Equipment list operational and

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MAINTENANCE PROCEDURES

SYSTEM & SEQUENCE NUMBERS

REMARKS OR EXCEPTIONS

21 AIR CONDITIONING (Continued)
15. Cabin Outflow Valves

(M) May be inoperative provided:

a) At least one valve is secured open,

b) Cabin Pressurization Air Source Selector remains in OFF or FRESH AIR,

c) The flight is conducted unpressurized, and

d) Crew and passengers comply with any applicable oxygen requirements.

MAINTENANCE PROCEDURES

1. Gain access to the Outflow Valves which are located on the Aft Pressure Bulkhead in the aft cabin.

2. Remove the bolts and washers securing either valve from its mount on the forward side of the bulkhead.

3. With all lines, hoses and wiring still connected, secure the valve away from its mount using MS3367-4-9 tie-wrap, wire, or other suitable device. The Outflow Valve must not be allowed to slip back into position and block the opening in the Aft Pressure Bulkhead.

4. Place a placard near the Pressurization Controller stating: “PRESS SYS. INOP.”

5. Make appropriate discrepancy report entry.

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SYSTEM & SEQUENCE NUMBERS

REMARKS OR EXCEPTIONS

22 AUTOPILOT
1 Autopilot

2. Yaw Damper

(M) May be inoperative provided operations (single pilot, RVSM or other) do not require its use.

MAINTENANCE PROCEDURES

NOTE: With the autopilot inoperative, aircraft must be operated using a crew of two.

1. Electrically isolate all three Autopilot Servos:

a) Select BATTERY and AVIONICS POWER

switches to OFF.

b) Gain access to the Elevator Autopilot Servo (PSV-P1) and Rudder Autopilot Servo (YSV-P1) in the tailcone by opening the large battery access door 321BL, which acts as the tailcone baggage LH aft closeout. Refer to Chapter 6, Access Plates and Panels Identification - Description and Operation.

c) Disconnect electrical connector (PT304) from the Elevator Autopilot Servo (PSV-P1), and the electrical connector (PT305) from the Rudder Autopilot Servo (YSV-P1). Bag and secure the connectors away from all control cables.

d) Gain access to the Aileron Autopilot Servo (RSV-P1) in the tailcone by removing Panel 321A, located on the left side of the forward closeout in the tailcone baggage compartment. This large panel provides access to the tailcone systems area. Refer to Chapter 6, Access Plates and Panels Identification - Description and Operation.

e) Disconnect electrical connector (PT303) from the Aileron Autopilot Servo (RSV-P1). The servo is located approximately 6 inches aft of the bottom of the Aft Pressure Bulkhead in the center of the service bay. Bag and secure the connector away from control cables.

f) Re-install Panels 321A and 321BL.

2. Operate the control yoke and the rudder pedals through full control travel in all 3 axes to ensure that autopilot clutches are disengaged, and travel is unobstructed.

3. Place an “INOP” placard next to Autopilot (AP) switch on Autopilot Controller.

4. Make appropriate entry on the discrepancy report.

(M) May be inoperative provided aircraft is operated using a crew of two.

MAINTENANCE PROCEDURES

NOTE: With the Yaw Damper inoperative, the Autopilot will also be inoperative.

(Continued Next Page)

SYSTEM & SEQUENCE NUMBERS

REMARKS OR EXCEPTIONS

22 AUTOPILOT (Continued)
2. Yaw Damper (Continued)

1. Electrically isolate the Rudder Servo:

a) Select BATTERY and AVIONICS POWER
switches to OFF.

b) Gain access to the Rudder Autopilot Servo (YSV-P1) in the tailcone by opening the large battery access door 321BL, which acts as the tailcone baggage LH aft closeout. Refer to Chapter 6, Access Plates and Panels Identification - Description and Operation.

c) Disconnect the electrical connector (PT305) from Rudder Autopilot Servo (YSV-P1). Bag and secure the connector away from all control cables.

d) Close Panel 321BL.

2. Check operation of flight controls for freedom of movement and smoothness through complete range of travel.

3. Place a “Yaw Damp/AP INOP” placard next to Autopilot (AP) switch on Autopilot Controller.

4. Make appropriate entry on the discrepancy report.

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