The U.S. aircraft register, updated daily
FAA orders · airworthiness directive · current

85-23-07: Autopilot Systems

FAA order 85-23-07 is an airworthiness directive in force since January 27, 1986. The FAA's subject line: Autopilot Systems. It names Aerostar Acft Corp Of Texas M20, Beechcraft A36 Bonanza, Beechcraft B36 Bonanza, Cessna 172 Skyhawk, Cessna 182 Skylane, Cessna 210 Centurion, Cessna R182 Skylane RG, Cessna T182 Turbo Skylane, Cessna T210 Turbo Centurion, Cessna TR182 Turbo Skylane RG, Cessna TU206, Cessna U206 Stationair, Daher (Socata) TB-20, Mooney M-20, Partenavia S.P.A. P 68, Piper PA-28 Cherokee, Warrior, Archer and Arrow, Piper PA-32 Cherokee Six, Lance and Saratoga, Piper PA-34 Seneca, Piper PA-46 Malibu, Mirage, Matrix and M-Class, Piper PA-60 Aerostar, Vulcanair Spa P68: about 73,186 aircraft on the U.S. register today across them, though an order usually covers particular versions or serial numbers rather than every one. System: flight controls.

What it applies to as the FAA lists it

Kind of product
Appliance
Makes
Aerostar Aircraft Corporation; Cessna Aircraft Company; Mooney Aviation Company Inc; SOCATA; Vulcanair S.p.A.; Textron Aviation Inc.; Piper Aircraft Inc.
Models
PA-60-700P (Aerostar 700P), 172L, 172P, 172RG, 182P, 182Q, 182R, 210R, F182P, F182Q, FR182, R182, T182, T210R, TR182, TU206G, U206G, A36, A36TC, B36TC, F33A, M20J, M20K, PA-28-161, PA-28-181, PA-28-236, PA-28RT-201, PA-28RT-201T, PA-32-301, PA-32-301T, PA-32R-301 (HP), PA-32R-301 (SP), PA-32R-301T, PA-34-200T, PA-34-220T, PA-46-310P, TB 20, AP68 TP Series 300 Spartacus, P 68C, P 68C-TC
On this site
Aerostar Acft Corp Of Texas M20 23 registered
Beechcraft A36 Bonanza 2,530 registered
Beechcraft B36 Bonanza 308 registered
Cessna 172 Skyhawk 20,670 registered
Cessna 182 Skylane 11,828 registered
Cessna 210 Centurion 1,526 registered
Cessna R182 Skylane RG 706 registered
Cessna T182 Turbo Skylane 935 registered
Cessna T210 Turbo Centurion 1,284 registered
Cessna TR182 Turbo Skylane RG 465 registered
Cessna TU206 343 registered
Cessna U206 Stationair 798 registered
Daher (Socata) TB-20 200 registered
Mooney M-20 6,247 registered
Partenavia S.P.A. P 68 16 registered
Piper PA-28 Cherokee, Warrior, Archer and Arrow 18,633 registered
Piper PA-32 Cherokee Six, Lance and Saratoga 3,917 registered
Piper PA-34 Seneca 998 registered
Piper PA-46 Malibu, Mirage, Matrix and M-Class 1,692 registered
Piper PA-60 Aerostar 57 registered
Vulcanair Spa P68 10 registered

Dates and paperwork

In force since
January 27, 1986
Published
January 21, 1987 (signed January 10, 1986)
Docket
Unknown
Status
Current
The FAA's document
Read the order on the FAA's site

