Q A_dtd_08062013.pdf

FA8533‐13‐R‐30278

Questions & Answers dated 8/6/2013

Question 1: Each type of unit (One LOX unit and One LIN unit) will be built for First Article Inspection per the contract, inclusive of evaluation with LOX in one system and separately LIN in the other system. Both of these units will be identical with the exception of the fill connection, service connections and paint/markings. Please confirm both first article units have to go through all the environmental testing (which includes vibration, emergency landing shock, temperature operation & storage, humidity, slat fog, rain, sand, dust, wind and ice accretion) and no submission of any of these tests can be done by similarity between the two. Is this correct?

Answer 1: See Amendment 0002. Only one type of unit, the Liquid Oxygen tank (LOX), shall be used for the environmental testing during First Article test.

Question 2: Test Paragraph 4.7.7 is a 7 day vacuum retention test that is performed on every production unit. The test paragraph further defines that during the 7 day vacuum retention test the production unit shall be subjected to vibration of not less than 30 minutes duration in one plane. Please confirm that every production unit will see this vibration during the 7 day vacuum retention test. Is this correct?

Answer 2: Yes, In accordance with the PD, paragraph 4.7.7, the vacuum portion of the test is for every production unit.