{"as_of":"2026-10-23","attribution":"FAA and NTSB data via eFlight Registry (https://eflight.com)","connections":[{"group":"Design","items":[{"count":35,"name":"Grumman G-21","note":"","unit":"registered","url":"https://eflight.com/models/grumman/g-21"},{"count":442,"name":"Grumman","note":"","unit":"aircraft on the register","url":"https://eflight.com/makers/grumman"},{"count":null,"name":"Built of aluminium","note":"as the model family is built; the register does not record it per aircraft","unit":"","url":"https://eflight.com/materials/aluminium"}],"relation":"is a"},{"group":"Engine","items":[{"count":1593,"name":"Pratt & Whitney R-985 series","note":"450 hp","unit":"aircraft with this engine series","url":"https://eflight.com/engines/pratt-whitney-r-985-series"}],"relation":"powered by"},{"group":"Owner","items":[{"count":1,"name":"Stick and Rudder Aviation INC","note":"","unit":"aircraft registered to this organisation","url":"https://eflight.com/search?q=Stick and Rudder Aviation INC"}],"relation":"owned by"},{"group":"Place","items":[{"count":348,"name":"Middletown, DE","note":"","unit":"aircraft registered in this town","url":""},{"count":null,"name":"Summit Airport","note":"EVY","unit":"","url":"https://eflight.com/airports/EVY"},{"count":10952,"name":"Delaware","note":"","unit":"aircraft registered","url":"https://eflight.com/states/DE"}],"relation":"registered in"},{"group":"Record","items":[{"count":null,"name":"No NTSB accident or incident record under this tail number","note":"","unit":"","url":"https://eflight.com/aircraft/N121SR#records-check"}],"relation":"involved in"},{"group":"Airworthiness","items":[{"count":10,"name":"FAA orders naming the Grumman G-21","note":"","unit":"airworthiness directives","url":"https://eflight.com/models/grumman/g-21#airworthiness"},{"count":40,"name":"Approved modifications for the Grumman G-21","note":"","unit":"supplemental type certificates","url":"https://eflight.com/models/grumman/g-21#airworthiness"},{"count":80,"name":"Failure reports on the Pratt & Whitney R-985 series","note":"","unit":"reports since 1995","url":"https://eflight.com/engines/pratt-whitney-r-985-series#airworthiness"},{"count":null,"name":"Report filed on this aircraft: Control Module, failed","note":"2007-01-21","unit":"","url":"https://eflight.com/systems/electrical"}],"relation":"subject to"},{"group":"Analytics","items":[{"count":null,"name":"Accident history of the Grumman G-21","note":"","unit":"","url":"https://eflight.com/models/grumman/g-21#accidents"},{"count":null,"name":"Accidents by model, with rates per thousand registered","note":"","unit":"","url":"https://eflight.com/analytics/accidents-by-model"}],"relation":"compared in"},{"group":"Live","items":[{"count":null,"name":"Where N121SR is now","note":"","unit":"","url":"https://eflight.com/live?q=N121SR"}],"relation":"seen at"}],"graph":"https://eflight.com/graph","graph_index":"https://eflight.com/graph/index.json","license":"https://creativecommons.org/licenses/by/4.0/","node":{"built_of":{"inherited_from_model":true,"material":"aluminium","name":"aluminium","note":null},"id":"N121SR","maker":"Grumman","model":"G-21A","name":"Grumman G-21A N121SR","state":"DE","type":"aircraft","url":"https://eflight.com/aircraft/N121SR","year_built":1940},"source":"FAA Civil Aviation Registry, FAA airport file, NTSB accident database; assembled by eFlight Registry"}