# TCDS 1E12: Lycoming Engines

- Type: Type certificate data sheet
- Status: Current
- Holder: Lycoming Engines
- Revision: 10
- Revised: April 4, 2018
- Product: Engine
- Certification basis: CAR 13
- Registered aircraft: 1,967, by the registry models matched to it (OpenAirDocs)
- Data sheet PDF: https://openairdocs.org/files/sha256/01/73/0173fdcf631efb528e0b4efcfd288e356f71be4781dbb83fbbaf12574baadd87
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/EB163DE97780A96B8625827F005B08C4.0001
- Page: https://openairdocs.org/tcds/1E12

## Models (32)

As the data sheet lists them.

- AEIO-320-E1B
- AEIO-320-D2B
- AIO-320-C1B
- AIO-320-A1A
- IO-320-B1C
- IO-320-C1B
- IO-320-F1A
- LIO-320-B1A
- IO-320-B1D
- AIO-320-A2B
- AEIO-320-E2A
- AEIO-320-E1A
- IO-320-E1B
- IO-320-D1C
- IO-320-B2A
- AIO-320-A1B
- AEIO-320-D1B
- AEIO-320-E2B
- IO-320-E2B
- IO-320-E1A
- LIO-320-C1A
- IO-320-C1A
- IO-320-B1B
- IO-320-D1B
- IO-320-D1A
- IO-320-B1A
- IO-320-A1A
- AIO-320-B1B
- IO-320-E2A
- AIO-320-A2A
- IO-320-B1E
- IO-320-A2A

## 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 4 5 6 7 
Rev. No. 10 10 8 8 8 8 8 
 
DEPARTMENT OF TRANSPORTATION 
FEDERAL AVIATION ADMINISTRATION 
 
1E12 
Revision 10 
Lycoming Engines 
IO-320 -A1A-A2A-B1A, -B1B, B1C, -B1E, -B1D, -B2A,  
 -C1A, -C1B, -D1A, -D1C, -D1B, -E1A, -E1B, 
 -E2A, -E2B, -F1A 
LIO-320-B1A, -C1A 
AIO-320-A1A, -A1B, -A2A, -A2B, -B1B, -C1B 
AEIO-320-D1B, -D2B, -E1A, -E1B, -E2A, -E2B 
April 4, 2018 
 
TYPE CERTIFICATE DATA SHEET NO. 1E12 
 
Engines of models described herein conforming with this data sheet (which is a part of type certificate No. 1E12) 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 Regulati ons 
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 Textron, Williamsport Division transferred TC 1E12 to Lycoming 
Engines, An Operating Division of AVCO Corporation on December 17, 2003 
 
Model                         Lycoming IO-320-A1A IO-320-B1A,-B1B IO-320-C1A AEIO-320-E1A 
Type 4HOA Direct Drive -A2A,-E1A -B1C,-B1D, -B2A -C1B, -F1A -E1B,-E2A 
 -E2A,-E1B -B1E, -D1A, -D1B LIO-320-  -E2B 
 -E2B -D1C C1A,  
  LIO-320-B1A   
Rating     
 Maximum continuous, hp.,r.p.m.     
 full throttle at:     
 Sea level pressure altitude 150-2700-S.L. 160-2700-S.L. - - 150-2700-S.L. 
Takeoff, hp., r.p.m., full throttle at     
 Sea level pressure altitude 150-2700-S.L. 160-2700-S.L. - - 150-2700-S.L. 
Fuel (min grade aviation gasoline) Latest revision of Lycoming 
Service Instruction No. 1070 
- - - - - - 
Lubricating oil (Lubricants should 
conform to the specification as listed or 
subsequent revisions) 
Latest revisions of Lycoming 
Spec.No. 301 and Service 
Instruction 1014 
- - - - - - 
Bore and Stroke, in. 5.125 x 3.875 - - - - - - 
Displacement, cu.in. 320 - - - - - - 
Compression ratio 7.00:1 8.50:1 - - 7.00:1 
Weight, lb. See NOTE 9 - - - - - - 
C. G. location See NOTE 9 - - - - - - 
Propeller shaft flangs, SAE No. AS 127 Type 2 modified - - - - - - 
Crankshaft dampers and balancers None - - - - - - 
Fuel Injector Bendix RSA -5AD1 - - - - - - 
Ignition, dual See NOTE 9 - - - - - - 
Timing, °BTC 25 - - - - - - 
Spark plugs See NOTE 4 - - - - - - 
Oil sump capacity, qt. 8 - - - - - - 
Minimum usable oil,qt. (30° nose up or 
down) 
2 - - - - — 
Minimum usable oil,qt. (30° nose up, 20° 
nose down) 
— — — 4 
NOTES 1,2,3,4,5,6,7,8,9 - - - - - - 
“- -” same as preceding:  “—”does not apply.

1E12 Page 2 of 8 
 
Model                         Lycoming AIO-320-A1A AEIO-320-D1B,  
Type 4HOA Direct Drive -A1B,-A2A, -A2B,-B1B, -
C1B 
-D2B  
Rating    
 Maximum continuous, hp.,r.p.m.    
 full throttle at:    
 Sea level pressure altitude  160-2700-S.L. - -  
Takeoff, hp., r.p.m., full throttle at     
 Sea level pressure altitude  160-2700-S.L - -  
Fuel (min grade aviation gasoline) Latest revision of Lycoming 
Service Instruction No. 1070 
- -  
Lubricating oil (Lubricants should conform 
to the specification as listed or subsequent 
revisions) 
Latest revisions of Lycoming 
Spec.No. 301 and Service 
Instruction 1014 
- -  
Bore and Stroke, in. 5.125 x 3.875 - -  
Displacement, cu.in. 320 - -  
Compression ratio 8.50:1 - -  
Weight, lb. See NOTE 9 - -  
C. G. location See NOTE 9 - -  
Propeller shaft flangs, SAE No. AS 127 Type 2 modified - -  
Crankshaft dampers and balancers None - -  
Fuel Injector Bendix RSA -5AD1 - -  
Ignition, dual See NOTE 9 - -  
Timing, °BTC 25 - -  
Spark plugs See NOTE 4 - -  
Oil sump capacity, qt. Dry sump 8  
Minimum usable oil,qt. (30 ° nose up or 
down) 
— —  
Minimum usable oil,qt. (30 ° nose up, 20° 
nose down) 
— 4  
NOTES 1,2,3,4,5,6,7,8,9  - -  
   
“- -” same as preceding:  “—”does not apply. 
 
