# AD 85-23-07: Autopilot Systems - Type: Airworthiness directive - Status: Current - Products: Aerostar PA-60-700P (Aerostar 700P), 172L, 172P, 172RG, 182P, 182Q, 182R, 210R, F182P, F182Q, FR182, R182 and 28 more - Effective: January 27, 1986 - Published: January 21, 1987 - Issued: January 10, 1986 - Superseded by: Nothing supersedes this AD - Product type: Appliance - Amendment: 39-5217 - Registered aircraft: 22,936 may be affected, by airframe or engine model (OpenAirDocs) - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/838A901086F874F286256A39004C406B.0001 - DRS record last changed: November 21, 2025 - Page: https://openairdocs.org/ad/85-23-07 ## The airworthiness directive 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 (*): MODEL PART NO. SERIAL NO. KC 190 065-0055-00 all serial numbers 065-0055-01 all serial numbers 065-0055-02 1474 and below 065-0055-03 10095 and below KC 191 065-0054-00 all serial numbers 065-0054-01 all serial numbers 065-0054-02 20754 and below 065-0054-03 30227 and below 065-0054-04 20754 and below 065-0054-05 30227 and below KC 192 065-0042-00 all serial numbers 065-0042-01 all serial numbers 065-0042-02 40614 and below 065-0042-03 50464 and below 065-0042-04 40614 and below 065-0042-05 50464 and below (*) Units with serial numbers above those stated comply with this AD at the time of shipment from King Radio Corporation. Compliance: Required as indicated unless already accomplished. To prevent undetected trim malfunctions that may result in significant mistrim conditions, accomplish the following: (a) For 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. (b) For affected flight computers installed in the following airplanes: AIRCRAFT MAKE AND MODEL STC NUMBER Mooney M20J, M20K SA1561CE-D Piper PA-28RT-201, PA-28RT-201T SA1563CE-D Piper PA-28-161, PA-28-181, PA-28-236 SA1565CE-D Piper PA-32-301, PA-32-301T SA1567CE-D Cessna 172RG SA1568CE-D Cessna U206G, TU206G (Landplane, Seaplane, and Amphibian) SA1569CE-D Cessna 172P SA1570CE-D Cessna R182, TR182 SA1571CE-D Piper PA-32R-301, PA-32R-301T SA1572CE-D Beech A36, A36TC, B36TC SA1574CE-D Piper PA-34-200T, PA-34-220T SA1575CE-D Cessna 182P, 182Q, 182R, T182 SA1770CE-D Cessna 172L S/N 17256631 SA1772CE-D Piper PA-46-310P SA1778CE-D Reims-Cessna FR182 SA1783CE-D Partenavia AP68TP 300 SA1784CE-D SOCATA TB20 SA1785CE-D Beech F33A SA1789CE-D Partenavia P68C, P68C-TC SA1791CE-D Reims-Cessna F182P, F182Q SA1794CE-D Cessna 210R, T210R SA2050CE-D (1) Within 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. (2) Fabricate 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. (3) Within 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. (4) The 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. (5) The 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. (c) For affected flight computers installed in the following airplanes: AIRCRAFT MAKE AND MODEL STC NUMBER Piper PA-60-700P SA1777CE-D (1) Within 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) Fabricate 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. (3) Within 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. (4) The 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. (5) The 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. (d) The modification requirements of paragraphs (b)(3) and (c)(3) of this AD must be accomplished by an appropriate FAA certified radio repair station. (e) Aircraft may be flown in accordance with Federal Aviation Regulation 21.197 to a location where this AD can be accomplished. (f) An 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. All 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. This 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. ## Affected data sheets (15) (OpenAirDocs) The type certificate data sheets whose models the AD names. - [TCDS 3A13](https://openairdocs.org/tcds/3A13): Textron Aviation Inc.; names 6 of 23 models: 182P, TR182, 182Q, 182R, T182, R182 - [TCDS 2A13](https://openairdocs.org/tcds/2A13): Piper Aircraft Inc.; names 5 of 18 models: PA-28-236, PA-28-161, PA-28RT-201, PA-28-181, PA-28RT-201T - [TCDS 3A15](https://openairdocs.org/tcds/3A15): Textron Aviation Inc.; names 4 of 27 models: B36TC, A36, F33A, A36TC - [TCDS A3SO](https://openairdocs.org/tcds/A3SO): Piper Aircraft Inc.; names 4 of 13 models: PA-32-301, PA-32-301T, PA-32R-301T, PA-32R-301 (SP) - [TCDS A31EU](https://openairdocs.org/tcds/A31EU): Vulcanair S.p.A.; names 3 of 10 models: P.68C-TC, P.68C, AP68TP-300 Spartacus - [TCDS A42EU](https://openairdocs.org/tcds/A42EU): Textron Aviation Inc.; names 3 of 3 models: FR182, F182P, F182Q - [TCDS 