Review of Handbook Chapters Pat Cahill [email protected].

Review ofReview ofHandbook Handbook ChaptersChapters

Pat CahillPat [email protected]@FAA.gov

Chapter 4Chapter 4: Aircraft Wire : Aircraft Wire TestTest

RecommendationRecommendation: Include the : Include the need for a special tool to test fiber need for a special tool to test fiber optics.optics.

FAA ResponseFAA Response: We will look in to : We will look in to this matter. We have not conducted this matter. We have not conducted any (flammability) testing of fire any (flammability) testing of fire optic wire/cable at the Tech Center.optic wire/cable at the Tech Center.

Chapter 7Chapter 7: Seat Test : Seat Test (7.3.2.4)(7.3.2.4)

RecommendationRecommendation: Change : Change pressure regulator tolerance from pressure regulator tolerance from +/- 0.038 liter/hour to +/- 0.38 +/- 0.038 liter/hour to +/- 0.38 liter/hour.liter/hour.

FAA ResponseFAA Response: Agree.: Agree.

Chapter 7Chapter 7: Seat Test : Seat Test (7.7.3)(7.7.3)

RecommendationRecommendation: Delete “or : Delete “or greater” in the third sentence.greater” in the third sentence.

FAA ResponseFAA Response: Sentence is : Sentence is incorrect as written in the handbook. incorrect as written in the handbook. It should read, “10 BTU’s/ft It should read, “10 BTU’s/ft22 or or greater.” This is based on response greater.” This is based on response from labs and industry on the from labs and industry on the difficulty of achieving the specified difficulty of achieving the specified flux even with a tolerance.flux even with a tolerance.


RecommendationRecommendation: Add tolerances to the 7 : Add tolerances to the 7 thermocouple temperatures.thermocouple temperatures.

FAA ResponseFAA Response: Two thermocouples are : Two thermocouples are allowed to be equal to 1750°F (954 °C) or allowed to be equal to 1750°F (954 °C) or greater. No benefit would be derived from greater. No benefit would be derived from adding tolerance to this temperature and this adding tolerance to this temperature and this also applies to the 5 thermocouples required to also applies to the 5 thermocouples required to be 1800°F (982 °C) or greater. It is be 1800°F (982 °C) or greater. It is permissible to have temperature variation on permissible to have temperature variation on all thermocouples as long as they have reached all thermocouples as long as they have reached the minimum temperature requirements.the minimum temperature requirements.


RecommendationRecommendation: Use up to 8 wires to : Use up to 8 wires to secure leather seat components.secure leather seat components.

FAA ResponseFAA Response: From testing performed at : From testing performed at the Tech Center on leather seat test the Tech Center on leather seat test samples, we agree that 1 wire is not samples, we agree that 1 wire is not adequate to restrain them. We are adequate to restrain them. We are requesting input and guidance from requesting input and guidance from industry on:industry on: What is commonly used?What is commonly used? Is the data compromised based on the number Is the data compromised based on the number

of restraining wires used other than 1 wire?of restraining wires used other than 1 wire?


RecommendationRecommendation: Allow chamber air : Allow chamber air speed to be 60 feet/min (1 foot/sec) speed to be 60 feet/min (1 foot/sec) measured at any/all locations. This is a measured at any/all locations. This is a pre-test measurement.pre-test measurement.

FAA ResponseFAA Response: Input from labs that : Input from labs that have any experience with any differences have any experience with any differences in test outcome based on various air in test outcome based on various air speeds would be greatly appreciated. speeds would be greatly appreciated. We currently have no data evaluating We currently have no data evaluating this parameter.this parameter.


RecommendationRecommendation: Reduce the 2-: Reduce the 2-minute warm up time due to minute warm up time due to excessive soot build up.excessive soot build up.

FAA ResponseFAA Response: Testing would be : Testing would be needed to verify that the test results needed to verify that the test results would not be compromised.would not be compromised.

Round Robin 6Round Robin 6

Pat CahillPat [email protected]@FAA.gov

Round Robin 6 ResultsRound Robin 6 ResultsAF denotes After Flame in Seconds.

FP denotes Flame Propagation in Inches.

denotes incomplete data.

