ST01675CH
Installation of Butterfly Valve Ring AIR23028 in starter control valves, part number 775538 or 799700. Held by Cook Airtomic, which holds 5 approved modifications in all. Last revised July 9, 2002. System: engine.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Airbus; Airbus; Airbus; Airbus; Airbus; Airbus; Airbus; Airbus; Airbus; Airbus; Airbus; Airbus; Airbus; Airbus; The Boeing Company; The Boeing Company; The Boeing Company; The Boeing Company; The Boeing Company; The Boeing Company; The Boeing Company; The Boeing Company; The Boeing Company; The Boeing Company; The Boeing Company; The Boeing Company; The Boeing Company; The Boeing Company; The Boeing Company; The Boeing Company; The Boeing Company; The Boeing Company; The Boeing Company; The Boeing Company; McDonnell Douglas Corporation; McDonnell Douglas Corporation
- Models
- A300 B2-1C, A300 B4-620, A300 B4-603, A300 B4-601, A300 B4-203, A300 B2-203, A300 B4-103, A300 B4-2C, A300 B2-1A, A300 B2K-3C, A300 B4-605R, A300 F4-622R, A300 F4-605R, A300 B4-622R, 767-400ER, 767-300F Series, 767-300 Series, 767-200 Series, 747-100B SUD Series, 747-100 Series, 747-200B Series, 747-200F Series, 747-200C Series, 747SR Series, 747SP Series, 747-300 Series, 747-400 Series, 747-400D Series, 747-400F Series, 747-100B Series, 757 Series, 757-200PF Series, 757-200CB Series, 757-300, MD-11F, MD-11
- Type certificates
- A35EU, A35EU, A35EU, A35EU, A35EU, A35EU, A35EU, A35EU, A35EU, A35EU, A35EU, A35EU, A35EU, A35EU, A1NM, A1NM, A1NM, A1NM, A20WE, A20WE, A20WE, A20WE, A20WE, A20WE, A20WE, A20WE, A20WE, A20WE, A20WE, A20WE, A2NM, A2NM, A2NM, A2NM, A22WE, A22WE
- On this site
- Airbus A300 120 registered
Boeing 747 192 registered
Boeing 757 440 registered
Boeing 767 583 registered
Mcdonnell Douglas MD-11 104 registered - The FAA's record
- On the FAA's site
What an approved modification is
A supplemental type certificate is the FAA's approval of a change to a certified design: a new engine or propeller, avionics, an autopilot, floats, a parachute, a larger fuel tank, an ice-protection kit. The company holding it may sell the kit and the paperwork to owners of the listed models; the modification then becomes part of that aircraft's record. The FAA's list says what was approved and for which models, not how many aircraft carry it.
Source: FAA supplemental type certificates (Dynamic Regulatory System). Register counts from the FAA register of October 8, 2026.