Ken Mattingly

That's correct. And EMERGENCY CABIN PRESSURE valve to BOTH.

Jack Swigert (CMP)

EMERGENCY CABIN PRESSURE to BOTH.

Ken Mattingly

That's correct; and the SUIT DEMAND REGs to BOTH.

Jack Swigert (CMP)

SUIT DEMAND REGs to BOTH.

Ken Mattingly

That's correct. Okay, now we're going to panel 5: circuit breaker ECS TRANSDUCERs, PRESSURE GROUP 1 and 2, MAIN A and MAIN B. That's four circuit breakers, closed.

Jack Swigert (CMP)

ECS TRANSDUCERs, GROUP 1 and 2, MAIN A and MAIN B, four, to close.

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Ken Mattingly

That's correct. Okay, now. Circuit breaker ECS TRANSDUCER, TEMPERATURE, MAIN A and MAIN B, that's two of them, closed.

Jack Swigert (CMP)

CB ECS TRANSDUCER, TEMPERATURE, MAIN A and MAIN B, closed.

Ken Mattingly

That's correct. On panel 4: PRIMARY ECS GLYCOL PUMPS, one, to AC 1.

Jack Swigert (CMP)

Primary ECS GLYCOL PUMPS to 1, AC1.

Ken Mattingly

That's correct. Okay, then we'll finish going back to the tunnel vent, and verify the LM/CM DELTA-P and make sure it's been holding pressure. And we'll come back again and rehash all of the hatch integrity check and tunnel vent procedures with you. The next thing I want to read off is the EI minus 1 plus 20. We'll go to panel 7: BMAG number 1 POWER to WARM UP.

Jack Swigert (CMP)

BMAG number 1 POWER to WARM UP.

Ken Mattingly

That's correct. Then at EI minus 1 plus 10, we'll perform SCS powerup per checklist, page G/2-4.

Jack Swigert (CMP)

Okay. Perform SCS powerup per G&C checklist, page 2-4.

Ken Mattingly

That's correct. Okay, on panel 4: SUIT COMPRESSOR NUMBER 2 to AC1.

Jack Swigert (CMP)

SUIT COMPRESSOR 2 to IC1.

Ken Mattingly

That's correct. SPACECRAFT CONTROL to SCS.

Jack Swigert (CMP)

SPACECRAFT CONTROL to SCS.

Ken Mattingly

Okay. And your MANUAL ATTITUDE switches, as you desire. We're coming up on jettison of the LM, so that's just like separation.

Ken Mattingly

Okay. And we'll do a GDC aline.

Jack Swigert (CMP)

Okay. Perform a GDC aline.

Ken Mattingly

Okay. On panel 8: ROTATION CONTROL POWER, DIRECT, 1 and 2, MAIN A/MAIN B.

Jack Swigert (CMP)

Okay. These are circuit breakers, ROTATION CONTROL POWER, DIRECT, 1 and 2, MAIN A and MAIN B, closed.

Ken Mattingly

Okay, Jack. I was thinking switch. Let me verify that's a circuit breaker, too. I think we have to get both of them.

Jack Swigert (CMP)

Okay, there's those four circuit breakers over there, Ken. When you said panel 8, that's what I thought you were talking about. I don't think the circuit breakers are out right now, but why don't we just put—verify the circuit breakers and put the switches to MAIN A/MAIN B.

Ken Mattingly

Okay, that's correct, Jack. Okay, at EI minus 1 hour, we're going to be doing the LM jettison; so just prior to that, we want to do a P47.

Jack Swigert (CMP)

Okay, say at about 1 minute prior to LM jettison, huh?

Ken Mattingly

Yes, just something that's comfortable for you.

Ken Mattingly

All right, after we've? done that, we want to get panel 8, SEQUENTIAL, PYRO ARM, two of them, ON.

Jack Swigert (CMP)

Okay. I get a GO from MSFN for this?

Ken Mattingly

Okay, John says we can watch it.

Ken Mattingly

All right; the next thing is CSM/LM FINAL SEP, two of them, ON, up.

Jack Swigert (CMP)

CSM/LM FINAL SEP, two, ON.

Ken Mattingly

That's correct. Now we're going back to panel 8, and it's SEQUENTIAL, PYRO ARM, two of them, to SAFE.

