# N334WN: 1962 Williams Helicopter UH-1B - Status: Valid registration - Airframe: [Williams Helicopter UH-1B](https://openairdocs.org/model/williams-helicopter-uh-1b) (registry code 9790871, 15 seats) - Engine: [Lycoming T-53 series](https://openairdocs.org/engine/lycoming-t-53-series) (registry code 41552) - Data sheets: [TCDS H7SO](https://openairdocs.org/tcds/H7SO) (Overseas Aircraft Support Inc.) (OpenAirDocs) - Serial number: 62-2097 - Year built: 1962 - Type: Rotorcraft - Engine type: Turbo-shaft - Airworthiness: Restricted, agriculture and pest control - Airworthiness date: April 13, 2000 - Certificate issued: March 17, 2000 - Expires: October 31, 2029 - Mode S code: A3A6AC - Registered owners: [Pope Jim D DBA](https://openairdocs.org/faa-owner/POPE%20JIM%20D%20DBA), [Leading Edge Aviation](https://openairdocs.org/faa-owner/LEADING%20EDGE%20AVIATION) - Location: [Lewiston, ID](https://openairdocs.org/faa-place/ID/Lewiston) - Owner type: Individual - Owner's area on the map: 46.2517° N, 116.9250° W: Placed by OpenAirDocs at the center of ZIP code 83501, within about 9 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based - FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=334WN - Page: https://openairdocs.org/aircraft/N334WN From the FAA registry file of October 22, 2026. ADs below are matched by the registry's airframe and engine model codes. They may apply; each AD's applicability can narrow it by serial number, part number or installed equipment. This is not a compliance determination. The registry lists only the engine series, so ADs for every Lycoming T-53 model are included. ## ADs that may apply (OpenAirDocs): 42 in force ### Matched by airframe (Williams Helicopter UH-1B) - [AD 2024-19-17](https://openairdocs.org/ad/2024-19-17): Rotorcraft flight control · Airwolf Aerospace, LLC Tension-Torsion Strap Assemblies, P/N… (STC SR03408CH). Effective Oct 11, 2024 - [AD 2022-20-14](https://openairdocs.org/ad/2022-20-14): Main Rotor Gearbox · Bell Textron 204B, 205A, 205A-1 and 20 more. Effective Dec 27, 2022 - [AD 2022-22-12](https://openairdocs.org/ad/2022-22-12): Nose/Tail Landing Gear Structure/Axle · Replacement crosstubes P/N D212-664 (Dart Aerospace STC SR01298NY). Effective Nov 22, 2022 - [AD 2022-21-11](https://openairdocs.org/ad/2022-21-11): Main rotor blades · Bell Textron 204B, 205A, 205A-1 and 11 more. Effective Nov 16, 2022 - [AD 2022-05-10](https://openairdocs.org/ad/2022-05-10): Cabin Equipment/Furnishings · Airbus Helicopters AS332L, AS332L1, AS332L2 and 57 more. Effective Apr 20, 2022 - [AD 2022-06-05](https://openairdocs.org/ad/2022-06-05): Main Rotor System · WSH HH-1K, TH-1F, TH-1L and 11 more. Effective Mar 16, 2022 - [AD 2021-15-14](https://openairdocs.org/ad/2021-15-14): Rotorcraft Tail Boom · California Department of Forestry UH-1H, UH-1F, TH-1L and 39 more. Effective Aug 30, 2021 - [AD 2012-17-10](https://openairdocs.org/ad/2012-17-10): Main Rotor Blades · California Department of Forestry UH-1H, UH-1F, TH-1L and 36 more. Effective Sep 28, 2012 - [AD 2012-14-12](https://openairdocs.org/ad/2012-14-12): Tail Rotor Blades · California Department of Forestry UH-1H, UH-1F, TH-1L and 36 more. Effective Sep 4, 2012 - [AD 2010-14-12](https://openairdocs.org/ad/2010-14-12): Landing Gear System · Overseas Aircraft Support UH-1H, UH-1F, UH-1H and 40 more. Effective Jul 23, 2010 - [AD 2006-19-05](https://openairdocs.org/ad/2006-19-05): Tail rotor (T/R) slider · California Department of Forestry UH-1H, UH-1F, TH-1L and 36 more. Effective Oct 16, 2006 - [AD 2002-20-01](https://openairdocs.org/ad/2002-20-01): TT strap · Overseas Aircraft Support UH-1H, UH-1F, TH-1L and 34 more. Effective Nov 6, 2002 - [AD 2002-13-51](https://openairdocs.org/ad/2002-13-51): Tail Rotor (T/R) Grip · Overseas Aircraft Support