Spacelog Apollo 13

Right-o.

Aquarius, Houston.

Aquarius, Houston.

Go ahead, Houston.

Jim, on the battery problem, we have determined that it is not overcurrent or reverse current. We suspect it's over-temp, but don't know for sure, so we're going to watch it for awhile.

Aquarius, Houston.

Go ahead, Houston.

Jim, Charlie has some procedures to read up for you here; I think you'll need your activation checklist, if it's handy.

Aquarius, that's the contingency checklist.

Okay. I'll just—Okay. Stand by, Charlie.

Okay, Charlie. I've got the contingency checklist, and standing by.

Okay, Jim. We'd like you to turn to page—page 24, which is the “30-Minute Activation,” and this is going to be a procedure for the mid-course burn that we got coming up at 105 with the AGS up. Over.

Roger. On the midcourse at 105, and I'm on page 24.

Okay; “30-Minute Activation,” omit steps 1, 2, and 3; perform step 4, “RCS system A/B-2.” Over.

Roger. Omit steps 1, 2, and 3; perform step 4.

Roger. And on the “EPS Activation,” same page, perform step 1; and in step 2, perform line number—line number 6, “EPS DISPLAY-CLOSE.” Over.

Okay. On “EPS Activation,” perform step 1, and perform step 2, line 6 only; is that correct?

That's affirmative, Jim. The rest of the stuff is already closed at this time, so that's all we'll have to do is close the EPS DISPLAY breaker.

Okay.

All right. Turn to page 25. On page 25, omit step 3; perform step 4. On step 4, last line, scratch “CB(16) EPS: INVERTER 2, closed.” Over.

Roger. Omit step 3; perform step 4, except for the last line. Circuit breaker 16, EPS INVERTER 2, closed.

Roger. That's correct. On step 5, perform step 5. Under “Primary Glycol Loop Activation,” step 1, line 1, “CB(16) ECS: DISPLAY—CLOSE.” That's a crew option; you can have it if you want to. Omit the rest of step 1 and step 2. Perform step 3. Over.

Okay. On primary glycol loop activation, crew option on step 1, first line; the rest of it we'll omit. Step 2, we'll omit, and we'll do step 3.

That's affirmative, Jim, with the following DELTAs on step 3, and if you'll turn to page 26, I'll give you the DELTAs on the activation circuit breaker list. Over.

Okay. I'm there.

Roger. On line 1, correction, row 1, under AC BUS A: TAPE RECORDER should be open; DECA GIMBAL, open. All the other ones as shown on the page. Over.

Okay. On row 1, AC BUS A: TAPE RECORDER and DECA GIMBAL will be open. All the rest as shown.

Roger. And we don't know the status of your windows. If you—During this burn, we're going to have to look out the forward window to get the alinement with the COAS, so you might need the commander window heater and you can, of course, use that breaker if needed, since we do have the AC power. On row 2—Go ahead. Over.

I don't think we'll need it, Charlie.

Okay; fine, Jim. On row 2, under RCS SYSTEM A: ASCENT FEED 2 and ASCENT FEED 1 should be open. Under FLIGHT DISPLAYS: MISSION TIMER should be open; GASTA, open; ORDEAL, open. Under AC BUS A: GASTA, open. The rest are as shown on the page. Over.

Okay. On row 2, we're going to open up ASCENT FEED 2 and ASCENT FEED 1 under RCS SYSTEM A. We're going to open up the MISSION TIMER, and FLIGHT DISPLAYS: the GASTA and the ORDEAL; and the AC BUS A: the GASTA.

That's affirmative. Okay. Row 3, under PROPELLANT: DESCENT HELIUM REG/VENT should be open. Under HEATERS: RENDEZVOUS RADAR STANDBY, open; LANDING RADAR, open. Under STAB/CONTROL: ATCA (PGNS), open. Under ED and LIGHTING: all four open. Over.

Okay. Row 3, under PROPELLANT—propulsion: the DESCENT HELIUM REG/VENT will be open: the STANDBY RENDEZVOUS HEATER will be open and the LANDING RADAR HEATER circuit breaker will be open. I just changed antennas; and, keeping on down the line, ATCA PGNS will be open and the last four circuit breakers, two under ED and two under LIGHTING, will be open.