Jack Swigert (CMP)

Okay. SEQ PYRO ARM, two, to SAFE.

Ken Mattingly

That's correct, and go back to P00.

Ken Mattingly

All right. And now it's time to configure for single ring.

Jack Swigert (CMP)

Okay. Configure for single ring RCS.

Ken Mattingly

That's right, and since you're still an hour from EI, I guess it wouldn't hurt to use MINIMUM IMPULSE or something like that rather than the DAP, at least not until you get closer down. We'll have the DAP loads for you later.

Ken Mattingly

Okay. And as soon as you've gotten yourself all set up with a good control mode, you want to maneuver to the entry attitude.

Jack Swigert (CMP)

Maneuver to entry attitude per the pad.

Ken Mattingly

That's correct. And we show EI minus 55, which really means when you get to the entry attitude, we have a sextant star check for you. And that will be on the pad.

Jack Swigert (CMP)

Okay. Perform a sextant star check.

Ken Mattingly

Okay. And I want to remind you to park the optics at 90 degrees of shaft.

Jack Swigert (CMP)

Okay. Say again why, Ken. I didn't understand that.

Ken Mattingly

Okay, this is just a precaution, Jack. If we park the optics with a 90-degree shaft angle, that will line up the slits so it gives you the best airflow over that part of the heat shield and avoids a hot spot. If you don't remember it, I don't think it makes much difference. It's just good procedure.

Ken Mattingly

Okay. And after you've got it parked wherever you want it, well, turn the OPTICS POWER OFF and stow the optics.

Jack Swigert (CMP)

Okay. OPTICS POWER, OFF; stow the optics.

Ken Mattingly

Okay, that's good, Okay. The next thing we'll do is to initialize the EMS and that's on entry checklist page 2-1, step number 2.

Jack Swigert (CMP)

Okay, perform EMS initialization per entry checklist page 2-1, step 2.

Ken Mattingly

Okay, that's correct. Now we're coming up on EI minus 45 minutes, and we'll give you an entry pad and a final state vector.

Jack Swigert (CMP)

Okay, at minus 45, entry pad and final state vector from MSFN.

Ken Mattingly

Okay. Now we're going to perform what we call the Moon check. Rather than go into detail, if you already know what we're doing, just say so; otherwise, I'll describe the use of the Moon-attitude set.

Jack Swigert (CMP)

Maybe you better describe it.

Ken Mattingly

Okay, Jack. You remember everybody in the past has commented on seeing Moonset just a couple minutes prior to EI, and your horizon will probably be dark at the time that you get there; you're having an early morning entry; and coming in from the west, you'll still be looking at a dark horizon. So, just as a backup technique, just like you would track the horizon, we're going to give you an attitude which will be on the pad so that you can look directly at the Moon. This is an inertial attitude; it won't be changing, and you'll put the 36-degree window line on the Moon, and then just sit there and watch it. And just prior to EI, the Earth will come up and occult it, and you will then have a good horizon check. And I have some times, and I'll give you that later. And if you just look at this thing now, at that point you can set the GDC or whatever you desire. And you will have a known attitude reference. It's just like a horizon check.

Jack Swigert (CMP)

Okay, I maneuver to the Moon check attitude; at which time I put the 36 window line on the Moon, and just prior to EI, the Earth will occult the Moon.

Ken Mattingly

That's correct. And that corresponds to the same inertial attitude that you'd have on the back of your entry card where it shows the horizon attitude several minutes prior to EI; it's the same thing.

Jack Swigert (CMP)

Yes, that's that one at 17 minutes prior. Okay.

Ken Mattingly

Okay, and we're just getting it in a little closer. Okay, the next item on the check—checklist here is an EI minus 40; we're going to panel 7, and it's BMAG NUMBER 2 POWER to WARM UP.

Jack Swigert (CMP)

Okay, panel 7: BMAG NUMBER 2 POWER to WARM UP.

Ken Mattingly

That's correct. Now, I'd like to verify the SURGE TANK and REPRESS PACKAGES are ON.

Jack Swigert (CMP)

Verify SURGE TANK and REPRESS PACKAGE are ON.

Ken Mattingly

That's correct. On panel 5: circuit breaker ENVIRONMENTAL—CONTROL SYSTEM; WASTE WATER/URINE DUMP HEATER, two of them, closed.