2A3](https://openairdocs.org/tcds/2A3): Mooney International Corporation; names 2 of 17 models: M20K, M20J - [TCDS 3A12](https://openairdocs.org/tcds/3A12): Textron Aviation Inc.; names 2 of 18 models: 172L, 172P - [TCDS 3A21](https://openairdocs.org/tcds/3A21): Textron Aviation Inc.; names 2 of 28 models: 210R, T210R - [TCDS A4CE](https://openairdocs.org/tcds/A4CE): Textron Aviation Inc.; names 2 of 29 models: TU206G, U206G - [TCDS A7SO](https://openairdocs.org/tcds/A7SO): Piper Aircraft Inc.; names 2 of 5 models: PA-34-200T (Seneca II), PA-34-220T (Seneca V) - [TCDS 3A17](https://openairdocs.org/tcds/3A17): Textron Aviation Inc.; names 1 of 12 models: 172RG - [TCDS A17WE](https://openairdocs.org/tcds/A17WE): Aerostar Aircraft Corporation; names 1 of 5 models: PA-60-700P (Aerostar 700P) - [TCDS A25SO](https://openairdocs.org/tcds/A25SO): Piper Aircraft Inc.; names 1 of 6 models: PA-46-310P - [TCDS A51EU](https://openairdocs.org/tcds/A51EU): Daher Aerospace; names 1 of 5 models: TB 20 ## Registered aircraft it may apply to (OpenAirDocs) Matched by airframe and engine model; the AD's applicability may narrow it by serial number, part number or equipment. - Aircraft: 22,936 (22,936 by airframe model, 0 by engine model) - Makers: Cessna 8,376, Piper 8,271, Beech 3,284, Mooney 2,179, Raytheon 530, Socata 200, New Piper 65, Partenavia 25, Vulcanair 5, Beech/Goedkerj L 1 Models with the most aircraft: - [Piper PA-28-181](https://openairdocs.org/model/piper-pa-28-181): 3,549 aircraft (airframe model) - [Cessna 182P](https://openairdocs.org/model/cessna-182p): 2,099 aircraft (airframe model) - [Beech A36](https://openairdocs.org/model/beech-a36): 1,907 aircraft (airframe model) - [Cessna 182Q](https://openairdocs.org/model/cessna-182q): 1,565 aircraft (airframe model) - [Piper PA-28-161](https://openairdocs.org/model/piper-pa-28-161): 1,526 aircraft (airframe model) - [Mooney M20J](https://openairdocs.org/model/mooney-m20j): 1,408 aircraft (airframe model) - [Cessna 172P](https://openairdocs.org/model/cessna-172p): 1,111 aircraft (airframe model) - [Beech F33A](https://openairdocs.org/model/beech-f33a): 978 aircraft (airframe model) - [Cessna 172L](https://openairdocs.org/model/cessna-172l): 857 aircraft (airframe model) - [Mooney M20K](https://openairdocs.org/model/mooney-m20k): 771 aircraft (airframe model) - [Cessna R182](https://openairdocs.org/model/cessna-r182): 706 aircraft (airframe model) - [Piper PA-34-200T](https://openairdocs.org/model/piper-pa-34-200t): 563 aircraft (airframe model) - [Piper PA-32R-301T](https://openairdocs.org/model/piper-pa-32r-301t): 536 aircraft (airframe model) - [Cessna 182R](https://openairdocs.org/model/cessna-182r): 487 aircraft (airframe model) - [Piper PA-28-236](https://openairdocs.org/model/piper-pa-28-236): 480 aircraft (airframe model) - [Cessna TR182](https://openairdocs.org/model/cessna-tr182): 465 aircraft (airframe model) - [Piper PA-32R-301](https://openairdocs.org/model/piper-pa-32r-301): 456 aircraft (airframe model) - [Raytheon A36](https://openairdocs.org/model/raytheon-a36): 448 aircraft (airframe model) - [Cessna 172RG](https://openairdocs.org/model/cessna-172rg): 445 aircraft (airframe model) - [Cessna U206G](https://openairdocs.org/model/cessna-u206g): 347 aircraft (airframe model) All 56 models: https://openairdocs.org/ad/85-23-07/models.md Every aircraft: https://openairdocs.org/ad/85-23-07/aircraft.md ## Related documents - [STC SA1561CE-D](https://openairdocs.org/stc/SA1561CE-D): Install KAP 100 single axis, KAP 150 two axis, or KFC 150 two axis Flight Control System and optional KAS 297B vertical speed and altitude selector.. Honeywell International Inc, Cited in the text - [STC SA1563CE-D](https://openairdocs.org/stc/SA1563CE-D): Install KAP 100 single axis, KAP 150 two axis, or KFC 150 two axis flight control System and optional KAS 297B Vertical Speed and Altitude Selector.. Honeywell International Inc, Cited in the text - [STC SA1565CE-D](https://openairdocs.org/stc/SA1565CE-D): Install KAP 100 single axis, KAP 150 two axis, or KFC 150 two axis flight control system and optional KAS 297B Vertical Speed and Altitude Selector. Honeywell International Inc, Cited in the text - [STC SA1567CE-D](https://openairdocs.org/stc/SA1567CE-D): Installation of KAP 100 single axis, KAP 150 two axis, or KFC 150 two axis flight control system, and optional KAS 297B vertical speed and altitude selector.. Honeywell International Inc, Cited in the text - [STC SA1568CE-D](https://openairdocs.org/stc/SA1568CE-D): Install KAP 100 single axis, KAP 150 two axis, or KFC 150 two axis flight control system.. Honeywell