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

Lycoming LTIO-540-F2BD

1 aircraft on the U.S. register carry a Lycoming LTIO-540-F2BD engine, rated at about 325 horsepower. The Piper PA-31 Navajo and Chieftain is the model most often fitted with it (1 aircraft).

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 LTIO-540-F2BD. FAA spelling: LTIO-540-F2BD.

Fitted to model families

Piper PA-31 Navajo and Chieftain1

Piper PA-31 Navajo and Chieftain

Where they are owner's state

Nevada1

Kind of aircraft

Piston twins1 (100%)

When the aircraft were built by decade

0001111970

What the FAA has certified, ordered and been told about the Lycoming LTIO-540-F2BD the component layer

The design is held under 1 type certificate (E14EA, held by Lycoming Engines). The FAA has issued 33 airworthiness directives (orders that owners must comply with) that name this engine series. Operators and repair shops have filed 14 failure reports with the FAA since 1995, 3 of them in the last ten years.

FAA orders 33 airworthiness directives · newest first

2026-04-082026-04-11 · Engine (Reciprocating) · engine
2024-12-052024-21-02 · Engine (Reciprocating) · engine
2015-11-032015-19-07 · Fuel injector fuel lines · engine
2012-10-242012-19-01 · Crankshafts · engine
2012-02-242012-03-06 · Fuel servo diaphragm · engine
2012-01-252011-26-04 · Externally mounted fuel injector fuel lines · engine

All orders naming the Lycoming LTIO-540-F2BD

Failure reports 14 since · what operators and shops told the FAA

001229697980103040508101415120

Parts most often reported as the reports name them

Bolt1Camshaft1Coil1Combustion Liner1Cylinder Head1Downlock Arm1Filter1Hose1Latch1Reservoir1

Latest reports

2020-06-07Cylinder Head: failed
2015-11-04Spring: worn
2014-12-18Latch: detached
2010-05-25Turbocharger: leaking
2008-06-10Reservoir: low

Certificates and bulletins

E14EAType certificate held by Lycoming Engines · 40 models listed · revised May 24, 2012

Safety bulletins 7 · 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
2011-03-31NE-08-26R3 · Magneto/Distributor
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-ltio-540-f2bd.json · about the eFlight graph.

Aircraft newest certificates first · 1

Tail no.Maker and modelGroupOwner and baseCertificateRegisteredStatus
N99TB Piper
PA-31-325
Fixed-wing, multi-engine Individual owner
Nevada
Standard 2024-11-12 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.