- Manufacturer (registry)
- LYCOMING
- Model
- IO-540-C4D5
- Registry code
- 41656
- Installed in
- 0 registered aircraft
- Type
- Reciprocating
- Power
- 250 hp
- Data sheet
- TCDS1E4
- Holder
- Lycoming Engines
Model codes come from the FAA registry’s reference file.
On this page
Airworthiness directives that may apply · 21
ADs whose products match this engine model. Each AD’s applicability may narrow it by serial number, part number or configuration.
| 1969 | 1 |
|---|---|
| 1977 | 1 |
| 1982 | 1 |
| 1992 | 1 |
| 1996 | 3 |
| 1997 | 1 |
| 1998 | 1 |
| 2002 | 1 |
| 2003 | 1 |
| 2004 | 2 |
| 2005 | 1 |
| 2006 | 4 |
| 2007 | 1 |
| 2008 | 2 |
| 2009 | 1 |
| 2010 | 1 |
| 2011 | 1 |
| 2012 | 2 |
| 2024 | 1 |
| 2026 | 2 |
Engine · Lycoming IO-540-C4D5
AD 2026-17-10Reciprocating Engine Cylinder SectionAD 2026-04-11Engine (Reciprocating)AD 2012-19-01CrankshaftsQuery with SQL
duckdb -csv -c "SELECT d.ad_number, d.status, d.subject, d.effective_date
FROM 'https://openairdocs.org/data/latest/faa_directive.parquet' d
WHERE d.ad_id IN (SELECT ad_id FROM 'https://openairdocs.org/data/latest/faa_engine_model_directive.parquet' WHERE engine_model_code IN ('41656'))
ORDER BY coalesce(d.effective_date, d.publication_date, d.issue_date) DESC, d.ad_number DESC"Prints the whole list as CSV. It reads the release’s Parquet files over HTTPS, so there’s nothing to download first. Install DuckDB to run it.
SELECT d.ad_number, d.status, d.subject, d.effective_date
FROM 'https://openairdocs.org/data/latest/faa_directive.parquet' d
WHERE d.ad_id IN (SELECT ad_id FROM 'https://openairdocs.org/data/latest/faa_engine_model_directive.parquet' WHERE engine_model_code IN ('41656'))
ORDER BY coalesce(d.effective_date, d.publication_date, d.issue_date) DESC, d.ad_number DESCRun it at the DuckDB prompt, or in any tool that reads Parquet over HTTPS. More ways to query the release are on Use the data.
Information bulletins that may apply · 6
Engine · Lycoming IO-540-C4D5
SAIB NE-19-08Reciprocating Engine Cylinder Section - Lycoming Engines Parallel Valve CylindersSAIB NE-08-32R1Propeller Governor Idler Gear Shaft Set ScrewSAIB NE-14-13Reciprocating Engine - Cylinder Mounting StudsSAIB NE-13-06Pushrod Shroud Spring Retainers, Engine Components Part No. AEL14995, for Lycoming Engines 320, 360, and 540 Series EnginesSAIB NE-09-04Fuel Control/Reciprocating EnginesSAIB NE-06-32R1Reciprocating Engine - CrankshaftHistorical bulletins · 1
Query with SQL
duckdb -csv -c "SELECT s.saib_number, any_value(s.title) AS title, max(s.issue_date) AS issue_date, any_value(s.status) AS status
FROM 'https://openairdocs.org/data/latest/faa_saib.parquet' s
WHERE s.saib_id IN (SELECT saib_id FROM 'https://openairdocs.org/data/latest/faa_engine_model_saib.parquet' WHERE engine_model_code IN ('41656'))
GROUP BY s.saib_number ORDER BY issue_date DESC"Prints the whole list as CSV. It reads the release’s Parquet files over HTTPS, so there’s nothing to download first. Install DuckDB to run it.
