Airworthiness directives › 2024-19-06
AD 2024-19-06 Airworthiness Directives; The Boeing Company Airplanes
Models named: 737-8, 737-9. Read the applicability below — it usually turns on serial or part numbers too.
Applicability*9
This AD applies to The Boeing Company Model 737-8 and 737-9 airplanes, certificated in any category, having a line number identified in paragraph 1.A., “Effectivity,” of Boeing Alert Requirements Bulletin 737-30A1083 RB, dated November 18, 2022.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
Except as specified by paragraph (h) of this AD: At the applicable times specified in the “Compliance” paragraph of Boeing Alert Requirements Bulletin 737-30A1083 RB, dated November 18, 2022, do all applicable actions identified in, and in accordance with, the Accomplishment Instructions of Boeing Alert Requirements Bulletin 737-30A1083 RB, dated November 18, 2022. Note 1 to paragraph (g): Guidance for accomplishing the actions required by this AD can be found in Boeing Alert Service Bulletin 737-30A1083, dated November 18, 2022, which is referred to in Boeing Alert Requirements Bulletin 737-30A1083 RB, dated November 18, 2022.
Unsafe condition
This AD was prompted by a Boeing review of the standby power system control unit (SPCU) design that determined a potential single point of failure exists in the SPCU. The FAA is issuing this AD to address a potential single point of failure in the SPCU, which can result in a non-latent loss of the entire battery bus and consequent un-annunciated loss of control and indication of both engine anti-ice (EAI) systems. The unsafe condition, if not addressed, could result in loss of thrust on both engines due to damage from operation in icing conditions without EAI and can result in loss of continued safe flight and landing.
Affected ADs
None.
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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