The order itself the regulatory text, as published

Show the full text (6,082 characters)
85-23-07 KING RADIO CORPORATION: Amendment 39-5217. Applies to Models KFC 150, KAP 150 and KAP 100 autopilot systems which use the following flight computers and are certificated to the applicable requirements of Technical Standard Orders C9c and C52a (*): \n\n\nMODEL\nPART NO.\nSERIAL NO. \nKC 190\n065-0055-00\nall serial numbers \n\n065-0055-01\nall serial numbers \n\n065-0055-02\n1474 and below \n\n065-0055-03\n10095 and below \nKC 191\n065-0054-00\nall serial numbers \n\n065-0054-01\nall serial numbers \n\n065-0054-02\n20754 and below \n\n065-0054-03\n30227 and below \n\n065-0054-04\n20754 and below \n\n065-0054-05\n30227 and below \nKC 192\n065-0042-00\nall serial numbers \n\n065-0042-01\nall serial numbers \n\n065-0042-02\n40614 and below \n\n065-0042-03\n50464 and below \n\n065-0042-04\n40614 and below \n\n065-0042-05\n50464 and below \n\n\t(*)\tUnits with serial numbers above those stated comply with this AD at the time of shipment from King Radio Corporation. \n\n\tCompliance: Required as indicated unless already accomplished. \n\n\tTo prevent undetected trim malfunctions that may result in significant mistrim conditions, accomplish the following: \n\n\t(a)\tFor affected flight computers not installed in an aircraft, prior to further use, modify the computer in accordance with the instructions contained in King Radio Corporation Alert Service Bulletin KC 190/191/192-9 dated November 6, 1985. \n\n\t(b)\tFor affected flight computers installed in the following airplanes: \n\n\nAIRCRAFT MAKE AND MODEL\nSTC NUMBER\n\n\nMooney M20J, M20K\nSA1561CE-D\nPiper PA-28RT-201, PA-28RT-201T\nSA1563CE-D\nPiper PA-28-161, PA-28-181, PA-28-236\nSA1565CE-D\nPiper PA-32-301, PA-32-301T\nSA1567CE-D\nCessna 172RG\nSA1568CE-D\nCessna U206G, TU206G (Landplane, \n\n Seaplane, and Amphibian)\nSA1569CE-D\nCessna 172P\nSA1570CE-D\nCessna R182, TR182\nSA1571CE-D\nPiper PA-32R-301, PA-32R-301T\nSA1572CE-D\nBeech A36, A36TC, B36TC\nSA1574CE-D\nPiper PA-34-200T, PA-34-220T\nSA1575CE-D\nCessna 182P, 182Q, 182R, T182\nSA1770CE-D\nCessna 172L S/N 17256631\nSA1772CE-D\nPiper PA-46-310P\nSA1778CE-D\nReims-Cessna FR182\nSA1783CE-D\nPartenavia AP68TP 300\nSA1784CE-D\nSOCATA TB20\nSA1785CE-D\nBeech F33A\nSA1789CE-D\nPartenavia P68C, P68C-TC\nSA1791CE-D\nReims-Cessna F182P, F182Q\nSA1794CE-D\nCessna 210R, T210R\nSA2050CE-D\n\n\t\t(1)\tWithin the next 10 hours time-in-service (TIS) after the effective date of this AD, deactivate the autopilot and electric trim by pulling the respective circuit breakers and banding by placing a tie wrap equivalent around the circuit breaker stem. \n\n\t\t(2)\tFabricate and install on the instrument panel in clear view of the pilot the following placard using letters of a minimum 0.10 inch in height: "AP AND ELECTRIC TRIM INOPERATIVE PER AD 85-23-07" and operate the aircraft accordingly. \n\n\t\t(3)\tWithin 50 hours TIS or 120 calendar days, whichever comes first, after the effective date of this AD, modify the flight computer in accordance with the instructions contained in King Radio Corporation Alert Service Bulletin KC 190/191/192-9 dated November 6, 1985. \n\n\t\t(4)\tThe requirements of paragraphs (b)(1) and (b)(2) of this AD may be accomplished by the holder of a pilot certificate issued under Part 61 of the Federal Aviation Regulations (FARs) on any airplane owned or operated by him. The person accomplishing these actions must make the appropriate aircraft maintenance record entry as prescribed by FAR 91.173. \n\n\t\t(5)\tThe requirements of paragraphs (b)(1) and (b)(2) of this AD are no longer required when paragraph (b)(3) of this AD has been accomplished. \n\n\t(c)\tFor affected flight computers installed in the following airplanes: \n\n\nAIRCRAFT MAKE AND MODEL\nSTC NUMBER \nPiper PA-60-700P\nSA1777CE-D \n\t\t(1)\tWithin the next 10 hours TIS after the effective date of this AD, deactivate the autopilot by pulling the respective circuit breaker and banding open by placing a tie wrap or equivalent around the circuit breaker stem.(2)\tFabricate and install on the instrument panel in clear view of the pilot the following placard using letters of a minimum 0.10 inch in height: "AP INOPERATIVE PER AD 85-23-07", and operate the aircraft accordingly. \n\n\t\t(3)\tWithin 50 hours TIS or 120 calendar days, whichever comes first, following the effective date of this AD, modify the flight computer in accordance with the instructions contained in King Radio Corporation Alert Service Bulletin KC190/191/192-9 dated November 6, 1985. \n\n\t\t(4)\tThe requirements of paragraphs (c)(1) and (c)(2) of this AD may be accomplished by the holder of a pilot certificate issued under Part 61 of the Federal Aviation Regulations (FARs) on any airplane owned or operated by him. The person accomplishing these actions must make the appropriate aircraft maintenance record entry as prescribed by FAR 91.173. \n\n\t\t(5)\tThe requirements of paragraphs (c)(1) and (c)(2) of this AD are no longer required when paragraph (c)(3) of this AD has been accomplished. \n\n\t(d)\tThe modification requirements of paragraphs (b)(3) and (c)(3) of this AD must be accomplished by an appropriate FAA certified radio repair station. \n\n\t(e)\tAircraft may be flown in accordance with Federal Aviation Regulation 21.197 to a location where this AD can be accomplished. \n\n\t(f)\tAn equivalent method of compliance with this AD, if used, must be approved by the Manager, Wichita Aircraft Certification Office, 1801 Airport Road, Room 100, Mid-Continent Airport, Wichita, Kansas 67209. \n\n\tAll persons affected by this directive may obtain copies of the documents referred to herein upon request to King Radio Corporation, 400 North Rogers Road, Olathe, Kansas 66062, or the FAA, Rules Docket, Office of the Regional Counsel, Room 1558, 601 East 12th Street, Kansas City, Missouri 64106. \n\n\tThis amendment becomes effective January 27, 1986, as to all persons except those persons to whom it was made immediately effective by priority letter AD 85-23-07, issued November 20, 1985, which contained this amendment.

Related safety bulletins advice on the same designs, not orders

2026-03-242026-08 · Floats
2025-07-282025-07 · Reciprocating Engine Supercharger
2023-03-032023-02 · Landing Gear System
2022-12-06CE-19-01 R1 · Engine Oil and Airplane Hour Meter; Pressure Switch Failure
2022-10-192022-20 · Wing Spar

Source: FAA Dynamic Regulatory System, airworthiness directives. The FAA's document is the authority; the register counts are this site's, from the FAA register of October 7, 2026. Connections as data: /graph/directive/85-23-07.json · aircraft systems.