Bombardier-Challenger_01-Fire_Protection庞巴迪挑战者防火

航空发表于 2010-5-9 09:00:01

Bombardier-Challenger_01-Fire_Protection
 
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航空发表于 2010-5-9 09:00:13

canaaatr ctiauencjer OPERATING MANUAL PSP 601A-6 SECTION 9 FIRE PROTECTION TABLE OF CONTENTS Page 1. GENERAL 1 2. FIRE AND OVERHEAT DETECTION 1 A. Fire Sensing Cables 2 B. Fire and Overheat Detection Units 2 C. Operation 2 D. Fire Warning Circuit Testing 3 E. Engine Jet Pipe/Pylon Overheat Detection System 3 (1) Operation 3 (2) System Testing 3 3. APU AND POWER PLANT FIRE EXTINGUISHING 4 A. APU Fire Extinguishing 4 B. Power Plant Fire Extinguishing 4 C. System Operation 4 D. System Reset 4 LIST OF ILLUSTRATIONS Figure Number Title Page 1 Power Plant Fire and Overheat Detection Zones 5 2 Fire Warning and Fault Detection 6 3 Power Plant Zone B Overheat Warning and Fault Detection 7 4 Fire Extinguishing System Discharge Lines - Schematic 8 5 Fire Extinguishing Controls and Firex Monitor Panel 9 6 APU Fire Detection and Extinguishing Sequence 10 7 Power Plant Zone A Fire Detection and Extinguishing Sequence 11 9-CONTENTS Page 1 Apr 02/87
canadair ctianencter OPERATING MANUAL PSP 60M-6 SECTION 9 FIRE PROTECTION 1. GENERAL Fire protection, consisting of f i r e detection, warning and extinguishing, is provided by two independent systems: one for the auxiliary power unit (APU) and one for the two power plants. Each system includes f i re detection and extinguishing electrical circuits. The f i re extinguishing agent (Firex) bottles, two for the power plants and one for the APU, are located in the rear fuselage equipment bay. Both systems are capable of detecting false fire warning signals generated by electrical shorts in the sensing cable circuits. The malfunctioning circuit is automatically isolated and a warning light in the flight compartment comes on to indicate a f i r e detection failure. Titanium firewalls on the engine pylon serve to isolate the power plant fire zones from the adjacent aircraft structure. The fuel, hydraulic and engine bleed air lines are all isolated from the power plant f i r e zones by shutoff valves located on the inboard side of the firewall. The APU is surrounded by a banadized aluminum enclosure designed to contain an APU f i r e. A separate system for overheat detection in the engine jet pipe and pylon area aft of the engine firewall is provided. 2. FIRE AND OVERHEAT DETECTION (Figure 1) Fire and overheat detection is provided for five detection zones, two for each power plant and one for the APU. The power plant f i r e zones are: the area within the core cowling and around the engine combustor section, designated zone A; and the area around the engine jet pipe and a part of the pylon assembly behind the firewall, designated zone B. The APU f i r e zone is the area within the APU fireproof enclosure. Heat sensing cables are routed through the f i r e zones and are connected to fire or overheat detection units in the flight compartment. The detection units discriminate between valid f i r e warnings and system faults and cause either warning or fault warning lights to come on in the flight compartment. SECTION 9 Page 1 Apr 02/87 chattenaer OPERATING MANUAL PSP 601A-6 Fire Sensing Cables Each fire sensing cable is a co-axial electrical cable consisting of two conductors, a stainless steel outer conductor grounded to the airframe and an inner conductor connected in a closed loop to a detection unit. The two conductors are separated by a semi-conductor medium which decreases in electrical resistance as temperature increases. When the resistance of the semi-conductor decreases to a preset limit, a warning is sent to the flight compartment via one of the detection units. A single break in a cable does not impair its warning capabilities but if a cable is broken in more than one place, any section between breaks will not function. The left and right power plants each have four fire sensing cables: two connected in series and routed through fire zone A, one routed around the jetpipe in fire zone B and one routed through the pylon in fire zone B. The APU fire zone contains one cable attached to the APU enclosure walls. Fire and Overheat Detection Units Three fire and overheat detection units are installed below the copilot's side console. Two of the units serve the left and right power plant zone A detection zones respectively and the remaining unit