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民航

CONDITIONAL INSPECTIONS - GENERAL
1. General
A. This section contains the recommended checks and inspections which are dictated by special
or unusual conditions. The following subjects identify the conditions and list the recommended
checks and inspections. Procedures required for accomplishing specific checks or inspections
are covered in the individual system or component subjects in the appropriate chapters of the
manual.

OVERWEIGHT TAXI CONDITION - MAINTENANCE PRACTICES (CONDITIONAL INSPECTION)
1. General
Overweight Taxi:
Taxiing at a weight that is more than the maximum-design-taxi-weight (MTW).
Before flight, you must decrease airplane weight to that specified by the
Airplane Flight Manual for takeoff.
A. Inspection Criteria; An immediate structural inspection is necessary if you:
(1) taxi the airplane overweight by more than 1/2% of the maximum-taxi-weight (MTW).
(2) taxi the airplane overweight any weight over the Maximum Design Taxi Weight (MTW) and
have any of these conditions:
(a) High speed ground turn
(b) Sharp radius turn
(c) Heavy braking
(d) Taxi over rough pavement
(e) Pivoting (sharp radius turning with brakes on)
B. The Inspections
(1) The inspection is divided into Phase 1 and 2.
(2) If the inspection for Phase 1 shows no signs of damage, the inspection is complete. If the
Phase 1 inspection shows any sign of damage, the Phase 2 inspection must be done.
(3) If the criteria for the above paragraphs 1.B.(1) or 1.B.(2) have not been met, no inspection
is required, but you must decrease airplane weight to that specified by the Airplane Flight
Manual before takeoff.
C. Inspections, Repairs, and Replacements
(1) When this procedure tells you to "examine" a part, look for these conditions:
– cracks
– structure that pulled apart
– loose paint (paint flakes)
– twisted parts (distortion)
– bent parts
– wrinkles or buckles in structure
– fastener holes that became larger or longer
– loose fasteners
– missing fasteners (fasteners that have pulled out or are gone)
– delaminations (a component with one or more layers pulled apart)
– parts that are not aligned correctly
– interference (clearance that is not sufficient between two parts)
– discoloration (heat damage)
– nicks or gouges
– other signs of damage
(2) Replace or repair the components that have one or more of the conditions given above.

2. Phase 1 Inspection
A. Airplane Inspection
(1) Main and Nose Landing Gear Inspection
(a) Examine all tires and wheels.
(b) Examine the support structure.
(c) Look for signs of fluid leakage at the top and bottom of the outer cylinder of the shock
strut.
NOTE: A small quantity of hydraulic fluid on the surface of the inner cylinder of the
shock strut is satisfactory.
(2) Landing Gear, Fuselage, and Wing Inspection
(a) Look for fuel leaks, and other fluid leaks, in the areas that follow:
1) All wheel well areas of the main and nose landing gear.
2) The lower external surface of the fuselage in the area of the wing-to-body
fairing.
3) The wing.
3. Phase 2 Inspection
A. References
(1) 7-11-11, Jacking Airplane
(2) 12-15-31, Main Gear Shock Strut - Servicing
(3) 12-15-41, Nose Gear Shock Strut - Servicing
(4) 32-11-0, Main Landing Gear
(5) 32-11-21, Main Gear Shock Strut
(6) 32-21-0, Nose Landing Gear
(7) 32-21-11, Nose Gear Shock Strut
(8) 32-32-0, Main Landing Gear Extension and Retraction
(9) 32-33-0, Nose Landing Gear Extension and Retraction
(10) 32-51-0, Nose Wheel Steering System
B. Airplane Inspection
(1) Main Landing Gear and Support Structure Inspection
(a) Make sure the shock strut pressures are normal and the hydraulic fluids are at the
correct levels (Ref 12-15-31).
(b) Lift the airplane with jacks (Ref 7-11-11).
(c) Examine the inner and outer cylinder lugs.
(d) Examine all structural components of the main landing gear and carefully examine
the components that follow:
1) Shock strut
2) Trunnion link
3) Drag strut
4) Torsion links
5) Side strut
6) Walking beam fitting of the shock strut
7) Walking beam for the main gear actuator
8) Linkage fittings of the walking beam and actuator
9) The attach nut of the orifice support tube (signs of fluid leakage).
10) Strut doors and the mechanism that retracts and extends the doors

