Document ID: chunk:federal_register_of_legislation:F2007L02165:body:0:p1
Version: federal_register_of_legislation:F2007L02165
Segment Type: other
Provision Reference: 
Character Range: 0–3363

AIRWORTHINESS DIRECTIVE
For the reasons set out in the background section, the CASA delegate whose signature appears below issues the following Airworthiness Directive (AD) under subregulation 39.001(1) of CASR 1998.  The AD requires that the action set out in the requirement section (being action that the delegate considers necessary to correct the unsafe condition) be taken in relation to the aircraft or aeronautical product mentioned in the applicability section: (a) in the circumstances mentioned in the requirement section; and (b) in accordance with the instructions set out in the requirement section; and (c) at the time mentioned in the compliance section.

Gulfstream (Grumman) G1159 and G-IV Series Aeroplanes
AD/G1159/50  Water Drain/Supply Valves  9/2007 DM

Applicability:  Gulfstream Model GIV-X, GV, and GV-SP series aeroplanes, as identified in the alert customer bulletins specified in Table 1 of this AD.

                Table 1. - Gulfstream Alert Customer Bulletins
                Aeroplane Model  Alert Customer Bulletin  Date
                GIV-X            G350 Number 5            11 April, 2007
                G450 Number 5    11 April, 2007
                GV               GV Number 26             11 April, 2007
                GV-SP            G500 Number 7            11 April, 2007
                G550 Number 7    11 April, 2007

Requirement:       1. Revise the Normal Procedures section of the AFMs to include the information in the applicable AFM supplement identified in Table 2 of this AD.  This may be done by inserting a copy of the supplement into the AFM.

                   Table 2. - AFM Supplements
                Aeroplane Model  AFM Supplement  Date
                GIV-X            G350-2007-01    12 April, 2007
                G450-2007-02     12 April, 2007
                GV               GV-2007-04      12 April, 2007
                GV-SP            G500-2007-03    12 April, 2007
                G550-2007-05     12 April, 2007

                2. Perform a functional check of the forward water system water drain/supply valves and do applicable corrective actions, in accordance with the applicable AFM supplement identified in Table 2 of this AD.

                Either the cockpit flight crew or certificated maintenance personnel may perform these functional checks.  If the water system has been deactivated as part of the corrective actions, the functional checks need not be performed again until the water system is reactivated.  Doing the optional terminating action specified below ends the requirement for the repetitive functional checks.
                3. No person may install a water supply valve having P/N 4E4151-1, or a water drain valve having P/N 4E4151-3, on any aeroplane.

                Optional Terminating Action

                Doing the following actions described below, as applicable, of this AD terminates the functional checks detailed in Requirement 2 of this AD.  After the actions specified in (1) and (2) below have been done, the applicable AFM supplement specified in Requirement 1 of this AD may be removed from the AFM.

                  (1) Inspect to determine the part numbers of the forward water drain/supply valves, in accordance with Part II of the Accomplishment Instructions of the applicable alert customer bulletin identified