- Registered owner
- Diedrich Stephan A
- Location
- Sandpoint, ID
- Owner type
- Individual
- Serial number
- 5858
- Year built
- 1942
- Type
- Fixed wing single engine
- Engine
- Reciprocating
- Airworthiness
- Standard, normal
- Airworthiness date
- June 8, 2007
- Certificate issued
- August 18, 2017
- Expires
- August 31, 2027
- Mode S code
- A49F86
From the FAA registry file of October 24, 2026.
On this page
Airworthiness directives that may apply · 1
Matched by this aircraft’s airframe and engine models. Each AD’s applicability may narrow it by serial number, part number or equipment.
Engine · Continental W670-6A
AD 50-12-01Propeller BladeInformation bulletins that may apply
Advisory, not mandatory.
No bulletins matched this aircraft’s models
NTSB investigations
No NTSB investigations matched to N39725Matched 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 Waco UPF-7 aircraft
FAA incident reports
No FAA accident or incident reports matched to N39725Matched 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 Waco UPF-7 aircraft
Service difficulty reports
No reports matched to N39725General 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 Waco UPF-7 aircraft
STCs that may be installed · 45
Approved for this aircraft’s airframe or engine model. The registry doesn’t record which STCs an aircraft has; its records do.
Airframe · Waco UPF-7
STC SA04652CHTo allow use of 100R grade aviation fuel meeting Swift Fuel, LLC specificationSTC SA00079NYInstallation of Airwolf remote mounted engine oil filter kit AFC-K008 on single and multi engine fixed wing light aircraft incorporating Teledyne Continental reciprocating engines of 450 horsepower or less.STC SA7965SWApplication of fabric and polyurethane finishing system.