# AD 63-22-03: Carburetors - Type: Airworthiness directive - Status: Current - Products: Continental Motors GO-300-A, GO-300-B, GO-300-C, GO-300-D, GO-300-E, GO-300-F, O-470-11, O-470-11-CI, O-470-11B, O-470-11B-CI, O-470-13, O-470-13A and 134 more - Effective: December 2, 1963 - Published: October 30, 1963 - Superseded by: Nothing supersedes this AD - Product type: Appliance - Registered aircraft: 37,005 may be affected, by airframe or engine model (OpenAirDocs) - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/03186ED0B289A91386256A330055BC0C.0001 - DRS record last changed: May 30, 2024 - Page: https://openairdocs.org/ad/63-22-03 ## The airworthiness directive 63-22-03 MARVEL-SCHEBLER: Amdt. 636 Part 507 Federal Register October 30, 1963. Applies to All MA4-5 Carburetors Not Having the One-Piece Combination Primary and Main Venturi and Used on the Following: Continental O-470 Series Engines Installed in Cessna 180 and 182 Series Aircraft; Continental GO-300 Series Engines Installed in Cessna 175 and P172 Series Aircraft; Lycoming O-540 Series Engines Installed in Aero Commander 500 Series Aircraft, Piper PA-23-250 Series Aircraft and Piper PA-24 Series Aircraft; Lycoming O-360 Series Engines Installed in Piper PA-24 Series Aircraft, Beech 95 Series Aircraft, and Mooney Mark 20 or 21 Series Aircraft; and Franklin 6A4-165 Series Engines Installed in Stinson 108 Series Aircraft. Compliance required at next carburetor removal or overhaul of either the carburetor or engine whichever occurs first after the effective date of this AD, on all carburetors not having the one-piece combination primary and main venturi installed. Carburetorshaving the one-piece combination primary and main venturi installed are identified by the letter "V" stamped on the nameplate. The primary venturi may become loose resulting in wear of the primary venturi support legs on the ends contacting the carburetor body and at the retaining clip area. As a result, the retaining clips may become dislodged or dislocated and wear may progress to the point the venturi becomes dislodged or dislocated. This can cause erratic engine operation or complete engine stoppage. To preclude this, accomplish the following: Replace the existing primary and main venturi with a one-piece combination primary and main venturi of the correct part number for the carburetor involved. When accomplished stamp the letter "V" on the carburetor nameplate below the serial number. (Marvel-Schebler Service Bulletin No. A4-63, Lycoming Service Bulletin No. 297, and Continental Motor Service Bulletin No. M63-18 cover this same subject.) This directive effective December 2, 1963. ## Affected data sheets (7) (OpenAirDocs) The type certificate data sheets whose models the AD names. - [TCDS E-286](https://openairdocs.org/tcds/E-286): Lycoming Engines; names 61 of 72 models: O-360-C1C, O-360-C1A, O-360-E2AD, O-360-E2BD, O-360-B1A, O-360-A1A, O-360-A1H6, O-360-A1G6… - [TCDS E-295](https://openairdocs.org/tcds/E-295): Lycoming Engines; names 46 of 47 models: O-540-L3C5D, O-540-J2B5D, O-540-J1B5D, O-540-B2C5, O-540-B1D5, O-540-G2A5, O-540-H2A5, O-540-H1B5D… - [TCDS E-273](https://openairdocs.org/tcds/E-273): Continental Aerospace Technologies, Inc.; names 19 of 21 models: O-470-G-CI, O-470-T, O-470-B-CI, O-470-N, O-470-R, O-470-H, O-470-A, O-470-E… - [TCDS E-269](https://openairdocs.org/tcds/E-269): Continental Aerospace Technologies, Inc.; names 8 of 8 models: O-470-11, O-470-15, O-470-11B-CI, O-470-13, O-470-11-CI, O-470-11B, O-470-4, O-470-13A - [TCDS