Document ID: chunk:federal_register_of_legislation:F2006B03178:body:0:p1
Version: federal_register_of_legislation:F2006B03178
Segment Type: other
Provision Reference: 
Character Range: 0–3245

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 39.1 (1) of CAR 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.

 Boeing 747 Series Aeroplanes

                                                        AD/B747/283 Fuel Tank Limitations 1/2003 TX

 Applicability: All Model 747 series aeroplanes.

           Requirement:  Revise the Limitations Section of the Aircraft Flight Manual (AFM) to include the following (this may be accomplished by inserting a copy of this Directive into the AFM):

                Model 747-100, -200B, -200F, -200C, -100B, -300, -100B SUD, 747SR and 747SP

                            CERTIFICATE LIMITATIONS

                Fueling and use of the centre auxiliary fuel tank and auxiliary fuel tanks 1 and 4 (if installed) is prohibited.

                The centre wing tank (CWT) must contain a minimum of 17,000 pounds (7,700 kilograms) of fuel prior to engine start, if the CWT override/jettison pumps are to be selected ON during flight.

                The CWT fuel quantity indication system must be operative to dispatch with CWT mission fuel.

                Both CWT override/jettison pump switches must be selected OFF at or before the CWT fuel quantity reaches 7,000 pounds (3,200 kilograms), if the CWT fuel quantity is less than 50,000 pounds (22,700 kilograms) prior to engine start. The CWT override pumps may be selected ON during stabilized cruise conditio ns. Both CWT override/jettison pump switches must be selected OFF at or before the CWT fuel quantity reaches 3,000 pounds (1,400 kilograms).

                Both CWT override/jettison pump switches must be selected OFF at or before the CWT fuel quantity reaches 3,000 pounds (1,400 kilograms), if the CWT fuel quantity is greater than or equal to 50,000 pounds (22,700 kilograms) prior to engine start.

                Both CWT override/jettison pumps must be selected OFF when either CWT override/jettison fuel pump low pressure light illuminates.

Boeing 747 Series Aeroplanes

 AD/B747/283 (Continued)

                    Warning

                    Do not reset a tripped fuel pump circuit breaker.

                    Warning

                    Do not cycle the CWT pump switches from ON to OFF to ON with any continuous low pressure indication present.

                    Note

                    The CWT may be emptied normally in an emergency fuel jettison.

                    Note

                    In a low fuel situation, both CWT override/jettison pumps may be selected ON and all CWT fuel may be used.

                If a centre wing tank pump fails with fuel in the centre tank, shut off the affected fuel pump.

                If the main tanks