UH-1H, UH-1F, TH-1L and 34 more. Effective Aug 19, 2002 - [AD 2002-01-31](https://openairdocs.org/ad/2002-01-31): Retirement Index Number (RIN) for Masts · Overseas Aircraft Support UH-1H, UH-1F, TH-1L and 36 more. Effective Mar 8, 2002 - [AD 2000-15-21 R1](https://openairdocs.org/ad/2000-15-21-R1): Main Rotor Mast Assemblies · Overseas Aircraft Support UH-1H, UH-1F, TH-1L and 33 more. Effective Nov 22, 2000 - [AD 99-25-12](https://openairdocs.org/ad/99-25-12): Tailboom Vertical Fin Spar · California Department of Forestry UH-1H, UH-1F, TH-1L and 31 more. Effective Jan 11, 2000 - [AD 99-07-15](https://openairdocs.org/ad/99-07-15): Tail Rotor Yoke · Arrow Falcon Exporters UH-1H, UH-1F, TH-1L and 33 more. Effective May 3, 1999 - [AD 97-01-06](https://openairdocs.org/ad/97-01-06): Tail Rotor Slider · Arrow Falcon Exporters UH-1H, UH-1F, TH-1L and 32 more. Effective Feb 13, 1997 - [AD 96-12-26](https://openairdocs.org/ad/96-12-26): Clean and Inspect Tail Rotor Blade · Arrow Falcon Exporters UH-1H, UH-1F, TH-1L and 36 more. Effective Sep 23, 1996 - [AD 95-10-08](https://openairdocs.org/ad/95-10-08): Tail Rotor Control System · Arrow Falcon Exporters UH-1H, UH-1F, TH-1L and 34 more. Effective May 26, 1995 - [AD 94-22-09](https://openairdocs.org/ad/94-22-09): Tail Rotor Driveshaft · Arrow Falcon Exporters UH-1H, UH-1F, TH-1L and 34 more. Effective Nov 22, 1994 - [AD 90-03-10](https://openairdocs.org/ad/90-03-10): Tail Rotor Grips · Arrow Falcon Exporters UH-1H, UH-1F, 204B and 33 more. Effective Oct 18, 1991 - [AD 90-10-05](https://openairdocs.org/ad/90-10-05): Tail Rotor Gearbox · Bell Helicopter Textron TH-1L, UH-1E, UH-1L and 17 more. Effective Jun 5, 1990 - [AD 89-08-06](https://openairdocs.org/ad/89-08-06): Transmission Internal Sump Oil Filter · AST UH-1F, TH-1L, UH-1E and 22 more. Effective Feb 7, 1990 - [AD 88-25-05](https://openairdocs.org/ad/88-25-05): Tail Rotor Grip Assembly · AST UH-1F, 204B, 205A and 25 more. Effective Dec 13, 1988 ### Matched by engine (Lycoming T-53 series) - [AD 2022-10-02](https://openairdocs.org/ad/2022-10-02): Engine Controls · Honeywell International T53-L-703, T53-L-13B S/SB, T53-L-13B S/SA and 14 more. Effective Jun 28, 2022 - [AD 2009-15-13](https://openairdocs.org/ad/2009-15-13): Combustion chamber housings (CCHs) · Honeywell International T5313B, T5317A, T5317A-1 and 2 more. Effective Aug 25, 2009 - [AD 2006-11-16](https://openairdocs.org/ad/2006-11-16): Fuel control regulator assemblies · Honeywell International T53-L-703, T53-L-13B/D, T53-L-13B and 8 more. Effective Jul 5, 2006 - [AD 2006-01-05](https://openairdocs.org/ad/2006-01-05): Turboshaft engine · Honeywell International T53-L-703, T53-L-13B/D, T53-L-13B S/SB and 12 more. Effective Feb 16, 2006 - [AD 2002-15-04](https://openairdocs.org/ad/2002-15-04): Compressor impellers · Honeywell International T53-L-703, T53-L-13B/D, T53-L-13B and 4 more. Effective Sep 10, 2002 - [AD 2002-09-09](https://openairdocs.org/ad/2002-09-09): Centrifugal Compressor Impeller · Honeywell International T53-L-703, T53-L-13B/D, T53-L-13B and 10 more. Effective Jun 13, 2002 - [AD 97-21-07 R1](https://openairdocs.org/ad/97-21-07-R1): Accessory Drive Carrier Assembly · Honeywell International T53-L-703, T5313B, T5317A and 1 more. Effective Jul 6, 1998 - [AD 97-07-05](https://openairdocs.org/ad/97-07-05): Accessory Drive Assembly · Honeywell International T53-L-703, T5311A, T5311B and 4 more. Effective Jun 24, 1997 - [AD 96-17-01](https://openairdocs.org/ad/96-17-01): Suspect second stage power turbine disks · Honeywell International T5313B. Effective Sep 9, 1996 - [AD 95-10-04](https://openairdocs.org/ad/95-10-04): Centrifugal Compressor Impeller · Honeywell International T5313B, T5317A, T5317A-1 and 1 more. Effective May 25, 1995 - [AD 