Airworthiness Directive · Amendment 39-22911 · Hydraulic power
The Boeing Company Airplanes
This AD applies to The Boeing Company Model 757-200, -200PF, -200CB, and -300 series airplanes, certificated in any category, and identified in Boeing Alert Requirements Bulletin 757-29A0071 RB, dated November 16, 2023.
The FAA is adopting a new airworthiness directive (AD) for certain The Boeing Company Model 757 airplanes. This AD was prompted by reports of several occurrences of a power transfer unit (PTU) control valve that failed to open when commanded. This AD requires installing new relays and changing certain wire bundles leading to the PTU control valve. 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 757-29A0071 RB, dated November 16, 2023, do all applicable actions identified in, and in accordance with, the Accomplishment Instructions of Boeing Alert Requirements Bulletin 757-29A0071 RB, dated November 16, 2023.
Note 1 to paragraph (g): Guidance for accomplishing the actions required by this AD can be found in Boeing Alert Service Bulletin 757-29A0071, dated November 16, 2023, which is referred to in Boeing Alert Requirements Bulletin 757-29A0071 RB, dated November 16, 2023.
(1) Where the Compliance Time column of the tables in the “Compliance” paragraph of Boeing Alert Requirements Bulletin 757-29A0071 RB, dated November 16, 2023, uses the phrase “the Original Issue date of Requirements Bulletin 757-29A0071 RB,” this AD requires using the effective date of this AD.
(2) Where the figures in the Accomplishment Instructions of Boeing Alert Requirements Bulletin 757-29A0071 RB, dated November 16, 2023, specify certain positions on the P33 panel and disconnect bracket AD0880 or AD0881 for installing the connectors, this AD allows any open position on the P33 panel or disconnect bracket AD0880 or AD0881 for installing the connectors.
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
