Airworthiness Directive · Amendment 39-17417 · Oxygen
Dassault Aviation Airplanes
This AD applies to Dassault Aviation Model Falcon 7X airplanes, certificated in any category, all serial numbers (S/Ns).
We are adopting a new airworthiness directive (AD) for all Dassault Aviation Model FALCON 7X airplanes. This AD requires revising the aircraft flight manual (AFM); performing operational tests of the oxygen mask oxygen assembly; and replacing affected stowage boxes, which terminates the AFM revision and operational tests. This AD was prompted by failure of the flight crew oxygen supply due to a potentially defective flight crew mask oxygen assembly. We are issuing this AD to prevent failure to supply oxygen upon demand to the flight crew in flight in "100%" and "Emergency" modes, which, in an emergency, may result in incapacitation of the flight crew.
You are responsible for having the actions required by this AD performed within the compliance times specified, unless the actions have already been done.
Airplanes equipped with flight crew mask oxygen assembly part number (P/N) MSE30-005-3-8 and a stowage box P/N CSD 30-005-3-8 with S/N 1013 or higher, or serial number below 1013 with the suffix “-A,” are not subject to the requirements of paragraphs (h), (i), and (l) of this AD.
Within 14 days after the effective date of this AD, revise the Normal Procedures and Limitations sections of the Dassault Falcon Aircraft Flight Manual (AFM) to include the statement provided in Figure 1 to paragraph (h) of this AD, and thereafter operate the airplane accordingly. The AFM revision may be done by inserting a copy of this AD into the AFM.
Note 1 to paragraph (h) of this AD: When a statement identical to that in Figure 1 to paragraph (h) of this AD has been included in the Normal Procedures and Limitations sections of the general revisions of the AFM, the general revisions may be inserted into the AFM, and the copy of this AD may be removed from the AFM.
After revising the AFM as required by paragraph (h) of this AD: At the applicable time specified in paragraph (i)(1) or (i)(2) of this AD, do an operational test of the flight crew mask oxygen assembly, using the procedure in the “Quick Donning Oxygen Mask Additional Test” specified in Figure 1 to paragraph (h) of this AD.
(1) For any flight crew mask oxygen assembly that has accumulated less than 50 total flight hours: Do the operational test before each flight.
(2) For any flight crew mask oxygen assembly that has accumulated 50 or more total flight hours: Do the operational test one time, before further flight.
If any operational test specified in paragraph (i) of this AD is not successful: Before further flight, replace the affected stowage box with a serviceable stowage box, in accordance with the Accomplishment Instructions of Dassault Mandatory Service Bulletin 7X-241, dated March 7, 2013, except dispatch of the airplane with the third crew oxygen mask inoperative is allowed as specified in the Master Minimum Equipment List (MMEL) Item 35-3.
For purposes of this AD, a serviceable stowage box has P/N CSD 30-005-3-8 with any S/N 1013 or higher, or any serial number below 1013 with the suffix “-A.”
Except as required by paragraph (j) of this AD, at the applicable time specified in paragraph (l)(1) or (l)(2) of this AD, replace any non-serviceable stowage box with a serviceable stowage box, in accordance with the Accomplishment Instructions of Dassault Mandatory Service Bulletin 7X-241, dated March 7, 2013. Replacement of all affected stowage boxes terminates the requirements of paragraphs (h) and (i) of this AD, and the AFM revision required by paragraph (h) of this AD may be removed from the AFM.
(1) For a stowage box that has accumulated less than 50 total flight hours as of the effective date of this AD: Replace the stowage box within 8 days after the AFM revision required by paragraph (h) of this AD.
(2) For a stowage box that has accumulated 50 or more total flight hours as of the effective date of this AD: Replace the stowage box within 65 days after the AFM revision required by paragraph (h) of this AD.
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