Certification basis: 
   Date Type Certificate 
No.1E12 
Regulations & Amendments Model Date of Application Issued/Revised 
CAR 13 effective June 15,1956    
As amended by 13-1,13-2,13-3 IO-320-A1A February 16, 1961 April 10, 1961 
 IO-320-A2A February 16, 1961 April 10, 1961 
13-1,13-2,13-3 & 13-4 IO-320-B1A September 18, 1962 January 24, 1963 
 IO-320-B2A September 18, 1962 January 24, 1963 
 IO-320-B1B December 12, 1963 December 31, 1963 
 IO-320-C1A January 18, 1965 May 7, 1965 
 IO-320-B1C April 1, 1965 May 5, 1965 
 IO-320-E2A March 11, 1966 March 28, 1966 
 IO-320-B1D April 11, 1966 April 27, 1966 
 IO-320-D1A February 25, 1969 February 27, 1969 
 IO-320-E1A April 16, 1970 April 21, 1970 
 IO-320-D1B July 24, 1970 August 3, 1970 
 IO-320-E2B May 4, 1972 May 15, 1972 
 AIO-320-A1A June 16, 1969 June 23, 1969 
 AIO-320-A1B June 16, 1969 June 23, 1969 
 AIO-320-A2A June 16, 1969 June 23, 1969 
 AIO-320-A2B June 16, 1969 June 23, 1969 
 AIO-320-B1B June 16, 1969 June 23, 1969 
 AIO-320-C1B July 29, 1971 August 9, 1971 
 LIO-320-B1A August 19, 1969 August 28, 1969

Page 3 of 8 1E12 
Certification basis: (Cont.) 
 
 LIO-320-C1A August 19, 1969 August 28, 1969 
 IO-320-P1A December 19, 1973 January 8, 1974 
 IO-320-E1B January 10, 1974 January 14, 1974 
 AEIO-320-E1A April 2, 1974 April 12, 1974 
 AEIO-320-E1B April 2, 1974 April 12, 1974 
 AEIO-320-E2A April 2, 1974 April 12, 1974 
 AEIO-320-E2B April 2, 1974 April 12, 1974 
 AEIO-320-D1B October 5, 1976 October 8, 1976 
 AEIO-320-D2B May 29, 1980 June 9,1980 
 IO-320-D1C July 24, 1986 August 6, 1986 
 IO-320-B1E August 19, 1986 September 10, 1986 
 IO-320-C1B November 11, 1986 December 3, 1986 
    
 
Production basis:   Production Certificate No. 3 
 
NOTE 1.  Maximum permissible temperatures, ° F: 
 Cylinder head (well-type thermocouple) 500 
 Cylinder base (not applicable to engine models 325 
 which incorporate internal piston cooling oil jets) 
 Oil inlet  245 
 Fuel injector air inlet (IO-320-C1A, F1A 400 
   LIC-320-C1A) 
 
NOTE 2. Pressure limits: 
 
Fuel: Inlet to Diaphragm Pump Inlet to Injector 
   Maximum  
with 
   
   Injector in    
 Maximum Minimum Idle Cut-Off Maximum Minimum Idle 
IO-320-A1A, -A2A,-B1A, 35 -2 - 45 12 - 
 -B1B,-B1C,-B1D,-B1C 
 -B1E,-B2A,-D1A,-D1B, 
 -D1C,-E1A, -E1B, -E2B 
 ,-E2A 
      
IO-320-C1A,-C1B,-F1A* 45 -2 55 45 12 12 
AEIO-320-D & E series 35 -2 - 45 12 - 
LIO-320-B1A 35 -2 - 45 12 - 
LIO-320-C1A, -C1B * 45 -4 55 45 12 12 
AIO-320-A,-B & -C Series 35 -2 55 45 14 - 
 
 
Boost pump outlet limits to injectors: Parallel Boosts Series Boosts 
AIO-320-A, -B & -C Series Maximum Minimum Maximum Minimum 
Zero Fuel Flow 45 p.s.i. - 35 p.s.i. - 
Maximum Fuel Flow - 14 p.s.i. - 14 p.s.i. 
 
 
Oil: Maximum Minimum 
 Normal Operating Starting and Warm-up Normal Idling 
 90 p.s.i. 100 p.s.i. 60 p.s.i. 25 p.s.i. 
 
 Manifold pressure, in. Hg. – Absolute 29 max. (IO-320-C1A, -F1A, LIO-320-C1A) 
 Exhaust back pressure, in. Hg. – Absolute 32 max. (IO-320-C1A, -F1A, LIO-320-C1A) 
 *AN-type fuel pump.

