{"as_of":"2026-11-06","attribution":"FAA and NTSB data via eFlight Registry (https://eflight.com)","connections":[{"group":"Applies to","items":[{"count":2896,"name":"Boeing 737","note":"","unit":"registered","url":"https://eflight.com/models/boeing/737#airworthiness"}],"relation":"applies to"},{"group":"System","items":[{"count":null,"name":"Cabin, seats and restraints","note":"","unit":"","url":"https://eflight.com/systems/cabin"}],"relation":"about"},{"group":"More","items":[{"count":null,"name":"Every FAA order","note":"","unit":"","url":"https://eflight.com/directives"},{"count":null,"name":"Every aircraft system","note":"","unit":"","url":"https://eflight.com/systems"}],"relation":"see also"}],"graph":"https://eflight.com/graph","graph_index":"https://eflight.com/graph/index.json","license":"https://creativecommons.org/licenses/by/4.0/","node":{"effective":"1988-10-03","faa_document":"https://drs.faa.gov/browse/excelExternalWindow/95C7B630E28C54DF8625695A0070F61F.0001","id":"88-19-04","kind":"AD","name":"Airworthiness directive 88-19-04","published":"","subject":"Cabin Pressure Safety Relief Valves","system":"cabin","type":"directive","url":"https://eflight.com/directives/88-19-04"},"source":"FAA Civil Aviation Registry, FAA airport file, NTSB accident database; assembled by eFlight Registry"}