R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 401-499,
Each MMI has a Magnetic Level Indicator (MLI) 104QM thru 113QM. The MLI is contained in its related Magnetic Level-Indicator Housing (MLIH) 56QM thru 65QM.
**ON A/C 301-399,
Each MMI has a Magnetic Level Indicator (MLI) 104QM thru 111QM, 204QM thru 207QM, 210QM and 211QM. The MLI is contained in its related Magnetic Level-Indicator Housing (MLIH) 56QM thru 63QM, 200QM thru 203QM and 208QM thru 209QM.
**ON A/C ALL
The center tank MLI 92QM has two MLIHs. The upper MLIH 91QM is in the bottom skin of the center tank. The lower MLIH 98QM is in the belly fairing immediately below the upper MLIH.
**ON A/C 001-049, 051-099, 101-105, 151-199, 201-213,
When a MLI is extended from its MLIH, the fuel level in that area of the fuel tank can be measured.
The attitude monitor 39QM is in the belly fairing, behind the access panel 192MB. When the MMIs are used, an aircraft attitude reading is taken from the attitude monitor or the ADIRU or the FQIC input parameters. This reading gives the out-of-level attitude in the pitch and roll axes.
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When a MLI is extended from its MLIH, the fuel level in that area of the fuel tank can be measured.
When the MMIs are used, an aircraft attitude reading is taken from the ADIRU or the FQIC input parameters. This reading gives the out-of-level attitude of the aircraft in the pitch and roll axes.
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4.
Power Supply
____________
Not applicable
5.
Interfaces
__________
Not applicable
6.
Component Description
_____________________
The MMI has two components:
-
the MLI
-
the MLIH.
R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 401-499,
A. MLI 104QM thru 113QM
(Ref. Fig. 005) The MLI is made of glass-reinforced plastic and has marks along its length to show fuel levels. At one end of the MLI is a magnet. At the other end is a slot and a bayonet-type lock. The MLI is installed in the MLIH.
B. Magnetic Level Indicator Housing 56QM thru 65QM
(Ref. Fig. 005)
The MLIH has:
-
a tube
-
a float assembly.
**ON A/C 301-399,
A. MLI 104QM thru 111QM, 204QM thru 206QM, 210QM and 211QM
(Ref. Fig. 005A) The MLI is made of glass-reinforced plastic and has marks along its length to show fuel levels. At one end of the MLI is a magnet. At the other end is a slot and a bayonet-type lock. The MLI is installed in the MLIH.
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Manual Magnetic Indicator (Wing Tank)
Figure 005
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Manual Magnetic Indicator (Wing Tank)
Figure 005A
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1 1
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INTENTIONALLY BLANK
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R R R R R R R R B. Magnetic Level Indicator Housing 56QM thru 63QM, 200QM thru 203QM and 208QM thru 209QM (Ref. Fig. 005A) The MLIH has: - a tube - a float assembly.
R **ON A/C ALL
Each MLIH assembly is almost the same. The angles of the body mounting-flanges and the MLIH tube lengths are different. An end cap prevents a fuel leakage when the MLI is in use or removed. A body attaches the tube to the fuel tank. The float assembly (which contains a magnet) is free to move up and down the outside of the tube. The MLIH (which fully contains the MLI) has a bayonet-type recess into which the MLI bayonet-lock engages.
C. MLI 92QM (Center Tank)
(Ref. Fig. 006) The center tank MLI is the same type as the wing tank MLIs.
D. Magnetic Level-Indicator Housing (Lower 98QM) (Upper 91QM) (Center Tank)
(Ref. Fig. 006) The center tank MLIH has: - two tubes - a float assembly - an upper-body assembly - a lower-body assembly.
The top tube is attached to the upper body assembly. The upper body assembly is on the bottom skin of the fuel tank. An end cap is at the upper end of the top tube. The end cap prevents a fuel leakage when the MLI is in use or removed. The float assembly (which contains a magnet) is free to move up and down the outside of the top tube.
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