1E12 Page 4 of 8 
 
NOTE 3. The following accessory provisions are incorporated: 
   IO-320      
  
IO-320 
 
IO-320 
-D1A,-E1A 
-E2B, -E2A 
  
Speed 
 
Max. Torque 
Maximum 
Overhang 
 -A1A,-A2A, 
-B1A,-B1C, 
-B1B, 
-C1A,-C1B 
AEIO-320-
E1A, -E1B, 
Rotation 
Facing Drive 
Ratio to ( in.- lb.) Moment 
Accessory -B2A, -B1D -F1A -E2A Pad Crankshaft Cont Static (in. – lb.) 
Starter * * * CC 13.556:1 - 450 150 
Starter ** ** ** CC 16.556:1 - 450 150 
Generator * * - C 1.91:1 60 120 175 
Generator ** ** - C 2.500:1 60 120 175 
Alternator ** * * C 3.250:1 60 120 175 
Fuel pump, plunger * - * - 0.500:1 - - 10 
Fuel Pump - * - CC 1.000:1 25 450 25 
Vacuum Pump * * * CC 1.300:1 70 450 25 
Hydraulic Pump - - - C 1.300:1 100 800 40 
Tachometer * * * C 0.500:1 7 50 5 
Propeller governor - - - C 0.895:1 125 1200 40 
Propeller governor * * * C 0.866:1 125 1200 40 
Optional Dual Drive Mounting on Vacuum Pump Drive Pad 
 
(Vacuum Pump) ** ** ** CC 1.300:1 70 450 6 
(Hydraulic Pump) ** ** ** CC 1.300:1 Total Total 10 
or         
(Vacuum Pump) ** ** ** CC 1.300:1 70 450 6 
(Prop. Governor) ** ** ** CC 1.300:1 Total Total 10 
 
  IO-320 AIO-320-      
 IO-320- 
-E2B, 
-B1E, -D1B, 
-D1C 
-A1A, -A1B, 
-A2A, -A2B, 
 
Rotation  
 
Speed 
 
Max. Torque 
Maximum 
Overhang 
 AEIO-320 AEIO-320 -B1B, Facing Drive Ratio to ( in.- lb.) Moment 
Accessory -E2B -D1B, -D2B -C1B Pad  Crankshaft Cont Static (in. – lb.) 
Starter * * -- CC 13.556:1 - 450 150 
Starter ** ** * CC 16.556:1 - 450 150 
Generator - - - C 1.91:1 60 120 175 
Generator - - - C 2.500:1 60 120 175 
Alternator * * * C 3.250:1 60 120 175 
Fuel pump, plunger * * * - 0.500:1 - - 10 
Fuel Pump - - - CC 1.000:1 25 450 25 
Vacuum Pump * * * CC 1.300:1 70 450 25 
Hydraulic Pump - * - C 1.300:1 100 800 40 
Tachometer * * * C 0.500:1 7 50 5 
Propeller governor - * * C 0.895:1 125 1200 40 
Propeller governor - - - C 0.866:1 125 1200 40 
Optional Dual Drive Mounting on Vacuum Pump Drive Pad 
 
 (Vacuum Pump) - - ** CC 1.300:1 70 450 6 
(Hydraulic Pump) - - ** CC 1.300:1 Total Total 10 
or         
(Vacuum Pump) - - - CC 1.300:1 70 450 6 
(Prop. Governor) - - - CC 1.300:1 Total Total 10 
 “C” – Clockwise, “CC” – Counterclockwise 
• - Standard.  ** - Optional 
 Models with a “2” designation (A2A) have no provision for propeller governor drive

Page 5 of 8 1E12 
 
NOTE 3.  (continued) 
  
 
  
Rotation  
 
Speed 
 
Max. Torque 
Maximum 
Overhang 
 LIO-
320- 
LIO-320 Facing Drive  Ratio to ( in.- lb.) Moment 
Accessory -B1A -C1A Pad Crankshaft Cont Static (in. – lb.) 
Starter * * C 13.556:1 - 450 150 
Starter ** ** C 16.556:1 - 450 150 
Generator - - - 1.91:1 60 120 175 
Generator - - - 2.500:1 60 120 175 
Alternator * * CC 3.250:1 60 120 175 
Fuel pump, plunger * - - 0.500:1 - - 10 
Fuel Pump - * C 1.000:1 25 450 25 
Vacuum Pump * * C 1.300:1 70 450 25 
Hydraulic Pump - - CC 1.300:1 100 800 40 
Tachometer * * CC 0.500:1 7 50 5 
Propeller governor - - - 0.895:1 125 1200 40 
Propeller governor * * CC 0.866:1 125 1200 40 
Optional Dual Drive Mounting on Vacuum Pump Drive Pad 
 
(Vacuum Pump) ** ** C 1.300:1 70 450 6 
(Hydraulic Pump) ** ** C 1.300:1 Total Total 10 
or        
(Vacuum Pump) ** ** C 1.300:1 70 450 6 
(Prop. Governor) ** ** C 1.300:1 Total Total 10 
 “C” – Clockwise, “CC” – Counterclockwise 
 * - Standard.  ** - Optional 
 
NOTE 4.  Spark plugs: See latest revision of Lycoming Service Instruction No. 1042 for approved equipment. 
 
NOTE 5.  This engine incorporates provisions for absorbing propeller thrust in both tractor and pusher type  
  installations. 
 
NOTE 6.  This engine is approved for horizontal helicopter application and operation. 
 
NOTE 7.  These engines incorporate the following similarities or differences: 
  IO-320-A1A -  Basic model – four cylinder, horizontally-opposed, air cooled, direct drive, fuel injection  
     engine with automotive type generator and starter. 
    -A2A - Similar to -A1A but has provisions for fixed pitch propeller. 
    -B1A -  Same as -A1A except that fuel injector is offset toward the fore and aft centerline of engine. 
    -B1B -  Similar to -B1A except has an AN fuel pump drive. 
    -B1C -  Similar to -B1A but has adapter for mounting fuel injector straight to rear. 
    -BID -  Similar to -B1C but has S-1200 series high altitude magnetos. 
    -B2A -  Similar to -BIA but has provisions for fixed pitch propeller. 
    -B1E - Same as – D1C except horizontal fuel injector 
    -C1A -  Normally aspirated, similar to -B1B except has features making it suitable for turbo  
     supercharging by STC.  See limits, NOTES 1 and 2.  Incorporates internal piston cooling oil  
     nozzles. 
    -C1B Same as –C1A except horizontal rear mounted fuel injector 
    -DIA - Similar to -B1D except has type 1 Dynafocal mounts, S4LN-1227 and S4LN-1209 magnetos  
     and has fuel injection mounted vertically under the sump. 
     -DIB - Similar to -DIA except has propeller governor drive located on left front of crankcase 
instead  
      of on accessory housing. 
     -D1C Same as –D1B except Slick Magnetos 
     -EIA - Identical to -E2A except has provisions for controllable pitch propeller. 
     -E1B - Similar to -E1A except is equipped with Slick 4050 and 4051 magnetos. 
     -E2A - Similar to -A2A except uses Scintilla S4LN-20 and S4LN-21 magnetos, has straight conical  
      mounts, and has fuel injector mounted under the sump. 
     -E2B - Similar to -E2A but is equipped with Slick 4050 and 4051 magnetos. 
     -F1A - Similar to -C1A except has Type 1 (30°) dynafocal mount attachment instead of  Type 2

