display:
DOOR FWD CARGO
DOOR AFT CARGO.
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52-34-00
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747-400 MAINTENANCE MANUAL
(h) Make sure the green LATCHES CLOSED light on the external door control panel goes off.
TASK 52-34-00-805-005
3. Forward/Aft Cargo Doors Adjustment (Figs. 501 - 505)
A. General
(1)
This adjustment is for the cargo door mechanisms and sequence switches. The cargo door open warning switch is adjusted in 52-71-00/501.
B.
Special Tools and Equipment
(1)
G12001-50 Rig Pin Kit ~................................................................... |Assy No. | Rigging Pin No. | Length (inch) | Dia (inch) | Qty| ..................................................................... | -6 | LCD-1 | 3.0 | 0.187 | 7 | 2..........…..................….................…..............…....1
(2)
MIT61B4102-1 Dummy Latch Pin Set, Lower Lobe Cargo Door
C.
Standard Tools and Equipment
(1)
Multimeter - (for continuity check)
(2)
Clamps - (to hold the pressure relief doors closed while the pushrods are disconnected)
D.
Consumable Materials
(1)
G02020 Clay - Modeling
(2)
D00250 Jelly - Petroleum
(3)
A00247 Sealant - BMS 5-95, Class B
(4)
B00148 Solvent - Methyl Ethyl Ketone (MEK),
TT-M-261
(5)
D00013 Grease - MIL-G-23827
E.
References
(1)
24-22-00/201, Manual Control
(2)
25-52-01/401, Containerized Cargo Compartment Ceiling and Sidewall Linings
(3)
51-31-01/201, Seals and Sealing
(4)
52-34-00/801, Forward/Aft Cargo Doors
(5)
AIPC 52-34-09 Fig. 1, AIPC 52-34-09 Fig. 2
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A
747-400
MAINTENANCE MANUAL
CARGO DOOR
JUNCTION BOX
LIFT
MECHANISM
DOOR
ATTACHMENT
MASTER LATCH LOCK MECHANISM
SEE A
MASTER LATCH LOCK MECHANISM
SEE A
LOWER CARGO DOOR
(EXAMPLE)
Master Latch Lock Mechanism Adjustment
Figure 501 (Sheet 1)
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H48380
A
747-400 MAINTENANCE MANUAL
PRESSURE
RELIEF DOOR
B
(2 LOCATIONS)
PRESSURE
RELIEF DOOR
PRESSURE
PUSHROD
RELIEF DOOR
(2 LOCATIONS)
TORQUE TUBE
AB
BELLCRANK
(2 LOCATIONS)
C
TORQUE TUBEMASTER LATCH UPPER PUSHROD
LOCK HANDLE
HANDLE
MASTER LATCH
MECHANISM
LOCK HANDLE
STOP
TORQUE TUBE
MASTER LATCH
SEE B LOWER PUSHROD
LOCK TORQUE
D
TUBE
C D
FWD
A
MASTER LATCH LOCK MECHANISM
A
DOOR CLOSEDAFT PRESSURE RELIEF STOPDOOR PUSHROD
POINT B CARGO DOOR STOP BOLT
0.06
INCH CLEARANCE
0.02
+ 0.6
TORQUE TUBE 8.0 INCH
-0.3
UPPER PUSHROD
RIG PIN HOLE PRESSURE
POINT A
LCD-1 (4)
RELIEF DOOR PRESSURE PRESSURE
(OPEN) RELIEF DOORRIG PIN HOLERELIEF DOOR (CLOSED)LCD-1 (3)
TORQUE TUBE BELLCRANK
TORQUE TUBE
UPPER IDLER
BELLCRANK BELLCRANK
