# AD 85-25-02: Autopilot Systems - Type: Airworthiness directive - Status: Current - Products: King Radio Autopilot Systems, M20J, M20K and TB 20 - Effective: January 27, 1986 - Superseded by: Nothing supersedes this AD - Product type: Appliance - Amendment: 39-5218 - Registered aircraft: 2,379 may be affected, by airframe or engine model (OpenAirDocs) - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/9DCD8807728632F786256A39004C473C.0001 - DRS record last changed: May 30, 2024 - Page: https://openairdocs.org/ad/85-25-02 ## The airworthiness directive 85-25-02 KING RADIO CORPORATION: Amendment 39-5218. Applies to Models KFC 200, KFC 150, KAP 150 and KAP 100 autopilot systems utilizing Models KS 177 pitch servo, P/N 065-0050-04 and -012 and/or Model KS 178 roll servo, P/N 065-0051-01 and -02, S/N 2461 and below. These autopilot systems have been installed in accordance with Supplemental Type Certificates (STC) shown in the following table. Some airplane logbooks may not show evidence of the STC number: AUTOPILOT MODEL AIRPLANE MODEL STC AXIS AFFECTED KFC 200 Mooney M20J, M20K SA1771CE-D* pitch and roll KFC 150, KAP 150 Mooney M20J, M20K SA1561CE-D pitch and roll KAP100 Mooney M20J, M20K SA1561CE-D roll KFC 150, KAP 150 SOCATA Model TB-20 SA1785CE-D pitch *NOTE: KFC 200 installations in Mooney Models M20J, S/N 24-1418 and earlier except S/N 24-1368, and M20K, S/N 25-0790 and earlier except S/N 25-0740, airplanes (STCs SA1212CE and SA1464CE) are not affected by this AD. Compliance: Required as indicated unless already accomplished. To prevent loss of primary pitch and/or roll control, accomplish the following: (a) Within the next 5 hours time-in-service or within the next 10 calendar days after the effective date of this AD, whichever occurs first, modify the affected servo actuator(s) to provide for safetying of the cable guard attaching hardware in accordance with King Radio Alert Service Bulletin KS 177/178-3 dated December 4, 1985, as supplemented. (These servos are used on all affected KFC 150, KAP 150, and KAP 100, as well as some KFC 200 ((see NOTE above)) installations.) (b) Aircraft may be flown in accordance with Federal Aviation Regulation (FAR) 21.197 to a location where this AD can be accomplished. (c) 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 85-25-02, issued December 11, 1985, which contained this amendment. ## Affected data sheets (2) (OpenAirDocs) The type certificate data sheets whose models the AD names. - [TCDS 2A3](https://openairdocs.org/tcds/2A3): Mooney International Corporation; names 2 of 17 models: M20K, M20J - [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: 2,379 (2,379 by airframe model, 0 by engine model) - Makers: Mooney 2,179, Socata 200 Models with the most aircraft: - [Mooney M20J](https://openairdocs.org/model/mooney-m20j): 1,408 aircraft (airframe model) - [Mooney M20K](https://openairdocs.org/model/mooney-m20k): 771 aircraft (airframe model) - [Socata TB-20 TRINIDAD](https://openairdocs.org/model/socata-tb-20-trinidad): 175 aircraft (airframe model) - [Socata TB20](https://openairdocs.org/model/socata-tb20): 25 aircraft (airframe model) All 4 models: https://openairdocs.org/ad/85-25-02/models.md Every aircraft: https://openairdocs.org/ad/85-25-02/aircraft.md ## Related documents - [STC SA1212CE](https://openairdocs.org/stc/SA1212CE): Installation of King KFC 200 2 axis (3 optional) flight control system with KCS 55/55A compass and King KI-255 (or -256) flight command indicator or a KG-258 attitude horizon gyro with a KC-292 mode controller or third axis (yaw damper) only, or manual electric trim only. Honeywell International Inc, Cited in the text - [STC SA1464CE](https://openairdocs.org/stc/SA1464CE): Install KFC 200 two axis (three optional) flight control system.. Honeywell International Inc, Cited in the text - [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 SA1771CE-D](https://openairdocs.org/stc/SA1771CE-D): Installation of King KFC 200 flight control system (2 axis), with or without flight director. 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 --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.