1E12 Page 6 of 8 
      (18°) mount attachment.

Page 7 of 8 1E12 
  AIO-320-A1A - Similar to IO-320-B1D except permits operation in an inverted position.  Differences 
include 
      a front mounted propeller governor, two dry oil sumps, dual external oil scavenge pumps, 
an  
      oil tank, three options of position for fuel injector mounting and Type 1 Dynafocal mount. 
     -A1B - Similar to AIO-320-A1A except uses one impulse coupling magneto. 
     -A2A - Similar to AIO-320-A1A but uses a fixed pitch propeller. 
     -A2B - Similar to AIO-320-A1A but uses one impulse coupling magneto and has a fixed pitch  
      propeller. 
     -B1B - Similar to AIO-320-A1B except has front mounted fuel injector. 
     -C1B - Identical to AIO-320-B1B except that the fuel injector is vertically mounted on bottom of  
      sump in a forward position. 
  LIO-320-B1A - Similar to IO-320-B1A except counter clockwise rotation of engine and reverse rotation of  
      accessories.   Uses modified starter ring gear, crankshaft, cam shaft, accessory housing and  
      oil pump body. 
        -C1A - Similar to IO-320-C1A except incorporates changes shown for LIO-320-B1A.  Suitable for  
      turbo-supercharging – See limits, NOTES 1 and 2. 
   AEIO-320-D1B-  Similar to IO-320-D1B except is equipped with an inverted oil system kit for aerobatic 
flight. 
       -D2B Same as AEIO-320-D1A except no provision for propeller governor. 
       -E1A - Similar to IO-320-E1A except I equipped with an inverted oil system kit for aerobatic 
flight. 
       -E1B - Similar to IO-320-E1B except is equipped with an inverted oil system kit for aerobatic 
flight. 
       -E2A - Similar to IO-320-E2A except is equipped with an inverted oil system kit for aerobatic  
       flight. 
       -E2B - Similar to IO-320-E2B except is equipped with an inverted oil system kit for aerobatic 
flight. 
 
NOTE 8.  Starters, generators and alternators approved for use on these engines are listed in the latest revision of AVCO  
  Lycoming Service Instruction No. 1154. 
 
NOTE 9.  The following tabulation shows weights, C.G.s and magnetos for these models: 
 
 Center of Gravity 
  From front face 
of Prop. Shaft 
 
Off Crankshaft 
 
Ignition Dual 
Model *Weight Flange;in. Center Line, in. Bendix + Slick 
IO-320-A1A 252 14.59 1.24 Below-.17 Left S4LN-200,S4LN-204 - 
 -A2A 252 14.59 1.24 Below-.17 Left S4LN-200,S4LN-204 - 
 -B1A 259 14.61 1.02 Below-.08 Left S4LN-20,S4LN-21 or S4LN-21, 
S4LN-21 
- 
 -B1B 257 14.61 1.02 Below-.08 Left S4LN-20,S4LN-21 or S4LN-21,  
S4LN-21 
- 
 -B1C 259 14.61 1.02 Below-.08 Left S4LN-20,S4LN-21 or S4LN-21,  
S4LN-21 
- 
 -B1D 260 14.61 1.02 Below-.08 Left S4LN-1209, S4LN-1208 - 
-B1E 264 14.06 1.31 Below- .03 Right - 4251, 4250 
 -B2A 259 14.61 1.02 Below-.08 Left S4LN-20,S4LN-21 or S4LN-21,  
S4LN-21 
- 
 -C1A 269 14.61 1.02 Below-.08 Left S4LN-21,S4LN-21 - 
-C1B 269 14.61 1.02 Below-.08 Left S4LN-21,S4LN-21 - 
 -D1A 261 14.59 1.24 Below-.17 Left S4LN-1227, S4LN-1209 - 
 -D1B 263 14.59 1.24 Below-.17 Left S4LN-1227, S4LN-1209 - 
-D1C 263 13.77 1.44 Below-.03 Right - 4251, 4250 
 -E1A 255 14.59 1.24 Below-.17 Left S4LN-20,S4LN-21 - 
 -E1B 253 14.59 1.24 Below-.17 Left - 4051, 4050 
 -E2A 255 14.59 1.24 Below-.17 Left S4LN-20,S4LN-21 - 
 -E2B 255 14.59 1.24 Below-.17 Left - 4051, 4050 
 -F1A 269 14.61 1.02 Below-.08 Left S4LN-21,S4LN-21 - 
AIO-320-A1A 275 14.74 0.93 Below-.01 Left S4LN-1208, S4LN-1209 - 
 -A1B 276 14.74 0.93 Below-.01 Left S4LN-1227, S4LN-1209 -