serves the APU. Two separate alarm circuits discriminate between valid fire or overheat warnings and false warnings. The system compares the speed and extent of sensing cable resistance change and initiates fire and overheat or fault warnings. Two fire and overheat detection units, identical to those described above, serve the left and right power plant zone B detection zones. Operation (Figures 1 and 2) When a fire or overheat condition occurs in one of the fire zones, it is detected by the associated fire or overheat detection unit and interpreted as either a valid fire warning or as a fault. If a valid fire warning is received, the detection unit causes the appropriate fire warning light to come on and activates the fire warning bell. In addition, if a valid APU fire warning is received, the APU fire or overheat detection unit initiates a shutdown of the APU. The fire warning light and the fire warning bell continue to operate as long as a fire/overheat condition exists. The fire warning bell is silenced via the TONE MUTED switch/light on the copilots side panel. If a fire detection unit detects a false warning signal caused by a short circuit in a sensing cable, it powers the appropriate amber FIRE WARN FAIL light and automatically isolates the defective fire warning circuit. SECTION 9 Page 2 Apr 02/87 ctianencjer OPERATING MANUAL PSP 601A-6 Fire Warning Circuit Testing A fire warning test circuit is used to check the serviceability of the fire detection warning and fault circuits. This test circuit simulates fire conditions in both power plants and in the APU. If the fire detection system is functioning correctly, the usual fire warnings take place. NOTE: The APU fire shutoff relay is isolated from the fire warning circuits when a test is initiated. This permits operation of the APU during testing of the fire warning system. The fire warning test circuit can also check the operation of the fault detection circuits in the detection units by simulating a short in each of the sensing cable circuits. If the fault detection circuits are functioning correctly, the usual fault warnings take place. Engine Jet Pipe/Pylon Overheat Detection System (Figure 3) This system consists of an ENGINE JET PIPE/PYLON panel, two overheat detection units and fire sensing cables in the zone B detection zones. (1) Operation When one of the overheat detection units receives a valid overheat signal from its associated zone B f i re sensing cable, i t causes the appropriate OVHT light on the ENGINE JET PIPE/PYLON panel to come on flashing. The light continues to flash until the overheat condition is corrected by reducing power or shutting down the engine. I f an overheat detection unit detects a short circuit in one of the f i r e sensing cables, the appropriate OVHT WARN FAIL light comes on. The detection unit also isolates the defective overheat warning circuit. (2) System Testing A test circuit is used to check the serviceability of the system. The test is successful if the usual overheat warnings take place. The ability of the system to detect false overheat signals can also be tested by pressing the OVHT WARN FAIL switch/lights. SECTION 9 Page 3 Apr 02/87 ctvanenoer OPERATING MANUAL PSP 601A-6 3. APU AND POWER PUNT FIRE EXTINGUISHING (Figure 4) The power plant bottles are interconnected, which allows both bottles to be used on one power plant if necessary. The APU bottle is completely independent and discharges into the APU enclosure only. Firex bottle low-pressure warning lights and test switches for the bottle discharge cartridges (squibs) are provided (refer to Figure 5). A. APU Fire Extinguishing (Figure 4) The APU Firex bottle is clamped to the rear fuselage structure above the left side of the APU enclosure and charged with Halon 1301. a non-toxic and non-corrosive fire extinguishing agent* pressurized by dry nitrogen at 600 to 625 psig (at 15°C). The bottle is equipped with a f i l l valve and is protected against thermal overpressure by a pressure relief valve. Discharge is made through a pipe into the rear fuselage bay. A pressure gauge, mounted on the bottle, allows ground service personnel to monitor the charge pressure. A bottle low-pressure warning is also provided in the flight compartment. B. Power Plant Fire Extinguishing (Figure 4) Two Firex bottles for the power plant fire extinguishing system are bolted to the APU support structure in the rear fuselage equipment