77-17-08](https://openairdocs.org/ad/77-17-08): Fuel Regulator P1 Multiplier Lever · Honeywell International T53-L-703, T5307A, T5309A and 7 more. Effective Mar 30, 1978 - [AD 75-22-02](https://openairdocs.org/ad/75-22-02): Secondary Failure N2 Accessory Drive Shaft · Honeywell International T5307A, T5309A, T5309B and 6 more. Effective Oct 29, 1975 - [AD 75-12-12](https://openairdocs.org/ad/75-12-12): Second Stage Gas Producer Cylinder Retaining Bolt · Honeywell International T5313A and T5313B. Effective Jun 18, 1975 - [AD 75-01-05](https://openairdocs.org/ad/75-01-05): Compressor Impeller Assembly Vane · Honeywell International T5313B. Effective Jan 17, 1975 - [AD 74-22-07](https://openairdocs.org/ad/74-22-07): Compressor Rotor Disks · Honeywell International T5313A. Effective Oct 31, 1974 - [AD 74-09-03](https://openairdocs.org/ad/74-09-03): Compressor Rotor Discs · Honeywell International T5309C, T5311A and T5311B. Effective May 2, 1974 - [AD 71-08-06](https://openairdocs.org/ad/71-08-06): Overspeed Pickup Housing Assembly · Honeywell International T5313A and T5313B. Effective Apr 16, 1971 ### Historical (superseded or no longer in force) - [AD 2021-15-52](https://openairdocs.org/ad/2021-15-52) (historical): Main Rotor System · Arrow Falcon Exporters UH-1H, UH-1F, TH-1L and 39 more. Effective Aug 13, 2021 - [AD 2000-22-51](https://openairdocs.org/ad/2000-22-51) (historical): Main Rotor Mast or Trunnion · Arrow Falcon Exporters UH-1H, UH-1F, HH-1K and 33 more. Effective Dec 26, 2000 - [AD 2000-08-53](https://openairdocs.org/ad/2000-08-53) (historical): Main Rotor System · AST UH-1F, HH-1K, TH-1F and 32 more - [AD 97-20-09](https://openairdocs.org/ad/97-20-09) (historical): Vertical fin spar · Arrow Falcon Exporters UH-1H, UH-1F, UH-1F and 33 more. Effective May 28, 1998 - [AD 97-20-09 PL](https://openairdocs.org/ad/97-20-09-PL) (historical): Tailboom Vertical Fin Spar · California Department of Forestry UH-1F, UH-1F, TH-1F and 31 more - [AD 89-17-03](https://openairdocs.org/ad/89-17-03) (historical): Main Rotor Masts · California Department of Forestry UH-1F, TH-1L, UH-1B and 18 more. Effective Sep 5, 1989 - [AD 2002-03-01](https://openairdocs.org/ad/2002-03-01) (historical): Reduction Gearbox Assembly · Honeywell International T5311A, T5311B, T5313B and 2 more. Effective Mar 21, 2002 - [AD 98-22-11](https://openairdocs.org/ad/98-22-11) (historical): Fuel Pumps · Honeywell International T5317A-1. Effective Dec 18, 1998 - [AD 87-12-05](https://openairdocs.org/ad/87-12-05) (historical): Gas Producer Turbine and Power Turbine Disks · Honeywell International T5313B. Effective Jul 20, 1987 ## Information bulletins (advisory) (3 in force) - [SAIB SW-12-38](https://openairdocs.org/saib/SW-12-38): Emergency Push Out Window Retention. Issued Jul 30, 2012 - [SAIB SW-06-64](https://openairdocs.org/saib/SW-06-64): . Issued Aug 17, 2006 - [SAIB SW-05-37](https://openairdocs.org/saib/SW-05-37): . Issued Mar 17, 2005 ## NTSB investigations (1) From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. - [NTSB SEA05CA086](https://openairdocs.org/ntsb/SEA05CA086), Apr 25, 2005: Williams Helicopter UH-1B (N334WN), Uniontown, WA, substantial damage. Probable cause: The pilot's failure to maintain clearance from an object while maneuvering, which resulted in the main rotor blades striking a power pole. The power pole was a factor in the accident. ## FAA accident and incident reports (1) From the FAA Accident/Incident Data System. Reports are matched to registry aircraft by N-number and event date, checked against the reported make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. - [Accident 20050425035029A](https://openairdocs.org/incident/20050425035029A), Apr 25, 2005: Bell UH1B (N334WN), Uniontown, WA, Destroyed. (-23) N334WN, a 1962 williams WH-UH1B helicopter was