Airworthiness Directive · Amendment 39-19216 · Oxygen
The Boeing Company Airplanes
This AD applies to all The Boeing Company Model 787-8 and 787-9 airplanes, certificated in any category.
We are adopting a new airworthiness directive (AD) for all The Boeing Company Model 787-8 and 787-9 airplanes. This AD was prompted by a flight test report indicating that the crew oxygen masks in the flight deck did not deploy correctly. This AD requires an inspection at four locations in the flight deck to determine whether any crew oxygen mask having a certain part number is installed, and replacement of affected crew oxygen masks. We are issuing this AD to address the unsafe condition on these products.
For airplanes with an original certificate of airworthiness or original export certificate of airworthiness issued on or before the effective date of this AD: Within 72 months after the effective date of this AD, do an inspection to determine whether any crew oxygen mask having part number (P/N) MLD20-626-1 is installed at the four locations identified in Boeing Service Bulletin B787-81205-SB350007-00, Issue 001, dated May 9, 2017. A review of airplane maintenance records is acceptable in lieu of this inspection if the part number of the crew oxygen mask can be conclusively determined from that review. If any crew oxygen mask having P/N MLD20-626-1 is found installed, within 72 months after the effective date of this AD, do all applicable actions identified as “RC” (required for compliance) in, and in accordance with, the Accomplishment Instructions of Boeing Service Bulletin B787-81205-SB350007-00, Issue 001, dated May 9, 2017.
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
