# AD 49-11-02: Wing Attach Fitting - Type: Airworthiness directive - Status: Current - Products: American Champion 11AC, 11BC, 11CC, 7AC, 7BCM (Army L-16A), S11AC and S7AC - Superseded by: Nothing supersedes this AD - Product type: Aircraft, Small airplane - Registered aircraft: 3,047 may be affected, by airframe or engine model (OpenAirDocs) - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/36692C2CDC017AB986256A380052B24F.0001 - DRS record last changed: May 30, 2024 - Page: https://openairdocs.org/ad/49-11-02 ## The airworthiness directive 49-11-02 AERONCA: Applies to Serial Numbers S7AC and 7AC-1 to 7AC-7170, Inclusive; 7BCM-1 to 7BCM-339, Inclusive; 11CC-1 to -150, Inclusive; and All S11AC, 11AC and 11BC Serial Numbers. Compliance required at next periodic inspection but not later than May 1, 1949. To prevent failure of the rear fuselage-wing attachment fitting, reinforcement is to be accomplished by either of the following methods: 1. Cut on both sides of the rear spar fuselage carry through tube, at each end, a vertical slot 1/4 inch long. Insert a 5/8 inch by 0.083 (or heavier wall) 4130 steel, square or round tube having a minimum length of 2 1/2 inches and weld both sides of slot top and bottom of tube. Drill and ream bolt hole 0.250 plus or minus .001. 2. Insert in each rear spar fuselage wing attachment fitting, on both sides of airplane, a 5/8 inch by 0.083 (or heavier wall) 4130 steel tube having a minimum length of 4 5/8 inches. The insert tube should have a 0.250 plus or minus .001hole drilled 9/16 inch from outer end of tube, and reamed prior to installation. Bolt insert tube in fitting, then drill two vertical 0.250 plus or minus .001 holes through the fuselage carry through tube and the insert tube at 3 and 4 inches, respectively, from end of fitting. Four AN 4-11A bolts and AN 365/428 nuts or equivalent are required to bolt in the two insert tubes. 3. Insert through the entire length of the rear spar fuselage carry through tube a 5/8 inch by 0.083 (or heavier wall) 4130 round or square tube. The insert tube should have a hole drilled and reamed 0.250 plus or minus .001, 9/16 inch from each end of the tube to line up with the original bolt holes. The insert tube should be secured to the fuselage carry through tube by means of one AN 4-11A bolt and AN 365-428 nut or equivalent through both tubes anywhere between the longerons (drill and ream 0.250, plus or minus .001) or by welding both ends of the tubes together. Airplanes having the 5/8 inch by .065 reinforcement tube installed prior to the issuance of this revision need not change to the .083 wall tube. (Aeronca Service Helps and Hints No. 43 covers this same subject.) This supersedes AD's 47-50-01 and 49-02-03. ## Affected data sheets (3) (OpenAirDocs) The type certificate data sheets whose models the AD names. - [TCDS A-759](https://openairdocs.org/tcds/A-759): American Champion Aircraft Corp.; names 3 of 22 models: 7AC, S7AC, 7BCM (Army L-16A) - [TCDS A-761](https://openairdocs.org/tcds/A-761): American Champion Aircraft Corp.; names 3 of 4 models: 11BC, S11AC, 11AC - [TCDS A-796](https://openairdocs.org/tcds/A-796): American Champion Aircraft Corp.; names 1 of 2 models: 11CC ## 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: 3,047 (3,047 by airframe model, 0 by engine model) - Makers: Aeronca 2,803, Champion 239, American Champion 2, Aeronca/Miller/Delaney 1, Aeronca/Obrien 1, Aeronca/Vaughn 1 Models with the most aircraft: - [Aeronca 7AC](https://openairdocs.org/model/aeronca-7ac): 1,878 aircraft (airframe model) - [Aeronca 11AC](https://openairdocs.org/model/aeronca-11ac): 603 aircraft (airframe model) - [Aeronca 7BCM](https://openairdocs.org/model/aeronca-7bcm): 175 aircraft (airframe model) - [Champion 7AC](https://openairdocs.org/model/champion-7ac): 144 aircraft (airframe model) - [Aeronca 11CC](https://openairdocs.org/model/aeronca-11cc): 72 aircraft (airframe model) - [Aeronca 11BC](https://openairdocs.org/model/aeronca-11bc): 65 aircraft (airframe model) - [Champion AERONCA 7AC](https://openairdocs.org/model/champion-aeronca-7ac): 58 aircraft (airframe model) - [Champion 7BCM](https://openairdocs.org/model/champion-7bcm): 19 aircraft (airframe model) - [Champion AERONCA 7BCM](https://openairdocs.org/model/champion-aeronca-7bcm): 17 aircraft (airframe model) - [Aeronca S11AC](https://openairdocs.org/model/aeronca-s11ac): 6 aircraft (airframe model) - [Aeronca S7AC](https://openairdocs.org/model/aeronca-s7ac): 3 aircraft (airframe model) - [American Champion 7AC](https://openairdocs.org/model/american-champion-7ac): 2 aircraft (airframe model) - [Aeronca/Obrien 7AC](https://openairdocs.org/model/aeronca-obrien-7ac): 1 aircraft (airframe model) - [Aeronca CHAMPION 7BCM](https://openairdocs.org/model/aeronca-champion-7bcm): 1 aircraft (airframe model) - [Aeronca/Miller/Delaney 11AC](https://openairdocs.org/model/aeronca-miller-delaney-11ac): 1 aircraft (airframe model) - [Aeronca/Vaughn 11CC](https://openairdocs.org/model/aeronca-vaughn-11cc): 1 aircraft (airframe model) - [Champion 11BC](https://openairdocs.org/model/champion-11bc): 1 aircraft (airframe model) All 17 models: https://openairdocs.org/ad/49-11-02/models.md Every aircraft: https://openairdocs.org/ad/49-11-02/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.