1E12 Page 8 of 8 
 -A2A 275 14.74 0.93 Below-.01 Left S4LN-1208, S4LN-1209 - 
 -A2B 276 14.74 0.93 Below-.01 Left S4LN-1227, S4LN-1209 - 
 -B1B 276 14.74 0.93 Below-.01 Left S4LN-1227, S4LN-1209 - 
 -C1B 276 14.74 0.93 Below-.01 Left S4LN-1227, S4LN-1209 - 
LIO-320-B1A 262 14.61 1.02 Below-.08 Left S4RN-21,S4RN-20 or S4RN-21, 
S4RN-21 
- 
 -C1A 269 14.61 1.02 Below-.08 Left S4RN-21, S4RN-21 
 
- 
AEIO-320-D1B 271 14.59 1.24 Below-.17 Left S4LN-1227, S4LN-1209 - 
-D2B 271 14.59 1.24 Below-.17 Left S4LN-1227, S4LN-1209 - 
-E1A 262 14.59 1.24 Below-.17 Left S4LN-21, S4LN-20 - 
 -E1B 258 14.59 1.24 Below-.17 Left - 4051, 4050 
 -E2A 262 14.59 1.24 Below-.17 Left S4LN-21, S4LN-20 - 
 -E2B 260 14.59 1.24 Below-.17 Left - 4051, 4050 
      
      
      
      
* Standard engine dry weight less starter and generator/alternator.  
+ For alternate magnetos see latest issue of Textron Lycoming Service Instruction 1443 
 