(e) Examine the support structure of the main landing gear and carefully examine the
components that follow:
1) Landing gear beam
2) Support fittings for the landing gear beam
– Inboard
– Outboard
3) Trunnion support fittings and attachments
– Forward
– Aft
4) Stabilizer link and fittings between the rear spar and landing gear beam.
5) Body fitting for side strut and uplock attachment.
(f) Examine all of the pin joints and fuse pin connections.
(g) If you found tire damage in Phase 1, do the steps that follow:
1) Remove and examine the wheel structure.
2) Remove and examine the brake assembly.
3) Examine the axles.
(h) If one or more of the conditions that follow occurred, remove, disassemble, and
examine all parts of the shock strut (Ref 32-11-21).
1) The shock strut pressures were sufficiently low to cause damage.
2) The hydraulic fluid levels were sufficiently low to cause damage.
3) You found damage to one or more of the parts during your inspection of the
landing gear.
NOTE: Do not remove the orifice support tube to examine it.
(i) Make sure the main landing gear retracts and extends correctly (Ref 32-32-0).
(j) Lower the airplane from the jacks (Ref 7-11-1).
(2) Nose Landing Gear and Support Structure Inspection
(a) Make sure the shock strut pressures are normal and the hydraulic fluids are at the
correct levels (Ref 12-15-41).
(b) Lift the nose of the airplane with jacks (Ref 7-11-1).
(c) If you found tire damage in Phase 1, do the steps that follow.
1) Remove and examine the wheel structure.
2) Examine the axle.
(d) Examine all structural components of the nose landing gear and carefully examine
the components that follow:
1) Shock strut
2) Torsion links
3) Drag strut
4) Lock links
5) Drag brace link
6) The attach nut of the orifice support tube (signs of fluid leakage).

(e) Examine the wheel well area and carefully examine the parts that follow:
1) Web (the left and right side walls)
2) Aft bulkhead
3) Trunnion attachments
4) Drag strut attachments
(f) Examine the wheel well bulkheads and fuselage outboard of nose wheel well at
(Body Stations 294.5 and 360).
NOTE: You can do this inspection on the forward side through the access holes in
the sidewalls of the nose wheel well. Examine the aft side of the bulkhead at
Body Station 294.5 from the electronics compartment.
(g) If one or more of the conditions that follow occurred; remove, disassemble, and
examine all parts of the shock strut (Ref 32-21-11).
1) The shock strut pressures were sufficiently low to cause damage.
2) The hydraulic fluid levels were sufficiently low to cause damage.
3) You found damage to one or more of the parts during your inspection of the
landing gear.
NOTE: Do not remove the orifice support tube to examine it.
(h) Make sure that steering system is adjusted and operates correctly (Ref 32-51-0).
(i) Make sure the nose landing gear retracts and extends correctly (Ref 32-33-0).
(j) Lower the nose of the airplane from the jacks (Ref 7-11-11).
(3) Fuselage Inspection
NOTE: If you find external damage to the fuselage, always examine the adjacent internal
structure.
(a) Examine the lower fuselage structure.
NOTE: Examine carefully in the area below the body crease from Body Station 727
to 100 inches aft.
(b) Examine carefully these components (Body Stations 540 through 727A):
1) Keel beam chords
2) Stiffeners
3) Webs and splices
(c) Also examine carefully the top of the fuselage between S-6 left and S-6 right (Body
Stations 540, 664, and 727).

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