Engine Nacelle Halon Replacement, FAA, WJ Hughes Technical Center Point of Contact :Doug Ingerson Department of Transportation Federal Aviation Administration WJ Hughes Technical Center Fire Safety Section, AAR-422 Bldg 205 Atlantic City Int'l Airport, NJ USA tel: fax: web page: International Aircraft Systems Fire Protection Working Group Seattle-Tacoma Airport, WA March 2002 Federal Aviation Administration WJ Hughes Technical Center, Fire Safety Section, AAR-422 Atlantic City Int'l Airport, NJ USA

Three Major Topics for Review : progress/current status presentation of recent data near term plans International Aircraft Systems Fire Protection Working Group Seattle-Tacoma Airport, WA March 2002 Federal Aviation Administration WJ Hughes Technical Center, Fire Safety Section, AAR-422 Atlantic City Int'l Airport, NJ USA

PROGRESS/CURRENT STATUS >Test Fixture #Fuel System iPrior system to heat the fuel and deliver it to the nozzles in the spray fire zone deemed inadequate iReplaced pump for fuel heating; heating time changes from 1+ hours to 20 minutes iReplace pump for spray nozzles w/pressurized ullage system iFuel nozzles will be changed to alter flow rate to the spray fire zone #Fire Extinguisher iEquilibrium system in place iAgent/N2 solubility is a notable phenomena iFirex servicing procedures now account for agent/N2 behavior iDistribution plumbing altered to decrease discharge duration International Aircraft Systems Fire Protection Working Group Seattle-Tacoma Airport, WA March 2002 Federal Aviation Administration WJ Hughes Technical Center, Fire Safety Section, AAR-422 Atlantic City Int'l Airport, NJ USA

PROGRESS/CURRENT STATUS >Test Fixture ( cont’d ) #Hot plates iSpray hot plate failed 15Oct01 ]Process control thermocouples separate from plate; significant overheat results ]Difficulties repaired; operational 7Nov01 iElectrical circuit for the pool hot plate faulted 31Jan02 ]Plate removed, reason for fault found and corrected ]Operational 5Feb02 International Aircraft Systems Fire Protection Working Group Seattle-Tacoma Airport, WA March 2002 Federal Aviation Administration WJ Hughes Technical Center, Fire Safety Section, AAR-422 Atlantic City Int'l Airport, NJ USA

PRESENTATION OF RECENT DATA >Data Presentation #Fire Extinguishing System iProblems w/past distribution results required system evaluation iEvaluation produced the following areas likely causing the difficulty ]Distribution plumbing ]Agent/N2 equilibrium i The resultant changes in the system yielded positive gains in performance ]Increased the the cross sectional area of the discharge pathway for the agent flow ]The single flow split in the discharge pathway changed from a tee to a wye ]Agent/N2 equilibrium behavior calculated (NIST computer program PROFISSY) ]Agent/N2 equilibrium attained prior to test discharge International Aircraft Systems Fire Protection Working Group Seattle-Tacoma Airport, WA March 2002 Federal Aviation Administration WJ Hughes Technical Center, Fire Safety Section, AAR-422 Atlantic City Int'l Airport, NJ USA

PRESENTATION OF RECENT DATA 1.25”OD WYE AS FLOW SPLIT 5/8”OD tube From firex ball valve 1.25”OD TEE AS FLOW SPLIT From firex ball valve 1/2” TUBE BUTT FOR NOZZLES  8” C/L-C/L 1/2”OD tube Within Test Fixture Interior International Aircraft Systems Fire Protection Working Group Seattle-Tacoma Airport, WA March 2002 Federal Aviation Administration WJ Hughes Technical Center, Fire Safety Section, AAR-422 Atlantic City Int'l Airport, NJ USA 5/8” TUBE BUTT FOR NOZZLES NOZZLES FARTHEST FROM CORE RESTRICTED BY 5/8”ODx3/8”ID WASHER

