Point of Contact :Doug Ingerson Department of Transportation Federal Aviation Administration WJ Hughes Technical Center Fire Safety Branch, ATO-P (formerly AAR-440) Bldg 205 Atlantic City Int'l Airport, NJ USA tel: fax: web page: Federal Aviation Administration ~ WJ Hughes Technical Center Fire Safety Branch, AAR-440 ~ Atlantic City Int’l Airport, NJ USA International Aircraft Systems Fire Protection Working Group 23-24June2005London, England Engine Nacelle Halon Replacement

Slide #2 Federal Aviation Administration ~ WJ Hughes Technical Center Fire Safety Branch, AAR-440 ~ Atlantic City Int’l Airport, NJ USA International Aircraft Systems Fire Protection Working Group 23-24June2005London, England PRESENTATION CONTENTS  OVERVIEW OF PENDING ANALYSIS FOR THE OVER- PRESSURE BEHAVIOR IN THE NACELLE FIRE SIMULATOR  BRIEF DESCRIPTION OF PROBLEM  DESCRIPTIONS OF MODIFICATIONS TO TEST FIXTURE  NEW TELEMETRY  DUCT INTERFACE BOX  TEST PLAN  INITIAL OBSERVATIONS  GENERIC STATUS  TESTING REMAINING  TABLE OF CALCULATED EQUIVALENT CONCENTRATIONS

Slide #3 Federal Aviation Administration ~ WJ Hughes Technical Center Fire Safety Branch, AAR-440 ~ Atlantic City Int’l Airport, NJ USA International Aircraft Systems Fire Protection Working Group 23-24June2005London, England OVER-PRESSURE ANALYSIS PENDING OVER-PRESSURE ANALYSIS

Slide #4 Federal Aviation Administration ~ WJ Hughes Technical Center Fire Safety Branch, AAR-440 ~ Atlantic City Int’l Airport, NJ USA International Aircraft Systems Fire Protection Working Group 23-24June2005London, England OVER-PRESSURE ANALYSIS - OVERVIEW  DURING TESTING WITH 2-BTP & HFC-125 ANOMOLOUS BEHAVIOR WAS NOTED IN THE TEST FIXTURE  BEHAVIOR CHARACTERIZED AS AN OVER-PRESSURE AT AN ATMOSPHERIC GAP IN THE FIXTURE  WORST-CASE EXAMPLE RESULTED IN FIREBALL & AUDIBLE SIGNATURE  NO TELEMETRY ORIGINALLY LOCATED IN REGION OF INTEREST  TEST FIXTURE HAS BEEN MODIFIED TO ALLOW COLLECTION OF PERTINENT DATA  DATA TO BE COLLECTED AND SCRUTINIZED TO ASSESS MAGNITUDE AND ATTEMPT AN UNDERSTANDING

Slide #5 Federal Aviation Administration ~ WJ Hughes Technical Center Fire Safety Branch, AAR-440 ~ Atlantic City Int’l Airport, NJ USA International Aircraft Systems Fire Protection Working Group 23-24June2005London, England ~ 123 Inches ~ 240 Inches DUCT INTERFACE. TEST SECTION EXIT = 22” DIA EXHAUST DUCT ENTRANCE = 33” DIA GAP BETWEEN CIRCULAR PLANES = 8” ~ 65 Inches FIRE ZONE AGENT INJECTION OVER-PRESSURE ANALYSIS, PERTINENT TEST FIXTURE GEOMETRY AIR FLOW

Slide #6 Federal Aviation Administration ~ WJ Hughes Technical Center Fire Safety Branch, AAR-440 ~ Atlantic City Int’l Airport, NJ USA International Aircraft Systems Fire Protection Working Group 23-24June2005London, England OVER-PRESSURE ANALYSIS, PERTINENT TEST FIXTURE GEOMETRY DUCT INTERFACE. TEST SECTION ~ EXHAUST NOZZLE RED DUCT