Jack Swigert (CMP)

Panel 5: CB ECS, WASTE H2O/URINE DUMP HEATERS, two, to close.

Ken Mattingly

That's correct. SUIT COMPRESSOR number 2 to OFF.

Jack Swigert (CMP)

SUIT COMPRESSOR 2 to OFF.

Ken Mattingly

That's right, Jack, and what this—what we're planning to do in order to conserve power is we're going to run the suit compressor from an hour to this point at minus 40. And we'll be watching the PCO2; if that thing's working, we'll turn it off at the earliest time that we have a good cabin, and then we'll just leave it off. And in the event that the PCO2 gage isn't working properly or something like that, well, we'll just go ahead and run it for this time frame.

Jack Swigert (CMP)

Okay, that sounds good.

Ken Mattingly

All right. Now we're at EI minus 30. SEQUENTIAL, LOGIC, that's two of them, to ON, up.

Jack Swigert (CMP)

EI minus 30; SEQ, LOGIC, two, ON.

Ken Mattingly

Okay, in panel 7: the BMAG number 2 POWER to ON.

Jack Swigert (CMP)

Okay, we—you only gave that 10 minutes for the warmup, huh?

Ken Mattingly

All right, and FDAI POWER to BOTH.

Ken Mattingly

Okay. And we want to activate the primary evaporator.

Jack Swigert (CMP)

Okay, activate the primary evaporator. All this time, Ken, what've we been getting our cooling? Right now, I think we have the radiators at PULL TO BYPASS.

Ken Mattingly

That's correct. We started out that way, and we turned the glycol pumps on, and we're just circulating it internally. And we're counting on the command module being a heat sink; it's pretty cold soaked, and it looks like this is good enough. You got some relatively low heat loads —

Ken Mattingly

— and we'll keep watching the temps, and if we need it, why we'll start the evaporator early.

Jack Swigert (CMP)

Okay, that sounds good.

Ken Mattingly

Do you believe it's cold up there?

Jack Swigert (CMP)

Yes, and we used to call the command module the bedroom and it's now the refrigerator.

Ken Mattingly

Okay, just don't call it the reefer. Okay. At about EI minus 19, we get back into the standard entry checklist on page 2-2, where it starts with P61.

Jack Swigert (CMP)

Okay, at EI minus 19, we get back into the entry checklist at page 2-2, where we start entering P61.

Ken Mattingly

Okay, Jack. Now that's the—those are the time-line notes I had for you. I hate to tell you this, but I also have a couple of corrections to make to the entry checklist. They aren't corrections, they just are pieces of the entry checklist which will correspond to what I've written—already read to you. And I'm ready to go on that whenever you are. And Vance tells me you can get into the descent water for drinking now.

Jack Swigert (CMP)

We can get into the descent water for drinking, huh?

Jack Swigert (CMP)

Jim would like to know whether the descent water will be good until LM jettison?

Ken Mattingly

Okay, Jack. Looks like we're going to go on the ascent tanks at 128:30. And it looks like —

Jack Swigert (CMP)

Okay, understand. We are going —

Ken Mattingly

— you have plenty of water. I'm sorry we cut each other out; say again.

Jack Swigert (CMP)

Okay, yes. I was going to say, understand we're going to go on the ascent tanks at 128:30.

Ken Mattingly

That's right; based on the current rate, that's what they predict and you can go ahead and drink the water. No sweat.

Jack Swigert (CMP)

Okay, real fine. And I've got the entry checklist out and I'm ready to copy; just give me the page.

Ken Mattingly

Okay. Jack, you're starting to sound like an LMP.

Jack Swigert (CMP)

I think I'm probably the only CMP that's ever witnessed an—a LM burn from inside the LM in—in space flight.

Ken Mattingly

(Laughter) I hope it stays that way. Okay, Jack, we're starting on page 1-1.

Ken Mattingly

Okay, down in the middle of the page on line 9, we're just going to strike out the “Activate VHF for COMM checks,” and line 10, “Verify the DSE.” We're going to leave the DSE OFF, and that's to save power, as is the VHF activation.

Ken Mattingly

Okay, on page 1-2. At minus 2 hours, there's a title “Logic sequence” check; and we're deleting that entire sequence; that's included in what I read up to you.