 
...END...
```

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- [AD 2006-12-07](https://openairdocs.org/ad/2006-12-07): ECi cylinder assemblies · Aerostar AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1A and 386 more. Effective Jul 11, 2006
- [AD 2004-10-14](https://openairdocs.org/ad/2004-10-14): Crankshaft gear · Lycoming Engines AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1A and 642 more. Effective Jun 25, 2004
- [AD 2003-14-03](https://openairdocs.org/ad/2003-14-03): Rotary fuel pumps · Lycoming Engines AEIO-540-D4A5, AEIO-540-D4B5, AEIO-540-D4C5 and 262 more. Effective Aug 14, 2003
- [AD 98-17-11](https://openairdocs.org/ad/98-17-11): Crankshafts · Continental Motors A-65-3, A-65-8, A75-8 and 90 more. Effective Oct 19, 1998
- [AD 98-02-08](https://openairdocs.org/ad/98-02-08): Crankshaft · Lycoming Engines AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1A and 216 more. Effective Mar 30, 1998
- [AD 97-15-11](https://openairdocs.org/ad/97-15-11): Cylinder kits · Lycoming Engines AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1A and 538 more. Effective Aug 12, 1997
- [AD 96-23-03](https://openairdocs.org/ad/96-23-03): High pressure fuel pumps · Lycoming Engines AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1A and 174 more. Effective Dec 23, 1996
- [AD 96-09-10](https://openairdocs.org/ad/96-09-10): Oil pump · Lycoming Engines AEIO-320-E1A, AEIO-320-E1B, AEIO-320-E2A and 334 more. Effective Jul 15, 1996
- [AD 95-26-02](https://openairdocs.org/ad/95-26-02): Aviation Gasoline · Lycoming Engines IO-320-B1A, IO-320-B1B, IO-320-B1C and 182 more. Effective Jan 24, 1996
- [AD 92-12-05](https://openairdocs.org/ad/92-12-05): Piston Pins · Lycoming Engines AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1A and 532 more. Effective Jul 10, 1992
- [AD 90-04-06 R1](https://openairdocs.org/ad/90-04-06-R1): Propeller Governor External Oil Line · Lycoming Engines AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1A and 427 more. Effective May 28, 1991
- [AD 87-10-06 R1](https://openairdocs.org/ad/87-10-06-R1): Rocker Arm Assembly · Lycoming Engines IO-360-B4, IVO-360-A1A, O-340-A1A and 243 more. Effective Sep 1, 1989
- [AD 81-16-05](https://openairdocs.org/ad/81-16-05): Magnetos · Lycoming Engines AEIO-320-E1B, AEIO-320-E2B, AEIO-360-B1G6 and 234 more. Effective Aug 6, 1981
- [AD 80-06-05](https://openairdocs.org/ad/80-06-05): Magnetos · Lycoming Engines AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1A and 254 more. Effective Mar 28, 1980
- [AD 79-04-05](https://openairdocs.org/ad/79-04-05): Regulator Diaphragm Stem Assembly · Lycoming Engines AEIO-320-D1B, AEIO-320-E1A, AEIO-320-E1B and 215 more. Effective Sep 26, 1979
- [AD 78-23-10](https://openairdocs.org/ad/78-23-10): Center Body Bellows Seal Assembly · Lycoming Engines AEIO-320-D1B, AEIO-320-E1A, AEIO-320-E1B and 218 more. Effective Nov 7, 1978
- [AD 75-08-09](https://openairdocs.org/ad/75-08-09): Oil Pump Drive Shaft · Lycoming Engines AEIO-360-A1B, AEIO-360-A1B6, AEIO-360-A1C and 365 more. Effective Aug 18, 1977
- [AD 73-23-01](https://openairdocs.org/ad/73-23-01): Piston Pin Assembly · Lycoming Engines AIO-360-A1A, AIO-360-A1B, AIO-360-A2A and 215 more. Effective Jan 13, 1977
- [AD 75-09-15](https://openairdocs.org/ad/75-09-15): Fuel Starvation To The Engine · Lycoming Engines AIO-320-A1A, AIO-320-A1B, AIO-320-A2A and 130 more. Effective Apr 30, 1975
- [AD 73-10-02](https://openairdocs.org/ad/73-10-02): Bendix Fuel Injectors · Bendix Fuel Injectors, AIO-320-A1A, AIO-320-A1B and 88 more. Effective May 16, 1973
- [AD 66-06-03](https://openairdocs.org/ad/66-06-03): Connecting Rod Assemblies · Lycoming Engines GO-435-C2 (O-435-17), GO-435-C2A, GO-435-C2A2 and 317 more. Effective Jan 16, 1969
- [AD 67-22-06](https://openairdocs.org/ad/67-22-06): Fuel Injectors · Lycoming Engines HIO-360-A1A, HIO-360-B1A, HIO-360-B1B and 28 more. Effective Aug 9, 1967
- [AD 65-03-03](https://openairdocs.org/ad/65-03-03): Crankshaft Flange · Lycoming Engines IO-320-B1A. Effective Aug 5, 1967
- [AD 66-20-04](https://openairdocs.org/ad/66-20-04): Oil Filter Adapter Gasket · Lycoming Engines IO-320-A1A, IO-320-A2A, IO-320-B1A and 121 more. Effective Aug 27, 1966
- [AD 64-16-05](https://openairdocs.org/ad/64-16-05): AC Pumps · Lycoming Engines HIO-360-B1A, HIO-360-B1B, IO-320-B1A and 86 more. Effective Jul 10, 1964
- [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
- [AD 2011-26-04](https://openairdocs.org/ad/2011-26-04) (historical): Externally mounted fuel injector fuel lines · Lycoming Engines AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1B and 186 more. Effective Jan 25, 2012
- [AD 2011-15-10](https://openairdocs.org/ad/2011-15-10) (historical): Fuel servos · Lycoming Engines AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1A and 256 more. Effective Aug 16, 2011
- [AD 2008-19-05](https://openairdocs.org/ad/2008-19-05) (historical): Parallel Valve'' reciprocating engines · Engine Components Reciprocating Engine Cylinder Assemblies, AEIO-320-D1B, AEIO-320-D2B and 262 more. Effective Oct 20, 2008
- [AD 2008-14-07](https://openairdocs.org/ad/2008-14-07) (historical): Externally mounted fuel injector fuel lines · Textron Lycoming, AVCO AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1B and 185 more. Effective Aug 14, 2008
- [AD 2008-08-14](https://openairdocs.org/ad/2008-08-14) (historical): Fuel injection servo plugs · Superior Air Parts AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1A and 242 more. Effective Apr 29, 2008
- [AD 2005-26-10](https://openairdocs.org/ad/2005-26-10) (historical): ECi cylinder assemblies. · Lycoming Engines AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1A and 413 more. Effective Jan 31, 2006
- [AD 2002-26-01](https://openairdocs.org/ad/2002-26-01) (historical): Fuel injector fuel lines · Textron Lycoming, AVCO IGO-480-A1B6, IGO-540-B1A, IGO-540-B1C and 178 more. Effective Jan 31, 2003
- [AD 98-18-12](https://openairdocs.org/ad/98-18-12) (historical): Fuel Pump · Textron Lycoming, AVCO AEIO-540-D4A5, AEIO-540-D4B5, AEIO-540-D4C5 and 249 more. Effective Sep 28, 1998
