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Williams Helicopter Corp/Oas UH-1E

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Aircraft model · Rotorcraft · Rotorcraft · registry code 9790975

Manufacturer (registry)
WILLIAMS HELICOPTER CORP/OAS
Model
UH-1E
Registry code
9790975
Registered
1 aircraft
Type
Rotorcraft
Engines
1 · Turbo-shaft
Seats
6
Weight class
Up to 12,499 lb
Certification
Type certificated
Data sheet
TCDSH7SO
Holder
Overseas Aircraft Support Inc.

Model codes come from the FAA registry’s reference file. ADs are matched to them by model name and maker.

On this page

Airworthiness directives that may apply · 25

ADs whose products match this airframe model. Each AD’s applicability may narrow it by serial number, part number or configuration.

1988In forceSuperseded2026
See all 31 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 ('9790975'))
  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.

Information bulletins that may apply · 2

Airframe · Williams Helicopter Corp/Oas UH-1E

SAIB SW-06-64Issued Aug 17, 2006SAIB SW-05-37Issued Mar 17, 2005
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 ('9790975'))
  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.

Registered aircraft · 1

N155TLTwo Roan Ranch LLC · Salem, ORBuilt 1967 · S/N 154779
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 ('9790975')
  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.

NTSB investigations

No NTSB investigations matched to aircraft with this 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 of this modelMatched through the registry by N-number, so foreign aircraft and some older reports aren’t counted.

Service difficulty reports · 2

SDR QJ5R20017Spar · misinstalledDURING MODIFICATION OF THE TAIL BOOM VERTICAL FIN SPAR USING SPAR KIT, THE INSTALLER IMPROPERLY INSTALLED THE HI LOC FASTNERS WHERE THE 90 DEGREE GEARBOX CASTING ATTACHES TO SIDE RAILS OF SPAR CAPS. OPPOSITE OF STC INSTALLATION INSTRUCTIONS, THE HI LOC COLLARJul 16, 2001 · N137US · Bell UH1E · Rotorcraft Tail BoomSDR 97ZZZX4014Stabilizer Bar · bolt failedON A DAILY INSPECTION OF THE HELICOPTER, 2 BOLT HEADS WERE POPPED OFF THE STABILIZER BAR MOUNTING AREA AND ALL OTHER BOLTS WERE LOOSE. RECORDS INDICATED 110 HRS AGO, ONE BOLT WAS FOUND LOOSE ON A PREVIOUS INSPECTION. SUBMITTER RECOMMENDS THE AN 6H BOLTS AND May 20, 1997 · N121FC · Bell UH1E · Horizontal Stabilizer Structure
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 = 'UH1E'
  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.

STCs that may be installed · 14

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 SystemMechanical Specialties, LLCSTC SR00119DEInstallation of an upgraded 42 degree Tail Rotor gearbox, P/N 212-040-003, and Control CablesMidwest Aerospace TC LLCSTC SR09177RCModification of the vertical fin sparMidwest Aerospace TC LLCSTC SH5690NMInstallation of Advanced Technology Aircraft Co. engine barrier filter.WSH, LLCSTC SR03408CHInstall Airwolf Aerospace, LLC Tension-Torsion Strap Assemblies, P/N AA-204-310-101-101 or AA-204-310-101-103Airwolf Aerospace LLCSTC SR02413LAInstallation of an AKV, Inc Exceedence and Trend Monitoring System kit P/N ETM1000AKV Inc.STC ST04270ATInstall the VTOL ASSALT V3 Windscreen Laminate KitVTOL LLCSTC SR01742NYInstallation of extended height landing gear.Dart Aerospace LimitedSTC 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.Global Spar LLCSTC SR02204LAInstallation of an AKV, INC. N1/N2 Cycle Counter, PN UH1T53CCAKV Inc.STC SR00103SEInstallation of Aviation Development Corporation oil filterAviation Development CorporationSTC SR01298NYInstallation of replacement crosstubes P/N D212-664.Dart Aerospace LimitedSTC SR00563NYInstallation of Skidtubes and associated saddlesDart Aerospace LimitedSTC SR00332NYInstallation of Avionics Specialties power analyzer and recorder no. SL17009 and SL17061.Aerosonic Corporation
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 ('9790975')
    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.

PMA parts · 19

Current parts manufacturer approvals (PMA): parts the FAA has approved companies to make as replacements or modifications. Each record lists its models as free text; OpenAirDocs matched them to this model on its data sheet, so check the FAA record before relying on it. Newest first.

650-430-100-100MECHANICAL SPECIALTIES, LLC MODEL 650-430-100-100ADVANCED DUEL EXTERNAL CARGO HOOK /ADEC™HOOK SYSTEMMechanical Specialties LLC · PMA PQ2180NM · Modification part · Apr 29, 2026No part numberAviation Devices & Electronic Components LLC (Av-DEC) · PMA PQ3846SW · May 10, 2022No part numberAviation Devices & Electronic Components LLC (Av-DEC) · PMA PQ3846SW · Apr 18, 2022
See all 19 PMA parts
Query with SQL
duckdb -csv -c "SELECT drs_guid, part_number, part_name, holder, pma_number, replaces_part, supplement_date, tcds_models
  FROM 'https://openairdocs.org/data/latest/faa_type_certificate_pma.parquet'
  WHERE tcds_number IN ('H7SO')
    AND len(list_intersect(tcds_models, ['UH-1E'])) > 0
  ORDER BY supplement_date DESC, drs_guid 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.

The same model under other registry codes

Amateur-built copies and renamed makers get their own codes.

Bell UH-1E6 registered aircraftRegistry code 118141H
Query with SQL
duckdb -csv -c "SELECT m.code, m.manufacturer, m.model, count(g.n_number) AS aircraft
  FROM 'https://openairdocs.org/data/latest/faa_aircraft_model.parquet' m LEFT JOIN 'https://openairdocs.org/data/latest/faa_aircraft_registration.parquet' g ON g.aircraft_model_code = m.code
  WHERE m.match_key = 'UH1E' AND m.code NOT IN ('9790975')
  GROUP BY ALL
  ORDER BY aircraft DESC
  LIMIT 12"

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.