The U.S. aircraft register, updated daily
Engines · piston (reciprocating) · data as of October 5, 2026

Lycoming O-320-D1D

4 aircraft on the U.S. register carry a Lycoming O-320-D1D engine, rated at about 160 horsepower. The Grumman American Avn. Corp. GA-7 is the model most often fitted with it (1 aircraft). The aircraft carrying it were built between 1978 and 2026.

The FAA records engines by code, usually at the level of a series ("O-320 series") rather than the exact variant; this page gathers every FAA code that reads as Lycoming O-320-D1D. FAA spelling: O-320-D1D.

Fitted to model families

Grumman American Avn. Corp. GA-71Gulfstream American Corp GA-71Isaac Paul Muller GLASTAR1Ward Travis E TRAVEL AIR1

Grumman American Avn. Corp. GA-7 · Gulfstream American Corp GA-7 · Isaac Paul Muller GLASTAR · Ward Travis E TRAVEL AIR

Where they are owner's state

Virginia1Utah1Idaho1Florida1

Kind of aircraft

Piston twins2 (50%)Piston singles2 (50%)

When the aircraft were built by decade

001222197012020

What the FAA has certified, ordered and been told about the Lycoming O-320-D1D the component layer

The design is held under 1 type certificate (E-274, held by Lycoming Engines). The FAA has issued 14 airworthiness directives (orders that owners must comply with) that name this engine series. Operators and repair shops have filed 13 failure reports with the FAA since 1995, 1 of them in the last ten years.

FAA orders 14 airworthiness directives · newest first

2026-04-082026-04-11 · Engine (Reciprocating) · engine
2024-12-052024-21-02 · Engine (Reciprocating) · engine
2012-03-272012-03-07 · Carburetor · engine
2008-10-202008-19-05 · Parallel Valve'' reciprocating engines · engine
2006-01-312005-26-10 · ECi cylinder assemblies. · engine
2004-06-252004-10-14 · Crankshaft gear · engine

All orders naming the Lycoming O-320-D1D

Failure reports 13 since · what operators and shops told the FAA

0122396979899000305061011126

Parts most often reported as the reports name them

Magneto2Actuator1Bearing1Bolt1Bypass Valve1Connecting Rod1Connector1Control Cable1Horn1Impulse Coupling1

Latest reports

2026-09-25Impulse Coupling: destroyed
2011-03-28Bypass Valve: missing
2010-01-07Spar: corroded
2006-06-10Actuator: worn
2005-02-20Bolt: broken

Certificates and bulletins

E-274Type certificate held by Lycoming Engines · 60 models listed · revised April 30, 2013

Safety bulletins 6 · advice, not orders

2019-05-02NE-19-08 · Reciprocating Engine Cylinder Section - Lycoming Engines Parallel Valve Cylinders
2016-05-13NE-08-32R1 · Propeller Governor Idler Gear Shaft Set Screw
2014-03-24NE-14-13 · Reciprocating Engine - Cylinder Mounting Studs
2012-11-21NE-13-06 · Pushrod Shroud Spring Retainers, Engine Components Part No. AEL14995, for Lycoming Engines 320,...
2008-09-10NE-06-32R1 · Reciprocating Engine - Crankshaft

Sources: the FAA's type certificate data sheets, airworthiness directives, supplemental type certificates, special conditions and special airworthiness information bulletins (Dynamic Regulatory System), and the FAA's service difficulty reports. A failure report is what an operator or repair station chose to file; the counts show reporting as much as reliability, and larger and commercial fleets report more. How the systems are grouped.

Connections how this engine series links to the rest of the register

Fitted to
Where they are
Airworthiness

These connections as data: /graph/engine/lycoming-o-320-d1d.json · about the eFlight graph.

Aircraft newest certificates first · 4

Tail no.Maker and modelGroupOwner and baseCertificateRegisteredStatus
N5838M Isaac Paul Muller
GLASTAR
Fixed-wing, single engine Individual owner
Idaho
Experimental 2025-11-13 ValidFAA registration status code V: Valid registration. All codes
N778JN Gulfstream American Corp
GA-7
Fixed-wing, multi-engine Co-owned owner
Florida
Standard 2023-12-24 ValidFAA registration status code V: Valid registration. All codes
N702TK Ward Travis E
TRAVEL AIR
Fixed-wing, single engine Individual owner
Utah
Experimental 2019-07-12 ValidFAA registration status code V: Valid registration. All codes
N619AB Grumman American Avn. Corp.
GA-7
Fixed-wing, multi-engine Avenge Holdings LLC
Ashburn, Virginia
Standard 2016-12-20 ValidFAA registration status code V: Valid registration. All codes

Source: FAA Civil Aviation Registry, Releasable Aircraft Database (the engine reference table and each aircraft's engine code), October 5, 2026. Horsepower and thrust are the FAA's figures for the series, not for a particular aircraft.