Slide #7 Federal Aviation Administration ~ WJ Hughes Technical Center Fire Safety Branch, AAR-440 ~ Atlantic City Int’l Airport, NJ USA International Aircraft Systems Fire Protection Working Group 23-24June2005London, England OVER-PRESSURE ANALYSIS – FIXTURE MODIFICATIONS  ADDED 4 THERMOCOUPLES IN RED DUCT  ALL ALONG 12:00  STARTED 2 FEET IN FROM INLET, PLACED EVERY 2 FEET  BEADS ARE 8 INCHES OFF WALL  ADDED 2 STATIC PRESSURE MEASUREMENT LOCATIONS  0-5” H2O PSID (REFERENCE TO TEST BAY)  1 POINT IN TEST SECTION, 03:00, STA 522  1 POINT IN RED DUCT SECTION, 04:30, 21 INCHES IN FROM INLET  USING STATIC PORTS OFF 1/8”OD PITOT-STATIC TUBES INSERTED INTO FLOW FIELD

Slide #8 Federal Aviation Administration ~ WJ Hughes Technical Center Fire Safety Branch, AAR-440 ~ Atlantic City Int’l Airport, NJ USA International Aircraft Systems Fire Protection Working Group 23-24June2005London, England OVER-PRESSURE ANALYSIS – FIXTURE MODIFICATIONS  ADDED 4 OPTO-ELECTRONIC DEVICES TO DETECT FLAME PROPRAGATION THROUGH TEST FIXTURE  PHOTODIODE PHOTOCONDUCTIVE CIRCUITS  SENSOR VALUES   0 VDC, DARK/NO FIRE   6.1 VDC, SATURATES WHEN VIEWING FLAMES OF TEST FIRE  1 VIEWS TUBE ARRAY IN FIRE ZONE  REMAINING 3 LOOK AT 12:00  ENTRANCE TO EXHAUST NOZZLE  EXIT OF EXHAUST NOZZLE  RED DUCT  A BOX IS BEING FABRICATED WHICH WILL CLOSE OUT THE DUCT INTERFACE COMPLETELY

Slide #9 Federal Aviation Administration ~ WJ Hughes Technical Center Fire Safety Branch, AAR-440 ~ Atlantic City Int’l Airport, NJ USA International Aircraft Systems Fire Protection Working Group 23-24June2005London, England OVER-PRESSURE ANALYSIS, TELEMETRY LOCATIONS TYPE “K” THERMOCOUPLE STATIC PRESSURE MEASUREMENT PHOTODIODE FLAME DETECTOR BOX TO CLOSE OUT DUCT INTERFACE STA 551 STA 527 STA 502

Slide #10 Federal Aviation Administration ~ WJ Hughes Technical Center Fire Safety Branch, AAR-440 ~ Atlantic City Int’l Airport, NJ USA International Aircraft Systems Fire Protection Working Group 23-24June2005London, England OVER-PRESSURE ANALYSIS – TEST PLAN  PURPOSE :  TO CAPTURE THE ENVIRONMENT OF THE OVER-PRESSURE PRODUCED BY HFC-125  TO CAPTURE THE ENVIRONMENT AS PRODUCED BY HALON 1301  CHARACTERIZE THE MAGNITUDE OF THE ENVIRONMENT  ATTEMPT TO TO UNDERSTAND THE PHENOMENA  PLAN :  FIRE TEST WITH HFC-125 IN CONFIGURATIONS WHERE OVER- PRESSURES WERE PREVIOUSLY OBSERVED  FIRE TEST WITH HALON 1301 IN THE SAME CONDITION  RUN EACH AGENT WITH & WITHOUT THE DUCT INTERFACE BLOCKED OUT  MULTIPLE OVER-PRESSURES WILL BE CAPTURED  MULTIPLE HALON 1301 FIRE TESTS PLANNED TO CAPTURE BEHAVIOR  EXACT TEST COUNT TBD

