- Manufacturer (registry)
- BELL
- Model
- UH-1L
- Registry code
- 1181401
- Registered
- 1 aircraft
- Type
- Rotorcraft
- Engines
- 1 · Turbo-shaft
- Seats
- 6
- Weight class
- Up to 12,499 lb
- Certification
- Type certificated
- Data sheet
- TCDSH4NM
- Holder
- Bell Textron Inc.
Model codes come from the FAA registry’s reference file. ADs are matched to them by model name and maker.
On this page
Aircraft by year built · 8
| 1965 | 2 |
|---|---|
| 1967 | 1 |
| 1968 | 1 |
| 1969 | 2 |
| 1988 | 2 |
Airworthiness directives that may apply · 29
ADs whose products match this airframe model. Each AD’s applicability may narrow it by serial number, part number or configuration.
| 1980 | 1 |
|---|---|
| 1988 | 2 |
| 1990 | 2 |
| 1991 | 1 |
| 1994 | 1 |
| 1995 | 1 |
| 1996 | 1 |
| 1997 | 1 |
| 1999 | 1 |
| 2000 | 2 |
| 2002 | 3 |
| 2006 | 1 |
| 2012 | 2 |
| 2013 | 2 |
| 2014 | 1 |
| 2021 | 3 |
| 2022 | 5 |
| 2023 | 1 |
| 2024 | 1 |
See all 32 ADs
Query 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_aircraft_model_directive.parquet' WHERE aircraft_model_code IN ('1181401'))
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_aircraft_model_directive.parquet' WHERE aircraft_model_code IN ('1181401'))
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 · 3
Historical 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_aircraft_model_saib.parquet' WHERE aircraft_model_code IN ('1181401'))
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_aircraft_model_saib.parquet' WHERE aircraft_model_code IN ('1181401'))
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 · 1
Query with SQL
duckdb -csv -c "SELECT n_number, serial_number, year_manufactured, status, registrant_name, registrant_city, registrant_state
FROM 'https://openairdocs.org/data/latest/faa_aircraft_registration.parquet'
WHERE aircraft_model_code IN ('1181401')
ORDER BY n_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 n_number, serial_number, year_manufactured, status, registrant_name, registrant_city, registrant_state
FROM 'https://openairdocs.org/data/latest/faa_aircraft_registration.parquet'
WHERE aircraft_model_code IN ('1181401')
ORDER BY n_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.
NTSB investigations · 9
Aircraft matched to this model through the registry, by N-number and event date, checked against the reported serial number, make and model.
Of 9 cases with NTSB’s older coding, defined in its coding manual.
NTSB FTW98LA405Accident · Minor injuriesLimited investigationFinal reportBell UH-1L · Price, UTThe pilot's inadvertent loss of tail rotor effectiveness. Factors were the high density altitude flight conditions, the unfavorable wind condition, and the none suitable terrain for an autorotation.NTSB SEA95LA221Accident · Serious injuriesLimited investigationFinal reportBell UH-1L · Grace, IDthe fatigue failure of the centrifugal impeller and the lack of suitable terrain for a forced landing. Factors contributing to the accident were: the lack of required compliance with the FAA Airworthiness Directive by the operator, the insufficiently defined…NTSB LAX95LA030Accident · Minor injuriesLimited investigationFinal reportBell UH-1E · Willits, CAthat the pilot misjudged the distance between the helicopter and the trees.NTSB LAX94LA208Accident · No injuriesLimited investigationFinal reportBell UH-1L · Pleasant Grove, CAthe pilot's failure to see and avoid the power lines due to sun glare from the rising sun at dawn.NTSB LAX90DUJ05Accident · No injuriesFinal reportBell UH-1E · Mesa, AZThe inflight separation of the tail rotor due to improper maintenance procedures and the installation of incorrect attachment hardware on the tail rotor blade pitch change linkages.NTSB SEA89FA111Accident · Serious injuriesField investigationFinal reportOregon Helicopters UH-1L · Baring, WAFatigue failure of the tail rotor 42 degree gear box due to pilot induced overstress. Navy data and FAA type certificate limitations were not adhered to.NTSB ATL89FA130Accident · Serious injuriesField investigationFinal reportBell UH-1E · Aiken, SCImproper installation of a tail rotor