# AD 79-12-01: Tail-to-Fuselage Attach Tube - 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M-4-220C, M-4-220S, M-4C, M-4S, M-4T, M-5-180C, M-5-210C, M-5-210TC, M-5-220C and 1 more - Effective: June 7, 1979 - Superseded by: Nothing supersedes this AD - Product type: Aircraft, Small airplane - Amendment: 39-3478 - Registered aircraft: 546 may be affected, by airframe or engine model (OpenAirDocs) - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/F226EB40D46B2D8C86256A3800653CCB.0001 - DRS record last changed: May 30, 2024 - Page: https://openairdocs.org/ad/79-12-01 ## The airworthiness directive 79-12-01 MAULE AIRCRAFT CORPORATION: Amendment 39-3478. Applies to certain M-4 and M-5 series aircraft. Serial Numbers are: M-4 Series: 4 to 94, 1001 to 1045, 1S to 3S, 1T to 3T, 1C to 11C; M-4-210C: 1001C to 1117C; M-4-220S: 2001S; M-4-220C: 2001C to 2190C; M-4-180C: 3001C to 3006C; M-5 series: M-5-210C: 6001C to 6206C: M-5-220C: 5001C to 5057C; M-5-235C: 7001C to 7283C; M-5-180C: 8001C to 8004C; M-5-210TC: 9001C, airplanes certificated in all categories. Compliance is required as indicated, unless already accomplished. To prevent failure of the horizontal tail-to-fuselage front attach tube, accomplish the following within 25 hours' time in service after the effective date of this AD, or 60 days after the effective date whichever occurs first: 1. Inspect the horizontal tail-to-fuselage front attach tube in accordance with paragraphs (1) and (5) of Maule Aircraft Corporation Service Bulletin No. 1, dated May 3, 1979, or later revision approved by the Chief, Engineering and Manufacturing Branch, FAA, Southern Region. 2. If cracks are found, obtain replacement parts from Maule Aircraft Corporation and replace in accordance with Advisory Circular (AC) 43.13-1A prior to further flight. 3. Modify the horizontal tail-to-fuselage front attach tube in accordance with paragraphs (3) and (4) of Maule Aircraft Corporation Service Bulletin No. 1, dated May 3, 1979, or later revision approved by the Chief, Engineering and Manufacturing Branch, FAA, Southern Region. 4. Make appropriate maintenance record entry. 5. An equivalent method of compliance may be used if approved by the Chief, Engineering and Manufacturing Branch, FAA, Southern Region. This amendment is effective June 7, 1979. ## 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/79-12-01/models.md Every aircraft: https://openairdocs.org/ad/79-12-01/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.