That's affirmative. Okay. Under row 4, under ECS: GLYCOL PUMP AUTO TRANSFER, close. Under COMM: UP DATA LINK, open; VHF B and VHF A should be open. Under PGNS: LGC/DSKY, open; IMU OPERATE, open. Over.

Okay. Under row 4, the AUTO TRANSFER will be close. UPDATA LINK, open; VHF A and B, open; DSKY, open; and IMU OPERATE, open.

That's affirm. On the last row, the only DELTA is under the CROSS TIE BUS and it should be open. Over.

Say that again, Charlie.

Okay. Under the last row, under EPS is the only DELTA and that is under the CROSS TIE BUS. It should go open. Over.

Roger. The CROSS TIE BUS should go open.

That's affirm. Going on to page 27, Activation, panel 16. Under RCS SYSTEM Bravo: ASCENT FEED 1, ASCENT FEED 2 should be open. Under PROPULSION: PQGS should be open; ASCENT HELIUM REG, open. Over.

Okay. Line 1, on panel 16, ASCENT FEEDs 1 and 2 will be open. And the PQGS will be open, and the ASCENT HELIUM REG will be open.

That's affirmative. On the next three rows, we only get the nine DELTAs, so I'll go through the next three rows completely and then you can read those back. Under LIGHTING —

Okay.

Under LIGHTING; FLOOD, open; TRACK, open. Under ED LOGIC—Correction, under ED: LOGIC, open. Under STAB/CONTROL: DESCENT ENGINE OVERRIDE, open. Under ECS: SUIT FLOW CONTROL, open. Under row 3, COMM: DISPLAY, open; VHF A TRANSMITTER, open; VHF B RECEIVER, open. Under ECS: DISPLAY, that's crew option. Last row, under EPS: INVERTER 2, open. Over.

What we're really trying to do is get you in a posture so that when you see the Earth come through the window, you can damp her out and hold—hold the Earth in the window. Proceeding on to the rest of page 29, under “RCS PRESS,” scratch the entire three steps as printed. On page 30, scratch step 4 under the “RCS PRESS.” Over.

Roger. Under “AGS Activation,” well, I included that step on the ASA circuit breaker and we'll do step 1 and 2 under “AGS Activation.” But then we'll scratch steps 1, 2, and 3 under “RCS PRESS” and, on page 30, we'll scratch step 4.

Affirm. Under “DPS PRESS,” step 1, line 1, scratch. Line 4, “DESCENT HELIUM REG 1, talkback barber pole.” Under step 2, scratch; step 3, scratch; “LANDING GEAR DEPLOY,” scratch. Over.

Okay. Under “DPS PRESS,” we'll scratch the first line and we'll have the “DESCENT HELIUM REG, talkback to barber pole.” We'll scratch steps 2 and 3, and we'll scratch the “LANDING GEAR DEPLOY.”

Roger. Now we got, on the back of page 30, Jim, you've got a blank page in your checklist, or should have, and we'd like to add a procedure to get you to burn attitude. Over.

Okay. A procedure to get the burn attitude.

Okay. First statement is a statement: “Verify AGS in OPERATE for 5 minutes.” Then we go to “AGS address 400 plus 5, then 400 plus zero. ATTITUDE CONTROL: PITCH and ROLL to PULSE; YAW, MODE CONTROL. Maneuver using TTCA pitch and roll.” The computer is controlling yaw, but you can override with ACA. You with me? Over.

Okay, Charlie. I'm with you so far.

Okay, Jim. “When in attitude, ACA out of detent to zero error needle. Then set EVENT TIMER,” and we'll give you a countdown on that when you get to that step. Over.

Okay. “When in attitude, ACA out of detent to null needles, and set DET.”

Roger. Now, that—the burn attitude will be coming up on a pad, but, basically, we're looking for a local horizontal retrograde burn, which means, using a COAS, if you put the horizontal line on the COAS on the horns of the Earth and then roll to place the X-axis in the direction of the Sun, we'll—that will put us in both burn attitude; and you can check that via the Sun which will be in the AOT detent 2. Should lie right along the cursor at the top. We'll have some more words on that for you momentarily. Now, I'd like to go on to page 31 if you're ready. Over.