SELECT s.saib_number, any_value(s.title) AS title, max(s.issue_date) AS issue_date, any_value(s.status) AS status
FROM 'https://openairdocs.org/data/latest/faa_saib.parquet' s
WHERE s.saib_id IN (SELECT saib_id FROM 'https://openairdocs.org/data/latest/faa_engine_model_saib.parquet' WHERE engine_model_code IN ('41656'))
GROUP BY s.saib_number ORDER BY issue_date DESCRun it at the DuckDB prompt, or in any tool that reads Parquet over HTTPS. More ways to query the release are on Use the data.
Registered aircraft · 0
No aircraft currently registered with this engine model
NTSB investigations
No NTSB investigations matched to aircraft with this engine modelMatched through the registry by N-number, so foreign aircraft and some older cases aren’t counted.
FAA incident reports
No reports matched to aircraft with this engine modelMatched through the registry by N-number, so foreign aircraft and some older reports aren’t counted.
Service difficulty reports · 13
SDR 2017FA0000477Seal · wornOVER THE PAST YEAR, THE LANDING GEAR WOULD OCCASIONALLY NOT EXTEND, BUT THE LANDING GEAR MOTOR & PUMP CONTINUED RUNNING. EMERGENCY GEAR EXTENSIONS ALWAYS WORKED, AND GEAR RETRACTION ALWAYS WORKED. AFTER CONSIDERABLE INVESTIGATION IT WAS DISCOVERED THAT INTERSDR 2013FA0000720Thru Bolt · wrong partDURING THE COURSE OF AN INVESTIGATION INTO A FATAL ACCIDENT INVOLVING ACFT, AUSTRALIAN REGISTRATION, THE AUSTRALIAN TRANSPORT SAFETY BUREAU (ATSB) BECAME AWARE THAT THE ENGINE CONTAINED PARTS THAT WERE NOT APPROVED TO BE FITTED TO THE ENGINE TYPE. THE PARTS WESDR LC1R20120306005Plug · looseDURING RUN UP OF A NEWLY FACTORY REBUILT ENGINE, THE PROPELLER DID NOT CYCLE. IT WAS DISCOVERED THAT THE PLUG, BEHIND THE OIL SUPPLY TUBE HAD COME LOOSE AND WAS ALLOWING PRESSURIZED OIL FROM THE GOVERNOR TO FLOW BACK THROUGH THE CRANKSHAFT AND NOT ACTUATE THE SDR CA100805012Relay · burned(CAN) FLAP CIRCUIT BREAKER POP OUT, DURING TESTING FLAP OPERATION ON THE GROUND. DEFECT FOUND WAS BURNED CONTACT IN FLAP RELAY LOCATED UNDER ACFT BELLY RT SIDE.SDR 2007FA0000236Terminal · brokenFIELD WIRE TERMINAL END BROKEN AT ALTERNATOR TERMINAL LUG CAUSED FAILURE OF ALTERNATOR TO CHARGE BATTERY. (K)SDR 2005FA0000163Tappet · missingON ANNUAL 100 HR INSP, OIL STRAINER CLEANED, METAL PIECE FOUND IN STRAINER, METAL PIECE SENT TO MFG FOR ANALYSIS, REPORT INDICATED. PIECE FROM TAPPET BODY. CYCLE REDUCED, INSP OF TAPPPET BODIES, FOUND NIS INLET, BODY WITH PIECE MISSING FROM SURFACE, PROBABLESDR AUS20031164Spar · corroded(AUS) LT AND RT MAIN WING SPARS CORRODED ON REAR FACE. SPAR PN TB20-11-003-100 AND PN TB20-11-003-101.SDR AUS20030834Spar · corroded(AUS) LT WING MAIN SPAR WEB CORRODED IN AREA BEHIND RIB PN TB20.11.003.100 LOCATED AT WS 660.SDR AU001114Connector · broken(AUS) RT DOWNLOCK SWITCH CONNECTOR BROKEN AT THE BOTTOM OF THE ATTACHMENT NUT.SDR AU981142Pipe · leaking(AUS) LANDING GEAR EMERGENCY VALVE FORWARD PIPE LEAKING FLUID FROM A PIN HOLE IN A CURVED SECTION OF THE PIPE. LOSS OF HYDRAULIC FLUID. PART TC: 3,439.SDR