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Old 23rd Sep 2008, 09:01
  #1974 (permalink)  
SPA83
 
Join Date: Dec 2007
Location: france
Age: 71
Posts: 74
from douglas WWW.CRASH-AERIEN.COM :: Voir le sujet - Madrid : crash au décollage d'un MD82 de Spanair


. R_e_m_o_v_a_l_/_I_n_s_t_a_l_l_a_t_i_o_n__-__R_A_T__P_R_O_B_E_
A. Remove RAT PROBE
W_A_R_N_I_N_G_: TAG AND SAFETY CIRCUIT BREAKER.
(1) Open following circuit breaker:
C_i_r_c_u_i_t__B_r_e_a_k_e_r_ P_a_n_e_l__L_o_c_a_t_i_o_n_ P_a_n_e_l__A_r_e_a_
RAM AIR TEMP & PROBE Lower EPC RIGHT AC BUS. HEATER
(2) Remove six screws which hold the temperature probe to the fuselage.
(3) Gently ease the temperature probe outward from the mounting hole and disconnect and cap the electrical mating connector.
B. Install RAT PROBE
(1) Make certain that following circuit breaker is open, tagged, and safetied:
C_i_r_c_u_i_t__B_r_e_a_k_e_r_ P_a_n_e_l__L_o_c_a_t_i_o_n_ P_a_n_e_l__A_r_e_a_
RAM AIR TEMP & PROBE Lower EPC RIGHT AC BUS. HEATER(2) Clean RAT probe and aircraft mounting surfaces with solvent (2a) Apply an even light coat of silicone sealant (DMS 1799) to faying surfaces of RAT probe and mounting surfaces of aircraft.
Remove cap from electrical connector. Align temperature probe with air inlet facing forward; connect electrical connector to temperature probe receptacle in proper keyway. (4) Position temperature probe for final mounting. Apply
sealant (DMS 2013) under head of attaching screws, then insert and tighten six screw (4a) Clean excess sealant from around RAT probe and attaching screws.
(5) Ensure that METER SEL & HEAT selector switch (located on overhead switch panel) is in OFF position.
(6) Remove tag and close following circuit breaker:
C_i_r_c_u_i_t__B_r_e_a_k_e_r_ P_a_n_e_l__L_o_c_a_t_i_o_n_ P_a_n_e_l__A_r_e_a_

RAM AIR TEMP & PROBE HEATER

Lower EPC

RIGHT AC BUS.

(7) Place standard centigrade thermometer within or adjacent to RAM air temperature probe air inlet. Allow sufficient time (3 to 5 minutes) for thermometer reading to stabilize, note final stabilized ambient air temperature at probe.
(Temperature reading of RAT on Ram air and thrust rating indicator should agree with thermometer reading within ±2.0 degrees centigrade. On aircraft with electronic engine display panel, RAT is displayed on the electronic engine display panel.
(10) On aircraft with True Airspeed and Static Air Temperature (TAS/SAT) Indicator installed, press TAT pushbutton switch on TAS/SAT indicator. Note digital annunciation shown on Static Air Temperature (SAT) display, and compare with ambient air temperature measured at probe air inlet. Two readings should agree within ±2.0 degrees centigrPlace CADC selector switch to BOTH ON 1 position, repeat step (9).
(11) Place CADC switch to NORM.
4. A_d_j_u_s_t_m_e_n_t_/_T_e_s_t__R_A_T__P_r_o_b_e_
C_A_U_T_I_O_N_: MAKE CERTAIN THAT RAM AIR TEMPERATURE PROBE HEATER OPERATION IS LIMITED TO TWO MINUTES MAXIMUM, TO PREVENT DAMAGE.
A. RAT Probe Heater Check
W_A_R_N_I_N_G_: TAG AND SAFETY CIRCUIT BREAKERS.
(1) Open following circuit breakers.
N_O_T_E_: Circuit breakers are opened to prevent other heaters from operating during test.

Overhead
Circuit Breaker
CAPTAIN’S PITOT HEATER

Panel Location Panel Area
EMERGENCY DC BUS



FIRST OFFICER’S PITOT HEATER
AUX PITOT HEATER

Lower EPC
Lower EPC

ICE PROTECTION DC BUS
ICE PROTECTION DC BUS



RUDDER Q LIMITER HEATER

Lower EPC

RIGHT AC BUS



LEFT ANGLE-OF-ATTACK & VANE HEATER

Lower EPC

LEFT AC BUS



RIGHT ANGLE-OF-ATTACK & VANE HEATER

Lower EPC

RIGHT AC BUS



LEFT STATIC PORT HEATER Lower EPC
LEFT GROUND CONTROL Upper EPC RELAY

LEFT AC BUS MISC AC BUS.



C_A_U_T_I_O_N_: MAKE CERTAIN RAT PROBE PROTECTIVE COVER IS REMOVED.
(2) Verify RAM AIR TEMP & PROBE HEAT circuit breaker and RIGHT STATIC PORT HEATER circuit breaker on lower EPC circuit breaker panel are closed.
(3) Place METER SEL & HEAT switch on overhead panel to RAT probe position.
(4) Current reading on meter should read 6.5 to 8.5.
(5) Close LEFT GROUND CONTROL RELAY circuit breaker.
(6) Current reading on meter should read 0.0 to 0.5.
(7) Place METER SEL & HEAT switch to OFF position.
(Close following circuit breakers.

Overhead
Circuit Breaker
CAPTAIN’S PITOT HEATER

Panel Location Panel Area
EMERGENCY DC BUS



FIRST OFFICER’S PITOT HEATER
AUX PITOT HEATER
RUDDER Q LIMITER HEATER
LEFT ANGLE-OF-ATTACK & VANE HEATER
RIGHT ANGLE-OF-ATTACK & VANE HEATER
LEFT STATIC PORT HEATER
LEFT GROUND CONTROL RELAY

Lower EPC
Lower EPC
Lower EPC
Lower EPC
Lower EPC
Lower EPC Upper EPC

ICE PROTECTION DC BUS
ICE PROTECTION DC BUS
RIGHT AC BUS
LEFT AC BUS
RIGHT AC BUS
LEFT AC BUS MISC AC BUS.

(9) Return airplane to required configuration
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