The U.S. aircraft register, updated daily
FAA orders · airworthiness directive · current

2000-23-10: Donning Oxygen Masks

FAA order 2000-23-10 is an airworthiness directive in force since December 27, 2000. The FAA's subject line: Donning Oxygen Masks. System: emergency equipment.

What it applies to as the FAA lists it

Kind of product
Aircraft
Makes
Lockheed Martin Corporation
Models
188A, 188C

Dates and paperwork

In force since
December 27, 2000
Published
November 22, 2000 (signed November 6, 2000)
Docket
2000-NM-265-AD
Status
Current
The FAA's document
Read the order on the FAA's site

The FAA's summary their words, unchanged

This amendment adopts a new airworthiness directive (AD), applicable to all Lockheed Model 188A and 188C series airplanes, that requires a revision of the Airplane Flight Manual (AFM) to add procedures for donning the flightcrew oxygen masks when the cabin altitude warning horn is activated. The actions specified by this AD are intended to prevent incapacitation of the flightcrew as a result of lack of oxygen and consequent loss of control of the airplane due to absence of AFM procedures for donning the flightcrew oxygen masks when the cabin altitude warning horn is activated.

The order itself the regulatory text, as published

Show the full text (2,157 characters)
2000-23-10 LOCKHEED: Amendment 39-11980. Docket 2000-NM-265-AD. Applicability: All Model 188A and 188C series airplanes, certificated in any category. Compliance: Required as indicated, unless accomplished previously. To prevent incapacitation of the flightcrew and consequent loss of control of the airplane due to delays in donning oxygen masks in response to the activation of the cabin altitude warning horn; accomplish the following: Revision to the Airplane Flight Manual (a) Within 90 days after the effective date of this AD, revise the Emergency Procedures Section of the FAA-Approved Airplane Flight Manual (AFM) to include the following (which may be accomplished by inserting a copy of this AD in the AFM): "Low Cabin Pressure Warning Light Comes On and Horn Starts Blowing a. Oxygen Masks - Don. Select 100% oxygen. b. If conditions dictate, initiate emergency descent. c. Check cabin differential pressure gage. 1. If differential pressure is below 13.34 + 0.30 in. Hg, lower cabin altitude selector wheel. 2. If differential pressure is at 13.34 + 0.30 in. Hg, descend to lower aircraft altitude. Note: Warning horn can be silenced with cabin altitude warning horn switch." Alternative Methods of Compliance (b) An alternative method of compliance or adjustment of the compliance time that provides an acceptable level of safety may be used if approved by the Manager, Atlanta Aircraft Certification Office (ACO), FAA. Operators shall submit their requests through an appropriate FAA Principal Maintenance Inspector, who may add comments and then send it to the Manager, Atlanta ACO. NOTE 1: Information concerning the existence of approved alternative methods of compliance with this AD, if any, may be obtained from the Atlanta ACO. Special Flight Permit (c) Special flight permits may be issued in accordance with sections 21.197 and 21.199 of the Federal Aviation Regulations (14 CFR 21.197 and 21.199) to operate the airplane to a location where the requirements of this AD can be accomplished. Effective Date (d) This amendment becomes effective on December 27, 2000.

Source: FAA Dynamic Regulatory System, airworthiness directives. The FAA's document is the authority; the register counts are this site's, from the FAA register of November 6, 2026. Connections as data: /graph/directive/2000-23-10.json · aircraft systems.