AU980762Valve · worn(AUS) ENGINE OIL TEMPERATURE CONTROL VALVE FACE WORN EXCESSIVELY. FOUND DURING INSPECTION IAW AD/LYC/78. PART TOTAL CYCLES: 1,830.SDR AU980389Csu · damaged(AUS) PROPELLER CSU LEAKING OIL. INVESTIGATION FOUND THAT THE LOWER ENGINE COWL HAD WORN THROUGH THE CSU LOWER BODY.SDR AU960846Seal · deteriorated(AUS) RH MAIN LANDING GEAR ACTUATOR SEALS DETERIORATED AND LEAKING - CAUSED BY FAILURE TO CORRECTLY MASK LANDING GEAR RAM DURING PAINTING ALLOWING RAM SHAFT TO BE COVERED IN PAINT WHICH DAMAGED RAM SEALS - PERSONNEL/MAINTENANCE ERROR
Query with SQL
duckdb -csv -c "SELECT sdr_id, difficulty_date, n_number, aircraft_make, aircraft_model, part_name, part_condition, jasc_code, discrepancy FROM 'https://openairdocs.org/data/latest/faa_service_difficulty_report.parquet' WHERE engine_model_key = 'IO540C4D5' ORDER BY difficulty_date DESC"
Prints the whole list as CSV. It reads the release’s Parquet files over HTTPS, so there’s nothing to download first. Install DuckDB to run it.
SELECT sdr_id, difficulty_date, n_number, aircraft_make, aircraft_model, part_name, part_condition, jasc_code, discrepancy FROM 'https://openairdocs.org/data/latest/faa_service_difficulty_report.parquet' WHERE engine_model_key = 'IO540C4D5' ORDER BY difficulty_date DESC
Run it at the DuckDB prompt, or in any tool that reads Parquet over HTTPS. More ways to query the release are on Use the data.
STCs that may be installed · 42
Approved for this engine model: the STC’s model list names it on its data sheet, or a series that includes it. The registry doesn’t record which STCs an aircraft has.
STC SE04651CHTo allow use of l00R grade aviation fuel meeting Swift Fuel, LLC specification SPEC-l00R-22STC SE00825WIInstallation of Specialty Products Spin-on oil filter on Lycoming Engines.STC SE04349CHInstallation of SureFly electronic ignition
See all 42 STCsQuery with SQL
duckdb -csv -c "SELECT s.stc_number, s.description, s.holder, s.status, s.status_date, m.matched_model
FROM (
SELECT stc_number, min(matched_model) AS matched_model
FROM 'https://openairdocs.org/data/latest/faa_engine_model_stc.parquet'
WHERE engine_model_code IN ('41656')
GROUP BY stc_number
) m JOIN 'https://openairdocs.org/data/latest/faa_stc.parquet' s USING (stc_number)
ORDER BY s.status = 'Current' DESC, s.status_date DESC, s.stc_number"Prints the whole list as CSV. It reads the release’s Parquet files over HTTPS, so there’s nothing to download first. Install DuckDB to run it.
SELECT s.stc_number, s.description, s.holder, s.status, s.status_date, m.matched_model
FROM (
SELECT stc_number, min(matched_model) AS matched_model
FROM 'https://openairdocs.org/data/latest/faa_engine_model_stc.parquet'
WHERE engine_model_code IN ('41656')
GROUP BY stc_number
) m JOIN 'https://openairdocs.org/data/latest/faa_stc.parquet' s USING (stc_number)
ORDER BY s.status = 'Current' DESC, s.status_date DESC, s.stc_numberRun it at the DuckDB prompt, or in any tool that reads Parquet over HTTPS. More ways to query the release are on Use the data.