Airworthiness directives › 2022-05-04
AD 2022-05-04 Airworthiness Directives; The Boeing Company Airplanes
Models named: 737-100, -200, -200C, -300, -400, -500, -600, -700, -700C, -800. Read the applicability below — it usually turns on serial or part numbers too.
Applicability*9
This AD applies to all The Boeing Company Model 737-100, -200, -200C, -300, -400, -500, -600, -700, -700C, -800, -900, and -900ER series airplanes, certificated in any category, except for Model 737-200 and -200C series airplanes equipped with an SP-77 flight control system.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
(1) Within 2 days after the effective date of this AD: Revise the Limitations Section of the existing AFM to include the information specified in figure 1 to paragraph (g)(1) of this AD. This may be done by inserting a copy of figure 1 to paragraph (g)(1) of this AD into the Limitations Section of the existing AFM. BILLING CODE 4910-13-P ER24FE22.043 (2) Within 2 days after the effective date of this AD: Revise the Operating Procedures Section of the existing AFM to include the information specified in figure 2 to paragraph (g)(2) of this AD or figure 3 to paragraph (g)(2) of this AD, as applicable. This may be done by inserting a copy of figure 2 to paragraph (g)(2) of this AD or figure 3 to paragraph (g)(2) of this AD, as applicable, into the Operating Procedures Section of the existing AFM. ER24FE22.044 ER24FE22.045 Note 1 to paragraph (g)(2): Guidance for accomplishing the actions required by paragraph (g)(2) of this AD can be found in Boeing Multi Operator Message MOM-MOM-22-0041-01B(R1), dated February 1, 2022; Boeing Multi Operator Message MOM-MOM-22-0017-01B(R2), dated February 1, 2022; Boeing Flight Crew Operations Manual Bulletin TBCN-28, “Radio Altimeter Anomalies due to 5G C-Band Wireless Broadband Interference in the United States,” dated January 17, 2022; Boeing Flight Crew Operations Manual Bulletin TBC-30 R1, “Radio Altimeter Anomalies due to 5G C-Band Wireless Broadband Interference in the United States,” dated February 4, 2022; Boeing Flight Crew Operations Manual Bulletin TBCE-32 R1, “Radio Altimeter Anomalies due to 5G C-Band Wireless Broadband Interference in the United States,” dated February 4, 2022; and Boeing Flight Crew Operations Manual Bulletin TBC-117 R1, “Radio Altimeter Anomalies due to 5G C-Band Wireless Broadband Interference in the United States,” dated February 4, 2022.
Unsafe condition
This AD was prompted by a determination that radio altimeters cannot be relied upon to perform their intended function if they experience interference from wireless broadband operations in the 3.7-3.98 GHz frequency band (5G C-Band), and a determination that, during approach, landings, and go-arounds, as a result of this interference, certain airplane systems may not properly function, resulting in increased flightcrew workload while on approach with the flight director, autothrottle, or autopilot engaged. The FAA is issuing this AD to address 5G C-Band interference that could result in increased flightcrew workload and could lead to reduced ability of the flightcrew to maintain safe flight and landing of 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