(b)
(c)
(d)
(e)
(f)
(g)
757 MAINTENANCE MANUAL
2) 6M16, CAPT PRIMARY INSTR BUS PH A 3) 6M17, CAPT PRIMARY INSTR BUS PH B 4) 6M18, CAPT PRIMARY INSTR BUS PH C 5) 11Q34, CAPT ALT INST BUS PH A 6) 11Q35, CAPT ALT INST BUS PH B 7) 11Q36, CAPT ALT INST BUS PH COpen these circuit breakers: 1) 31EF2 or 6J17 or 6J14, 115V AC LEFT XFR BUS 2) 32EF2 or 6J23 or 6D14 or 6J20, 115V AC RIGHT XFR BUSDo a check for voltage at these circuit breakers:
BUS___ CIRCUIT BREAKER_______________ TERMINAL________ VOLTAGE_______
115v ac L Transfer 11E9, L FMCS CMPTR 2 0 |5 ac
C609
115v ac R Transfer 11M19, R AUTO PACK 2 0 |5 ac
C674
Captains Instr 11E1, L IAS MACH 1 0 |5 ac
C580
Hot Battery 6C7, HYD GEN 1 0 |3 dc
28V DC C4348
Do a check for 28v dc |3 at terminal 2 of the circuit breaker HYD GEN 28V DC (6C7).If you use the hydraulic service cart to pressurize the hydraulic system, do this procedure: 1) Pressurize the left hydraulic system with the hydraulic
service cart (AMM 29-11-00/201).If you use the Alternating Current Motor Pump (ACMP) to pressurize the hydraulic system, do these procedures: 1) Pressurize the left hydraulic system and the right
hydraulic system with the ACMPs (AMM 29-11-00/201). 2) Put the PTU switch on the P61 panel to the ON position.Close these circuit breakers: 1) 31EF2 or 6J17 or 6J14, 115V AC LEFT XFR BUS 2) 32EF2 or 6J23 or 6D14 or 6J20, 115V AC RIGHT XFR BUS
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(h)
Open these P11 circuit breakers and attach DO-NOT-CLOSE tags: 1) 11R6, AC BUS SENSE LEFT 2) 11R29, AC BUS SENSE RIGHT
(i)
Do a check for voltages at these circuit breakers:
BUS___ CIRCUIT BREAKER ________ VOLTAGE
_______________ TERMINAL _______
115v ac L Transfer 11E9, L FMCS CMPTR 2 118 |5 ac C609
115v ac R Transfer 11M19 R AUTO PACK 2 118 |5 ac PWR C674
Captains Instr 11E1, L IAS MACH 1 118 |5 ac C580
Hot Battery 6C7, HYD GEN 28V DC 1 32 |4 dc C4348
(j)
Remove the DO-NOT-CLOSE tags and close these P11 circuit breakers: 1) 11R6, AC BUS SENSE LEFT 2) 11R29, AC BUS SENSE RIGHT
(k)
Put the airplane back to the ground mode (AMM 32-09-02).
S 725-024
(6) AIRPLANES WITHOUT SB 78-32 THRUST REVERSER SYNC LOCK INSTALLATION; Do a check of the Thrust Reverser EROPS Transfer Relay:
(a)
Make sure these P11 circuit breakers are closed:
1) 11R6, AC BUS SENSE LEFT
2) 11R29, AC BUS SENSE RIGHT
3) 11K33 or 11B30, T/R CONT R
4) 11K32 or 11B29, T/R IND R
(b)
Make sure this P6 circuit breaker is closed:
1) 6C3, HYD GEN CONT
(c)
Remove these air/ground relays from the P36 panel.
1) The System 1 K177 and the K199 relays.
(d)
Remove these air/ground relays from the P37 panel.
1) The System 2 K203 and the K263 relays.
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(e)
Make sure the GND PROX/HYD GEN switch on P61 is in the off position and do these checks: 1) Make sure that 28v dc is at pin 7 of the receptacle D1866
for the K263 relay (P37). 2) Make sure that 28v dc is at pin A2 of the receptacle D616 for the K203 relay (P37).
(f)
Hold the GND PROX/HYD GEN switch on P61 in the HYD GEN position do these checks: 1) Make sure the HMG operates. 2) Make sure that 28v dc is at pin C2 of the receptacle D598
for the K199 relay (P36). 3) Make sure that 28v dc is at pin 7 of the receptacle D606 for the K177 relay (P36). 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：757 AMM 飞机维护手册 电源 ELECTRICAL POWER 2(6)
