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Old 31st Aug 2002, 21:10
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GotTheTshirt
 
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Below is an FAA issued 1999 against L1011 aircraft.

Some of the wording may seem familiar !!
The last Para fits modified pumps.

AD 99-24-12

To prevent a potential fire or explosion in the wing fuel tank, accomplish the following:

RESTATEMENT OF REQUIREMENTS OF AD 98-08-09, Amendment 39-10492
AFM Revision
(a) Within 50 flight hours or 10 days after April 28, 1998 (the effective date of AD 98-08-09, amendment 39-10492), whichever occurs first, revise the Limitations and Procedures Sections of the FAA-approved Airplane Flight Manual (AFM) to include the following information. This may be accomplished by inserting a copy of this AD into the AFM.

Add to Limitations Section:

FUEL SYSTEM
Fuel Pumps
Do not operate the fuel boost pumps of the affected wing tank in the air or on the ground when fuel quantities are less than the following:

Wing tanks 1 and 3: Less than 1,200 lbs. (545 kg) in each tank.

Wing tanks 2L and 2R: Less than 1,200 lbs. (545 kg) total in the two compartments (inboard and outboard) of each tank.

These quantities should be considered unusable fuel for the purposes of fuel management.


Placard Installation
(b) Within 50 flight hours or 10 days after April 28, 1998, whichever occurs first, install a placard on the engineer's fuel panel that states:

"If FQIS is operative, do not operate the fuel boost pumps when less than 1,200 pounds of fuel are in the corresponding wing tanks."

NEW REQUIREMENTS OF THIS AD
Modification
(c) Within 18 months after the effective date of this AD: Modify each fuel boost pump assembly in accordance with Parts 2.A. through 2.I. inclusive of the Accomplishment Instructions of Lockheed Service Bulletin 093-28-093, Revision 1, dated February 8, 1999. Accomplishment of this modification terminates the requirements of this AD. Following accomplishment of the modification, the AFM revision may be removed from the AFM, and the placard may be removed.

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