- [AD 81-18-04 R2](https://openairdocs.org/ad/81-18-04-R2) (historical): Engine Oil Pump Driven Impeller and Shaft · Textron Lycoming, AVCO AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1A and 376 more. Effective Jun 7, 1982
- [AD 2008-06-51](https://openairdocs.org/ad/2008-06-51) (historical): Fuel injection servo plugs · Lycoming Engines AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1A and 235 more

## Registered aircraft by registry model (OpenAirDocs)

- [Lycoming IO-320 series](https://openairdocs.org/engine/lycoming-io-320-series): 1,707 aircraft (registry code 41509)
- [Lycoming AEIO-320 series](https://openairdocs.org/engine/lycoming-aeio-320-series): 74 aircraft (registry codes 41500, 41567)
- [Lycoming IO-320-D1A](https://openairdocs.org/engine/lycoming-io-320-d1a): 58 aircraft (registry code 42394)
- [Lycoming IO-320-B1A](https://openairdocs.org/engine/lycoming-io-320-b1a): 55 aircraft (registry code 41907)
- [Superior IO-320-A](https://openairdocs.org/engine/superior-io-320-a-series): 13 aircraft (registry code 59254)
- [Lycoming IO-320-E2A](https://openairdocs.org/engine/lycoming-io-320-e2a): 11 aircraft (registry code 41919)
- [Lycoming IO-320-C1A](https://openairdocs.org/engine/lycoming-io-320-c1a): 7 aircraft (registry code 41913)
- [Lycoming AEIO-320-E1B](https://openairdocs.org/engine/lycoming-aeio-320-e1b): 6 aircraft (registry code 41926)
- [Lycoming AEIO-320-E2B](https://openairdocs.org/engine/lycoming-aeio-320-e2b): 6 aircraft (registry code 41928)
- [Lycoming IO-320-D1B](https://openairdocs.org/engine/lycoming-io-320-d1b): 6 aircraft (registry code 41917)
- [Superior IO-320 series](https://openairdocs.org/engine/superior-io-320-series): 6 aircraft (registry code 59267)
- [Lycoming IO-320-E2B](https://openairdocs.org/engine/lycoming-io-320-e2b): 4 aircraft (registry code 41921)
- [Lycoming IO-320-E1A](https://openairdocs.org/engine/lycoming-io-320-e1a): 3 aircraft (registry code 41918)
- [Lycoming IO-320-E1B](https://openairdocs.org/engine/lycoming-io-320-e1b): 3 aircraft (registry code 41920)
- [Lycoming AEIO-320-D1B](https://openairdocs.org/engine/lycoming-aeio-320-d1b): 2 aircraft (registry code 41929)
- [Lycoming IO-320-A1A](https://openairdocs.org/engine/lycoming-io-320-a1a): 2 aircraft (registry code 41905)
- [Lycoming IO-320-B1C](https://openairdocs.org/engine/lycoming-io-320-b1c): 2 aircraft (registry code 41909)
- [Lycoming IO-320-B2A](https://openairdocs.org/engine/lycoming-io-320-b2a): 1 aircraft (registry code 41912)
- [Lycoming LIO-320-C1A](https://openairdocs.org/engine/lycoming-lio-320-c1a): 1 aircraft (registry code 41924)
- [Lycoming AEIO-320-D2B](https://openairdocs.org/engine/lycoming-aeio-320-d2b): 0 aircraft (registry code 41930)
- [Lycoming AEIO-320-E1A](https://openairdocs.org/engine/lycoming-aeio-320-e1a): 0 aircraft (registry code 41925)
- [Lycoming AEIO-320-E2A](https://openairdocs.org/engine/lycoming-aeio-320-e2a): 0 aircraft (registry code 41927)
- [Lycoming AIO-320-A1A](https://openairdocs.org/engine/lycoming-aio-320-a1a): 0 aircraft (registry code 41931)
- [Lycoming AIO-320-A1B](https://openairdocs.org/engine/lycoming-aio-320-a1b): 0 aircraft (registry code 41932)
- [Lycoming AIO-320-A2A](https://openairdocs.org/engine/lycoming-aio-320-a2a): 0 aircraft (registry code 41933)
- [Lycoming AIO-320-A2B](https://openairdocs.org/engine/lycoming-aio-320-a2b): 0 aircraft (registry code 41934)
- [Lycoming AIO-320-B1B](https://openairdocs.org/engine/lycoming-aio-320-b1b): 0 aircraft (registry code 41935)
- [Lycoming AIO-320-C1B](https://openairdocs.org/engine/lycoming-aio-320-c1b): 0 aircraft (registry code 41936)
- [Lycoming IO-320-A2A](https://openairdocs.org/engine/lycoming-io-320-a2a): 0 aircraft (registry code 41906)
- [Lycoming IO-320-B1B](https://openairdocs.org/engine/lycoming-io-320-b1b): 0 aircraft (registry code 41908)
- [Lycoming IO-320-B1E](https://openairdocs.org/engine/lycoming-io-320-b1e): 0 aircraft (registry code 41910)
- [Lycoming IO-320-C1B](https://openairdocs.org/engine/lycoming-io-320-c1b): 0 aircraft (registry code 41914)
- [Lycoming IO-320-D1C](https://openairdocs.org/engine/lycoming-io-320-d1c): 0 aircraft (registry code 41915)
- [Lycoming IO-320-F1A](https://openairdocs.org/engine/lycoming-io-320-f1a): 0 aircraft (registry code 41922)
- [Lycoming LIO-320-B1A](https://openairdocs.org/engine/lycoming-lio-320-b1a): 0 aircraft (registry code 41923)

## STCs approved under this data sheet (45)

- [STC SE04651CH](https://openairdocs.org/stc/SE04651CH): To allow use of l00R grade aviation fuel meeting Swift Fuel, LLC specification SPEC-l00R-22. Swift Fuels LLC
- [STC SE00825WI](https://openairdocs.org/stc/SE00825WI): Installation of Specialty Products Spin-on oil filter on Lycoming Engines.. B & C Specialty Products Inc.
- [STC SE04349CH](https://openairdocs.org/stc/SE04349CH): Installation of SureFly electronic ignition. SureFly Partners Ltd.
- [STC SE01954SE](https://openairdocs.org/stc/SE01954SE): Installation of engine crankcase seal.. Ly-Con Rebuilding Company
- [STC SE02352CH](https://openairdocs.org/stc/SE02352CH): Installation of Challenger cleanable oil filter assembly. Challenger Aviation Products Inc.
- [STC SE00939WI](https://openairdocs.org/stc/SE00939WI): Installation of B&C Specialty Products Model BC 315-( ) Starter on Lycoming engines.. B & C Specialty Products Inc.
- [STC SE2452CE](https://openairdocs.org/stc/SE2452CE): Installation of B&C Specialty Products lightweight (10.2 pounds) engine starter PN BC315-100-1(12 volt) or PN BC315-100-3(24 volt) on engines with ring gears having 122 teeth and PN BC315-100-2 (12 volt) or PN BC315-100-4 (24 volt) on engines with ring gears having 149 teeth.. B & C Specialty Products Inc.
- [STC SE03232CH](https://openairdocs.org/stc/SE03232CH): Installation of Engine Preheat Kit p/n TA2925-1 for 115 volt application. Hartzell Propeller Inc.
- [STC SE14WE](https://openairdocs.org/stc/SE14WE): Installation of one Rajay Turbocharger P/N RJ 0325, RJ 0326, RJ 0326-1, or RJ 0326-2. TALCO Aviation
- [STC SE04577CH](https://openairdocs.org/stc/SE04577CH): Install an electronic engine ignition system. Electroair Acquisition Corp