pitch change crosshead retention bolt by the company mechanic, which resulted in loosening of the bolt and eventual failure of the tail rotor assembly/blade and subsequent loss of control. Trees at the crash site…NTSB SEA88LA143Accident · Minor injuriesLimited investigationFinal reportBell UH-1E · North Bend, ORDrg a logging opn, the plt noted an apparent transmission malfunction. An autorotative landing was made on unprepared terrain & the helicopter was damaged. An investigation revealed the tail rotor drive input gear in the 42 deg gearbox had failed from…NTSB SEA86FA137Accident · 1 fatalField investigationFinal reportBell UH-1L · Wenatchee, WAN4964N, a Bell UH-1L, was being operated in logging ops by an experienced, military trained plt who possessed 6000 hrs of flt experience in model. While lifting a sling load gnd crew rptd smoke from the tail rotor area. Plt released sling load & acknowledged…
Query with SQL
duckdb -csv -c "SELECT c.\"ntsbNumber\", c.\"eventDate\", c.\"eventType\", c.\"eventCity\", c.\"eventStateOrRegion\", a.n_number, a.\"aircraftMake\", a.\"aircraftModel\", c.\"highestInjuryLevel\", c.\"totalFatal\", c.\"completionStatus\", c.report_url
FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' a JOIN 'https://openairdocs.org/data/latest/ntsb_case_detail.parquet' c ON c.\"mKey\" = a.case_mkey
WHERE a.aircraft_model_code IN ('1181401')
ORDER BY c.\"eventDate\" DESC, c.\"ntsbNumber\" 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 c."ntsbNumber", c."eventDate", c."eventType", c."eventCity", c."eventStateOrRegion", a.n_number, a."aircraftMake", a."aircraftModel", c."highestInjuryLevel", c."totalFatal", c."completionStatus", c.report_url
FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' a JOIN 'https://openairdocs.org/data/latest/ntsb_case_detail.parquet' c ON c."mKey" = a.case_mkey
WHERE a.aircraft_model_code IN ('1181401')
ORDER BY c."eventDate" DESC, c."ntsbNumber" 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.
FAA incident reports · 12
Matched to this model through the registry, by N-number and event date, checked against the reported make and model.
Accident 19980919025679ABell UH1L · Price, UT(.19) On September 19, 1998, approximately 1530 mountain daylight time, a Bell UH-1L, N5107J, was substantially damaged following impact with terrain after the loss of control near helper, Utah. The commercial pilot, the sole occupant of the helicopter,…Accident 19950918029149ABell UH1L · Grace, IDExplosion and flames from tailpipe while lifting logs. Dropped load. Autorotated to hard landing. Impeller ejected.Accident 19941031048179ABell UH1E · Willits, CADropped log. Began climbout. Tailrotor gear box hit a tree. Autorotated to hard landing.Accident 19940502010429ABell UH1E · Pleasant Grove, CAFlew into power lines on a spray run lost control. Rolled on ground impact. Blamed rising sun obscured powerline.Incident 19900906038789IBell UH1E · Windham, MEEngine failure inflight. Emergency autorotation into a lightly wooded area.Accident 19891104044199ABell UH1E · Mesa, AZTail rotor pitch change bolt failed and rotor assembly tore off. Crashed in uncontrolled turn and rolled over.Incident 19890916056689IBell UH1E · Gilbert, AZMalfunction in helicopters collective system. Forced landing. A loose collective hydraulic servo fell off mount.Accident 19890614015569ABell UH1L · Baring, WAVibration. Dropped load, hovered prior landing. Began right spin autorotated and crashed. Tail rotor gears strippedAccident 19890417008259ABell UH1E · Aiken, SCTail rotor 90 degrees gear box and tail rotor separated at low altitude. Control lost hit trees.Accident 19880804039629ABell UH1E · North Bend, ORAutorotated into rough terrain after apparent power malfunction. Tail rotor gearbox case ruptured due fatigue.Incident 19880803039359IBell UH1L · Skykomish, WAPilot lost control of helicopter when the tail rotor system failed. Found a faulty worn gear in tail rotor gear boxAccident 19860531019929ABell UH1M · Wenatchee, WAThe helicopter impacted trees after losing control. Corrosion in the 42 degree gearbox caused metal fatigue.