E-298](https://openairdocs.org/tcds/E-298): Continental Aerospace Technologies, Inc.; names 6 of 6 models: GO-300-A, GO-300-F, GO-300-D, GO-300-E, GO-300-C, GO-300-B - [TCDS E-238](https://openairdocs.org/tcds/E-238): Franklin Sp. z.o.o.; names 3 of 7 models: 6A4-165-B4, 6A4-165-B6, 6A4-165-B3 - [TCDS E-281](https://openairdocs.org/tcds/E-281): Continental Aerospace Technologies, Inc.; names 1 of 2 models: O-470-2 ## 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: 37,005 (0 by airframe model, 37,005 by engine model) - Makers: Cessna 15,902, Piper 10,349, Mooney 1,602, Beech 1,278, Robinson Helicopter 872, Aviat 708, Stinson 683, Grumman American Avn. 585, Maule 510, Bellanca 251 Models with the most aircraft: - [Continental O-470 series](https://openairdocs.org/engine/continental-o-470-series): 12,779 aircraft (engine model) - [Lycoming O&VO-360 series](https://openairdocs.org/engine/lycoming-o-vo-360-series): 11,931 aircraft (engine model) - [Lycoming 0-540 series](https://openairdocs.org/engine/lycoming-0-540-series): 5,228 aircraft (engine model) - [Lycoming O-360 series](https://openairdocs.org/engine/lycoming-o-360-series): 1,023 aircraft (engine model) - [Lycoming 0-360-A1D](https://openairdocs.org/engine/lycoming-0-360-a1d): 968 aircraft (engine model) - [Continental GO-300 series](https://openairdocs.org/engine/continental-go-300-series): 808 aircraft (engine model) - [Franklin 6A4165 series](https://openairdocs.org/engine/franklin-6a4165-series): 770 aircraft (engine model) - [Lycoming O-360-A1A](https://openairdocs.org/engine/lycoming-o-360-a1a): 601 aircraft (engine model) - [Lycoming O-360-A4M](https://openairdocs.org/engine/lycoming-o-360-a4m): 418 aircraft (engine model) - [Lycoming O-360-A1P](https://openairdocs.org/engine/lycoming-o-360-a1p): 302 aircraft (engine model) - [Lycoming O-540-F1B5](https://openairdocs.org/engine/lycoming-o-540-f1b5): 299 aircraft (engine model) - [Lycoming O-360-J2A](https://openairdocs.org/engine/lycoming-o-360-j2a): 255 aircraft (engine model) - [Lycoming O-360-C1G](https://openairdocs.org/engine/lycoming-o-360-c1g): 141 aircraft (engine model) - [Continental O-470R](https://openairdocs.org/engine/continental-o-470r): 107 aircraft (engine model) - [Lycoming O-360-A1H6](https://openairdocs.org/engine/lycoming-o-360-a1h6): 106 aircraft (engine model) - [Lycoming O-360-C4P](https://openairdocs.org/engine/lycoming-o-360-c4p): 102 aircraft (engine model) - [Lycoming O-360-A1D](https://openairdocs.org/engine/lycoming-o-360-a1d): 89 aircraft (engine model) - [Lycoming O-360-A4A](https://openairdocs.org/engine/lycoming-o-360-a4a): 63 aircraft (engine model) - [Lycoming 0-360-C1F](https://openairdocs.org/engine/lycoming-0-360-c1f): 62 aircraft (engine model) - [Continental O-470-U](https://openairdocs.org/engine/continental-o-470-u): 56 aircraft (engine model) All 104 models: https://openairdocs.org/ad/63-22-03/models.md Every aircraft: https://openairdocs.org/ad/63-22-03/aircraft.md Its text cites no advisory circulars or STCs. ## NTSB investigations that cite this AD (1) From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. - [NTSB FTW04FA232](https://openairdocs.org/ntsb/FTW04FA232), Sep 4, 2004: Fairchild M-62A-3 (N79307), Corsicana, TX, substantial damage, 2 fatal. Probable cause: The loss of engine power due to a faulty carburetor and the pilot's failure to maintain airspeed sufficient for flight resulting in an inadvertent stall/spin during the forced landing after takeoff. --- 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.