Airworthiness Directive · Amendment 39-17958 · Hydraulic power
the Boeing Company Airplanes
This AD applies to The Boeing Company Model 767-400ER series airplanes, certificated in any category, as identified in Boeing Special Attention Service Bulletin 767-29-0113, dated May 29, 2013.
We are adopting a new airworthiness directive (AD) for certain The Boeing Company Model 767-400ER series airplanes. This AD was prompted by reports of turbine wheel bursts in the air driven pump (ADP) turbine gearbox assembly (TGA), which resulted in the release of high energy fragments. This AD requires replacing the existing ADP TGA with an improved ADP TGA. We are issuing this AD to prevent fragments from an uncontained turbine wheel burst penetrating the fuselage and striking passengers, or penetrating the wing-to-body fairing and striking ground handling or maintenance personnel, causing serious injury.
Except as required by paragraph (i) of this AD: At the time specified in paragraph 1.E., “Compliance,” of Boeing Special Attention Service Bulletin 767-29-0113, dated May 29, 2013, replace the existing ADP TGA having part number N012000000 or N012000000-1 with an improved ADP TGA having part number N012000000-2 or N012000000-3, in accordance with the Accomplishment Instructions of Boeing Special Attention Service Bulletin 767-29-0113, dated May 29, 2013.
Note 1 to paragraph (g) of this AD: Guidance on modifying an existing ADP TGA so it can be re-identified as part number N012000000-2 or N012000000-3 can be found in Fairchild Controls Service Bulletin N012000000-29-03, Revision 3, dated March 7, 2014.
