The U.S. aircraft register, updated daily
Approved modifications · supplemental type certificate · current · amended

ST02547AT (2 OF 2)

Installation of a voice alert system. Held by Aircraft Components INC, which holds 22 approved modifications in all. Last revised May 13, 2003. System: other and general.

What it applies to

Kind of product
Aircraft
Design holder
Aerostar Aircraft Corporation; Aerostar Aircraft Corporation; Aerostar Aircraft Corporation; Aerostar Aircraft Corporation; Aerostar Aircraft Corporation; Commander Aircraft Company; Commander Aircraft Company; Commander Aircraft Company; Commander Aircraft Company; Commander Aircraft Company; Commander Aircraft Company; Commander Aircraft Company; Commander Aircraft Company; Gulfstream Aerospace Corporation; Latino American De Aviacion (Lavia) S.A.; Latino American De Aviacion (Lavia) S.A.; Latino American De Aviacion (Lavia) S.A.; Maule Aerospace Technology Inc.; Maule Aerospace Technology Inc.; Maule Aerospace Technology Inc.; Maule Aerospace Technology Inc.; Maule Aerospace Technology Inc.; Maule Aerospace Technology Inc.; Maule Aerospace Technology Inc.; Maule Aerospace Technology Inc.; Maule Aerospace Technology Inc.; Maule Aerospace Technology Inc.; Maule Aerospace Technology Inc.; Maule Aerospace Technology Inc.; Maule Aerospace Technology Inc.; Maule Aerospace Technology Inc.; Maule Aerospace Technology Inc.; Maule Aerospace Technology Inc.; Maule Aerospace Technology Inc.; Maule Aerospace Technology Inc.; Maule Aerospace Technology Inc.; Maule Aerospace Technology Inc.; Maule Aerospace Technology Inc.; Maule Aerospace Technology Inc.; Maule Aerospace Technology Inc.; Maule Aerospace Technology Inc.; Maule Aerospace Technology Inc.; Maule Aerospace Technology Inc.; Maule Aerospace Technology Inc.; Maule Aerospace Technology Inc.; Maule Aerospace Technology Inc.; Maule Aerospace Technology Inc.; Maule Aerospace Technology Inc.; Maule Aerospace Technology Inc.; Maule Aerospace Technology Inc.; Maule Aerospace Technology Inc.; Maule Aerospace Technology Inc.; Maule Aerospace Technology Inc.; Maule Aerospace Technology Inc.; Maule Aerospace Technology Inc.; Maule Aerospace Technology Inc.; Maule Aerospace Technology Inc.; Maule Aerospace Technology Inc.; Maule Aerospace Technology Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; Tiger Aircraft LLC; Tiger Aircraft LLC; Tiger Aircraft LLC; Tiger Aircraft LLC; Tiger Aircraft LLC; Tiger Aircraft LLC; Tiger Aircraft LLC; Tiger Aircraft LLC; Twin Commander Aircraft Corporation; Twin Commander Aircraft Corporation; Twin Commander Aircraft Corporation; Twin Commander Aircraft Corporation; Twin Commander Aircraft Corporation; Twin Commander Aircraft Corporation; Twin Commander Aircraft Corporation; Twin Commander Aircraft Corporation; Twin Commander Aircraft Corporation; Twin Commander Aircraft Corporation; Twin Commander Aircraft Corporation; Twin Commander Aircraft Corporation; Twin Commander Aircraft Corporation; Twin Commander Aircraft Corporation; Twin Commander