(2)
25-21-01/401, Sidewall and Ceiling Isulation
(3)
25-52-00/001, Containerized Cargo Compartments
(4)
53-20-01/01, Blowout Panel
B. Procedure
S 212-002
(1)
Examine the inflight depressurization blowout panels for movement (Ref 53-20-01/401).
S 212-003
(2)
Do a check to see if the sidewall dado panels are open (Ref 25-21-01/401).
S 212-004
(3)
Examine the containerized cargo compartment for these conditions (Ref 25-52-00/001):
(a) Moved Sidewall Panels
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A 747-400 MAINTENANCE MANUAL
(b) (c) Moved InsulationMoved Lining
(4) S 212-005Examine the outflow valve (AMM 21-31-01/601).
(5) S 212-006Examine the area around the outflow valve for damage.
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747-400 MAINTENANCE MANUAL
BLOWN/FLAT SPOTTED TIRES CONDITION - MAINTENANCE PRACTICES
__________________________________________________________ (CONDITIONAL INSPECTION)
________________________
1. General_______
A. Two tasks are supplied in this procedure. The first task is single flat spotted or blown tire checks. The second task is multiple flat spotted or blown tire check.
NOTE: These conditional inspections are for cases where blown/flat
____ spotted tires occur because of a locked wheel slide condition (not a tire structural failure). Also, the cause of the locked wheel slide is not clear.
B. The blown/flat spotted tires conditional inspection examines these components:
(1)
Brakes
(2)
Wheels
(3)
Wheel Bearings
(4)
Hydraulic Lines
(5)
Anti-skid Control Unit and Valve
(6)
Return Filter
(7)
Wiring to the Anti-skid Control Unit
C. Phase I checks are for cases where a single tire is flat spotted or blown. Phase II checks are for cases with multiple flat spotted or blown tires.
D. The checks should be made in the order listed.
TASK 05-51-25-202-001
2. Single Flat Spotted or Blown Tire Checks________________________________________
A. References
(1)
32-41-15/601, Landing Gear Brake Unit
(2)
32-42-00/501, Brake Control System
(3)
32-42-01/401, Brake System Control Unit
(4)
32-42-02/401, Antiskid Modular Assembly
(5)
32-45-03/601, Wheels
B. Procedure
S 282-002
(1)
Examine the brake for correct operation and condition (Ref 32-41-15/601).
S 282-003
(2)
Do a check for a cracked wheel and/or loose wheel bearings (Ref 32-45-03/601).
S 212-004
(3)
Do the anti-skid system test to make sure the brake system control unit operates correctly (Ref 32-42-00/501).
S 712-005
(4)
Do the anti-skid system brake release test on the damaged wheel to make sure the brake releases correctly (Ref 32-42-00/501).
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747-400 MAINTENANCE MANUAL
S 212-006
(5)
Examine the hydraulic lines and electrical wiring. Make sure the hydraulic lines and electrical wirirng are installed correctly.
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