bay. The bottles are filled with Halon 1301 extinguishing agent pressurized by dry nitrogen at 600 to 625 psig (at 15°C). Each bottle is equipped with a pressure relief and f i l l valve and a pressure gauge, similar to the units on the APU Firex bottle. Two discharge valves are installed on each bottle to permit interconnection of the discharge lines, making i t possible to discharge both the bottles into one power plant i f necessary. The discharge cartridges (squibs) for the power plant Firex bottles are identical to the APU bottle and operate in a similar manner. C. System Operation (Figures 4, 5, 6 and 7) For system operation, refer to the f i re detection and extinguishing sequence, Figures 6 and 7. D. System Reset After a fire warning occurs and the appropriate f i r e warning switch/light (LH or RH ENG FIRE PUSH or APU FIRE PUSH) is pressed, the fire warning and extinguishing system can be reset, i f circumstances warrant, by pressing the f i re warning switch/light a second time which returns the system to the pre-warning condition. The f i re warning light goes out, the f i re warning bell stops and the APU or engine previously shut down can be restarted. Attempting to reset the system with a f i re or overheat condition still present in the affected fire zone(s) results in the immediate reactivation of the fire warning. SECTION 9 Page 4 Apr 02/87 ctianehejer OPERATING MANUAL PSP 601A-6 DETECTION ZONE B (ENGINE JETPIPE/ PYLON OVERHEAT) CORE COWL ENGINE FIREWALL JET PIPE AFT MOUNT RING DETECTION ZONE A Power Plant Fire and Overheat Detection Zones SECTION9 Figure 1 Page 5 Apr 02/87 OPERATING MANUAL PSP 601A-6 LH ENG, RH &iG AND APU FIRE PUSH SWITCH/LIGHTS Each switch/light is electrically connected to a fire and overheat detection unit. Red LH BIG, RH ENG or APU FIRE PUSH lights come on if a valid fire warning is received by the associated fire and overheat detection unit. When pressed in. switch/lights shut down power plants or APU and arm assocaited BOTTLE ARMED PUSH TO DiSCH iightis) (refer to Figure 5). For system operation, refer to Figure 6 and 7. LH ENG FIRE PUSH RH ENG FIRE PUSH GLARESHIELD FIRE WARNING TEST LEFT APU RIGHT FIRE WARN FAIL FIRE WARN FAIL FIRE WARN FAIL FIRE WARNING TEST SWITCH Three-position, spring-loaded toggle switch with the following functions: WARN TEST - Simulates fire condition by grounding the fire sensing cables. Fire warning befl sounds and at) the FIRE PUSH and the BOTTLE ARMED PUSH TO DISCH lights come on. FAULT TEST - Simulates an electrical short in the fire sensing cables. All three FIRE WARN FAIL lights come on. FIRE WARN FAIL LIGHTS Amber FIRE WARN FAIL fights come on if a false warning, generated by an electrical short in a sensing cable circuit, is received by the associated fire and overheat detection unit. Light remains on and faulty detection circuit remains isolated from system until fault is corrected. COPILOTS CONSOLE Fire Warning and Fault Detection SECTION9 Figure 2 Page 6 Apr 02/87 ctiauenc/er OPERATING MANUAL PSP 601A-6 OVHT WARN FAIL SWITCH/LIGHTS Amber lights come on if an overheat warning, generated by an electrical short, in a zone B sensing cable circuit, is received by associated overheat detection unit. Lights remain on and faulty detection circuit remains isolated from system until fault is corrected. Pressing lights test overheat detection circuits. Correct operation of system is indicated by OVHT WARN FAIL lights coming on. OVHT SWITCH/LIGHTS Each switch/light is electrically connected to a zone B overheat detection unit. Red left and right OVHT lights come on flashing if a valid 2one B overheat warning is received by the associated overheat detection unit. Pressing lights test functioning of warning circuit and sensing cable continuity. Correct operation of system is indicated by OVHT lights coming on. CENTRE INSTRUMENT PANEL Power Plant Zone B Overheat Warning and SECTION 9 Fault Detection Page 7 Figure 3 Apr 02/87 RIGHT POWER PLANT DISCHARGE NOZZLES OPERATING MANUAL PSP601A-6 APU APU 'FIREX BOTTLE RIGHT POWER PLANT DISCHARGE UNE FIREX BOTTLES A N D DISCHARGE LINES LEFT POWER PLANT DISCHARGE NOZZLES LEFT POWER PLANT DISCHARGE LINE POWER PLANT LEFT RREX BOTTLES " - M I I I NG LEFT POWER PLANT HREZONE A REAR FUSELAGE EQUIPMENT BAY POWER PLANT RREX BOTTLE 2 DISCHARGE NOZZLE LEFT TWO-WAY CHECK VALVE RIGHT TWO-WAY CHECK VALVE . THERMAL RELIEF DISCHARGE UNE APU FIREX BOTTLE DISCHARGE CARTRIDGE (TYPICAL) \ APU ENCLOSURE TO RIGHT ENGINE Fire Extinguishing System Discharge Lines - Schematic Figure 4 SECTION 9 Page 8 Apr 02/87 OPERATING MANUAL PSP 601A-6 BOTTLE 2 ARMED PUSH TO DISCH BOTTLE 1 AND BOTTLE 2 ARMED PUSH TO DISCH SWITCH/LIGHTS When the appropriate LH or RH ENG FIRE PUSH switch/light is pressed in after a power plant fire warning. BOTTLE 1 and BOTTLE 2 ARMED PUSH TO DISCH lights come on if pressure is associated firex bottles exceeds 225 to 275 psi. After LH ENG FIRE PUSH switch/light is pressed in. pressing either BOTTLE ARMED PUSH TO DISCH switch/light fires the left squib on the associated Firex bottle, i.e. pressing the BOTTLE 1 ARMED PUSH TO DISCH switch/tight fires left squib on Firex bottle 1 and pressing BOTTLE 2 ARMED PUSH TO DISCH switch/light fires left squib on Firex bottle 2. Right squibs are fired in a similar manner rf RH EM6 FIRE PUSH switch/light is pressed in response to a fire condition in the right power plant. APU BOTTLE ARMED PUSH TO DISCH SWITCH/LIGHT Following an APU fire warning, and after the APU FIRE PUSH switch/light has been pressed in. the green BOTTLE ARMED PUSH TO DISCH light comes on if pressure in APU Firex bottle exceeds 225 to 275 psi. Pressing switch/light m fires squib on APU Firex bottle. GLARESHIELD PRESS TO TEST SQUIB SWITCH/LIGHTS When pressed in. test electrical continuity of ignition circuits to both the ignition elements inside the associated squib. Green light comes on if ignition circuit is servicabie. Test current across ignition element is maintained at safe level by switch/light circuit. BOTTLE LOW PRESS LIGHTS Energized by circuits across electrical pressure switches integral with bottle-mounted pressure gauges. Amber LOW PRESS light comes on when associated bottle pressure drops below 275 to 225 psi and remains on until pressure increases to above 450 psi. COPILOTS CONSOLE Fire Extinguishing Controls and Firex Monitor Panel SECTION 9 Figure 5 Page 9 Apr 02/87 OPERATING MANUAL PSP 601A-6 FLIGHT COMPARTMENT INDICATIONS CO CO O —J BOTTLE ARMED PUSH TO DISCH APU FIRE PUSH EVENT RESULT L OUT OUT OUT ON until APU bottle Is recharged I 5 5 5 § - APU FIRE PUSH light comes on. - If aircraft Is on the ground, the APU fire shutoff relay Is automatically energlied to shut down the APU. - BOTTLE ARMED PUSH TO OISCH light comes on. - If airborne, APU fire shutoff relay Is energlied to shut down the APU. - APU squib Is armed. • APU bleed air load control valve closes. - APU fuel shutoff valvea close. - APU squib fires. • FlreN egent starts discharging Into APU enclosure. -Pressure switch on bottle opens as pressure drops below 225 to 278 psl end APU LO PRESS light on Flrex monitor panel comes on. - APU fire goes out. Fire or overheat condition occurs In the APU fire tone. APU FIRE PUSH switch/light Is 1 pressed in. j BOTTLE ARMED PUSH TO OISCH switch/light Is pressed In. APU bottle fully discharges. v CM CO ^ 1 APU Fire Detection and Extinguishing Sequence Figure 6 SECTION 9 Page 10 Apr 02/87 canaaair cftauenQer OPERATING MANUAL PSP 601A-6 Z U ) -JO- II CO 2 O »- < o o 2 CC < fiL Sou X o Oto Z U J HjCC J O . 3 O o 3 o o 3 o 3 o c3 2 o « ^& CD uiOgx X u. cu Z> o o o = .ox 2 O 2 O 3 O o 2 O 2 O 2 O 2 O o 25 O o 2 O 2 O z> o 3 o 3 o Z5 o 2 O 2 O 2 O 2 O 2 O 2 O 3 O Zl ZZ S — © r\ Q c v 3 3 CO c o oma V 3 CD — X CO 3 a. UJ JX u. ENQ X - J c «o 0 £ 2 CB X CO z> U i cc u. © 2 UJ X - J < oX CO o o »- X CO z> CL o UJ 5 cc < UJ O CD o s w j r CC < Xo CO n o »- X CO 3 CL n UJ 2 <CL CM UJ - J O CO t comes SL rmed. © © © CM * 0 •C CD S O bs of b 3 C «0 *© —J <o «o O V © > > * o 3 -C «D © 3 firewall © —> £= •- © w —- * 2 E & £ • I! • ' © x — © o — x Scl^ . ?tf>«n o ©r*w _ — - a . o SCNO • Jfil «S.uic CL a © o X CO o J i 2 .=r o o - 2 u> s © «• X CO zz • ? • c S . °- © © — C UJ -E"5. £ S tz *& «« Si •-E ^o i5 51 If < 2 t5 co o 0 © «c u dis >. ful _ ttle o CO jO -o . c • © • « • — 0 © © Q. -c _ > • O Q. o © u. a CO • 3 c a. - O •: UJ *E, 2 = < « ~ $ UJ «* d 1 COD ^Or S x: o dis >» ttle ful o CD i — « «•> m Power Plant Zone A Fire Detection and Extinguishing Sequence Figure 7 SECTION 9 Page n Apr 02/87

dul 发表于 2011-2-11 15:20:49

MANUAL 8

MANUAL 8 MANUAL 8 MANUAL 8 MANUAL 8 MANUAL 8 MANUAL 8

qiushengsean 发表于 2011-3-1 03:59:48

好好学习
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bocome 发表于 2011-7-31 10:26:44

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Bombardier-Challenger_01-Fire_Protection庞巴迪挑战者防火

MANUAL 8