- Registered owner
- Dallas Aero & Sales LLC
- Location
- Poplar, MT
- Owner type
- LLC
- Serial number
- 421C0650
- Year built
- 1979
- Type
- Fixed wing multi engine
- Engine
- Reciprocating
- Airworthiness
- Standard, normal
- Airworthiness date
- April 10, 1979
- Certificate issued
- June 15, 2012
- Expires
- June 30, 2028
- Mode S code
- A1B930
From the FAA registry file of October 24, 2026. The registry lists only the engine series, so ADs for every Continental TSIO-520 model are included below.
On this page
Airworthiness directives that may apply · 87
Matched by this aircraft’s airframe and engine models. Each AD’s applicability may narrow it by serial number, part number or equipment.
| 1969 | 1 |
|---|---|
| 1970 | 1 |
| 1971 | 1 |
| 1972 | 3 |
| 1975 | 1 |
| 1976 | 3 |
| 1977 | 2 |
| 1978 | 2 |
| 1979 | 2 |
| 1980 | 6 |
| 1981 | 2 |
| 1982 | 1 |
| 1984 | 2 |
| 1985 | 1 |
| 1986 | 1 |
| 1987 | 2 |
| 1988 | 4 |
| 1989 | 2 |
| 1990 | 3 |
| 1991 | 1 |
| 1992 | 1 |
| 1993 | 3 |
| 1994 | 1 |
| 1995 | 2 |
| 1996 | 1 |
| 1997 | 1 |
| 1998 | 5 |
| 1999 | 1 |
| 2000 | 2 |
| 2001 | 1 |
| 2004 | 2 |
| 2005 | 3 |
| 2007 | 2 |
| 2008 | 2 |
| 2009 | 2 |
| 2010 | 2 |
| 2011 | 2 |
| 2012 | 2 |
| 2014 | 1 |
| 2016 | 3 |
| 2018 | 2 |
| 2020 | 1 |
| 2022 | 2 |
| 2023 | 6 |
See all 100 ADs
Information bulletins that may apply · 21
Advisory, not mandatory.
See all 23 bulletins
NTSB investigations
No NTSB investigations matched to N21WUMatched 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 Cessna 421C aircraft
FAA incident reports
No FAA accident or incident reports matched to N21WUMatched 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 Cessna 421C aircraft
Service difficulty reports · 3
Matched to this aircraft by N-number and event date, checked against the reported serial number, make and model.
SDR FMMA20111005002Retainer · brokenROCKER SHAFT RETAINER BROKE LETTING 1/3 OF RETAINER TO DROB TO BOTTOM OF ROCKER BOX COVER WHERE IT LODGED BETWEEN END OF ROCKER ARM. PUNCHED HOLE IN COVER - LETTING OIL TO ESCAPE. PROB CAUSE: CRACKED AT ASSEMBLY.SDR FMMA20111005001Unknown · malfunctionedNO OIL PRESSURE RIGHT ENGINE. RIGHT PROPELLER WOULD NOT COMPLETELY FEATHER.SDR 2011F00188Oil System · low pressureNO OIL PRESSURE RIGHT ENGINE. RIGHT ENGINE WOULD NOT COMPLETELY FEATHER.
STCs that may be installed · 368
Approved for this aircraft’s airframe or engine model. The registry doesn’t record which STCs an aircraft has; its records do.
Airframe · Cessna 421C
STC SA02571SEInstallation of Garmin G500/G600 TXi Integrated Avionics System (Primary Flight Display, Multi-Function Display, and Engine Indicating System Display).STC SA01800SEFabrication and installation of new or replacement of existing instrument panel lights dimmer control.STC SA01861SEFabrication and installation of Landing Light Controller