Airworthiness Directive · Amendment 39-18986 · Landing gear
Dassault Aviation Airplanes
This AD applies to Dassault Aviation Model MYSTERE-FALCON 50 airplanes and FALCON 2000 airplanes, certificated in any category, all serial numbers.
Note 1 to paragraph (c) of this AD: Model MYSTERE-FALCON 50 airplanes include all commercial variants, including F50EX airplanes.
We are adopting a new airworthiness directive (AD) for all Dassault Aviation Model MYSTERE-FALCON 50 airplanes and FALCON 2000 airplanes. This AD was prompted by a report indicating that during ground maintenance, a Model FALCON 2000 airplane experienced a loss of hydraulic pressure affecting both hydraulic systems due to damage to both brake hoses on the main landing gear (MLG). This AD requires an inspection for certain brake hoses, installation of protective wraps or installation of certain brake hoses, and replacement of certain brake hoses. We are issuing this AD to address the unsafe condition on these products.
Within 9 months after the effective date of this AD, inspect the brake hoses to identify whether any brake hose having part number (P/N) AE705317-1 or P/N 00-200-1268 is installed. A review of airplane maintenance records is acceptable in lieu of this inspection if the part number of the brake hose can be conclusively determined from that review.
If, during the inspection required by paragraph (g) of this AD, it is determined that any brake hose having P/N AE705317-1 or P/N 00-200-1268 is installed, within 9 months after the effective date of this AD, do the actions specified in paragraph (h)(1) or (h)(2) of this AD.
(1) Install protective wraps on the brake hoses, in accordance with the Accomplishment Instructions of Dassault Service Bulletin F50-510, Revision 2, dated December 20, 2012; or Dassault Service Bulletin F2000-382, Revision 2, dated May 12, 2011; as applicable.
(2) Install brake hoses having P/N 00-200-1534 that are fitted with Dacron sleeves, in accordance with the Accomplishment Instructions of Dassault Service Bulletin F50-518, dated April 14, 2011; or Dassault Service Bulletin F2000-368, dated May 29, 2009; as applicable.
Note 2 to paragraphs (h)(2) and (i) of this AD: Dassault Service Bulletin F50-518, dated April 14, 2011, refers to Messier-Dowty Service Bulletin C23791-32-062, dated February 22, 2011; and Dassault Service Bulletin F2000-368, dated May 29, 2009, refers to Messier-Dowty Service Bulletin D23345-32-020, dated May 14, 2009; as additional sources of guidance for doing the replacement.
Within 6,000 flight cycles, or within 149 months, whichever occurs first after the effective date of this AD: Replace brake hoses having P/N AE705317-1 and P/N 00-200-1268 with brake hoses having P/N 00-200-1534 that are fitted with Dacron sleeves, in accordance with the Accomplishment Instructions of Dassault Service Bulletin F50-518, dated April 14, 2011; or Dassault Service Bulletin F2000-368, dated May 29, 2009; as applicable. Once brake hoses having P/N 00-200-1534 are fitted in an MLG leg, no further action is required for that MLG leg, as specified in paragraph (j) of this AD.
If, during the inspection required by paragraph (g) of this AD, it is determined that the airplane is equipped with an MLG leg assembly with a part number specified in table 1 to paragraph (j) of this AD, the requirement of paragraph (h) of this AD is not applicable, provided that the MLG leg assembly has not been modified in service after its installation on an airplane.
| Model | MLG leg position | Part No. |
|---|---|---|
| MYSTERE-FALCON 50 airplanes | Left Hand (LH) | C23791-1009 amdt F. |
| MYSTERE-FALCON 50 airplanes | Right Hand (RH) | C23792-1009 amdt F. |
| FALCON 2000 | LH | D23345000-7 amdt B. |
| FALCON 2000 | RH | D23346000-7 amdt B. |
Note 3 to paragraph (j) of this AD: The parts specified in table 1 to paragraph (j) of this AD are known to be delivered with brake hoses having P/N 00-200-1534 that are fitted with Dacron sleeves.
As of the effective date of this AD, no person may install a brake hose having P/N AE705317-1 or P/N 00-200-1268 on any airplane, unless the brake hose has been inspected to verify that protective wraps are installed on the hose, in accordance with the Accomplishment Instructions of Dassault Service Bulletin F50-510, Revision 2, dated December 20, 2012; or Dassault Service Bulletin F2000-382, Revision 2, dated May 12, 2011; as applicable.
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
