Airworthiness directives › 2020-03-10
AD 2020-03-10 Airworthiness Directives; The Boeing Company Airplanes
Models named: 737 series, 737-100, -200, -200C, -300, -400, -500 series. Read the applicability below — it usually turns on serial or part numbers too.
Applicability*9
(1) This AD applies to all The Boeing Company Model 737 series airplanes, certificated in any category, except for Model 737-100, -200, -200C, -300, -400, and -500 series airplanes. (2) Installation of Supplemental Type Certificate (STC) ST00830SE does not affect the ability to accomplish the actions required by this AD. Therefore, for airplanes on which STC ST00830SE is installed, a “change in product” alternative method of compliance (AMOC) approval request, per 14 CFR 39.17, is not necessary to comply with the requirements of this AD.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
(1) For airplanes with an original airworthiness certificate or an original export certificate of airworthiness dated on or before the effective date of this AD, except as specified in paragraph (g)(2) of this AD: Within 24 months after the effective date of this AD, do a general visual inspection for discrepancies of fairing panel 194E, wheel well panel 193D, and support structure, and do all applicable related investigative and corrective actions, in accordance with Part 1 and Part 2 of the Accomplishment Instructions of Boeing Special Attention Service Bulletin 737-53-1307, dated January 12, 2012. All applicable related investigative and corrective actions must be done before further flight. Repeat the inspection thereafter at intervals not to exceed 1,000 flight cycles. (2) For airplanes having line numbers 3533 and subsequent that have not altered the type design since the issuance of an original airworthiness certificate or an original export certificate of airworthiness, an external visual inspection of fairing panel 194E and wheel well panel 193D may be used to verify the correct panel configuration, provided it can be determined that fairing panel 194E, wheel well panel 193D, and the support structure have the number and type of attachments specified in the post-reworked configuration of Boeing Special Attention Service Bulletin 737-53-1307, dated January 12, 2012. If the external inspection shows that fairing panel 194E, wheel well panel 193D, and the support structure have the number and type of attachments specified in the post-reworked configuration of Boeing Special Attention Service Bulletin 737-53-1307, dated January 12, 2012, then the repetitive inspections required by paragraph (g)(1) of this AD are terminated. (3) For airplanes having line numbers 3533 and subsequent with an original airworthiness certificate or an original export certificate of airworthiness dated on or before the effective date of this AD: If the initial inspection required by paragraph (g)(1) of this AD shows that fairing panel 194E, wheel well panel 193D, and the support structure have the number and type of attachments specified in the post-reworked configuration of Boeing Special Attention Service Bulletin 737-53-1307, dated January 12, 2012, then the repetitive inspections required by paragraph (g)(1) of this AD are terminated. The requirements of paragraph (i) of this AD continue to apply. (4) Repairs to fairing panel 194E, wheel well panel 193D, or the support structure that do not affect the number or type of fasteners necessary for the post-reworked configuration may be deviated from using accepted methods in accordance with the operator's maintenance or inspection program without obtaining approval of an AMOC, provided the remaining requirements can be done and the airplane can be put back in an airworthy condition.
Unsafe condition
This AD was prompted by reports of separation of lower aft wing-to-body fairing panel 194E (“fairing panel 194E”) during flight, due to worn or damaged nutplates on wheel well panel 193D and support structure. The FAA is issuing this AD to address separation of fairing panel 194E.
Affected ADs
None.
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