# AD 75-23-04: Electric Gear Systems - Type: Airworthiness directive - Status: Current - Products: Mooney M20, M20A, M20B, M20C, M20D, M20E, M20F, M20G, M20J, M20K, M20L, M20M and 3 more - Effective: December 8, 1975 - Superseded by: Nothing supersedes this AD - Product type: Aircraft, Small airplane - Amendment: 39-2415 - Registered aircraft: 6,238 may be affected, by airframe or engine model (OpenAirDocs) - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/40797B4900228F3786256A3B006FDDCF.0001 - DRS record last changed: May 30, 2024 - Page: https://openairdocs.org/ad/75-23-04 ## The airworthiness directive 75-23-04 MOONEY: Amendment 39-2415. Applies to all Mooney Model M20 series airplanes equipped with Mooney Electric Gear Systems incorporating a Dukes electric landing gear actuator, P/N 4196-00-1C. Compliance required within the next 25 hours time in service after the effective date of this AD, unless already accomplished within the last 75 hours time in service, and thereafter at intervals not to exceed the time in service from the last inspection specified in Paragraphs (a) and (b). To prevent further failures of the electric landing gear actuator, Dukes P/N 4196-00-1C, accomplish the following: (a) Within the next 25 hours time in service, accomplish Parts I and III, and thereafter at every 200 hours time in service, accomplish Part I of Mooney Aircraft Corporation Service Bulletin M20-190, dated January 16, 1975, or later FAA approved revision, or by an equivalent procedure approved by the Chief, Engineering and Manufacturing Branch, Southwest Region, Federal Aviation Administration, Fort Worth, Texas. (b) Within the next 25 hours time in service, and thereafter at every 100 hours time in service, accomplish Part II of Mooney Aircraft Corporation Service Bulletin M20-190 dated January 16, 1975, or later FAA approved revision, or by an equivalent procedure approved by the Chief, Engineering and Manufacturing Branch, Southwest Region, Federal Aviation Administration, Fort Worth, Texas. The manufacturer's specifications and procedures identified and described in this directive are incorporated herein and made a part hereof pursuant to 5 U.S.C. 522(a)(1). All persons affected by this directive who have not already received this document from the manufacturer may obtain a copy upon request to Mooney Aircraft Corporation, P. O. Box 72, Kerrville, Texas 78028. This document may also be examined at the office of the Regional Counsel, Southwest Region, FAA, 4400 Blue Mound Road, Fort Worth, Texas, and at FAA Headquarters, 800 Independence Avenue, S.W., Washington, D.C. A historical file on this AD, which includes the incorporated material in full, is maintained by the FAA at its headquarters in Washington, D.C., and at the Southwest Regional Office in Fort Worth, Texas. This amendment becomes effective on December 8, 1975. ## Affected data sheets (1) (OpenAirDocs) The type certificate data sheets whose models the AD names. - [TCDS 2A3](https://openairdocs.org/tcds/2A3): Mooney International Corporation; names 15 of 17 models: M20F, M20E, M20K, M20D, M20A, M20B, M20S, M20C… ## 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: 6,238 (6,238 by airframe model, 0 by engine model) - Makers: Mooney 6,199, Aerostar Acft Corp Of Texas 23, Mooney International 16 Models with the most aircraft: - [Mooney M20J](https://openairdocs.org/model/mooney-m20j): 1,408 aircraft (airframe model) - [Mooney M20C](https://openairdocs.org/model/mooney-m20c): 1,258 aircraft (airframe model) - [Mooney M20E](https://openairdocs.org/model/mooney-m20e): 829 aircraft (airframe model) - [Mooney M20K](https://openairdocs.org/model/mooney-m20k): 771 aircraft (airframe model) - [Mooney M20F](https://openairdocs.org/model/mooney-m20f): 721 aircraft (airframe model) - [Mooney M20R](https://openairdocs.org/model/mooney-m20r): 399 aircraft (airframe model) - [Mooney M20M](https://openairdocs.org/model/mooney-m20m): 249 aircraft (airframe model) - [Mooney M-20G](https://openairdocs.org/model/mooney-m-20g): 116 aircraft (airframe model) - [Mooney M20TN](https://openairdocs.org/model/mooney-m20tn): 107 aircraft (airframe model) - [Mooney M20B](https://openairdocs.org/model/mooney-m20b): 98 aircraft (airframe model) - [Mooney M20D](https://openairdocs.org/model/mooney-m20d): 88 aircraft (airframe model) - [Mooney M20A](https://openairdocs.org/model/mooney-m20a): 58 aircraft (airframe model) - [Mooney M20S](https://openairdocs.org/model/mooney-m20s): 58 aircraft (airframe model) - [Mooney M20](https://openairdocs.org/model/mooney-m20): 23 aircraft (airframe model) - [Mooney M20L](https://openairdocs.org/model/mooney-m20l): 16 aircraft (airframe model) - [Mooney International M20TN](https://openairdocs.org/model/mooney-international-m20tn): 12 aircraft (airframe model) - [Aerostar Acft Corp Of Texas M20E](https://openairdocs.org/model/aerostar-acft-corp-of-texas-m20e): 9 aircraft (airframe model) - [Aerostar Acft Corp Of Texas M20F](https://openairdocs.org/model/aerostar-acft-corp-of-texas-m20f): 8 aircraft (airframe model) - [Aerostar Acft Corp Of Texas M20C](https://openairdocs.org/model/aerostar-acft-corp-of-texas-m20c): 6 aircraft (airframe model) - [Mooney International M20R](https://openairdocs.org/model/mooney-international-m20r): 4 aircraft (airframe model) All 20 models: https://openairdocs.org/ad/75-23-04/models.md Every aircraft: https://openairdocs.org/ad/75-23-04/aircraft.md Its text cites no advisory circulars or STCs. --- 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.