# STC SA266SO

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Avco Corporation, United States
- Description: Modification of fuel cap 16097-00 by making a new cover and enlarging the lower vent hole. Rework fuel cell filler neck door 19049-06 by putting a spring loading vent in the door to be used as auxiliary vent during icing conditions.
- Status date: January 1, 1960
- Product: Aircraft, Small Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 1A10](https://openairdocs.org/tcds/1A10)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/F749640D1D03F07E862570C9005FD064.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA266SO

## ADs that name it (0)

None.

## Approved models (1)

- The New Piper Aircraft Inc. PA-23 Series ([TCDS 1A10](https://openairdocs.org/tcds/1A10))

---
From OpenAirDocs.org, an independent open copy of FAA and NTSB data. Only the Federal Register edition on govinfo.gov is the official legal text of an AD.