Federal AviationAdministrationOSU & NBS
March Materials Meeting
Materials Working Group
Michael Burns, FAA Tech Center
June 17th & 18th, 2008
2 2Federal AviationAdministration
Materials Meeting - NBS Smoke Chamber / OSUJune 17th & 18th, 2008
Agenda
• Present results of mini round robin
• Any progress to inspection of equipment?
• NBS furnace update
• Photometric System Round Robin
• Next steps
3 3Federal AviationAdministration
Materials Meeting - NBS Smoke Chamber / OSUJune 17th & 18th, 2008
2007 Independent Mini-Study • The follow-on ‘Mini-Study’ has been completed• Review included an on site visit as well as the testing of two
honeycomb panels identified as 7800 and S-SCCP for the OSU and 7700, 7800 for the NBS
• Data presented are tests made prior to repairing any discrepancies that were found during visit– One Lab was able to complete repairs and run panel S-SCCP (OSU)
a second time• OSU data is presented as Peak Heat Release Rate, 2 minute
Total Heat Release Rate, Time to Peak and a one standard deviation bracket
• NBS data is presented as maximum optical density observed during the four minute test and a one standard deviation bracket
4 4Federal AviationAdministration
Materials Meeting - NBS Smoke Chamber / OSUJune 17th & 18th, 2008
7800 Panel - PEAK HRAVG 79, %STDEV 11.1%
0.0
10.0
20.0
30.0
40.0
50.0
60.0
70.0
80.0
90.0
100.0
R W O BB A L
Lab Code
W/c
m2
5 5Federal AviationAdministration
Materials Meeting - NBS Smoke Chamber / OSUJune 17th & 18th, 2008
7800 Panel - TOTAL HRRAVG 90, %STDEV 12.9%
0
20
40
60
80
100
120
O R BB W A L
Lab Code
W/c
m2
6 6Federal AviationAdministration
Materials Meeting - NBS Smoke Chamber / OSUJune 17th & 18th, 2008
7800 Panel - TIME TO PEAKAVG 41, %STDEV 18.6%
0
10
20
30
40
50
60
W A O R BB L
Lab Code
Seco
nds
7 7Federal AviationAdministration
Materials Meeting - NBS Smoke Chamber / OSUJune 17th & 18th, 2008
S-SSCP Panel - PEAK HRAVG 50, %STDEV 13.8%
0.0
10.0
20.0
30.0
40.0
50.0
60.0
70.0
R W O A BB Lab R AfterRepairs
L
Lab Code
W/c
m2
8 8Federal AviationAdministration
Materials Meeting - NBS Smoke Chamber / OSUJune 17th & 18th, 2008
S-SSCP Panel - TOTAL HRRAVG 34, %STDEV 22.6%
0.0
5.0
10.0
15.0
20.0
25.0
30.0
35.0
40.0
45.0
50.0
R O BB Lab R AfterRepairs
A L W
Lab Code
W/c
m2
9 9Federal AviationAdministration
Materials Meeting - NBS Smoke Chamber / OSUJune 17th & 18th, 2008
S-SSCP Panel - TIME TO PEAKAVG 55, %STDEV 28.0%
0
10
20
30
40
50
60
70
80
90
A W O Lab R AfterRepairs
L BB R
Lab Code
Seco
nds
10 10Federal AviationAdministration
Materials Meeting - NBS Smoke Chamber / OSUJune 17th & 18th, 2008
NBS Test Results
11 11Federal AviationAdministration
Materials Meeting - NBS Smoke Chamber / OSUJune 17th & 18th, 2008
Sample 7700 Ds Max during 4 minutesAvg 114, % STD 16.8
0
20
40
60
80
100
120
140
160
L W R A
Lab Codes
Ds
12 12Federal AviationAdministration
Materials Meeting - NBS Smoke Chamber / OSUJune 17th & 18th, 2008
Sample 7800 Ds Max during 4 minutesAvg 221, % STD 6.0
190
195
200
205
210
215
220
225
230
235
240
245
R L O W A
Lab Codes
Ds
13 13Federal AviationAdministration
Materials Meeting - NBS Smoke Chamber / OSUJune 17th & 18th, 2008
Following Mini Study, FAA Requested All Participating Labs to:
• Review mini-study findings posted on the FAA Fire Safety web site– Do you have similar problems (OSU & NBS)?
• Conduct thorough internal review of equipment and procedures
• Review must address the following issues:– List discrepancies found during inspection– Course of action– Estimated completion date for all necessary repairs
• Notify FAA once review is complete
14 14Federal AviationAdministration
Materials Meeting - NBS Smoke Chamber / OSUJune 17th & 18th, 2008
NBS Furnace• FAA has been informed that any
manufacturing defect previously noted has been corrected and that there is no longer a dark eye observed in the center of the furnace
• Updated furnace drawing specifications are nearly complete and will be in the next update of Chapter 6.
• FAA is working with manufacturers of the NBS furnace elements to research better materials that can be used for longer service life
15 15Federal AviationAdministration
Materials Meeting - NBS Smoke Chamber / OSUJune 17th & 18th, 2008
NBS Photometric System Round Robin
• FAA is currently conducting a round robin check out of the NBS Photometric system using neutral density light filters
• These filters provide a linearity check of five data points
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Materials Meeting - NBS Smoke Chamber / OSUJune 17th & 18th, 2008
NBS Photometric System Round Robin
• Tests are conducted without furnace heat or pilot burner operation
• After zeroing then spanning the system, optical density readings are obtained by gradually sliding the filter over the lower glass panel in the chamber
• Information on the light filters can be found on the following web site through Edmund Optics– http://www.edmundoptics.com/onlinecatalog/
DisplayProduct.cfm?productid=1523
• Please contact me if your Lab would like to participate
17 17Federal AviationAdministration
Materials Meeting - NBS Smoke Chamber / OSUJune 17th & 18th, 2008
Next Steps• FAA is in the process of updating Chapter 6
of the FAA Handbook (NBS)– Main focus will address such issues as furnace
specification, Heat flux gage/Radiometer use and photometric system
– Comments on Chapter 6 will be accepted through 8/1/2008
– Chapter 5 (OSU) to follow• FAA Contact Information:
Michael Burns @ [email protected] – +1 (609) 485-4985
18 18Federal AviationAdministration
Materials Meeting - NBS Smoke Chamber / OSUJune 17th & 18th, 2008
QUESTION & ANSWER
ANY QUESTIONS, COMMENTS OR SUGGESTIONS?