(2)
Body Jacks - Regent Model 8156 (or equivalent)
(3)
Axle Jacks - Regent Model 5923 (or equivalent)
D. Nose and Main Landing Gear Ground Lockpins - F72735 (flyaway)
3. Raise Airplane
CAUTION: DO NOT EXCEED 1 INCH CLEARANCE FROM JACK RAM LOCKNUT TO COLLAR AS JACK IS BEING RAISED OR LOWERED. EXCESSIVE CLEARANCE CAN RESULT IN DAMAGE TO AIRPLANE STRUCTURE IF JACK FAILS.
DO NOT OPERATE THE MAIN DECK CARGO DOOR WHILE JACK FORCE IS BEING APPLIED TO THE JACK POINT AT THE FORWARD BODY. OPERATION OF THE DOOR CAN RESULT IN DAMAGE TO BOTH THE DOOR AND THE FUSELAGE.
A. Ensure that the maximum allowable jacking gross weight will not be exceeded and that C.G. conditions are such that airplane jack points allowable loads are not exceeded, and that all landing gear downlocks are in place.
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May 01/00 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 7-11-11 Page 201
B. Set stabilizer, aileron and rudder trim controls to O.
C. Trip flight recorder circuit breakers before jacking so that recorded data is not lost while airplane is on jacks.
D. Head airplane into the wind if in an exposed area.
CAUTION: DO NOT JACK AIRPLANE AT JACK POINTS D, G, AND C IF WINDS EXCEED 35 MILES PER HOUR.
E. When airplane is being jacked for weighing, leveling, or for general requirements, the landing gear shock struts may be deflated and locked in the compressed position using oleo lock assemblies at the main gear and nose gear. The airplane does not have to be jacked as high with the shock struts locked in the compressed position.
CAUTION: DO NOT PERFORM THIS STEP IF AIRPLANE IS BEING RAISED TO PERMIT A GEAR RETRACTION TEST. SUCH A TEST REQUIRES THAT GEAR BE FULLY EXTENDED.
IF SHOCK STRUT IS NOT COMPLETELY DEFLATED PRIOR TO OLEO LOCK ASSEMBLY INSTALLATION, OLEO LOCK ASSEMBLY MAY BE DAMAGED DURING JACKING OPERATION.
TO AVOID SERIOUS DAMAGE TO SHOCK STRUT, DO NOT JACK AIRPLANE WEIGHT OFF WHEELS WITH SHOCK STRUTS INFLATED ABOVE NORMAL PRESSURE.
F. When airplane is being jacked for gear retraction test or when airplane is jacked and shock struts are not deflated and locked, it should be noted that the main gear shock strut is canted to trail 1.85 degrees aft of the vertical axis. When jacking the airplane, normal oleo extension on the 88.15-degree angle causes aft wheel movement on the ground up to a maximum of 0.55 inch. If wheels are chocked or parking brakes are set during the jacking or lowering operation, wheel movement will result in sliding of the chocks or scuffing of tires on the pavement.
CAUTION: HORIZONTAL REACTION LOADS DUE TO SCUFFING OR SLIDING WILL BE TRANSMITTED THROUGH STRUCTURE TO THE JACK PADS, RESULTING IN A TENDENCY TO TIP THE JACKS OVER.
G. Jacking the airplane for weighing, leveling, gear retraction test, or for general requirements open the following circuit breakers.
(1) Drain, Mast. Air.
H. Remove jack pad adapter recess fillers and fasteners at position D.
NOTE: Aft body jacking adapter F80000-7 is a threaded rod with a machined semiball on one end. The F80000-7 is inserted into a jack pad fitting that is an integral part of the airplane structure.
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I. Install jack pad adapters and position jacks per Fig. 201 making sure that one leg of jack at position D points straight forward.
CAUTION: WHEN INSTALLING JACK PAD ADAPTERS, USE ATTACH BOLTS AS SPECIFIED IN FIG. 202 OR STRUCTURAL DAMAGE MAY RESULT.
STABILIZING JACK MUST BE USED DURING WINDY CONDITIONS. STABILIZER JACK MUST BE PRELOADED TO A MAXIMUM OF 5000 POUNDS AT WINDS OF 35 MPH.
NOTE: Jacks must be equipped with pressure gages and a conversion table to give pounds of load at each jack point.
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