- Registered owner
- Two Roan Ranch LLC
- Location
- Salem, OR
- Owner type
- LLC
- Serial number
- 154779
- Year built
- 1967
- Type
- Rotorcraft
- Engine
- Turbo-shaft
- Airworthiness
- Restricted, agriculture and pest control, forest, carriage of cargo
- Airworthiness date
- August 21, 1997
- Certificate issued
- May 19, 2022
- Expires
- May 31, 2029
- Mode S code
- A0DE76
Williams Helicopter Corp/Oas UH-1ETCDS H7SOAirframe · Williams Helicopter Corp/Oas UH-1EEngine modelLycoming T53-L-13B
From the FAA registry file of October 24, 2026.
On this page
Airworthiness directives that may apply · 25
Matched by this aircraft’s airframe and engine models. Each AD’s applicability may narrow it by serial number, part number or equipment.
| 1988 | 1 |
|---|---|
| 1989 | 1 |
| 1990 | 2 |
| 1991 | 1 |
| 1994 | 1 |
| 1995 | 1 |
| 1996 | 1 |
| 1997 | 1 |
| 1998 | 1 |
| 1999 | 1 |
| 2000 | 3 |
| 2002 | 3 |
| 2006 | 1 |
| 2010 | 1 |
| 2012 | 2 |
| 2021 | 2 |
| 2022 | 5 |
| 2024 | 1 |
Airframe · Williams Helicopter Corp/Oas UH-1E
AD 2024-19-17Rotorcraft flight controlAD 2022-20-14Main Rotor GearboxAD 2022-22-12Nose/Tail Landing Gear Structure/AxleInformation bulletins that may apply · 2
Advisory, not mandatory.
NTSB investigations
No NTSB investigations matched to N155TLMatched by N-number and event date, checked against the reported serial number, make and model. Investigations from before this aircraft carried the mark are under Earlier aircraft. Investigations on Williams Helicopter Corp/Oas UH-1E aircraft
FAA incident reports
No FAA accident or incident reports matched to N155TLMatched by N-number and event date, checked against the reported make and model. Reports from before this aircraft carried the mark are under Earlier aircraft. Reports on Williams Helicopter Corp/Oas UH-1E aircraft
Service difficulty reports
No reports matched to N155TLGeneral aviation reporting is voluntary. Matched to this aircraft by N-number and event date, checked against the reported serial number, make and model. Reports on Williams Helicopter Corp/Oas UH-1E aircraft
STCs that may be installed · 14
Approved for this aircraft’s airframe or engine model. The registry doesn’t record which STCs an aircraft has; its records do.
Airframe · Williams Helicopter Corp/Oas UH-1E
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 SH5690NMInstallation of Advanced Technology Aircraft Co. engine barrier filter.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 SR01742NYInstallation of extended height landing gear.STC 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 SR02204LAInstallation of an AKV, INC. N1/N2 Cycle Counter, PN UH1T53CCSTC SR00103SEInstallation of Aviation Development Corporation oil filterSTC 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.