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(4)
Supply electrical power (AMM 24-22-00/201).
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WARNING: MAKE SURE THAT PERSONS AND EQUIPMENT ARE CLEAR OF THE SPEED
_______ BRAKES. THIS PROCEDURE CAN CAUSE THE SPEED BRAKES TO OPERATE. THE ACCIDENTAL OPERATION OF THE SPEED BRAKES CAN CAUSE INJURIES TO PERSONS OR DAMAGE TO EQUIPMENT.
WARNING: YOU MUST CAREFULLY DO THE STEPS IN THE TASK BELOW TO PREPARE
_______ THE SAFETY-SENSITIVE SYSTEMS FOR THE AIR MODE. FAILURE TO DO THE STEPS CORRECTLY CAN CAUSE THE AUTOMATIC OPERATION OF AIRPLANE SYSTEMS. THIS CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
(5) Do this task: "Prepare Safety-Sensitive Systems for the Air Mode" (AMM 32-09-02/201).
NOTE:____It is not necessary to do this task: "Put the air/ground relay system in the air mode".
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(6) Make sure the Landing gear lever is in the DN position.
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(7) Make sure these circuit breakers are closed:
(a) P7 Overhead Circuit Breaker Panel
1) 7F22 LANDING GEAR DSP & CONT PRI
2) 7F23 LANDING GEAR DSP & CONT ALTN
3) 7F25 PSEU SECT 1
4) 7F26 PSEU SECT 2
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(8) Prepare the CMC for the test:
(a) Push the MENU key on the CDU.
(b) Push the line-select key, adjacent to the CMC display.
(c) Push the line-select key, adjacent to the OTHER FUNCTIONS
display.
(d) Push the line-select key, adjacent to the INPUT MONITORING
display.
(e) Push the CDU keys E/070/270/00, then push key 1L.
(f) Push the NEXT PAGE key.
(g) Push the CDU keys E/070/271/00.
(h) Push the NEXT PAGE key.
(i) Push the CDU keys E/070/272/00.
(j) Push the NEXT PAGE key.
(k) Push the CDU keys E/070/273/00.
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(9) Make sure that the landing gear are not turned (steering system is
centered).
G. Do a Test of the Primary Landing Gear Position Indication (Fig. 502)
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(1) Use the table that follows to identify the port/label and bit data necessary in the subsequent steps.
NOTE: This data is necessary when you do the system test for the
____ position indication system of the landing gear.
~.......................................................................... | BIT TABLE | ............................................................................ | | Bit Condition | ............................................................................ | Switch | Port/Label | Bit | 0 | 1 | ............................................................................ | L BODY GR | E/070/270/00 | 11 | NOT DOWN | GEAR DOWN | | DOWN/LOCK PRI | | | | |
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~.......................................................................... | BIT TABLE | ............................................................................ | | Bit Condition | ............................................................................ | Switch | Port/Label | Bit | 0 | 1 | ............................................................................ | L WING GR | E/070/270/00 | 12 | NOT DOWN | GEAR DOWN | | DOWN/LOCK PRI | | | | | ............................................................................ | R WING GR | E/070/270/00 | 13 | NOT DOWN | GEAR DOWN | | DOWN/LOCK PRI | | | | | ............................................................................ | R BODY GR | E/070/270/00 | 14 | NOT DOWN | GEAR DOWN | | DOWN/LOCK PRI | | | | | ............................................................................ | L BODY GR | E/070/270/00 | 15 | NOT UP | GEAR UP | | UP/LOCK PRI | | | | | ............................................................................ | L WING GR | E/070/270/00 | 16 | NOT UP | GEAR UP | | UP/LOCK PRI | | | | | ............................................................................ | R WING GR | E/070/270/00 | 17 | NOT UP | GEAR UP | | UP/LOCK PRI | | | | | ............................................................................ | R BODY GR | E/070/270/00 | 18 | NOT UP | GEAR UP | | UP/LOCK PRI | | | | | ............................................................................ | NOSE GR | E/070/271/00 | 18 | NOT DOWN | DOWN AND | | DOWN/LOCK PRI | | | AND LOCKED | LOCKED | ............................................................................ | NOSE GR | E/070/271/00 | 19 | NOT UP | UP AND | | UP/LOCK PRI | | | AND LOCKED | LOCKED | 2................…...................…..........…............….............1 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：747-400 AMM 飞机维护手册 起落架 LANDING GEAR 9(38)
