Spacelog Apollo 13

Fred, one—one point on the PTC requests that, about an hour or less from now when you make your 90-degree change, that you do it in PGNS AUTO as opposed to ATT HOLD. Reason is that if you're in ATT HOLD, it establishes a new null point each time you stop the—the maneuver. Over.

Okay. You want us to make the maneuver with PGNS AUTO rather than the PGNS ATT HOLD. Is that right?

Yes. That's correct.

And, Fred, advise that it—it is a manual maneuver.

13, Houston. You'd be using X-axis override. It will be a manual maneuver, but with the PGNS AUTO mode.

Okay.

And if you're ready to copy, Charlie is going to be on in a minute with some recommended checklist changes for your upcoming burn. Over.

Okay. Stand by 1.

I'm going to erase this.

Hello, Aquarius; Houston. Do you read? Over.

Yes. Stand by 1 …

Okay. Which book are you going to give me some words in, Charlie?

Houston, Aquarius. Which book do you want us to have out? contingency …?

Houston. This is Houston, Aquarius. Say again. Over.

Houston, Aquarius. Which book do you want me to update here, Charlie, the contingency QR DPS?

Okay, Fred-o, we'd like you to get out the contingency checklist; turn to page 1, the 2-hour activation. Over.

Okay. I'm right there.

Okay. On page 1, the only thing we have to do is EPS Activation, step 2, CB(16) EPS: DISPLAY, CLOSE. Over.

Okay. On page 1, we need EPS DISPLAY, CLOSE, under EPS Activation, step 2.

Okay. Turning over to page 2, we'd like you to complete step 5 and step 6 with the following changes. POWER/TEMP MONITOR, AC BUS, INVERTER 2, then INVERTER 1. Fourth line CB(11), EPS: INVERTER 2, OPEN. Over.

Okay, on step number—or page 2, we should do step 5 and modify step 6 second line to read INVERTER 2, then INVERTER 1, to the last line of step 6 CB(11), EPS INVERTER 2, OPEN.

Okay. That will be on CB(16), Fred-o, but it's INVERTER 2 OPEN. Okay, on the Mission Timer Activation. Do step 1, correction, lines 1 and 2. Omit “set mission timer on CSM mark” and insert a VERB 16, NOUN 65, set mission timer. Over.

Okay. We'll do the Mission Timer Activation except we'll set it on VERB 16, NOUN 65.

Okay. Proceeding on to step, correction, page 3, CWEA checkout. Step 1, perform step 1. Warning lights will be ASCENT PRESS, CES AC, and CES DC. Under the caution lights, we may have a heater light. And that's all. Okay, perform—under the circuit breaker 16 —

I can't understand you. I'll switch OMNIs.

Say again. Over.

I'm going to switch to OMNIs here, Charlie, you're starting to fade out.

Understand. Switching OMNIs. Over.

Okay. How do you read? …, how do you read me now?

Okay, you're a little better. How me? Over.

Okay, Houston. Coming in loud and clear. I got your caution/warning checkout, step 1, do; the warning lights we'll have will be ASCENT PRESS, CES AC, CES DC. The only caution lights we may have will be a heater light and go ahead and proceed from there.

Okay, good. The component light, we won't have the H₂O SEP. Okay, on CB(16) right under that, “HEATER DISPLAY, CLOSE,” you can scratch that out. Perform all of step 2 and perform step 4 with the following changes. On panel 11, under AC BUS B, are you ready to copy? Over.

Go ahead.

Okay, under AC BUS B: S-BAND ANTENNA, OPEN; ORDEAL, OPEN. Under AC BUS A: TAPE RECORDER, OPEN. Row 2 under RCS SYSTEM A: MAIN SOV. Starting with a QUAD TCA; all four CLOSED. Under FLIGHT DISPLAYS: CROSS—COMMANDER CROSS-POINTER, OPEN; COAS, OPEN; ORDEAL, OPEN. For row 3 under HEATERS: RENDEZVOUS RADAR STANDBY, OPEN; LANDING RADAR, OPEN. Under STAB/CONTROL: ATTITUDE DIRECT CONTROL, CLOSE. Under ED: LOGIC POWER A, OPEN; and under LIGHTING: UTILITY, OPEN. Are you with me? Over.

Yes. I'm still with you, Charlie; go ahead.

Okay, Fred-o, good show. On row 4, starting with ECS: SUIT FAN 1, CLOSE; GLYCOL PUMP AUTO TRANSFER, CLOSE. Under COMM: VHF B TRANSMITTER, OPEN; VHF A RECEIVER, OPEN. Under PGNS: SIGNAL STRENGTH DISPLAY, OPEN; IMU OPERATE, CLOSE. Under EPS, row 5: CROSS TIE BUS, OPEN; and INVERTER 1, CLOSE. Over.

Okay, stand by just 1.

