(2)
Access Panel
119BL Main Equipment Center
C. Remove the Airspeed Switch (Fig. 401)
S 864-002
(1) Open these circuit breakers on the overhead panel, P11, and attach circuit breaker locks:
(a)
11D26, HYDRAULIC RAT CONT OR HYDRAULIC RAT AUTO CONT
(b)
11D27, HYDRAULIC RAT AUTO, or HYDRAULIC RAT AUTO PWR
S 864-004
(2)
Open these circuit breakers on the main power distribution panel, P6, and attach circuit breaker locks:
(a)
6F1, RAT MAN, or RAT MAN PWR
(b)
6F2, RAT MAN CONT
(3)
Disconnect the electrical connector from the airspeed switch.
(4)
Disconnect the pitot-static lines from the airspeed switch.
S 034-007
(5)
Loosen the four screws on the support bracket near the corners of the airspeed switch.
S 034-005
S 034-006
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757
MAINTENANCE MANUAL
FWD
MAIN EQUIPMENT CENTER
SEE A
E1 RACK
AIRSPEED SWITCH FOR THE RAM AIR TURBINE (RAT)
SEE B
MAIN EQUIPMENT CENTER ELECTRICAL (EXAMPLE) CONNECTOR SUPPORT (D4514) A BRACKET HOSE FOR THE E1 RACK
AUXILIARY PITOT STANCHION
SYSTEM NO. 2 (REF)
HOSE FOR THE
SWITCH
ALTERNATE STATIC SYSTEM
SCREW WHICH ATTACHES
MOUNTING
THE MOUNTING CLAMP
CLAMP (4 LOCATIONS)
AIRSPEED SWITCH
B
RAT Airspeed Switch Installation
Figure 401
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757 MAINTENANCE MANUAL
S 024-008
(6) Remove the airspeed switch from the support bracket.
TASK 29-21-53-424-009
3. Install the Airspeed Switch for the Ram Air Turbine (RAT)_________________________________________________________
A. Equipment
(1) RAT Circuit Breaker Lock Set - B27065-9 or Equialent
B. References
(1)
AMM 29-21-00/501, Ram Air Turbine (RAT) System
(2)
AMM 34-11-00/501, Pitot-Static System
C. Access
(1)
Location Zones
119 Main Equipment Center
211/212 Control Cabin
(2)
Access Panel
119BL Main Equipment Center
D. Install the Airspeed Switch (Fig. 401)
S 424-010
(1)
Put the airspeed switch in the switch mounting clamp on the support bracket.
S 434-011
(2)
Tighten the screws on the support bracket, near the corners of the airspeed switch, to 5-8 pound-inches.
S 434-012
(3)
Connect the pitot-static lines to the airspeed switch.
(4)
Connect the electrical connector to the airspeed switch.
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