destroyed in a FAR part 137 aerial application accident. This aircraft was operated by leading edge… ## Service difficulty reports None filed for this aircraft. Matched to this aircraft by N-number and event date, checked against the reported serial number, make and model. ## STCs that may be installed (OpenAirDocs) (18) Approved for this aircraft's airframe or engine model, in force first, then newest. The registry doesn't record which STCs an aircraft has; its records do. ### Approved for the airframe (Williams Helicopter UH-1B) - [STC SR12332SE](https://openairdocs.org/stc/SR12332SE): Installation of Mechanical Specialties, LLC Human External Cargo (HEC) and non-HEC Hook System. Mechanical Specialties, LLC - [STC SH3744NM](https://openairdocs.org/stc/SH3744NM): Dual Battery Installation. WSH, LLC - [STC SR00026DE](https://openairdocs.org/stc/SR00026DE): Installation of tailboom 24 inch plug extension, commercial style main rotor blades, and rotorhead. Midwest Aerospace TC LLC - [STC SR00073DE](https://openairdocs.org/stc/SR00073DE): Replacement of Lycoming T53-L-13 series powerplant. Midwest Aerospace TC LLC - [STC SR02761LA](https://openairdocs.org/stc/SR02761LA): Installation of UH-1H composite main rotor blades on the UH-1B helicopters. Northern X-Treme Helicopters - [STC SR02492LA](https://openairdocs.org/stc/SR02492LA): Installation of a Helicopter Technology Company main rotor blade assembly. Helicopter Technology Co - [STC SR03408CH](https://openairdocs.org/stc/SR03408CH): Install Airwolf Aerospace, LLC Tension-Torsion Strap Assemblies, P/N AA-204-310-101-101 or AA-204-310-101-103. Airwolf Aerospace LLC - [STC SR02413LA](https://openairdocs.org/stc/SR02413LA): Installation of an AKV, Inc Exceedence and Trend Monitoring System kit P/N ETM1000. AKV Inc - [STC ST04270AT](https://openairdocs.org/stc/ST04270AT): Install the VTOL ASSALT V3 Windscreen Laminate Kit. VTOL LLC - [STC SR01742NY](https://openairdocs.org/stc/SR01742NY): Installation of extended height landing gear. Dart Aerospace Limited - [STC SR02051LA](https://openairdocs.org/stc/SR02051LA): Installation of a VAn Horn Aviation Tail Rotor Blade. Van Horn Aviation LLC - [STC SR02204LA](https://openairdocs.org/stc/SR02204LA): Installation of an AKV, INC. N1/N2 Cycle Counter, PN UH1T53CC. AKV Inc - [STC SR01298NY](https://openairdocs.org/stc/SR01298NY): Installation of replacement crosstubes P/N D212-664. Dart Aerospace Limited - [STC SR00563NY](https://openairdocs.org/stc/SR00563NY): Installation of Skidtubes and associated saddles. Dart Aerospace Limited ### Approved for the engine (Lycoming T-53 series) - [STC SE00585AT](https://openairdocs.org/stc/SE00585AT): Installation of Aeronautical Accessories, Inc. PC Safety Valve Kit. Bell Helicopter Textron Inc. Lists T5313B - [STC SE00028EN](https://openairdocs.org/stc/SE00028EN): Installation of Pratt & Whitney Engine Services Inc. SmartCycle Plus Engine Monitoring System, P/N EMU-K-010-1 on specified T53 engine models. Pratt & Whitney Engine Services Inc. Lists T5309A - [STC SE00029EN](https://openairdocs.org/stc/SE00029EN): Installation of Pratt & Whitney Engine Services Inc. SmartCycle Plus Engine Monitoring System, P/N EMU-K-010-1 on specific T53 engine models. Pratt & Whitney Engine Services Inc. Lists T5313B - [STC SE01440NY](https://openairdocs.org/stc/SE01440NY): Conversion of Honeywell engine model T5313B to Honeywell engine model T5317A utilizing Aero Design, Ltd. conversion instructions C1437.02 dtd 4/30/01. Dart Aerospace Limited. Lists T5313B ## Related - Other Williams Helicopter UH-1B aircraft: https://openairdocs.org/model/williams-helicopter-uh-1b/aircraft.md - The Lycoming T-53 series engine: https://openairdocs.org/engine/lycoming-t-53-series.md --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.