- Manufacturer (registry)
- LYCOMING
- Model
- IO-720-B1B
- Registry code
- 41951
- Installed in
- 0 registered aircraft
- Type
- Reciprocating
- Power
- 400 hp
- Data sheet
- TCDS1E15
- Holder
- Textron Lycoming Subsidiary of Textron Inc.
Model codes come from the FAA registry’s reference file.
On this page
Airworthiness directives that may apply · 15
ADs whose products match this engine model. Each AD’s applicability may narrow it by serial number, part number or configuration.
| 1975 | 1 |
|---|---|
| 1977 | 1 |
| 1978 | 1 |
| 1979 | 1 |
| 1992 | 1 |
| 1995 | 1 |
| 1997 | 1 |
| 1998 | 2 |
| 2003 | 2 |
| 2004 | 1 |
| 2008 | 1 |
| 2010 | 1 |
| 2011 | 1 |
| 2012 | 2 |
| 2015 | 1 |
| 2022 | 1 |
| 2026 | 1 |
Engine · Lycoming IO-720-B1B
AD 2026-04-11Engine (Reciprocating)AD 2022-16-03Engine (RECIPROCATING)AD 2015-19-07Fuel injector fuel linesQuery 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 ('41951'))
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 ('41951'))
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 · 1
Engine · Lycoming IO-720-B1B
SAIB NE-08-32R1Propeller Governor Idler Gear Shaft Set ScrewQuery 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 ('41951'))
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 ('41951'))
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 · 10
SDR CA110908005Hose · ruptured(CAN) PILOT NOTICED LOW FUEL PRESSURE AND POWER LOSS ON NR2 ENGINE DURING CLIMBOUT. PILOT SELECTED FUEL BOOST PUMP "ON" WITH NO IMPROVEMENT IN PERFORMANCE OR INCREASE IN FUEL PRESSURE. PILOT ELECTED TO RETURN TO BASE. ACFT LANDED AND TAXIED TO HANGAR WITHOUTSDR CA091020006Line · ruptured(CAN) PILOT DECLARED EMERGENCY UPON DISCOVERING HYD SYS FAILURE AND LANDED. AFTER LANDING, THE PILOT HAD NO CONTROL OF NOSE WHEEL STEERING OR BRAKES AND ACFT VEERED OFF THE RUNWAY TO RT, ONTO GRASS AND A DITCH. THE RT MLG BROKE OFF CAUSING CONSIDERABLE DAMAGE SDR CA090819007Rivet · corrodedACFT IS HANGARED. ACFT WAS NOTED TO HAVE MISSING RIVET (HEAD) AT LT WS 24-54. LWR SPAR CAP AREA. TCAC WAS CONTACTED AND WE WERE ADVISED TO REPLACE RIVETS AND INSPECT THE AREA IAW TCAC SB 208A. ULTRASONIC INSP WAS COMPLETED BETWEEN WS 24 - WS 52. AVERAGE FLSDR AUS20031061Ignition Lead · faulty(AUS) RT ENGINE NR 7 CYLINDER LOWER IGNITION LEAD DEFECTIVE AT SPARK PLUG END.SDR AUS20030973Pin · cracked(AUS) LT AND RT MAIN LANDING GEAR ACTUATOR CLEVIS PINS CRACKED.SDR AUS20011373Bearing · delaminated(AUS) ENGINE NO1 MAIN BEARING DELAMINATED. METAL CONTAMINATION OF OIL FILTER.SDR AU000424Cooler · cracked(AUS) RIGHT ENGINE OIL COOLER LEAKING FROM PREVIOUS WELD REPAIR.SDR AU971386Blade · cracked(AUS) PROPELLER BLADE CRACKED. CRACK ORIGINATED FROM A NICK IN THE BLADE LOCATED APPROXIMATELY 76.2MM (3IN) FROM THE BLADE TIP.CRACK LENGTH 12.7MM (0.5IN). SUSPECT THE CRACK WAS INITIATED BY A PIECE OF METAL WIRE WHICH WAS FOUND IN THE BLADE DURING DRESSING OUSDR AU960147Gasket · leaking(AUS) ENGINE DRIVEN FUEL PUMP RELIEF VALVE GASKET LEAKINGSDR 95ZZZX6763Injector Line · chafedREF TEXTRON SB 342B ISSUED 10-22-93, PAGE 32. CLAMP NR 47, CYL NR 3, RT ENG, FOUND INJECTOR LINE AND IGNITION LEAD BOTH DEEPLY SCORED UNDER CLAMP. SUSPECT CAUSE, INEFFECTIVE CLAMPING ACTION OF CLAMP, PN 71829, WHEN USED WITH SLEEVE TO CLAMP LEAD AND INJECTOR
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 = 'IO720B1B' 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 = 'IO720B1B' 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 · 25
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 SE00825WIInstallation of Specialty Products Spin-on oil filter on Lycoming Engines.STC SE02352CHInstallation of Challenger cleanable oil filter assemblySTC SE00939WIInstallation of B&C Specialty Products Model BC 315-( ) Starter on Lycoming engines.
See all 25 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 ('41951')
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 ('41951')
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.