTE 11.    Installation and evaluation of the ECU cockpit indications is subject to the requirements established by the 
certification basis of the aircraft. 
 
NOTE 12.   Takeoff is prohibited with annunciated NTO (No Take-off) faults shown on the ECU cockpit indications. 
 
......END.....
```

## ADs (3, in force first)

- [AD 2026-04-11](https://openairdocs.org/ad/2026-04-11): Engine (Reciprocating) · Lycoming Engines AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1A and 605 more. Effective Apr 8, 2026
- [AD 2017-16-11](https://openairdocs.org/ad/2017-16-11): Reciprocating Engine Power Section · Lycoming Engines AEIO-320-D1B, AEIO-320-D2B, AEIO-360-B1G6 and 93 more. Effective Aug 15, 2017
- [AD 2024-21-02](https://openairdocs.org/ad/2024-21-02) (historical): Engine (Reciprocating) · Lycoming Engines AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1A and 548 more. Effective Dec 5, 2024

## Registered aircraft by registry model (OpenAirDocs)

- [Lycoming TEO-540-C1A](https://openairdocs.org/engine/lycoming-teo-540-c1a): 44 aircraft (registry code 42715)

## STCs approved under this data sheet (1)

- [STC SE01966WI](https://openairdocs.org/stc/SE01966WI): Use of GAMI G100UL High Octane Unleaded Avgas in spark ignition piston aircraft engines. General Aviation Modifications Inc.

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