The Aviation DataBase®
Complete Aviation Regulatory Library
Sept. 11 Sept. 11
DataBases updated: Jan 6th, 2026
Home Products Library Support Account Login Contact

STC Holder: Progressive Mfg Co

The STC search system is a complimentary service provided to the aviation community. We hope you find it useful. Our primary product is a comprehensive library of aviation regulations and standards, including tools for generating Airworthiness Directive compliance reports.

No. of STCs: 1

STC Holder:
Progressive Mfg Co
1101 S. Ninth Street, Kansas City, KS 66105, United States
If you are an STC Holder, Contact us to have your company added here!
STC No.: SA1388CEStatus: HistoricalApp Date: Rev Date: 12/08/1977
Description: Replace magnesium or aluminum for- ward thrust reverser blocker doors with nylon doors. (707, 720 AIRPLANES EQUIPPED WITH BOEING P/N 65-11685 AND 65-68862 FORWARD THRUST REVERSER DOORS)
TC Nos.: 4A21, 4A26, 4A28
Models:
The Boeing Company707, 707, 720
ACO: Wichita ACO Branch, Tel: +1 (316) 946-4100