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good morning everyone this is our post

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scrub briefing for the cots

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demonstration flight

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and here to talk about what happened

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during the last part of the countdown

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this morning

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is gwen shotwell the president of spacex

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and alan london-moyer the manager for

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the nasa commercial crew and cargo

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program and the cuts program manager

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so we'll begin first with a statement

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from spacex and gwen shawwal gwen thanks

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george

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so we had a uh a nominal countdown right

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until about t minus 0.5 seconds uh

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engine controller noted uh high chamber

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pressure in engine five uh software did

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what it was supposed to do aborted

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aborted

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engine 5 then we went through the

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remaining engine shutdown

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so

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what we're doing now is we are

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de-tanking the vehicle

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safing the flight termination system

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doing what we call a t-tep

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sweeps which basically clears the

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ignition fluid and we should have some

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technicians up into that engine about

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noon today

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we'll be out there looking for

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whatever we can find and we'll put out a

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statement as soon as we find root cause

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the attempt next attempt assuming uh

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whatever we see is uh is repairable

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we will go in and try another

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another day on the 22nd we're looking at

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a backup day on the 23rd as well nasa

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has already taken a look at that day and

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is is go we need to make sure the range

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is available though we don't currently

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have the 23rd with the range

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all right thanks gwen

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right so we're looking at the additional

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launch opportunities this 22nd of course

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was looks good that was pre-planned the

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23rd

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looks like it's a good date from the

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trajectory and

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the station crew says they're ready to

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support so

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we believe we'll have a good day on the

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23rd and then there's a couple days

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after that that look like

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it's a good phasing period so

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we're ready to support when spacex is

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ready to go

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all right

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we'll take some questions now please be

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sure to give your name an affiliation

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when you get the microphone

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and we'll start here in the front with

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marcia

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marsha done associated press from his

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shot well i think you said in your

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opening remark but when did the clock

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actually start to stop when was the

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aboard actually

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called precisely

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sorry t-minus 0.5 seconds

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0.5 half a second left and at that up

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until that point all the all nine

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engines were firing as they were

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supposed to

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engine 5 was increasingly uh engine 5

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was trending uh high okay but it hit the

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abort limit t minus 0.5 okay great all

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we've compared this data to the static

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fighter

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fire data as well and that's one of the

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reasons why we aborted it was out of

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family from static fire was there any

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money seen on number five during the

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all right right here

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um are you can you use your name sorry

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this is clara moskowitz with space.com

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um is it still possible that it was a

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sensor failure or was it definitely an

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over high pressure in that engine this

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does not look like a sensor failure

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and and is this at all similar to any of

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the other glitches you've experienced in

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other countdowns before

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i'm sure we've seen this in uh in engine

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testing i don't recall whether we saw

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this during a static fire or or on the

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pad for flight

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okay right here

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uh sawyer rosenstein for talking space i

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was wondering if it if this were to

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occur during launch how many engines can

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fail for it to still achieve success

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and um yes

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it depends on the phase of flight we

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need to lift off with all nine which is

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why we aborted uh you can lose uh i

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believe up to two flights or excuse me

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two engines and still make your mission

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just not at liftoff and the software all

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worked according to plan for the cutoff

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we cannot blame the software guys for

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all right let's come over here and go to

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brenda mcgary bloomberg news how many

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times have you aborted at this at this

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moment or this juncture i know this is

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obviously this was the third attempted

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launch the falcon 9 did the one and two

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also have a similar abort

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i believe we aborted with pc pressure

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high on engine five during flight one

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actually but uh we had the time the

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this time because of the window that's

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correct that's correct

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david hirsch with nhk a quick yes no and

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then a follow-up substantive question

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the on the may 22 possible may 23rd date

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you're giving that's pending the text

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going to the pad and finding out what

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happened i'm assuming correct uh there's

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a note from elon earlier that says

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slightly high combustion chamber

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pressure engine five we'll adjust limits

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for a countdown in a few days how do we

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reconcile that information with what

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you're saying well that was early data

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uh a further uh analysis of the data

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that we were able to snatch and take a

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look at looks like it's something we

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want to go in and expect okay and and

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finally obviously to you know today or

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maybe tomorrow we'll wake up and

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there'll be a lot of characterization of

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this as being potentially even a failure

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and i wonder as someone who's kind of

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leading the trend here for commercial

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commercial cargo and potentially

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commercial crew how would you react to

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those sorts of statements yeah this is

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not a failure we aborted with purpose

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it would be a failure if we were to have

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lifted off with an engine trending in

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ken

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gwen um if you had to change the engine

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how long would that take what would that

