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FR
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2012-10-03
article
Airworthiness Directives; The Boeing Company Airplanes
Rules and Regulations
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D09002ee1bdcb193b
United States
Department of Transportation
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org
United States Government Agency or Subagency
United States
Federal Aviation Administration
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org
United States Government Agency or Subagency
We are adopting a new airworthiness directive (AD) for certain The Boeing Company Model 737 airplanes. This AD was prompted by a report of a flightcrew not receiving an aural warning during a lack of cabin pressurization event. This AD requires incorporating design changes to improve the reliability of the cabin altitude warning system by installing a redundant cabin altitude pressure switch, replacing the aural warning module (AWM) with a new or reworked AWM, and changing certain wire bundles or connecting certain previously capped and stowed wires as necessary. For certain airplanes, this AD also requires prior or concurrent incorporation of related design changes by modifying the instrument panels, installing light assemblies, modifying the wire bundles, and installing a new circuit breaker, as necessary. We are issuing this AD to prevent the loss of cabin altitude warning, which could delay flightcrew recognition of a lack of cabin pressurization, and could result in incapacitation of the flightcrew due to hypoxia (a lack of oxygen in the body), and consequent loss of control of the airplane.
77 FR 60296
https://www.govinfo.gov/app/details/FR-2012-10-03/2012-23800
2012-23800
fr03oc12-3
RIN 2120-AA64
4910-13-P
Docket No. FAA-2011-1411
Directorate Identifier 2011-NM-074-AD
Amendment 39-17206
AD 2012-19-11
https://www.govinfo.gov/app/details/FR-2012-10-03/2012-23800
https://www.govinfo.gov/content/pkg/FR-2012-10-03/html/2012-23800.htm
https://www.govinfo.gov/content/pkg/FR-2012-10-03/pdf/2012-23800.pdf
Air Transportation
Aircraft
Aviation Safety
Incorporation by Reference
Safety
6 p.
60296
60301
77 FR 60296
Code of Federal Regulations
Title 14 Part 39
14 CFR Part 39
Regulation Identification Number 2120-AA64
RIN 2120-AA64
Airworthiness Directives; The Boeing Company Airplanes; Federal Register Vol. 77, Issue
RULE
2012-23800
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
2012-11-07
Docket No. FAA-2011-1411
Directorate Identifier 2011-NM-074-AD
Amendment 39-17206
AD 2012-19-11
4910-13-P
2012-23800
Final rule.
We are adopting a new airworthiness directive (AD) for certain The Boeing Company Model 737 airplanes. This AD was prompted by a report of a flightcrew not receiving an aural warning during a lack of cabin pressurization event. This AD requires incorporating design changes to improve the reliability of the cabin altitude warning system by installing a redundant cabin altitude pressure switch, replacing the aural warning module (AWM) with a new or reworked AWM, and changing certain wire bundles or connecting certain previously capped and stowed wires as necessary. For certain airplanes, this AD also requires prior or concurrent incorporation of related design changes by modifying the instrument panels, installing light assemblies, modifying the wire bundles, and installing a new circuit breaker, as necessary. We are issuing this AD to prevent the loss of cabin altitude warning, which could delay flightcrew recognition of a lack of cabin pressurization, and could result in incapacitation of the flightcrew due to hypoxia (a lack of oxygen in the body), and consequent loss of control of the airplane.
This AD is effective November 7, 2012.
Francis Smith, Aerospace Engineer, Cabin Safety and Environmental Systems Branch, ANM-150S, FAA, Seattle Aircraft Certification Office, 1601 Lind Avenue SW., Renton, Washington 98057-3356; phone: (425) 917-6596; fax: (425) 917-6590; email: Francis.Smith@faa.gov.
Air Transportation
Aircraft
Aviation Safety
Incorporation by Reference
Safety
Airworthiness Directives:
The Boeing Company Airplanes
,
9-ANM-Seattle-ACO-AMOC-Requests@faa.gov
Francis.Smith@faa.gov
http://www.archives.gov/federal_register/code_of_federal_regulations/ibr_locations.html
http://www.regulations.gov
https://www.myboeingfleet.com
Federal Register
Vol. 77, no. 192
Office of the Federal Register, National Archives and Records Administration
2012-10-03
continuing
daily
deposited
born digital
335 p.
Table of Contents:
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https://www.govinfo.gov/app/details/FR-2012-10-03
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0097-6326
0042-1219
0364-1406
769-004-00000-9
000582072
f:fr03oc12
https://www.govinfo.gov/app/details/FR-2012-10-03
https://www.govinfo.gov/content/pkg/FR-2012-10-03/pdf/FR-2012-10-03.pdf
https://www.govinfo.gov/content/pkg/FR-2012-10-03/xml/FR-2012-10-03.xml
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