Piper PA-34 Seneca Supplemental Type Certificates (STCs)

277 STCs approved for the Piper PA-34 Seneca (PA-34-220T Seneca III) family · FAA quick reference

Quick reference only — not a compliance record. This list is for research convenience and may be incomplete or out of date. It is not an airworthiness compliance determination. Always verify against the official FAA record, and check directly with the FAA before relying on it. ADs are mandatory; STCs indicate approval for the type (not installation on a specific airframe); SAIBs are advisory.

Supplemental Type Certificates (STCs) approved for the Piper PA-34 Seneca type — FAA-approved modifications available for this aircraft family. Approval for the TYPE does not mean a given STC is installed on any individual airframe (that lives in the logbooks/337s).

Document	Title / Subject	Date
SA01147WI	Installation of Concorde FLA or VRSLA series batteries in Piper Light Airplanes. — Concorde Battery Corporation	2026-04-01
SA02511SE	Installation of replacement fuel quantity indicator sending unit(s) — CiES Inc.	2026-03-16
SA04046CH PAGE 2	Installation of L-3 GENESIS (TM) Electronic Standby Instrument System (ESI-500/MAG-500) — Acron Aviation Inc.	2025-04-01

+ 274 more STCs for the Piper PA-34 Seneca family.

The complete, searchable Supplemental Type Certificates list — with in-app PDF viewing and a combined download — is part of AeroTell.

See all 277 STCs in the AeroTell app →