Federal Aviation Administration OSU & NBS March Materials Meeting Materials Working Group Michael Burns, FAA Tech Center June 17 th & 18 th, 2008

Federal AviationAdministration

OSU & NBSMarch 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



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



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



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



7800 Panel - TIME TO PEAKAVG 41, %STDEV 18.6%

0

10

20

30

40

50

60

W A O R BB L

Lab Code

Sec

on

ds



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



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



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

Se

co

nd

s



NBS Test Results



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



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



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



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



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



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



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



QUESTION & ANSWER

ANY QUESTIONS, COMMENTS OR SUGGESTIONS?

Documents

Federal Aviation Administration OSU & NBS March Materials Meeting Materials Working Group Michael Burns, FAA Tech Center June 17 th & 18 th, 2008