AF FP AF FP AF FP AF FP AF FP AF FP AF FP AF FP AF FP1 1.5 1 0 <2 0 0.8 1 4.5* 2 <2 0 0 4 4 0 <22 1.3 1 1 1.75 0 0.8 0 0 2 <2 5 3.5* 1 <23 1.8 1 1 1.5 0 0.8 1 4.0* 3 <2 2 <24 0 1 1 1.75 0 0.8 1 3.5* 1 <2 0 <25 1 1 0 1 1/8 0 0.8 0 1 2 <2 2 <2

*Flash Observed *Flare Observed

AF FP AF FP AF FP AF FP AF FP AF FP AF FP AF FP AF FP1 6.9 1 3 1 3 1.4 9 <2 10 2 3 1.5 14 2 0 1 0 <22 0 7/8 0 1 0 1.2 6 <2 7 <2 16 2 10 2 0 1 10 <23 0 7/8 0 1.5 0 1.2 0 <2 14 2.3 0 1 9 1.5 0 1.25* 0 <24 0 1 0 1.25 0 1.4 0 <2 0 <2 27 2 10 1.75 0 1.25 0 <25 5.7 1 7/8 N/A N/A 7 1.4 0 <2 4 <2 21 2.25 16 2 0 1.25 0 <2

*Little Glows

Lab G

Lab A Lab B Lab C Lab D Lab E Lab F Lab G

Lab H Lab I

Sa

mp

leS

am

ple

Lab A Lab B Lab C Lab D Lab E Lab F

Boyd Foam

Polyimide Film; MPVF Tape

Lab H Lab I

Flame Propagation Flame Propagation TestTest

Radiant Panel AngleRadiant Panel Angle

Angle of panel with the horizontal - Angle of panel with the horizontal - 3030 with no tolerance specified with no tolerance specified

ASTM E 648 Flooring Test calls out ASTM E 648 Flooring Test calls out “nominal” angle of 30+/- 5“nominal” angle of 30+/- 5 (25(25 to to 3535))

Unacceptable tolerance for flame Unacceptable tolerance for flame propagation testpropagation test

Internal ChimneyInternal Chimney Air/propane internal chimney width is 4-½ inches Air/propane internal chimney width is 4-½ inches

board-to-board and 4 inches metal-to-metal board-to-board and 4 inches metal-to-metal (frame)(frame)

Electric panel internal chimney width is 4 inches Electric panel internal chimney width is 4 inches board- to- board and is 3 ¾ inch metal-to-metalboard- to- board and is 3 ¾ inch metal-to-metal

Data from both the air/propane and electric Data from both the air/propane and electric radiant panel test chambers are similar. It does radiant panel test chambers are similar. It does not appear that the ¼ inch difference in width has not appear that the ¼ inch difference in width has an effectan effect

The dimensions (with appropriate tolerances) will The dimensions (with appropriate tolerances) will be amended in the appendix of the Handbookbe amended in the appendix of the Handbook

Construction MaterialsConstruction Materials

Metals, such as stainless steel used in Metals, such as stainless steel used in the construction of the sliding platform the construction of the sliding platform (notably the top flange), and the (notably the top flange), and the retaining frame, should be painted black retaining frame, should be painted black if the surface is shiny. High temperature if the surface is shiny. High temperature paint, such as grill paint is acceptable.paint, such as grill paint is acceptable.

Glass Viewing WindowGlass Viewing Window

The high temperature glass-viewing The high temperature glass-viewing window in the electric radiant panel window in the electric radiant panel test chamber is bigger than the test chamber is bigger than the viewing window in the air/propane viewing window in the air/propane test chamber. It consists of 2 pieces test chamber. It consists of 2 pieces of glass opposed to the multiple of glass opposed to the multiple rectangular pieces in the rectangular pieces in the air/propane chamber. Based on air/propane chamber. Based on testing in both chambers, the glass testing in both chambers, the glass size does not appear to be a size does not appear to be a significant variable.significant variable.

ThermocoupleThermocouple

The thermocouple sheathing The thermocouple sheathing material is not specified in the Rule. material is not specified in the Rule. Since it is not rigid, the Since it is not rigid, the thermocouple can be moved thermocouple can be moved inadvertently. This will be inadvertently. This will be addressed in the appendix of the addressed in the appendix of the Handbook.Handbook.

Review of Handbook Chapters Pat Cahill [email protected].

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Transcript of Review of Handbook Chapters Pat Cahill [email protected].