Query with SQL
duckdb -csv -c "SELECT report_number, event_date, event_type, city, state, aircraft_make, aircraft_model, aircraft_damage, fatal_injuries, n_number
FROM 'https://openairdocs.org/data/latest/faa_incident_report.parquet'
WHERE aircraft_model_code IN ('1181401')
ORDER BY event_date DESC, report_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 report_number, event_date, event_type, city, state, aircraft_make, aircraft_model, aircraft_damage, fatal_injuries, n_number
FROM 'https://openairdocs.org/data/latest/faa_incident_report.parquet'
WHERE aircraft_model_code IN ('1181401')
ORDER BY event_date DESC, report_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.
Service difficulty reports · 2
SDR 20010613CW024Spar · crackedFATIGUE CRACK OCCURRED ON RIGHT HAND VERTICAL FIN SPAR MEMBER APPROXIMATELY .5 INCH FORWARD OF THE 90 DEGREE GEARBOX ATTACH FITTING. THIS CRACK WAS DETECTED DURING COMPLIANCE OF AD. PROBABLE CAUSE: FATIGUE. REMOVED AND REPLACED VERTICAL FIN SPAR ASSEMBLY IASDR 95ZZZX6242Impeller · failedDURING ENGINE OPERATION, CENTRIFUGAL COMPRESSOR IMPELLER FAILED CAUSING UNCONTAINED PARTS EXITING FROM ENGINE COMPRESSOR SPOOL CORE DURING FLIGHT. THIS UNCONTAINED FAILURE RESULTED IN POWERPLANT POWER SHUT DOWN WITH RESULTANT HARD LANDING OF AIRCRAFT. RECOMM
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 aircraft_model_key = 'UH1L' 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 aircraft_model_key = 'UH1L' 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 · 11
Approved for this 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 SR12332SEInstallation of Mechanical Specialties, LLC Human External Cargo (HEC) and non-HEC Hook SystemSTC SR00119DEInstallation of an upgraded 42 degree Tail Rotor gearbox, P/N 212-040-003, and Control CablesSTC SR09177RCModification of the vertical fin sparSTC SR02596SEInstallation of Olympic Aero Services, Inc. Additional Telemetry Unit (ATU)STC SR03408CHInstall Airwolf Aerospace, LLC Tension-Torsion Strap Assemblies, P/N AA-204-310-101-101 or AA-204-310-101-103STC SR02413LAInstallation of an AKV, Inc Exceedence and Trend Monitoring System kit P/N ETM1000STC ST04270ATInstall the VTOL ASSALT V3 Windscreen Laminate KitSTC SR09316RCFabrication, modification, and installation of a new vertical fin spar in accordance with Global Helicopter Technology, Inc., Drawing number VTF-030-801, Revision B, dated April 5, 2001, or later FAA approved revision.STC SR01298NYInstallation of replacement crosstubes P/N D212-664.STC SR00563NYInstallation of Skidtubes and associated saddlesSTC SR00332NYInstallation of Avionics Specialties power analyzer and recorder no. SL17009 and SL17061.
Query 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_aircraft_model_stc.parquet'
WHERE aircraft_model_code IN ('1181401')
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_aircraft_model_stc.parquet'
WHERE aircraft_model_code IN ('1181401')
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.