Airworthiness directives › 2015-21-11
AD 2015-21-11 Airworthiness Directives; The Boeing Company Airplanes
Models named: 737-100, -200, -200C, -300, -400, -500 series, 737-600, -700, -700C, -800. Read the applicability below — it usually turns on serial or part numbers too.
Applicability*9
This AD applies to The Boeing Company airplanes, certificated in any category, as identified in paragraphs (c)(1) and (c)(2) of this AD. (1) Model 737-100, -200, -200C, -300,-400, and -500 series airplanes, as identified in Boeing Special Attention Service Bulletin 737-21-1164, Revision 2, dated August 23, 2013. (2) Model 737-600, -700, -700C, -800,-900, and -900ER series airplanes, as identified in Boeing Special Attention Service Bulletin 737-21-1165, Revision 3, dated July 16, 2014.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
This paragraph restates the actions required by paragraph (g) of AD 2015-16-01, Amendment 39-18226 (80 FR 48013, August 11, 2015), with removal of the limitation to use certain service information from paragraph (g)(2) of this AD. Within 72 months after November 7, 2012 (the effective date of AD 2012-19-11, Amendment 39-17206 (77 FR 60296, October 3, 2012)), install a redundant cabin altitude pressure switch, replace the aural warning module (AWM) with a new or reworked AWM, and change certain wire bundles or connect certain capped and stowed wires, as applicable, in accordance with the Accomplishment Instructions of the applicable service information in paragraphs (g)(1) and (g)(2) of this AD; except as provided by paragraph (k)(1) of this AD. (1) Boeing Special Attention Service Bulletin 737-21-1164, Revision 1, dated May 17, 2012; or Boeing Special Attention Service Bulletin 737-21-1164, Revision 2, dated August 23, 2013 (for Model 737-100, -200, -200C, -300, -400, and -500 series airplanes). As of September 15, 2015 (the effective date of AD 2015-16-01, Amendment 39-18226 (80 FR 48013, August 11, 2015)), use Boeing Special Attention Service Bulletin 737-21-1164, Revision 2, dated August 23, 2013, for the actions specified in paragraph (g) of this AD. (2) Boeing Special Attention Service Bulletin 737-21-1165, Revision 1, dated July 16, 2010, as revised by Boeing Special Attention Service Bulletin 737-21-1165, Revision 2, dated April 30, 2012; or Boeing Special Attention Service Bulletin 737-21-1165, Revision 3, dated July 16, 2014 (for Model 737-600, -700, -700C, -800, -900, and -900ER series airplanes).
Unsafe condition
This AD was prompted by the report of a flightcrew not receiving an aural warning during a lack of cabin pressurization event. 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.
Affected ADs
This AD replaces AD 2015-16-01, Amendment 39-18226 (80 FR 48013, August 11, 2015).
Read the original on the Federal Register →
You just looked this one up by hand
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The directive text above is reproduced from the Federal Register, a work of the United States government and in the public domain. The separation into applicability, compliance and required actions is TrackAD's.*1