- [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.
- [STC SE8628SW](https://openairdocs.org/stc/SE8628SW): Installation of oil nozzles for lubrication of cam and filters.. Cygnet Aerospace Corp
- [STC SE09445SC](https://openairdocs.org/stc/SE09445SC): Installation of fuel injector nozzles.. General Aviation Modifications Inc.
- [STC SE03215CH](https://openairdocs.org/stc/SE03215CH): STC for the conversion of Lycoming O-320-A, B, C, D, E; IO-320-A, B, C, D, E, F; AIO-320-A, B; AEIO-320-D, E to increase engine displacement to 340 cubic inches by installation of a crankshaft with a longer stroke. Continental Motors, Inc.
- [STC SE1339SW](https://openairdocs.org/stc/SE1339SW): Modify pistons to Drawings 11007 and 11015; piston rings. Continental Motors, Inc.
- [STC SE4408SW](https://openairdocs.org/stc/SE4408SW): Miscellaneous engine cylinder replacement parts.. Continental Motors, Inc.
- [STC SE8776SW](https://openairdocs.org/stc/SE8776SW): Installation of coated cylinders and piston rings.. Continental Motors, Inc.
- [STC SE00218NY](https://openairdocs.org/stc/SE00218NY): Replacement of Lycoming starter with SKY-TEC 12 volt starter installed.. Hartzell Engine Technologies, LLC
- [STC SE00226NY](https://openairdocs.org/stc/SE00226NY): Replacement of Lycoming starter with SKY-TEC 24-volt starter Models 149-24HT and 122-24HT. Approval limited to 24-volt DC source available to the starter.. Hartzell Engine Technologies, LLC
- [STC SE00357NY](https://openairdocs.org/stc/SE00357NY): Replacement of Lycoming starter with SKY-TEC 24-volt starter installed.. Hartzell Engine Technologies, LLC
- [STC SE2901NM](https://openairdocs.org/stc/SE2901NM): Lycoming valve cover gasket. Real Gaskets Tennessee
- [STC SE02409AK](https://openairdocs.org/stc/SE02409AK): Installation of the Superior Air Parts Cold Air Induction System (CAIS). Wattum Aircraft Services
- [STC SE910SO](https://openairdocs.org/stc/SE910SO): Installation of fuel line filters into the individual fuel injector lines in accordance with Beryl D Shannon Aviation Specialties, Inc. Installation Instruction BI 2505, approved September 17, 1976 or later FAA approved revisions.. D'Shannon Products Ltd.
- [STC SE00590DE](https://openairdocs.org/stc/SE00590DE): Installation of modified Lubricated Camshaft. Centri-Lube Technologies LLC
- [STC SE02555AT](https://openairdocs.org/stc/SE02555AT): Consolidated Fuel Systems 201F series fuel pump assembly on various Textron Lycoming engine models.. Kelly Aerospace Energy Systems LLC
- [STC SE01524CH](https://openairdocs.org/stc/SE01524CH): Replace Slick 6000, 6100, 6200, 6300, 4000, 4100, 4200, and 4300 series magnetos and TCM/Bendix S6-20, S6-200, S6-1200, S-20, S-200, and S-1200 series magnetos with Champion Limited Authority Spark Advance Regulator (LASAR ) Model 4755 and 6755 bush kit ignition systems.. Champion Aerospace LLC
- [STC SE524CH](https://openairdocs.org/stc/SE524CH): Replace Slick 4000, 4100, 4200, and 4300 series magnetos and TCM/Bendix S-20, S-200, and S-1200 series magnetos with the Champion Limited Authority Spark Advance Regulator (LASAR ). Champion Aerospace LLC
- [STC SE859GL](https://openairdocs.org/stc/SE859GL): Replacement of Bendix S4LN-20, -21, -1209, or -1227 model magnetos with Slick Model 4250 or 4251 magnetos.. Champion Aerospace LLC
- [STC SE8193SW](https://openairdocs.org/stc/SE8193SW): Grind nitriden high compression cylinder barrles to plus .010 oversize and install SL75089 P10 piston, SL74242 P10 compression ring, and SL73857 P10 oil ring.. Superior Air Parts Inc.
- [STC SA4005NM](https://openairdocs.org/stc/SA4005NM): Precise Flight Inc. Pulselite Control System. Precise Flight Inc
- [STC SE01930NY](https://openairdocs.org/stc/SE01930NY): Installation of Casper Labs 90 degree oil filter housing adapter.. Casper Labs Inc
- [STC SE1779NM](https://openairdocs.org/stc/SE1779NM): Installation of Precise Flight, Inc. Standby Vacuum System SVS III. Precise Flight Inc
- [STC SE5743NM](https://openairdocs.org/stc/SE5743NM): Intallation of adapter for externally mounted oil filter.. Aviation Development Corporation
- [STC SE09492SC](https://openairdocs.org/stc/SE09492SC): Installation and usage of Exxon 20W50 multigrade aircraft engine oil conforming to Exxon Oil formulation WS-3013.. Exxon Company USA
- [STC SE00590LA](https://openairdocs.org/stc/SE00590LA): Installation of Nickson's cylinder barrels on Lycoming reciprocating engine models.. Nickson's Machine Shop Inc
- [STC SE00350SE](https://openairdocs.org/stc/SE00350SE): Installation of sump mounted chip detector.. Aviation Development Corporation
- [STC SE8023SW](https://openairdocs.org/stc/SE8023SW): Installation and usage of AEROSHELL. Shell Development Co
- [STC SE7CE](https://openairdocs.org/stc/SE7CE): Modification of oil sump in accordance with Champion Drawing No. 7-1312F.. American Champion Aircraft
- [STC SE452NE](https://openairdocs.org/stc/SE452NE): Installation and usage of 'Mobil AV 1' aviation oil.. Mobil Research & Development Corp
- [STC SE5879SW](https://openairdocs.org/stc/SE5879SW): Use of Phillips X/C II 20W-50 and25W-60 oil (OSS 55875) in all Avco reciprocating aircraft engines from 65 to 450 BHP.. Phillips Petroleum Co
- [STC SE5924SW](https://openairdocs.org/stc/SE5924SW): Installation of stainless steel replacement exhaust studs on AVCO engines.. Perrigo & Steele Aircraft Engr Company
- [STC SE244NE](https://openairdocs.org/stc/SE244NE): Installation of Mattituck plasma flame sprayed cylinder barrels in Teledyne reciprocating engines.. Mattituck Airbase, Inc
- [STC SE80NE](https://openairdocs.org/stc/SE80NE): Installation and usage of Bel-Ray synthetic aviation oil, Bel-Ray Aero 1, (nonsupercharged), horizontally opposed direct drive, aircraft engines of 350 hp. or less.. Bel-Ray Company, Inc
- [STC SE1445SO](https://openairdocs.org/stc/SE1445SO): Use of Aero-blend oil additive in Teledyne (non turbocharged) aircraft engines.. ProTec
- [STC SE128NE](https://openairdocs.org/stc/SE128NE): Use of AMS/OIL 15W 50 synthetic piston aircraft oil in Avco engines.. AMS/OIL

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OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.