WARNING: ALWAYS USE A PRESSURE REGULATOR ON HIGH PRESSURE AIR SOURCE WHEN INFLATING TIRES. DO NOT INFLATE TIRES ABOVE THEIR STRUCTURAL LIMITATIONS.
(2)
By pushing or pulling the airplane so that the main gear is moved up an inclined block. The slope is not important except from the viewpoint of increased tow-bar load. The block should level out at a minimum height of 4 inches (assuming a jack with a collapsed height of 10 inches). If one block is used under each wheel there should be sufficient clearance between them to permit insertion of the axle jack base.
C. For one flat tire a procedure similar to those adapted in A may be applied. If an axle jack cannot be inserted at once an inclined block may be used. In using an inclined block, however, the block should be made of sufficient height to make subsequent use of an axle jack unnecessary. The good wheel would be run up inclined block.
4. Jack Nose Landing Gear Axle
A. For a nose gear axle with both tires flat, raise the airplane with minimum height jacks (Ref 7-11-11, Fig. 202). Prior to jacking the nose gear, disconnect the nose gear torsion link, and check that all landing gear downlocks are installed.
CAUTION: THE RUDDER PEDALS ARE DIRECTLY CONNECTED TO THE NOSE GEAR STEERING AND ANY MOVEMENT WOULD HAVE A TENDENCY TO THROW THE NOSE GEAR OFF THE JACK IF THE TORSION LINKS ARE NOT DISCONNECTED.
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7-11-31 Page 202 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. May 1/76
B. If both tires on the nose gear axle are flat and suitable jacks are not available, it will be necessary to raise the axle initially by one of the following methods.
(1)
By reinflating the tires. At least one tire must be in good shape and well seated on its wheel. A source of high pressure air, such as air bottles, must be available. Refer to 12-15-51 for tire inflation.
WARNING: ALWAYS USE A PRESSURE REGULATOR ON HIGH PRESSURE AIR SOURCE WHEN INFLATING TIRES. DO NOT INFLATE TIRES ABOVE THEIR STRUCTURAL LIMITATIONS.
(2)
By pushing or pulling the airplane so that the nose gear is moved up an inclined block. The slope is not important except from the viewpoint of increased towbar load. The block should level out at a minimum height of 6 inches (assuming a jack with a collapsed height of 10 inches is available). If one block is used under each wheel there should be sufficient clearance between them to permit insertion of the axle jack base.
(3)
By jacking the airplane at the nose jacking point D as described in Section 7-11-21, (Raise Airplane Nose), the use of an axle jack is unnecessary. (Refer to 7-11-11, figure 201.)
C. If one nose gear tire is flat, procedures similar to those adopted in A may be applied. If an axle jack cannot be inserted, the wheel with a good tire could be run up an inclined block. By using an inclined block of sufficient height, subsequent use of an axle jack would be unnecessary. The good wheel would be run up inclined block.
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Feb 15/73 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 7-11-31 Page 203
SUPPORT AIRPLANE WITH ENGINES REMOVED
1. General
A. Normally, no airplane support will be required during engine removal on the 737 series airplane.
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May 15/67 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 7-11-41 Page 201
LIFTING DAMAGED AIRPLANE
1. General
A. Procedures for lifting and recovery of damaged aircraft are contained in the Boeing Document D6-40146, 707, 727, 737 AIRPLANE RECOVERY.
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Jun 20/85 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 7-12-0 Page 201
TILT AIRPLANE FOR TAIL CLEARANCE
1. General
A. The airplane nose is raised by means of a nose lift dolly. The nose is raised when it is necessary to lower the aft section of the airplane for clearance in hangar and storage areas. As the body attitude increases to a maximum of 10 degrees, 48 minutes, or the nose gear wheels raised 84 inches with maximum extension of nose strut limited to 22 inches, the tail height is reduced to approximately 28 feet, depending upon the nose lift dolly used.
B. The airplane may require ballast. Add ballast before tilting to prevent tipping. Refer to par. 5 for balance check. See Fig. 211 when total airplane moment is below +900 for ballast requirements.
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