Airworthiness Directive · Amendment 39-22848 · Ice/rain protection system
The Boeing Company Airplanes
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.
The FAA is adopting a new airworthiness directive (AD) for certain The Boeing Company Model 737-8 and Model 737-9 airplanes. This AD was prompted by a Boeing review of the standby power system control unit (SPCU) design where a single point of failure exists internal to the SPCU. This AD requires installing four diodes and changing wire bundles in the P5 panel, as well as performing installation and power tests and applicable on-condition actions. The FAA is issuing this AD to address the unsafe condition on these products.
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.
(1) Where the Compliance Time columns of the table in the “Compliance” paragraph of Boeing Alert Requirements Bulletin 737-30A1083 RB, dated November 18, 2022, uses the phrase “the original issue date of Requirements Bulletin 737-30A1083 RB,” this AD requires using the effective date of this AD.
(2) Where “ACTION 3” in the Action column of the table in the “Compliance” paragraph of Boeing Alert Requirements Bulletin 737-30A1083 RB, dated November 18, 2022, specifies to do applicable corrective actions and repeat the test until the test passes if any test fails, for this AD, the compliance time for those actions is before further flight after accomplishing the test.
The aircraft, engines and makers this AD names, by the model designations in its text. A model listed here may still be outside the AD's serial ranges.
Aircraft
