Airworthiness directives › 2021-13-18
AD 2021-13-18 Airworthiness Directives; The Boeing Company Airplanes
Models named: 737. Read the applicability below — it usually turns on serial or part numbers too.
Applicability*9
This AD applies to all The Boeing Company Model 737 airplanes powered by LEAP-1B engines, certificated in any category.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
For airplanes identified in Boeing Special Attention Requirements Bulletin 737-71-1911 RB, Revision 1, dated September 10, 2020: At the applicable times specified in the “Compliance” paragraph of Boeing Special Attention Requirements Bulletin 737-71-1911 RB, Revision 1, dated September 10, 2020, except as specified by paragraph (h) of this AD, do all applicable actions identified in, and in accordance with, the Accomplishment Instructions of Boeing Special Attention Requirements Bulletin 737-71-1911 RB, Revision 1, dated September 10, 2020. Note 1 to paragraph (g): Guidance for accomplishing the actions required by this AD can be found in Boeing Special Attention Service Bulletin 737-71-1911, Revision 1, dated September 10, 2020, which is referred to in Boeing Special Attention Requirements Bulletin 737-71-1911 RB, Revision 1, dated September 10, 2020.
Unsafe condition
This AD was prompted by reports of inadvertent release of the spring energy of certain spring door opening system (SDOS) actuators. The FAA is issuing this AD to address possible separation of the SDOS actuator and visual obstruction of the SDOS actuator safety marker, which, during maintenance, can cause injury to maintenance personnel or damage to the airplane.
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