# AD 81-14-02: Rudder Pedal V-Bar - Type: Airworthiness directive - Status: Current - Products: Maule Aerospace Technology M-4, M-4-180C, M-4-210C, M-4-220C, M-4-220S, M-4C, M-4S, M-4T, M-5-180C, M-5-210C, M-5-210TC, M-5-220C and 1 more - Effective: July 1, 1981 - Superseded by: Nothing supersedes this AD - Product type: Aircraft, Small airplane - Amendment: 39-4146 - Registered aircraft: 546 may be affected, by airframe or engine model (OpenAirDocs) - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/7E6230D99B8BD5EC86256A4E0050D8CE.0001 - DRS record last changed: May 30, 2024 - Page: https://openairdocs.org/ad/81-14-02 ## The airworthiness directive 81-14-02 MAULE AIRCRAFT CORPORATION: Amendment 39-4146. Applies to M-4 and to M-5 series airplanes certificated in all categories. M-4 Series. M-4, S/N 4 through 94, 1001 through 1045, 1S through 3S, 1T through 3T, 1C through 11C; M-4-210C, S/N 1001C through 1117C; M-4-220S, S/N 2001S; M-4-220C, S/N 2001C through 2190C; M-4-180C, S/N 3001C through 3006C. M-5 Series. M-5-220C, S/N 5001C through 5057C; M-5-210C, S/N 6001C through 6204C; M-5-235C, S/N 7001C through 7254C; M-5-180C, S/N 8001C and M-5-210TC, S/N 9001C. Compliance is required as indicated, unless already accomplished. To prevent failure of the rudder pedal V-bar and associated structure of the rudder bar, within 25 hours time in service after the effective date of this AD accomplish the following: (a) Visually inspect the rudder pedal V-bar tube for cracks with at least a 10-power magnifying glass. NOTE: Instructions for access to the rudder bar are outlined in Maule Aircraft Corporation Service Bulletin No. 2, dated 2/17/81. (b) If no cracks are found, modify the rudder bar assembly in accordance with the Maule Service Bulletin #2, dated 2/17/81. (c) If a crack is found, prior to further flight accomplish either 1 or 2 below, as appropriate: 1. If the crack is one inch or less in length, install modified rudder bar, P/N 4130F-12, in accordance with the instructions contained in Maule Service Bulletin #2, dated 2/17/81, or stop drill at the end of the crack, weld and reinforce in accordance with the instructions provided in the Maule Service Bulletin #2, dated 2/17/81, and Advisory Circular 43.13-1A, Chapter 2, Aircraft Metal Structure, Section 2, Welding. 2. If the crack exceeds one inch in length, install modified rudder bar, P/N 4130F-12, in accordance with the instructions contained in Maule Service Bulletin #2, dated 2/17/81. (d) Make appropriate maintenance record entry. An equivalent method of compliance may be approved by the Chief, Engineering and Manufacturing Branch, FAA Southern Region. This amendment becomes effective July 1, 1981. ## Affected data sheets (1) (OpenAirDocs) The type certificate data sheets whose models the AD names. - [TCDS 3A23](https://openairdocs.org/tcds/3A23): Maule Aerospace Technology Inc.; names 13 of 50 models: M-4-210C, M-5-235C, M-5-220C, M-4, M-4C, M-5-180C, M-4T, M-5-210TC… ## 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: 546 (546 by airframe model, 0 by engine model) - Makers: Maule 546 Models with the most aircraft: - [Maule M-5-235C](https://openairdocs.org/model/maule-m-5-235c): 181 aircraft (airframe model) - [Maule M-5-210C](https://openairdocs.org/model/maule-m-5-210c): 94 aircraft (airframe model) - [Maule M-4-220C](https://openairdocs.org/model/maule-m-4-220c): 83 aircraft (airframe model) - [Maule M-5-180C](https://openairdocs.org/model/maule-m-5-180c): 57 aircraft (airframe model) - [Maule M-4-210C](https://openairdocs.org/model/maule-m-4-210c): 46 aircraft (airframe model) - [Maule M-4](https://openairdocs.org/model/maule-m-4): 42 aircraft (airframe model) - [Maule M-5-220C](https://openairdocs.org/model/maule-m-5-220c): 27 aircraft (airframe model) - [Maule M-4C](https://openairdocs.org/model/maule-m-4c): 6 aircraft (airframe model) - [Maule M-4-180C](https://openairdocs.org/model/maule-m-4-180c): 4 aircraft (airframe model) - [Maule M-5-210TC](https://openairdocs.org/model/maule-m-5-210tc): 4 aircraft (airframe model) - [Maule M-4S](https://openairdocs.org/model/maule-m-4s): 1 aircraft (airframe model) - [Maule M-4T](https://openairdocs.org/model/maule-m-4t): 1 aircraft (airframe model) All 13 models: https://openairdocs.org/ad/81-14-02/models.md Every aircraft: https://openairdocs.org/ad/81-14-02/aircraft.md ## Related documents - [AC 43.13-1B CHG 1 Ed Update](https://openairdocs.org/ac/43.13-1): Acceptable Methods, Techniques, and Practices—Aircraft Inspection and Repair. Cited as AC 43.13-1A in the AD's requirements --- 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.