Learjet 31A Pilot's Manual

5. Rotate upper door locking handle to the locked position . 7-2 PM-121 Change 2 Learjet 31A Pilot's Manual DOOR HOOK ACTUATOR SWRCH A door hook actuator switch is located on the upper step of the lower door. This switch actuates the door hooks that are incorporated to pull the upper and lower door halves tight against the door frame seal . This must be accomplished before rotating the upper door lock- ing handle to secure the door. The hooks must be released before flight to assure rapid egress through the upper cabin door during an emergency. The DOOR warning light is illuminated whenever the hooks are engaged. Power for the door hook actuator is 28 VDC sup- plied through the hot-wired 5-amp DOOR MOTOR circuit breaker on the copilot's circuit breaker panel. MANUAL DOOR HOOK RELEASE Should a malfunction prevent the door hooks from releasing, the hooks can be released from the inside with a ratchet and socket stowed in the cabinet behind the pilot's or copilot's seat. To manually release the door hooks: 1. Peel back carpet on the aft lower doorstep and snap out access cover. 2. Slip ratchet and socket over hex shaft and rotate shaft until hooks are released. EMERGENCY EXITS The cabin window adjacent to the wing leading edge on the right hand side of the cabin serves as an emergency escape exit. This win- dow is equipped with internal and external release handles. To re- lease the window from the inside, grasp and pull up on the red han- dle marked EXITPULL-LIFT, then pull the window into the cabin. To open from the outside, depress the button marked PUSH, rotate the handle down, then push the window into the cabin. The upper por- tion of the cabin door is also utilized for emergency egress. PM-121 7-3 Original Pilot's Manual Learjet 31A EXTERNAL DOORS External doors are installed to provide maintenance and servicing ac- cess. The nose area forward of the cockpit is accessible through left and right hand nose cowl doors. The tailcone is accessible through the tail- cone access door located on the bottom of the aircraft in the tailcone ar- ea. Single-point fueling control panel and filler are accessible through a door on the fuselage below the right engine. Oxygen system servicing is provided through an access door located either on the right side of the nose compartment or the right side of the dorsal inlet depending upon the location of the oxygen bottle . Engine oil system servicing is provided through an access door located on the outboard side of each engine cowl. These doors should be checked for security before flight. EMERGENCY EQUIPMENT HAND FIRE EXTINGUISHER A two-pound (.91-kilogram) Halon 1211(BCF) fire extinguisher is gen- erally located in a cabinet behind the pilot's or copilot's seat, and is ac- cessible to crew members and passengers. To operate the extinguisher, remove it from the quick-release bracket and hold upright by the hand- grip. Slide the safety thumb latch forward and squeeze the lever with the palm of the hand. An indicator disc will eject from the rear of the operating head and extinguishant will be released from the nozzle. Re- leasing the lever closes a secondary seal, thus retaining part of the charge to deal with flash-back or re-ignition. FLOTATION EQUIPMENT Life vests are provided at each crew and passenger seat station. The life vests are inflated by pulling the red CO2 release tabs or orally by using the manual inflation tubes. HATCHET An emergency hatchet is either stowed in the cabinet behind the copi- lot's seat or under one of the crew seats. 7-4 PM-121 Change 3 Learjet 31A Pilot's Manual DRAG CHUTE (OPTIONAL) The drag chute provides a significant additional safety feature when operating on other than ideal runway conditions . Proper utilization of the drag chute on wet or icy runways can reduce stopping distance in most cases to a length equal to or less than that for dry concrete . Maxi- mum performance benefit will be achieved in the unlikely event of an aborted takeoff or a landing with complete hydraulic failure. The great- est deceleration is produced at the highest speed; however, the chute is still effective at speeds below 60 knots. Because the chute lanyard is at- tached near the aircraft center of gravity, weather vaning is minimized when the chute is deployed under crosswind conditions . The chute mechanism includes inadvertent deploy safety features. With the de- ploy handle in the stowed (down) position, the chute lanyard is un- locked from the aircraft structure. Accidental release of the chute in this condition would result in immediate separation of the chute from the aircraft. Should the chute be inadvertently deployed while airborne, the chute will fail at speeds in excess of approximately 167 knots. DRAG CHUTE HANDLE The DRAG CHUTE handle, on the right-side of the pedestal, controls the drag chute deploy and jettison functions. To deploy the drag chute, "squeeze" the handle firmly to release the handle locks and, without hesitation, pull handle to full extension. Pulling the handle to full ex- tension requires approximately 50 pounds (222 newtons) of force. To jettison the chute, after deployment, squeeze handle firmly and push the handle full down. It is recommended that the aircraft be headed into the wind to avoid fouling the chute on the aircraft. For detailed op- erating instructions, limitations, and preflight check, refer to the FAA Approved Drag Chute AFM Supplement . PM-121 7-5 Change 3 Pilot's Manual Learjet 31A MISCELLANEOUS EQUIPMENT MONOGRAM Toilet This flush-type toilet may be installed in the aircraft as optional equip- ment. The flush cycle is initiated by pressing the Press to Flush button on the seat and shroud assembly. Flushing continues until the push button is released. During the flushing cycle, flushing fluid is pumped from the waste tank to the bowl by the self-priming pump assembly. The flush fluid enters the bowl and washes the inner surface of the bowl. Waste is carried to the waste tank through the knife valve below the bowl. Caution: When servicing the toilet, any spillage should be cleaned immediately from contact with surrounding structure. Servicing of the toilet is accomplished by removing the tank assembly located at the bottom of the bowl. The tank assembly detaches from the toilet at the front of the unit. Two fasteners, one on each side of the knife valve, secure the installed tank in the sealed position against the bot- tom of the bowl. Detach and drain the flush line at the quick disconnect, depress the two fasteners, and pull the carrying handle. The tank may now be easily removed for servicing . The toilet receives 28 VDC supplied through the 10-amp TOILET cir- cuit breaker on the CABIN PWR BUS (overhead panel between the two crew members). ALAMO Toilet This flush-type toilet may be installed in the aircraft as optional equip- ment. The flush cycle is initiated by closing the toilet seat cover. A flap will automatically close, thereby sealing the waste container. Flushing fluid is pumped from the reservoir around the bowl and back to the res- ervoir. Caution : When servicing the toilet, any spillage should be cleaned immediately from contact with surrounding structure. Servicing of the toilet is accomplished by removing the sealed waste container from the toilet assembly. Lift the strap at the rear of the lid as- sembly to the full open position . Remove waste container sealing lid from bracket and snap into place on waste container. Remove waste container and dispose of contents. The toilet receives 28 VDC supplied through the 10-amp TOILET cir- cuit breaker on the CABIN PWR BUS (overhead panel between the two crew members) . 7-6 PM-121 Change 3