# N911KK: 1966 Bell UH-1E - Status: Valid registration - Airframe: [Bell UH-1E](https://openairdocs.org/model/bell-uh-1e) (registry code 118141H, 6 seats) - Engine: [Lycoming T53-L-11D](https://openairdocs.org/engine/lycoming-t53-l-11d) (registry code 41574) - Data sheets: [TCDS H4NM](https://openairdocs.org/tcds/H4NM) (Bell Textron Inc.) (OpenAirDocs) - Serial number: 153762 - Year built: 1966 - Type: Rotorcraft - Engine type: Turbo-shaft - Airworthiness: Experimental, exhibition - Airworthiness date: November 13, 2006 - Certificate issued: December 30, 2022 - Expires: December 31, 2029 - Mode S code: AC9B4D - Registered owner: [Collings Foundation](https://openairdocs.org/faa-owner/COLLINGS%20FOUNDATION) - Location: [Stow, MA](https://openairdocs.org/faa-place/MA/Stow) - Owner type: Corporation - Owner's area on the map: 42.4299° N, 71.5116° W: Placed by OpenAirDocs at the center of ZIP code 01775, within about 2 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based - FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=911KK - Page: https://openairdocs.org/aircraft/N911KK From the FAA registry file of October 24, 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. ## ADs that may apply (OpenAirDocs): 29 in force ### Matched by airframe (Bell UH-1E) - [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 2023-11-07](https://openairdocs.org/ad/2023-11-07): Ground Proximity System · Airbus Helicopters 47, 206, 210 and 237 more. Effective Jun 22, 2023 - [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 2014-03-10](https://openairdocs.org/ad/2014-03-10): Tail Rotor Control System · JJASPP Engineering Services UH-1H, UH-1F, TH-1L and 35 more. Effective Mar 26, 2014 - [AD 2013-13-06](https://openairdocs.org/ad/2013-13-06): Main rotor head · California Department of Forestry UH-1H, UH-1F, TH-1L and 36 more. Effective Sep 10, 2013 - [AD 2013-13-14](https://openairdocs.org/ad/2013-13-14): Main Rotor Head · JJASPP Engineering Services UH-1H, UH-1F, TH-1L and 33 more. Effective Jul 24, 2013 - [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 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 - [AD 88-08-01](https://openairdocs.org/ad/88-08-01): Rod End Bearing Assembly · Bell Helicopter Textron TH-1L, UH-1E, UH-1L and 5 more. Effective May 6, 1988 ### Matched by engine (Lycoming T53-L-11D) None in force. ### Historical (superseded or no longer in force) - [AD 2021-23-13](https://openairdocs.org/ad/2021-23-13) (historical): Ground Proximity System · Airbus Helicopters K-225, K-190A, K-240 and 237 more. Effective Dec 9, 2021 - [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 80-17-09](https://openairdocs.org/ad/80-17-09) (historical): Main Rotor Straps · Bell Helicopter Textron 204B, 205A-1, 212 and 16 more. Effective Sep 15, 1980 ## Information bulletins (advisory) (3 in force) - [SAIB SW-18-29R1](https://openairdocs.org/saib/SW-18-29R1): Rotorcraft Tail Boom, Attach Structure Failure. Issued Feb 19, 2019 - [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 - [SAIB SW-18-29](https://openairdocs.org/saib/SW-18-29) (historical): Rotorcraft Tail Boom, Attach Structure Failure. Issued Oct 1, 2018 ## NTSB investigations None matched to N911KK. ## FAA accident and incident reports None matched to N911KK. ## 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) (12) 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 (Bell UH-1E) - [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 SR00119DE](https://openairdocs.org/stc/SR00119DE): Installation of an upgraded 42 degree Tail Rotor gearbox, P/N 212-040-003, and Control Cables. Midwest Aerospace TC LLC - [STC SR09177RC](https://openairdocs.org/stc/SR09177RC): Modification of the vertical fin spar. Midwest Aerospace TC LLC - [STC SH5690NM](https://openairdocs.org/stc/SH5690NM): Installation of Advanced Technology Aircraft Co. engine barrier filter. WSH, LLC - [STC SR02596SE](https://openairdocs.org/stc/SR02596SE): Installation of Olympic Aero Services, Inc. Additional Telemetry Unit (ATU). OLYMPIC AERO SERVICES INC - [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 SR09316RC](https://openairdocs.org/stc/SR09316RC): Fabrication, 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 LLC - [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 - [STC SR00332NY](https://openairdocs.org/stc/SR00332NY): Installation of Avionics Specialties power analyzer and recorder no. SL17009 and SL17061. Aerosonic Corporation ## Related - Other Bell UH-1E aircraft: https://openairdocs.org/model/bell-uh-1e/aircraft.md - The Lycoming T53-L-11D engine: https://openairdocs.org/engine/lycoming-t53-l-11d.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.