Jack Swigert (CMP)

Okay, delete the logic sequence check at minus 2 hours there.

Ken Mattingly

That's correct. And delete lines 23, 24, and 25. That means a maneuver to SUPERCIRC entry attitude. Everything below that is deleted.

Ken Mattingly

Okay. Delete lines 23 through 28.

Ken Mattingly

That's correct. You got ahead of me. All right, on line 29 on page 1-3, we're going to put in a time of minus 00:55. That's the time we gave you for the boresight check.

Ken Mattingly

That's your sextant check, really.

Ken Mattingly

Okay, on the top of page 1-4; where it said “1 hour and 15 minutes” next to line 32, we're going to change that to “Minus 2 hours and 30 minutes.”

Jack Swigert (CMP)

Okay, minus 02:30 opposite item 32.

Ken Mattingly

Okay, down at the bottom of the EMS entry check right there where we are, the bottom line now reads, “EMS MODE to STANDBY.” Well, just above that—like to remind you to put a remark, “Do not initialize the range to go.” This is because you're going to come into the EMS entry check, you're going to run through all these things; then we're going to remove power from the EMS. And just didn't want you to get ahead of yourself and initialize the entry parameters, because you'll lose them when we power up.

Ken Mattingly

And, after we go EMS MODE to STANDBY, like for you to add “Circuit breaker EMS, two, to open.”

Jack Swigert (CMP)

Okay, “CB EMS, two, to open.”

Ken Mattingly

That's correct. And we want to delete this “Set up camera” that's listed on the bottom of the page. We're deleting that for power reasons. That's line 33 Alfa.

Jack Swigert (CMP)

Okay, we're way ahead of you. We already got it stowed.

Ken Mattingly

Okay. On the top of the next page where it says “Secondary water EVAP,” just keep in mind we don't plan to use the secondary evaporators unless the primary fails. On line 35 on page 1-5, next to “Command module RCS preheat,” the time is now “Minus 06:30.”

Jack Swigert (CMP)

Okay, “minus 06:30,” and the voltage reading 3.9 still is good, right?

Ken Mattingly

Okay, very good. Under “Final stowage,” the first thing that's listed on line 36, page 1-5, is “Optics.” And if you want to get started on your stowage, we'd like to leave the optics out, because we'll have the star check coming up quite a bit after this. The rest of that stuff can be taken care of at your convenience.

Ken Mattingly

All right, still on pace 1-5, line 37; the time is now “Minus 06:10.”

Ken Mattingly

Okay, and this is one time it looks like we might actually do the preheat, so that's the reason we want to make sure that we know that not more than 20 minutes of time on the preheat. We may not be able to watch it at that time because you aren't powered up.

Jack Swigert (CMP)

Okay. Either 20 minutes or until 3.9 volts DC.

Ken Mattingly

That's correct, Jack. And now let's go to page 1-6. And about one-third of the way down, it shows “Panel 275 CB MAIN A, BAT C, closed,” we want to strike off that line, the next two lines, and we're going to strike out “MAIN A, BAT C, closed; MAIN B, BAT C, closed; and DC INDICATOR, MAIN B.”

Jack Swigert (CMP)

Okay. After that step on panel 275, strike out “CB MAIN A, BAT C; CB MAIN B, BAT C; and DC INDICATORS to MAIN B.”

Ken Mattingly

That's correct. Now reader panel 8, it tells you to “Close all circuit breakers EXCEPT,” and I have four additions. The first one is CB SERVICE MODULE RCS HEATERS, QUAD Charlie, MAIN B, open.

Jack Swigert (CMP)

SERVICE MODULE RCS HEATERS, QUAD Charlie, MAIN Baker, open.

Ken Mattingly

Okay. And the same thing for SERVICE MODULE RCS HEADERS, QUAD Delta, MAIN A, open.

Jack Swigert (CMP)

SERVICE MODULE RCS HEATERS, QUAD Delta, MAIN A, open.

Ken Mattingly

That's correct. And Circuit breaker EMS, that's two of them, open.

Ken Mattingly

All right. And the last is the circuit breakers for SPS GAGING, four of them, open.

Jack Swigert (CMP)

SPS GAGING, four to open.

Ken Mattingly

Okay. And how about our readout on the battery and that charger?

