Cessna 421A — Airworthiness Directives & records checklist
19 Cessna 421As are on the U.S. registry. Here’s what a records review covers for one — the Airworthiness Directives that apply, the known trouble spots, and the checklist a buyer or owner should hold every logbook against.
Airworthiness Directives that apply to the Cessna 421A
- one-timeAD 05-19928 — Airworthiness Directives; The Cessna Aircraft Company Models 401, 401A, 401B, 402, 402A, 402B, 402C, 404, 411, 411A, 414, 414A, 421, 421A, 421B, 421C, 425, and 441 Airplanes · 2005-10-12
The FAA adopts a new airworthiness directive (AD) for certain The Cessna Aircraft Company (Cessna) Models 401, 401A, 401B, 402, 402A, 402B, 402C, 404, 411, 411A, 414, 414A, 421, 421A, 421B, 421C, 425, and 441 airplanes equipped with certain avionics bus circuit breaker switches. …
- one-timeAD 92-16-18 — Airworthiness Directives; CESSNA Models 401, 402, 402A, 402B, 402C, 404, F406, 421, 421A, 421B, 421C, and 441 Airplanes · 1992-01-01
- one-timeAD 73-22-01 — Airworthiness Directives; CESSNA Models 340, 401, 401A, 401B, 402, 402A, 402B, 411, 411A, 414, 421, 421A, 421B Airplanes · 1973-01-01
This is the applicability list. Which of these are complied with, their computed next-due dates, and the 27 serial/mod-conditional ADs that actually apply to your aircraft come from its digitized logbooks — that’s the verified report.
Known trouble spots on the 421A
Many Hartzell and McCauley constant-speed props carry blade-shank or hub ADs plus a calendar/hours overhaul interval; blade corrosion and hub grease leaks are common findings. Confirm the prop AD status and last overhaul against the interval.
Twin Cessnas carry recurring wing-spar (lower cap / spar-strap) inspections and a complex hydraulic landing gear with known actuator, saddle and door-sequencing wear. Confirm the spar AD/SID inspection status and the landing-gear rigging and function checks.
The records checklist for a Cessna 421A
Enter a tail number and Tailplate reads its logbooks against this list — every AD matched to compliance evidence, next-due dates computed, damage history pulled, and a records-adjusted value.
Look up a tail number →or see the free AD listApplicability is derived from the FAA directive corpus and the aircraft’s type certificate; it is advisory and not a legal airworthiness determination. Compliance is established only from an aircraft’s actual records.