Airworthiness Directive · Amendment 39-18554 · Water/waste
Saab AB, Saab Aeronautics (Formerly Known as Saab AB, Saab Aerosystems)
This AD applies to Saab AB, Saab Aeronautics (formerly known as Saab AB, Saab Aerosystems) Model SAAB 2000 airplanes, certificated in any category, serial numbers 004 through 016 inclusive, 018, 022, 023, 024, 026, 029, 031, 032, 033, 035 through 039 inclusive, 041 through 044 inclusive, 046, 047, 048, 051, and 053 through 063 inclusive.
We are superseding Airworthiness Directive (AD) 2014-15-04 for certain Saab AB, Saab Aeronautics Model SAAB 2000 airplanes. AD 2014- 15-04 required deactivating the potable water system, or alternatively filling and activating the potable water system. This new AD requires inspecting the in-line heater for correct brazing and corrective action if needed, and installing a shrinkable tube on the water line and a spray shield on the in-line heater. This AD was prompted by a report of rudder pedal restriction which was the result of water leakage at the inlet tubing of an in-line heater in the lower part of the forward fuselage. This AD was also prompted by the development of a modification that would address the unsafe condition. We are issuing this AD to prevent rudder pedal restriction due to the pitch control mechanism becoming frozen as the result of water spray, which could prevent disconnection of the pitch control mechanism and normal pitch control, and consequently result in reduced controllability of the airplane.
This paragraph restates the requirements of paragraph (g) of AD 2014-15-04, with a new exception. Except as provided by paragraph (l) of this AD, within 30 days after September 9, 2014 (the effective date of AD 2014-15-04), deactivate the potable water system, in accordance with the Accomplishment Instructions of Saab Service Bulletin 2000-38-010, dated July 12, 2013.
This paragraph restates the requirements of paragraph (h) of AD 2014-15-04, with no changes. As an alternative, or subsequent, to the action required by paragraph (g) of this AD, during each filling of the potable water system after September 9, 2014, accomplish the temporary filling procedure, in accordance with the instructions in Saab Service Newsletter SN 2000-1304, Revision 01, dated September 10, 2013, including Attachment 1 Engineering Statement to Operator 2000PBS034334, Issue A, dated September 9, 2013.
At the applicable compliance times specified in paragraphs (j)(1) and (j)(2) of this AD, concurrently accomplish the actions specified in paragraphs (i)(1) and (i)(2) of this AD, in accordance with the Accomplishment Instructions of Saab Service Bulletin 2000-38-011, dated October 22, 2014.
(1) Do a detailed inspection for correct brazing of the in-line heater, and if any discrepancy is found, before further flight, and before accomplishment of the modification required by paragraph (i)(2) of this AD, accomplish all applicable corrective actions.
(2) Install a shrink tube on the water line and a spray shield on the in-line heater.
Do the actions specified in paragraph (i) of this AD at the applicable times specified in paragraphs (j)(1) and (j)(2) of this AD.
(1) For airplanes having had the potable water system reactivated and operated using the alternative filling procedure specified in Saab Service Newsletter SN 2000-1304, Revision 01, dated September 10, 2013, including Attachment 1 Engineering Statement to Operator 2000PBS034334, Issue A, dated September 9, 2013: Within 6 months after the effective date of this AD.
(2) For airplanes having the potable water system deactivated using procedures specified in the Accomplishment Instructions of Saab Service Bulletin 2000-38-010, dated July 12, 2013: Before further flight after the reactivation of the potable water system.
Accomplishing the actions required by paragraph (i) of this AD terminates the requirements of paragraphs (g) and (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.