Aircraft Corporation; Twin Commander Aircraft Corporation; Twin Commander Aircraft Corporation; Twin Commander Aircraft Corporation; Twin Commander Aircraft Corporation; Twin Commander Aircraft Corporation; Twin Commander Aircraft Corporation; Twin Commander Aircraft Corporation; Twin Commander Aircraft Corporation; Twin Commander Aircraft Corporation; Twin Commander Aircraft Corporation; Twin Commander Aircraft Corporation; Twin Commander Aircraft Corporation; Twin Commander Aircraft Corporation
Models
PA-60-600 (Aerostar 600), PA-60-601 (Aerostar 601), PA-60-601P (Aerostar 601P), PA-60-602P (Aerostar 602P), PA-60-700P (Aerostar 700P), 112, 112B, 112TC, 112TCA, 114, 114A, 114B, 114TC, 111, PA-25, PA-25-235, PA-25-260, Bee Dee M-4, M-4, M-4-180C, M-4-180S, M-4-180T, M-4-210, M-4-210C, M-4-210S, M-4-210T, M-4-220, M-4-220C, M-4-220S, M-4-220T, M-4C, M-4S, M-4T, M-5-180C, M-5-200, M-5-210C, M-5-210TC, M-5-220C, M-5-235C, M-6-180, M-6-235, M-7-235, M-7-235A, M-7-235B, M-7-235C, M-7-260, M-8-235, MT-7-235, MT-7-420, MX-7-160, MX-7-160C, MX-7-180, MX-7-180A, MX-7-180B, MX-7-235, MXT-7-160,...
Type certificates
A17WE, A17WE, A17WE, A17WE, A17WE, A12SO, A12SO, A12SO, A12SO, A12SO, A12SO, A12SO, A12SO, A11SO, 2A8, 2A8, 2A8, 3A23, 3A23, 3A23, 3A23, 3A23, 3A23, 3A23, 3A23, 3A23, 3A23, 3A23, 3A23, 3A23, 3A23, 3A23, 3A23, 3A23, 3A23, 3A23, 3A23, 3A23, 3A23, 3A23, 3A23, 3A23, 3A23, 3A23, 3A23, 3A23, 3A23, 3A23, 3A23, 3A23, 3A23, 3A23, 3A23, 3A23, 3A23, 3A23, 3A23, 3A23, 3A23, 1A10, 1A10, 1A10, 1A10, 1A15, 1A15, 1A15, 1A15, 1A6, 1A6, 1A6, 1A6, 1A6, 1A6, 1A6, 1A6, 2A13, 2A13, 2A13, 2A13, 2A13, 2A13, 2A13, 2A13, 2A13, 2A13, 2A13, 2A13, 2A13, 2A13, 2A13, 2A13, 2A13, 2A13, A19SO, A19SO, A1EA, A1EA, A1EA, A20SO, A20SO, A20SO, A20SO, A25SO, A25SO, A3SO, A3SO, A3SO, A3SO, A3SO, A3SO, A3SO, A3SO, A3SO, A3SO, A3SO, A7SO, A7SO, A7SO, A8EA, A8EA, A8EA, A8EA, A8EA, A8EA, A11EA, A11EA, A11EA, A11EA, A16EA, A16EA, A16EA, A16EA, 2A4, 2A4, 2A4, 2A4, 2A4, 2A4, 2A4, 2A4, 2A4, 2A4, 2A4, 2A4, 2A4, 2A4, 2A4, 2A4, 2A4, 2A4, 2A4, 6A1, 6A1, 6A1, 6A1, 6A1, 6A1, 6A1, 6A1, 6A1
On this site
Aero Commander 680 51 registered
Commander Aircraft Co 114 103 registered
Maule M-4 207 registered
Maule M-5 364 registered
Maule M-6 81 registered
Maule M-7 275 registered
Maule MT-7 76 registered
Maule MX-7 192 registered
Maule MXT-7 134 registered
Piper PA-22 Tri-Pacer and Colt 2,940 registered
Piper PA-23 Apache and Aztec 1,316 registered
Piper PA-24 Comanche 2,428 registered
Piper PA-25 Pawnee 455 registered
Piper PA-28 Cherokee, Warrior, Archer and Arrow 18,633 registered
Piper PA-30 Twin Comanche 879 registered
Piper PA-31 Navajo and Chieftain 935 registered
Piper PA-32 Cherokee Six, Lance and Saratoga 3,917 registered
Piper PA-34 Seneca 998 registered
Piper PA-39 Twin Comanche C/R 82 registered
Piper PA-44 Seminole 599 registered
Piper PA-46 Malibu, Mirage, Matrix and M-Class 1,692 registered
Piper PA-60 Aerostar 57 registered
Rockwell International 112 207 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 7, 2026.