International Inc, Cited in the text - [STC SA1569CE-D](https://openairdocs.org/stc/SA1569CE-D): Install KAP 100 single axis, KAP 150 two axis or KFC 150 two axis flight control system and optional KAS 297B vertical speed and altitude selector.. Honeywell International Inc, Cited in the text - [STC SA1570CE-D](https://openairdocs.org/stc/SA1570CE-D): Installation of KAP 100 single axis, KAP 150 two axis, or KFC 150 two axis flight control system.. Honeywell International Inc, Cited in the text - [STC SA1571CE-D](https://openairdocs.org/stc/SA1571CE-D): Installation of KAP 100 single axis, KAP 150 two axis or KFC 150 two axis flight control system and optional KAS 297B vertical speed and altitude selector.. Honeywell International Inc, Cited in the text - [STC SA1572CE-D](https://openairdocs.org/stc/SA1572CE-D): Installation of KAP 100 single axis, KAP 150 two axis, or KFC 150 two axis flight control system, and optional KAS 297B vertical speed and altitude selector.. Honeywell International Inc, Cited in the text - [STC SA1574CE-D](https://openairdocs.org/stc/SA1574CE-D): Installation of KAP 100 single axis, KAP 150 two axis, or KFC 150 two axis Flight Control System with optional third (yaw) axis and optional KAS 297B vertical speed and altitude selector. Install optional stand alone manual electric trim system. Honeywell International Inc, Cited in the text - [STC SA1575CE-D](https://openairdocs.org/stc/SA1575CE-D): Install KAP-100 single axis, KAP-150 two or three axis or KFC-150 two or three axis flight control system, optional KAS-297B vertical speed and altitude selector and KFC-150 system with optional flight director displays.. Honeywell International Inc, Cited in the text - [STC SA1770CE-D](https://openairdocs.org/stc/SA1770CE-D): Installation of KAP 100 single axis, KAP 150 two axis, or KFC 150 two axis flight control system and optional KAS 297B vertical speed and altitude selector.. Honeywell International Inc, Cited in the text - [STC SA1772CE-D](https://openairdocs.org/stc/SA1772CE-D): Install KAP 150 two axis or KFC 150 two axis Flight Control system. Honeywell International Inc, Cited in the text - [STC SA1777CE-D](https://openairdocs.org/stc/SA1777CE-D): Installation of KAP 150 two-axis or KFC 150 two-axis flight control system with optional third (yaw) axis and optional KAP 297B Vertical Speed and Altitude Selector.. Honeywell International Inc, Cited in the text - [STC SA1778CE-D](https://openairdocs.org/stc/SA1778CE-D): Installation of KAP 100 single-axis, KAP 150 two-axis or KFC 150 two-axis flight control system with optional third (yaw) axis and opetional KAS 297B vertical speed and altitude selector. Honeywell International Inc, Cited in the text - [STC SA1783CE-D](https://openairdocs.org/stc/SA1783CE-D): Install KAP 100 single axis, KAP 150 two axis, or KFC150 two axis flight control system and optional KAS 297B vertical speed and altitude selector.. Honeywell International Inc, Cited in the text - [STC SA1784CE-D](https://openairdocs.org/stc/SA1784CE-D): Install KAP 150 three axis or KFC 150 three axis flight control system with optional KAS297B vertical speed and altitude selector.. Honeywell International Inc, Cited in the text - [STC SA1785CE-D](https://openairdocs.org/stc/SA1785CE-D): Install KAP 100 single axis, KAP 150 two axis, or KFC 150 two axis flight control system with optional KAS 297B vertical speed and altitude selector. Honeywell International Inc, Cited in the text - [STC SA1789CE-D](https://openairdocs.org/stc/SA1789CE-D): Install KAP 100 single axis, KAP 150 two axis, or KFC 150 two axis flight control system with optional third (yaw)axis and optional KAS 297B vertical speed and altitude selector. Honeywell International Inc, Cited in the text - [STC SA1791CE-D](https://openairdocs.org/stc/SA1791CE-D): Install KAP 100 single axis, KAP 150 two axis, or KFC 150 two axis flight control system with optional KAP 297B vertical speed and altitude selector.. Honeywell International Inc, Cited in the text - [STC SA1794CE-D](https://openairdocs.org/stc/SA1794CE-D): Install KAP 100 single axis, KAP 150 two axis, or KFC 150 two axis flight control system and optional KAS 297B vertical speed and altitude selector.. Honeywell International Inc, Cited in the text - [STC SA2050CE-D](https://openairdocs.org/stc/SA2050CE-D): Install KAP 100 single axis, KAP 150 two axis, or KFC 150 two axis Flight Control System and optional KAS 297B Vertical Speed and Altitude Selector.. Honeywell International Inc, Cited in the text --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. 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