PRESENTATION OF RECENT DATA “Top-off” is the total pressure of the agent/N2 mixture when the system is in equilibrium for the given temperature. International Aircraft Systems Fire Protection Working Group Seattle-Tacoma Airport, WA March 2002 Federal Aviation Administration WJ Hughes Technical Center, Fire Safety Section, AAR-422 Atlantic City Int'l Airport, NJ USA

PRESENTATION OF RECENT DATA International Aircraft Systems Fire Protection Working Group Seattle-Tacoma Airport, WA March 2002 Federal Aviation Administration WJ Hughes Technical Center, Fire Safety Section, AAR-422 Atlantic City Int'l Airport, NJ USA

PRESENTATION OF RECENT DATA >Data Presentation ( cont’d ) #Gas Analysis iAnalyzer completed; known as “Hal2 Rebuilt” iProducing data from transducers as a Direct Current Voltage (VDC) history iSensor signal starts at a maximum value; as gas concentration increases, signal decreases (converse behavior applies) iData manipulation ]Raw signal run through a smoothing routine ]Smoothed data aligned at some consistent signal value ]All 12 channels reviewed as one distribution profile ]Second review of data incorporates the minimum and maximum values for each time increment International Aircraft Systems Fire Protection Working Group Seattle-Tacoma Airport, WA March 2002 Federal Aviation Administration WJ Hughes Technical Center, Fire Safety Section, AAR-422 Atlantic City Int'l Airport, NJ USA

PRESENTATION OF RECENT DATA International Aircraft Systems Fire Protection Working Group Seattle-Tacoma Airport, WA March 2002 Federal Aviation Administration WJ Hughes Technical Center, Fire Safety Section, AAR-422 Atlantic City Int'l Airport, NJ USA

PRESENTATION OF RECENT DATA as of 25Feb02... Ring location ch# - clock position FWD MID AFT 11-12: : : : : : : : : : : :00 International Aircraft Systems Fire Protection Working Group Seattle-Tacoma Airport, WA March 2002 Federal Aviation Administration WJ Hughes Technical Center, Fire Safety Section, AAR-422 Atlantic City Int'l Airport, NJ USA

PRESENTATION OF RECENT DATA International Aircraft Systems Fire Protection Working Group Seattle-Tacoma Airport, WA March 2002 Federal Aviation Administration WJ Hughes Technical Center, Fire Safety Section, AAR-422 Atlantic City Int'l Airport, NJ USA

PRESENTATION OF RECENT DATA International Aircraft Systems Fire Protection Working Group Seattle-Tacoma Airport, WA March 2002 Federal Aviation Administration WJ Hughes Technical Center, Fire Safety Section, AAR-422 Atlantic City Int'l Airport, NJ USA

NEAR TERM PLANS >Test Activity #Gas Analysis iCold agent testing on-going since latter Feb ‘02 ]Difficulty getting agent temperature to -65°F ]Process refined iTesting continuing now (12-15March02) ]Will find acceptable distribution profiles for two air flow conditions ]Air flow conditions => high flow/low temperature & low flow/high temperature iClosure analysis will include : ]Distribution profile measurements at agent storage conditions during fire testing ]Distribution profile measurements for agent storage conditions at depressed temperature International Aircraft Systems Fire Protection Working Group Seattle-Tacoma Airport, WA March 2002 Federal Aviation Administration WJ Hughes Technical Center, Fire Safety Section, AAR-422 Atlantic City Int'l Airport, NJ USA

NEAR TERM PLANS >Test Activity ( cont’d ) #Fire Testing iWill follow on immediately after agent distribution work at depressed temperature is completed (mid-March ‘02) iBasic fire characterizations completed International Aircraft Systems Fire Protection Working Group Seattle-Tacoma Airport, WA March 2002 Federal Aviation Administration WJ Hughes Technical Center, Fire Safety Section, AAR-422 Atlantic City Int'l Airport, NJ USA