Slide #11 Federal Aviation Administration ~ WJ Hughes Technical Center Fire Safety Branch, AAR-440 ~ Atlantic City Int’l Airport, NJ USA International Aircraft Systems Fire Protection Working Group 23-24June2005London, England OVER-PRESSURE ANALYSIS – INITIAL OBSERVATIONS  THE FOLLOWING GRAPHS ILLUSTRATE SOME OBSERVATIONS  BASED ON 1.0 lbm/s 260*F VENTILATION, 0.25 GPM OIL SPRAY FIRE, HFC-125 AT “equivalence”  THE FOLLOWING BEHAVIORS WERE OBSERVED :  THIS TEST VISUALLY PRODUCED A “MINOR” OVER-PRESSURE  GRAPH OF FIRE IGNITION, INITIAL VS. REIGNITION AT COMPLETION OF REIGNITION TIME DELAY (RTD)  FLAME FRONT PROPAGATION IS QUICKER DURING INITIAL IGNITION  FIRE GROWTH IS QUICKER DURING REIGNITION  STATIC PRESSURE PULSE IS LARGER FOR REIGNITION  STATIC PRESSURE PULSE IS FRACTIONAL INCH MAGNITUDE  GRAPH OF THE COMPLETE REIGNITION TIME DELAY  FLAME EXTINCTION AT RTD ONSET DOES NOT PROGRESS LOGICALLY  FLAME REIGNITION AFTER RTD PROGRESSES LOGICALLY  STATIC PRESSURE HAS GREATER PULSE DURING FIRE REIGNITION THAN DURING AGENT DISCHARGE  GRAPH OF OVERALL TEMPERATURE BEHAVIOR INDICATES NOTHING UNUSUAL

Slide #12 Federal Aviation Administration ~ WJ Hughes Technical Center Fire Safety Branch, AAR-440 ~ Atlantic City Int’l Airport, NJ USA International Aircraft Systems Fire Protection Working Group 23-24June2005London, England OVER-PRESSURE ANALYSIS – INITIAL OBSERVATIONS, FIRE IGNITION FIRE IGNITION AT START OF TEST NO FIRE FIRE REIGNITION AT THE END OF THE RTD

Slide #13 Federal Aviation Administration ~ WJ Hughes Technical Center Fire Safety Branch, AAR-440 ~ Atlantic City Int’l Airport, NJ USA International Aircraft Systems Fire Protection Working Group 23-24June2005London, England OVER-PRESSURE ANALYSIS – INITIAL OBSERVATIONS, COMPLETE RTD HFC-125 DISCHARGE BEGINS FIRE EXTINCTION FIRE REIGNITION

Slide #14 Federal Aviation Administration ~ WJ Hughes Technical Center Fire Safety Branch, AAR-440 ~ Atlantic City Int’l Airport, NJ USA International Aircraft Systems Fire Protection Working Group 23-24June2005London, England OVER-PRESSURE ANALYSIS – INITIAL OBSERVATIONS

Slide #15 Federal Aviation Administration ~ WJ Hughes Technical Center Fire Safety Branch, AAR-440 ~ Atlantic City Int’l Airport, NJ USA International Aircraft Systems Fire Protection Working Group 23-24June2005London, England OVER-PRESSURE ANALYSIS – INITIAL OBSERVATIONS  THERE ARE NO CONCLUSIONS TAKEN FROM THIS ONE TEST, JUST OBSERVATIONS  MORE TESTING TO BE COMPLETED PRIOR TO ANALYSIS

Slide #16 Federal Aviation Administration ~ WJ Hughes Technical Center Fire Safety Branch, AAR-440 ~ Atlantic City Int’l Airport, NJ USA International Aircraft Systems Fire Protection Working Group 23-24June2005London, England CONCLUSION SUMMARY/STATUS

Slide #17 Federal Aviation Administration ~ WJ Hughes Technical Center Fire Safety Branch, AAR-440 ~ Atlantic City Int’l Airport, NJ USA International Aircraft Systems Fire Protection Working Group 23-24June2005London, England CONCLUSORY STATEMENTS  TESTING REGARDING CHARACTERIZING OVER-PRESSURE BEHAVIOR REQUIRES COMPLETION  REMAINING CF3I EQUIVALENCE ITERATIONS WILL FOLLOW  POOL FIRE WORK  SPRAY FIRE WORK  COLD AGENT TESTING

Slide #18 Federal Aviation Administration ~ WJ Hughes Technical Center Fire Safety Branch, AAR-440 ~ Atlantic City Int’l Airport, NJ USA International Aircraft Systems Fire Protection Working Group 23-24June2005London, England RESULTS TO DATE - TABULAR Agent Ventilation configuration Fire Threat Equivalent Concentration (%v/v) HFC-125 high JP8 spray17.5 JP8 pool7.6 Low OIL spray16.4 (a) JP8 pool8.1 (a) CF3I High JP8 spray5.6 JP8 poolIncomplete Low OIL spray7.2 (a,b) JP8 poolIncomplete (a) Bracketing method used to find mass equivalent (b) Partial result, JP8 verification incomplete as of June 2005