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involve

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that would take a couple of days we are

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looking at that operation however we do

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have the next vehicle here at the cape

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in our hangar uh so we'll be looking at

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taking engine five off of that vehicle

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and looking at the op to put it on this

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one if necessary

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well that's still the same amount of

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time though isn't it

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if you took the engine off of one rocket

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and put it on the other or

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what are you saying i'm not sure

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that that's a more detailed operation

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than repairing or

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or just clearing this particular engine

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but we're looking at doing that if

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necessary

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thanks

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or let's uh go to the telephones i think

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we have one

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phone in question

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christmas really answered thank you very

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much all right thank you

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any further questions here all right

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let's go to here to uh jay barbary

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jay barbara nbc uh mrs shotwell

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is 23rd launch time would that be 3 21

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a.m and could you tell us at what time

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what part and after the launch how many

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plus seconds would it be that you could

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continue uh flying with say eight

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engines and then uh uh seven engines you

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say you have to have all nine to lift

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off but along somewhere along there you

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can get along with eight and then you

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can get along with seven can you tell us

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where that is you know i can't tell you

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right now jay but i'll i'll get back

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with you on that

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launch time for the 23rd it's about

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that's correct launch time on the 22nd

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is 3 44 and you we take off about 20

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minutes each day so 321 is that right

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three i think it's 23 is that correct

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321a do you have it i don't know i don't

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have it with me but it's approximately

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the right time frame all right thank you

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all right um

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james you have a question james

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okay all right right here jason power

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with wired can you just clarify again

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were all nine engines

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did the ignition begin for all nine

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engines and that was the flash we saw

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and

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that is correct we had uh nominal

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ignition for all nine

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and all

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engines with the exception of engine

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five

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fine and then started trending high pc

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all right uh any further

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questions

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all right one right here in the front

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with a valencia voice i'm just curious

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since it came down to 0.5 seconds before

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the launch does the uh did the rocket

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lift off at all like did it raise it all

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or just stay down no

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we hold the vehicle down with purpose to

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watch for this exact

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uh this exact issue you want just like a

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pilot at the end of a runway revs the

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engines and looks at the gauges we were

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revving the engines we were looking at

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the gauges and we decided not to fly

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okay uh

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thanks um irene klotz with uh reuters

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for gwen i know it's kind of early for

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rocket school but typically what sorts

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of things might cause this kind of high

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pressure reading thanks

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high pressure coming from high

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temperatures which is like likely low

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fuel

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well the valve if the valve wasn't

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opened although we checked i was able to

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check that before i came over it looks

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like the pre-valve fuel pre-valve open

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was fully open

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um so now we're just going to have to go

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in and spend a little bit more time

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mark ratterman with talking space is the

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inspection you talk about doing later

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today is that a visual is that

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involved disassembly is how how

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complicated is that inspection of that

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engine

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we can we'll do a visual obviously up in

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the chamber look at the fuel ring in the

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penalties i believe we'll probably bore

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scope the pump as well

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we'll only disassemble if we have to

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okay another question right here

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yeah just because the it sounds like

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there was a similarity to to this on the

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first attempt of the falcon 9

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do you get a sense that that there is

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that there's a pattern there that that

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it's it is the valve or that there's

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some kind of similarity between the

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what happened on an earlier mission we

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on flight one uh the uh

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i don't believe the engine was trending

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quite uh the way this one was we had a

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narrow correct we had a narrower abort

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on flight one

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okay marshall you have a follow-up

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we were told you were going to try every

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three days and so now you've got just a

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one-day difference between the 22nd and

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23rd could you explain why 23rd is

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possible now

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when it wasn't really in the mix before

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i did talk about the 23rd as an

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opportunity yesterday in general we have

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very good opportunities every three days

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but it really depends on the trajectory

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of the international space station

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i am not an orbit

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analyst so i can't help you much more

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than that but i'll try to follow up with

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you

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james dean with florida today is is the

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engine swap out if you determine that's

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necessarily the only thing that would

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force you to to

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roll back into the hangar

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or if you do have to roll into the

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hangar does that determine

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what's like does that determine your

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next earliest uh opportunity could you

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still get off on the 22nd or or would

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that push you to we should still number

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days we should be able to roll back into

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the hangar and get back to the 22nd i

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don't want to speculate on what would

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cause us to do that or not i just don't

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have enough data we wanted to come here

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as quickly as we can and get you what

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the information we had but no we could

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we roll back uh we can roll in and roll

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all right any more questions

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all right in that event we did get an

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update from houston if we launch on the

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23rd our launch time would be 3 22 so

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that means on the 22nd 344 on the 23rd

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322.