{"as_of":"2026-11-11","attribution":"FAA and NTSB data via eFlight Registry (https://eflight.com)","connections":[{"group":"Design","items":[{"count":1345,"name":"Maule","note":"","unit":"aircraft on the register","url":"https://eflight.com/makers/maule"},{"count":83,"name":"Maule M-4-220C","note":"","unit":"registered","url":"https://eflight.com/models/maule/m-4?variant=M-4-220C"},{"count":46,"name":"Maule M-4-210C","note":"","unit":"registered","url":"https://eflight.com/models/maule/m-4?variant=M-4-210C"},{"count":42,"name":"Maule M-4","note":"","unit":"registered","url":"https://eflight.com/models/maule/m-4?variant=M-4"},{"count":12,"name":"Maule M-4-210","note":"","unit":"registered","url":"https://eflight.com/models/maule/m-4?variant=M-4-210"},{"count":11,"name":"Maule M-4-180V","note":"","unit":"registered","url":"https://eflight.com/models/maule/m-4?variant=M-4-180V"},{"count":6,"name":"Maule M-4C","note":"","unit":"registered","url":"https://eflight.com/models/maule/m-4?variant=M-4C"},{"count":null,"name":"4 more versions","note":"","unit":"","url":"https://eflight.com/models/maule/m-4#versions"},{"count":null,"name":"Built of steel tube and fabric","note":"Welded steel-tube fuselage under fabric; metal wing structure.","unit":"","url":"https://eflight.com/materials/steel-fabric"}],"relation":"made by"},{"group":"Engines","items":[{"count":48,"name":"Continental IO-360 series","note":"300 hp","unit":"of these aircraft","url":"https://eflight.com/engines/continental-io-360-series"},{"count":47,"name":"Franklin 6V 350 series","note":"235 hp","unit":"of these aircraft","url":"https://eflight.com/engines/franklin-6v-350-series"},{"count":47,"name":"Continental O-300 series","note":"145 hp","unit":"of these aircraft","url":"https://eflight.com/engines/continental-o-300-series"},{"count":19,"name":"Franklin 6A-350 series","note":"235 hp","unit":"of these aircraft","url":"https://eflight.com/engines/franklin-6a-350-series"},{"count":12,"name":"Franklin 6A&6V335 series","note":"210 hp","unit":"of these aircraft","url":"https://eflight.com/engines/franklin-6a-6v335-series"}],"relation":"powered by"},{"group":"Where they are","items":[{"count":39,"name":"Alaska","note":"","unit":"of these aircraft","url":"https://eflight.com/states/AK"},{"count":15,"name":"Texas","note":"","unit":"of these aircraft","url":"https://eflight.com/states/TX"},{"count":12,"name":"Minnesota","note":"","unit":"of these aircraft","url":"https://eflight.com/states/MN"},{"count":11,"name":"California","note":"","unit":"of these aircraft","url":"https://eflight.com/states/CA"},{"count":10,"name":"Idaho","note":"","unit":"of these aircraft","url":"https://eflight.com/states/ID"}],"relation":"registered in"},{"group":"Biggest operators","items":[{"count":2,"name":"Spearhead Aviation INC","note":"","unit":"of these aircraft","url":"https://eflight.com/search?q=Spearhead Aviation INC"},{"count":1,"name":"Yeager and CO INC","note":"","unit":"of these aircraft","url":"https://eflight.com/search?q=Yeager and CO INC"},{"count":1,"name":"West Coast Resources INC","note":"","unit":"of these aircraft","url":"https://eflight.com/search?q=West Coast Resources INC"},{"count":1,"name":"Triple W Metal Building Construction LLC","note":"","unit":"of these aircraft","url":"https://eflight.com/search?q=Triple W Metal Building Construction LLC"},{"count":1,"name":"Tejas Flying Services LLC","note":"","unit":"of these aircraft","url":"https://eflight.com/search?q=Tejas Flying Services LLC"}],"relation":"owned by"},{"group":"Record","items":[{"count":92,"name":"NTSB accidents and incidents involving the M-4","note":"7 fatal","unit":"cases since 1982","url":"https://eflight.com/models/maule/m-4#accidents"},{"count":7,"name":"FAA filings this year on these aircraft","note":"7 bill of sale","unit":"filings","url":""}],"relation":"involved in"},{"group":"Airworthiness","items":[{"count":21,"name":"FAA orders naming the M-4","note":"","unit":"airworthiness directives","url":"https://eflight.com/models/maule/m-4#airworthiness"},{"count":13,"name":"Failure reports filed on the M-4","note":"","unit":"reports since 1995","url":"https://eflight.com/models/maule/m-4#airworthiness"},{"count":206,"name":"Approved modifications for the M-4","note":"","unit":"supplemental type certificates","url":"https://eflight.com/models/maule/m-4#airworthiness"}],"relation":"subject to"},{"group":"Analytics","items":[{"count":null,"name":"Accidents by model, with rates per thousand registered","note":"","unit":"","url":"https://eflight.com/analytics/accidents-by-model"},{"count":null,"name":"The fleet by kind, state and age","note":"","unit":"","url":"https://eflight.com/analytics/fleet"},{"count":null,"name":"Biggest makers and model families","note":"","unit":"","url":"https://eflight.com/analytics/makers"}],"relation":"compared in"}],"graph":"https://eflight.com/graph","graph_index":"https://eflight.com/graph/index.json","license":"https://creativecommons.org/licenses/by/4.0/","node":{"built_of":{"material":"steel-fabric","name":"steel tube and fabric","note":"Welded steel-tube fuselage under fabric; metal wing structure."},"id":"maule/m-4","name":"Maule M-4","registered":207,"type":"model","url":"https://eflight.com/models/maule/m-4","versions":10},"source":"FAA Civil Aviation Registry, FAA airport file, NTSB accident database; assembled by eFlight Registry"}
