# AD 75-17-16: Engine Power Loss - Type: Airworthiness directive - Status: Current - Products: American Champion 7ECA, 7GCAA, 7GCBC, 7KCAB, 8GCBC and 8KCAB - Effective: August 12, 1975 - Superseded by: Nothing supersedes this AD - Product type: Aircraft, Small airplane - Amendment: 39-2309 - Registered aircraft: 3,626 may be affected, by airframe or engine model (OpenAirDocs) - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/D7CB48CE59749DD386256A3400591795.0001 - DRS record last changed: May 30, 2024 - Page: https://openairdocs.org/ad/75-17-16 ## The airworthiness directive 75-17-16 BELLANCA: Amendment 39-2309. Applies to the Bellanca Models 7ECA, 7GCAA, 7GCBC, 7KCAB, 8KCAB, and 8GCBC airplanes as set forth below. Compliance required as indicated, unless previously accomplished. A special flight permit pursuant to FAR 21.197 may be issued to allow ferrying of the aircraft to a facility where the required maintenance can be performed. To prevent possible engine power loss due to fatigue failure of the carburetor alternate air valves, accomplish the following: A). Within the next 10 hours time in service after the effective date of this AD on Models 7ECA (S/N 985-74 thru 1108-75), 7GCAA (S/N 280-74 thru 319-75), 7GCBC (S/N 604- 74 thru 859-75), 7KCAB (S/N 405-74 thru 532-75), 8KCAB (S/N 12074 thru 204-75), 8GCBC (S/N 1-74 thru 181-75), install Bellanca service Kit No. 248A. Bellanca Service Letter No. 118A pertains to this subject. B). Within the next 10 hours time in service after June 25, 1975, on the Models 7ECA (S/N 723-70 thru 984-73), 7GCAA (S/N 205-70 thru 279-73), 7GCBC (S/N 202-70 thru 603-73), 7KCAB (S/N 209-70 thru 404-73), 8KCAB (S/N 4-71 thru 119-73), install Bellanca Service Kit No. 251. Bellanca Service Letter No. 120 applies to this subject. C). At each annual, progressive, or 100-hour inspection as required by Federal Aviation Regulation 91.169, on the Models covered by paragraphs A and B and all subsequent serials of those same models, inspect the alternate air valve for cracks. If any cracks are noted, replace the alternate air valve by installing Bellanca Service Kit 251 on Models 7ECA (S/N 723- 70 thru 984-73), 7GCAA (S/N 205-70 thru 279-73), 7GCBC (S/N 202-70 thru 603-73) 7KCAB (S/N 209-70 thru 404-73), 8KCAB (S/N 4-71 thru 119- 73); Bellanca Service Kit #248A on Models 7ECA (S/N 985-74 and up), 7GCAA (S/N 280-74 and up), 7GCBC (604-74 and up), 7KCAB (405-74 and up), 8KCAB (S/N 120-74 and up), 8GCBC (S/N 1-74 and up). Any equivalent method of compliance with this AD must be approved by the Chief, Engineering and Manufacturing Branch, Great Lakes Region, 2300 E. Devon Avenue, Des Plaines, Illinois, 60018. This Amendment supersedes Amendment 39-2173, 40 F. R. 17138, AD 75-09-02 as amended by Amendment 39-2243, and Amendment 39-2261. This amendment becomes effective August 12, 1975. ## Affected data sheets (2) (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 4 of 22 models: 7KCAB, 7GCAA, 7GCBC, 7ECA - [TCDS A21CE](https://openairdocs.org/tcds/A21CE): American Champion Aircraft Corp.; names 2 of 2 models: 8GCBC, 8KCAB ## 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: 3,626 (3,626 by airframe model, 0 by engine model) - Makers: Bellanca 1,735, American Champion 1,056, Champion 834, Aeronca 1 Models with the most aircraft: - [Bellanca 7GCBC](https://openairdocs.org/model/bellanca-7gcbc): 487 aircraft (airframe model) - [American Champion 8KCAB](https://openairdocs.org/model/american-champion-8kcab): 449 aircraft (airframe model) - [Champion 7ECA](https://openairdocs.org/model/champion-7eca): 419 aircraft (airframe model) - [Bellanca 8KCAB](https://openairdocs.org/model/bellanca-8kcab): 371 aircraft (airframe model) - [Bellanca 7ECA](https://openairdocs.org/model/bellanca-7eca): 347 aircraft (airframe model) - [American Champion 7GCBC](https://openairdocs.org/model/american-champion-7gcbc): 232 aircraft (airframe model) - [Bellanca 7KCAB](https://openairdocs.org/model/bellanca-7kcab): 230 aircraft (airframe model) - [American Champion 8GCBC](https://openairdocs.org/model/american-champion-8gcbc): 218 aircraft (airframe model) - [Bellanca 8GCBC](https://openairdocs.org/model/bellanca-8gcbc): 182 aircraft (airframe model) - [Champion 7KCAB](https://openairdocs.org/model/champion-7kcab): 151 aircraft (airframe model) - [Champion 7GCBC](https://openairdocs.org/model/champion-7gcbc): 144 aircraft (airframe model) - [American Champion 7GCAA](https://openairdocs.org/model/american-champion-7gcaa): 119 aircraft (airframe model) - [Bellanca 7GCAA](https://openairdocs.org/model/bellanca-7gcaa): 118 aircraft (airframe model) - [Champion 7GCAA](https://openairdocs.org/model/champion-7gcaa): 114 aircraft (airframe model) - [American Champion 7ECA](https://openairdocs.org/model/american-champion-7eca): 38 aircraft (airframe model) - [Champion 8KCAB](https://openairdocs.org/model/champion-8kcab): 5 aircraft (airframe model) - [Aeronca 7GCBC](https://openairdocs.org/model/aeronca-7gcbc): 1 aircraft (airframe model) - [Champion 7GCAA (CONV)](https://openairdocs.org/model/champion-7gcaa-conv): 1 aircraft (airframe model) All 19 models: https://openairdocs.org/ad/75-17-16/models.md Every aircraft: https://openairdocs.org/ad/75-17-16/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.