Airworthiness Directive · Amendment 39-18775 · Hydraulic power
Airbus Airplanes
This AD applies to Airbus Model A330-201, -202, -203, -223, -223F, -243, -243F, -301, -302, -303, -321, -322, -323, -341, -342 and -343 airplanes; and Model A340-211, -212, -213, -311, -312, -313, -541, and -642 airplanes; certificated in any category, fitted with a hydraulic reservoir (HR) pressure relief valve (PRV) part number (P/N) 42F0026 installed on TECHSPACE HR having P/N 42F1005, 42F1203, 42F1304, 42F1412, 42F1512, or 42F1607.
We are adopting a new airworthiness directive (AD) for certain Airbus Model A330-200 Freighter, -200 and -300 series airplanes; and Airbus Model A340-200, -300, -500, and -600 series airplanes. This AD was prompted by reports of certain hydraulic reservoirs (HRs) becoming depressurized due to air leakage from the HR pressure relief valve (PRV). This AD requires repetitive inspections of the hydraulic fluid levels and nitrogen gas pressure in the HR for each hydraulic circuit, and if necessary, adjustment of the fluid level(s) and nitrogen pressure in affected HRs. We are issuing this AD to address the unsafe condition on these products.
Within the compliance time defined in table 1 to paragraph (g) of this AD, as applicable, inspect the HR fluid level and nitrogen pressure of each hydraulic circuit, in accordance with the instructions of paragraph 4.2.2.1 of Airbus Alert Operators Transmission (AOT) A29L005-16, Revision 01, dated June 28, 2016. Repeat the inspection thereafter at intervals not to exceed 1,600 flight hours.
| Compliance Time | |
| (A or B, whichever occurs later) | |
| A | Before accumulating 1,600 flight hours since first flight of the airplane. |
| B | Within 1,000 flight hours or 3 months, whichever occurs first after the effective date of this AD. |
If, during any inspection required by paragraph (g) of this AD, any unacceptable pressure or fluid level is identified, before further flight, do the actions in paragraphs (h)(1) and (h)(2) of this AD, as applicable, for each unacceptable pressure or fluid level that is discovered. Accomplishment of these actions on an airplane does not constitute terminating action for the repetitive inspections as required by paragraph (g) of this AD for that airplane.
(1) Add or remove hydraulic fluid, as applicable, in accordance with the instructions of paragraph 4.2.2.2 of Airbus Alert Operators Transmission (AOT) A29L005-16, Revision 01, dated June 28, 2016.
(2) Add or remove nitrogen gas, as applicable, in accordance with the instructions of paragraph 4.2.2.2 of Airbus AOT A29L005-16, Revision 01, dated June 28, 2016.
Concurrent with the initial inspection specified in paragraph (g) of this AD, revise the maintenance or inspection program, as applicable, to incorporate the hydraulic reservoir servicing actions specified in paragraph 4.2.2.2 of Airbus AOT A29L005-16, Revision 01, dated June 28, 2016.
After accomplishing the revision required by paragraph (i) of this AD, no alternative actions (e.g., inspections) and intervals may be used unless the actions and intervals are approved as an alternative method of compliance (AMOC) in accordance with the procedures specified in paragraph (l)(1) of this AD.