Jack Swigert (CMP)

Okay, BAT's at volts and amps.

Ken Mattingly

That's affirmed. And let's go back to page 1-6, line 41. Let's put in a time “Minus 04:40.”

Ken Mattingly

That's correct. On page 2-1, line number 2, put in a time of “Minus 55 minutes.”

Jack Swigert (CMP)

Okay, minus 55 minutes.

Ken Mattingly

Okay. And the first thing you want to do under “EMS initialization,” is circuit breakers EMS, that's two of them, to close.

Jack Swigert (CMP)

Okay. CB EMS, two, to close.

Ken Mattingly

That's correct. All right. Line 4 or step 4, where it shows “CM RCS check.” That occurs at minus 04:30.

Ken Mattingly

All right. Under “CM RCS checks,” the fourth line down says “MANUAL ATTITUDE, three, to MINIMUM IMPULSE.” We'll have to use “ACCEL COMMAND” and the reason for that, Jack, is we don't have the SPS powered up so there's no minimum impulse generator.

Jack Swigert (CMP)

Okay. MANUAL ATTITUDE, three, to ACCEL COMMAND.

Ken Mattingly

That's correct. And on the same page 2-1, strike out the last three lines, starting with “RCS transfer to service module.”

Jack Swigert (CMP)

Right. The last three lines are scratched out. We ain't got one of those things.

Ken Mattingly

That's correct. Okay, let's flip to page 2-2 and strike out the first two lines.

Jack Swigert (CMP)

Okay. Now wait a second. I need to give you volts and amps, Ken.

Ken Mattingly

All right. Go ahead.

Jack Swigert (CMP)

Okay. It's 39.6, 1.12.

Ken Mattingly

Sounds like you're getting there. Okay. I believe we scratched out the first two lines on 2-2. Now, we're—right below that, it says “Separation checklist.” So we're going to just delete that whole thing; it's included in the notes I gave you.

Jack Swigert (CMP)

Okay. It's included in the notations.

Ken Mattingly

All right. Line number 7. It says “Maneuver to horizon check attitude.” We're going to call this the “Moon-check attitude” and this is the one we discussed, Jack. The angle of 265 is not correct. I'll have one of those for you first thing in the morning.

Ken Mattingly

Okay. And at the bottom of the page, step number 1. That will be at EI minus 19 minutes, and we're off and running through a normal sequence of events.

Jack Swigert (CMP)

Okay. That sounds good. Ken, I guess if you've read this thing—Is it a comfortable time line? Any areas where you had problems with?

Ken Mattingly

Jack, it is very comfortable. We've run it several times now and, in fact, it's being run right now, again. And we've run it both here at Houston and at the Cape. The only place where you might find that you need to stay ahead of things is during the platform-alinement period, when you're getting ready to close out the LM and then once you get into the command module and jettison the LM, why you're back on a very comfortable time. And, of course, we'll be watching and anything we can do, like keeping track of time for you, we'll remind you of that as we go along.

Jack Swigert (CMP)

Hey, that would be good—that would be good, Ken.

Ken Mattingly

Okay. Let me emphasize, Jack, that 2-1/2 hours is the earliest time we can start in on that powerup stuff. Everything else you can do the way you normally would, where you get as far ahead of the game as you can. But the 2-1/2-hour time is based on saving command module consumables. And if you do that, why we're fat; we've got plenty of time to give you some fans on the water even. So that's the one point you don't want to start early on. I do have a couple of more lines to run through on the entry checklist and two pages in the G&C. And I think that will clean us up.

Jack Swigert (CMP)

Okay, Ken. And G&C checklist now?

Ken Mattingly

Let me finish a couple more things in the entry book. You still got that?

Ken Mattingly

Okay. On—These are just cleanup items, Jack. On page 2-3, it lists how you separate, from the CM/SM SEP and all that, so, obviously, if we're on step 5 at 43 minutes down—that's all deleted. And that gets deleted all the way over onto page 2-4, up to the line where it says “15 minutes.” And at that point, we pick back up and everything. From 15 minutes down is valid.

Jack Swigert (CMP)

Okay. Delete item 5 down to the point where it says “Minus 15 minutes.”

