Document ID: chunk:federal_register_of_legislation:F2007L02358:body:0:p3
Version: federal_register_of_legislation:F2007L02358
Segment Type: other
Provision Reference: 
Character Range: 14710–17522

(AMOC) to FAA AD 2007-13-14, are considered acceptable for compliance with the equivalent Requirements of this Directive.
   Note 4:  FAA AD 2007-13-04 Amdt 39-15108 refers.

Compliance:  For Requirement 1 - Within six months after the effective date of this Directive.
             For Requirement 2 - After installing the new IDS-504 software required by Requirement 1 and within six months after the effective date of this Directive.
             For Requirement 3 - Concurrently with Requirement 1.
             For Requirement 4 - Concurrently with the Requirement 2.
             For Requirement 5 - Following compliance with Requirements 1 and 3.
             This Airworthiness Directive becomes effective on 30 August 2007.
Background:  This Directive is issued following a fuel system reviews conducted by the manufacturer.  The Directive is issued to reduce the potential for ignition sources inside fuel tanks, which, in combination with flammable fuel vapours, could result in fuel tank explosions and consequent loss of the aeroplane.

David Punshon
Delegate of the Civil Aviation Safety Authority

26 June 2007

Annex A

Certification Limitations

Center Wing Tank (CWT):

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

If the FUEL LO CTR L or R message is displayed both CWT override/jettison pumps must be selected OFF.

If the FUEL PRESS CTR L or R message is displayed, the corresponding CWT override/jettison pump must be selected OFF.

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

Horizontal Stabilizer Tank (HST):

The following additional limitations must be followed if the HST is fueled and used:

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

If the FUEL PMP STB L or R message is displayed while on the ground both HST pumps must be selected OFF.

If the FUEL LO STAB L or R message is displayed in flight the corresponding HST pump must be selected OFF.

If the FUEL PRESS STAB L or R message is displayed the corresponding HST pump must be selected OFF.

The remaining fuel in the HST must be considered unusable, and the effects of that unusable fuel on balance (CG) must be considered.

Note: In a low fuel situation, both HST transfer pumps may be selected ON and all HST fuel may be used.

Warning

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

Do not reset a tripped fuel pump circuit breaker.

Defueling:

Prior to defueling any fuel tanks, perform a lamp test of the respective Fuel Pump Low Pressure indication lights.  When defueling, the Fuel Pump Low Pressure indication lights must be monitored and the fuel pumps