- Registered owner
- Johnson Airspray Inc
- Location
- Argyle, MN
- Owner type
- Corporation
- Serial number
- 68-16891
- Year built
- 1968
- Type
- Rotorcraft
- Engine
- Turbo-shaft
- Airworthiness
- Experimental, exhibition
- Airworthiness date
- February 24, 2004
- Certificate issued
- July 31, 2003
- Expires
- October 31, 2027
- Mode S code
- AC7F9E
From the FAA registry file of October 24, 2026. The registry lists only the engine series, so ADs for every Allison T63 model are included below.
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 · Allison T63 series
AD 2012-03-06Fuel servo diaphragmInformation bulletins that may apply · 3
Advisory, not mandatory.
NTSB investigations
No NTSB investigations matched to N904SFMatched 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 Bell OH-58A aircraft
FAA incident reports
No FAA accident or incident reports matched to N904SFMatched 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 Bell OH-58A aircraft
Service difficulty reports
No reports matched to N904SFGeneral 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 Bell OH-58A aircraft
STCs that may be installed · 4
Approved for this aircraft’s airframe or engine model. The registry doesn’t record which STCs an aircraft has; its records do.
Engine · Allison T63 series
STC SE03309CHInstallation of Engine Preheat Kit, p/n TSP6CYL-2927-115 for 115 volt applicationSTC SE1780NMInstallation of Precise Flight standby vacuum system (SVS III).STC SE09513SCInstallation and usage of Exxon 20W50 Multigrade aircraft engine oil conforming to Exxon Oil Formulation WS-3013.STC SE5879SWUse of Phillips X/C II 20W-50 and25W-60 oil (OSS 55875) in all Avco reciprocating aircraft engines from 65 to 450 BHP.