Ken Mattingly

That's correct, Jack. Okay, on page 2-5. The top line where we had “Horizon check,” that's now the “Moonset check” and the time is approximately 57:37. And that's minus 02:23. And that angle that's listed in the book there—177—that's really a horizon time at 2 minutes; we'll have you—can look that up on the back of your entry cue card, and I'll look that number up again for you tonight.

Ken Mattingly

Okay. Another thing is to remember when we begin blackout, which is around 05g, and you can write this in your checklist wherever it's convenient; once we've lost COMM, we're going to go ahead and power down the SCE POWER OFF and the PMP POWER OFF. And we just want to do that after you lose COMM, which comes up around EI. Any time after that, go ahead and secure the PMP and the SCE power.

Jack Swigert (CMP)

Okay. When COMM is lost, SCE POWER OFF, PMP POWER OFF.

Ken Mattingly

That's correct, Jack, and that completes the entry checklist. Let's look at the G&C book.

Ken Mattingly

Okay. Let's go to page 2-1.

Ken Mattingly

Okay, Jack. The second line under “IMU powerup” says “FDAI POWER to BOTH,” and we're going to make that a “1.” The reason we're doing that is, again, to conserve power. There's no reason to drive the second FDAI before we get that information to put on it.

Jack Swigert (CMP)

Okay. “FDAI POWER to 1.”

Ken Mattingly

All right. That's correct. On page 2-2.

Ken Mattingly

Okay. Under CMC powerup, line—or step 2 says “Flashing 3700, ENTER.” The time we're going to use this, Jack, is going to be when you've just brought the computer up and it has a state vector in it that's way back many, many hours ago. So we want to do a VERB 96, ENTER to stop the integration to keep it from just sitting there ambling along. And when the ground gives you a new state vector, why then we can go through P00 and we'll be back in business.

Jack Swigert (CMP)

Okay. You want me to go to VERB 37, ENTER; 00, ENTER; and then do a VERB 96?

Ken Mattingly

When you come up, I guess you're going to—once you get the CMC powered up, you're probably going to be going—you're going to come up in a flashing 37, and if you'll just do a VERB 96, ENTER right there, that will take care of it.

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Spoken on April 17, 1970, 2:30 a.m. UTC (51 years, 7 months ago). Link to this transcript range is: Tweet

Ken Mattingly

All right. And the last one I have for you is on page 2-4.

Ken Mattingly

Okay. Under the SCS powerup, the first line says “AUTO RCS SELECT, 16, to OFF.” Okay. You can just delete that part. On the fifth line, it says “Circuit breaker SCS LOGIC POWER,” that's really “LOGIC BUS, four of them, to closed.” The DELTA-V CG is not important since we are not burning the engine. The “SIGNAL CONDITIONER/DRIVER BIAS POWER” lists “Two to AC 1.” We are going to make that just one of them; make it “SIGNAL CONDITION/DRIVER BIAS POWER, one, to AC 1.” The “BMAG POWER,” which is the third line from the bottom, says “BMAG POWER, two, ON;” we are going to make that just one. We'll bring up number 1, and we'll make “FDAI POWER, number 1” and the last line “AUTO RCS SELECT, 16, enable,” you can strike that off and replace it with “BMAG MODE, three of them, to RATE 1.” You want to try reading that back?

Jack Swigert (CMP)

Okay. Delete “AUTO RCS SELECT, 16, OFF.” Change “CB LOGIC POWER” to “LOGIC THRUST POWER—CBS CS LOGIC THRUST, four, to closed.” Delete “DELTA-V CG,” coming down here “SIGNAL CONDITIONER/DRIVER BIAS POWER, one, AC 1; BMAG POWER, 1, to ON,” and it's the number 1 BMAG. “FDAI POWER to 1; BMAG MODE, three, to RATE 1,” deleting the “AUTO RCS SELECT, 16, to enable.”

Ken Mattingly

That's correct. You've got them all, Jack. Very good. Thank you.

Jack Swigert (CMP)

Thank you. This does it, huh?

Ken Mattingly

Yes, sir. Let's see—just a second—let me check on this hatch and integrity check maybe I can tell you something about that. And I do have an answer to your LM power question about the umbilicals. The umbilicals will be unpowered according to the LM procedures, so if you'd like to disconnect them, you can.

Jack Swigert (CMP)

Okay. I think we will.