Okay. I figure I have a handle on the attitude, the way the Earth should look in the COAS, and you're going to give me some words on what the Sun would look like in the AOT. Is that right?

That's affirmative, Jim. We haven't got a picture of it yet. It's going to be in the top part of the COAS—Correction, top part of the AOT at the top of the—the top of detent 2 and the top part of the AOT, and it should, in attitude, if you're right on the Sun, should split the cursor, though that roll angle is not too critical; if we're in about 10 degrees, we'll be okay. We—but I think—we think you should be able to get it better than that. On page 31, under the “DPS Burn Technique,” you can scratch the bottom part below the little diagram there since the gimbal is locked. Over.

Understand scratch the bottom part underneath the diagram because the gimbal is locked.

That's affirmative; and, since the gimbal was trimmed out at the big burn yesterday, we should be still through the c.g., and we'd like to make sure that Jack sits in the same place for this burn that he did yesterday. That way, we'll—you should have no trouble controlling attitude. Now I'm ready to go over to page 32. Over.

Okay. Let me see if I have that right, now. You want Jack to sit in the same attitude so that the gimbals are the same place so you don't have trouble controlling attitude. I got it.

Okay. Now on page 32, top of the page, first line, scratch “VERB 76.” Third line, “MODE CONTROL: AGS, ATT HOLD.” At “Minus 6 minutes,” scratch lines 1, 2, and at “Burn Attitude,” scratch “VERB 40 NOUN 20.” Scratch lines 2, 3, and 4. Now at “Burn Attitude,” we want you to do a “400 plus 5” and then a “VERB—a 400 plus zero.” And we have a caution note at this point. Over.

Go ahead.

Okay. The caution is after “400 plus zero”: Do not go out of detent on ACA again." Over.

Okay. After the last “400 plus zero,” “Do not go out of detent with ACA.” Is that correct?

That's a Roger, Jim. What happens is, of course, we set—when you go out of detent, you reset the AGS error needles and you—and you lose your attitude reference. You establish a new attitude reference, and it might not be the burn attitude since, at this point, we're controlling attitude with the TTCA. Now, picking up with the “VERB 37, ENTER,” scratch. Scratch everything down to the “404 plus zero,” and we want you to perform those AGS steps with 404 down through 470. Over.

Okay. We'll scratch everything down to “404 plus zero,” and we'll perform those four steps.

Roger. Turning over to page 33. Minus 4 minutes. Okay. Moving down the page, it's about line 7, to “ENGINE GIMBAL”: “ENGINE GIMBAL, OFF.” Down to “MODE CONTROL,” make that read “MODE CONTROL: AGS, ATT HOLD,” and then scratch “PROPELLANT QUANTITY MONITOR, DESCENT 1.” Over.

Okay. At 4 minutes, “ENGINE GIMBAL” will be “OFF”; “MODE CONTROL” will be to “AGS, ATT HOLD”; “PROPELLANT QUANTITY MONITOR, DESCENT 1,” scratched.

Roger. Picking up at minus 1 minute, scratch “MASTER ARM, ON.” Minus 35 seconds, scratch first two lines. At minus 10 seconds, change that to “Minus 9 seconds”; so, at “Minus 9 seconds,” it will be “Manual Ullage.” At 2 seconds, scratch “CMC MODE, FREE,” and scratch “ACA out of detent.” At—after “IGNITION,” at plus 1 second, “Terminate Ullage.” Are you with me? Over.

Okay. At 1 minute, “MASTER ARM,” we scratch. At 35 seconds, scratch the first two lines. “Manual Ullage” will start at 9 seconds; we're scratching the blocks at 02 seconds; and the line beneath that, at plus 1 second, we “Terminate Ullage.”

That's affirm. Picking up at plus 5 seconds; scratch the rest of the page. “TTCA, attitude control; and MASTER ARM, OFF.” Over.

Scratch the remainder of the page.

Okay. Now, like to verify that under the 35 seconds, minus 35 seconds, the only thing you have remaining is “ENGINE ARM to DESCENT.” Over.

That's affirm. That's the only thing I have.