Okay, panel 11 configuration, top row: AC BUS B, I want the S-BAND ANTENNA, OPEN, ORDEAL, OPEN; AC BUS A, TAPE RECORDER, OPEN. Second row, under RCS SYSTEM A, I want MAIN SOV through QUAD 1 TCA, all CLOSED. COMMANDER'S X-POINTER under FLIGHT DISPLAYS, OPEN; COAS, OPEN; ORDEAL, OPEN. Third row: RENDEZVOUS RADAR STANDBY HEATER, OPEN; LANDING RADAR HEATER, OPEN. Under STAB/CONTROL: ATTITUDE DIRECT breaker, CLOSED; ED: LOGIC POWER A, OPEN; LIGHTING: UTILITY, OPEN. Under ECS: SUIT FAN 1, CLOSED; AUTO TRANSFER, CLOSED. Under COMM: VHF B TRANSMITTER, OPEN; VHF A RECEIVER, OPEN. Under PGNS: SIGNAL STRENGTH DISPLAY, OPEN; IMU OPERATE, CLOSED. Bottom row, EPS: CROSS TIE BUS, OPEN; INVERTER 1, CLOSED.

Roger, Fred. Good readback. Starting with panel 16. Under FLIGHT DISPLAYS, row 1: SE CROSS-POINTERS, OPEN; RCS SYSTEM Bravo—QUAD 1 TCA's, CLOSE; QUAD 2, CLOSE; QUAD 3, CLOSE; QUAD 4, CLOSE. Second row, under LIGHTING: FLOOD is your choice. You can either use them or not. Under ED: LOGIC POWER Bravo, OPEN; ECS: SUIT FLOW CONTROL, OPEN. Third row, under COMM: DISPLAY, OPEN; VHF A TRANSMITTER, OPEN; VHF B RECEIVER, OPEN; S-BAND ANTENNA, OPEN. Fourth row, under HEATERS: DISPLAY, OPEN; under EPS: INVERTER 2, OPEN. And that's it. Readback. Over.

Okay, panel 16, top row, FLIGHT DISPLAYS: SYSTEM ENGINEER CROSS-POINTER, OPEN; RCS SYSTEM B: QUADs 1 through 4 TCAs, all CLOSED. Second row, LIGHTING: FLOODS we'll probably have open—our choice. ED: LOGIC POWER B, OPEN; ECS: SUIT FLOW CONTROL, OPEN. Under COMM: DISPLAY, OPEN; VHF A TRANSMITTER, OPEN; VHF B RECEIVER, OPEN; S-BAND ANTENNA, OPEN. Bottom row, HEATERS: DISPLAY, OPEN. Under EPS: INVERTER 2, OPEN.

Roger. Good readback. Okay, continuing on. Nothing on page 6; nothing on page 7. Nothing on page 8 or 9. Nothing on page 10 or 11. On page 12, we want the—to perform —

Hold it. Hold on just a minute, Charlie.

Okay.

Okay. Go ahead, page 12. I'm there.

Okay Fred-o. On page 12, we want the MSFN updates. We've got some vectors for you and a P30 pad. And we'll—when you get to that state, we'll let you know when we want to uplink. Okay. Under “AGS Activation and Self Test,” perform the entire procedure. On page 13, under “AGS Aline,” do step 1; under “DAP Set, Gimbal/Throttle Test,” do step 1 with the following change. Under “THROTTLE CONTROL,” we want it “AUTO.” Over.

Okay. I'll catch up here. On page 12, you'll give us MSFN updates, some vectors, and a P30; and we're to do the entire “AGS Activation and Self Test.” On page 13, we'll do the “AGS Align” and under “DAP Set, Gimbal/Throttle Test,” step 1, I've changed “THROTTLE CONTROL MANUAL” to “THROTTLE CONTROL AUTO.”

Good readback. Turning over to page 14, step 2, we want you to change the DAP NOUN 46 to 31021. Then after the NOUN 47, insert “VERB 34, ENTER.” Over.

Okay. On page 14, a VERB 48, DAP load, NOUN 46 changed to 31021. I assume you will give us any updated weights if we need any, and after the NOUN 47, a “VERB 34, ENTER.” So, I—you're saying our gimbals look all right.

That's affirmative on the gimbals, Fred. Nothing else on page 14. Proceed to page 15, and under “RCS CHECKOUT,” we'd like to scratch that wording and just say “Verify the following switches: GUIDANCE CONTROL, PGNS;” step 3—correction—it's line 3, change “ATTITUDE CONTROL (3)” to “MODE CONTROL;” “MODE CONTROL (BOTH)” to “AUTO.” Verify ACA PROP, LMP ENABLE; ACA/4 JET, LMP ENABLE; TTCA/TRANSLATION, LMP, ENABLE. That is all on page 15. Over.

Okay. Hand me the eyepiece. I got Scorpio.

You have?

Yes. And Antares.

Where's the other one? I'll put it back in here.

Hello, Aquarius. Houston. On activation page 16, if you are ready. Over.

Okay. Stand by just 1, Charlie. Jim's going to fish around and see if he's got—he thinks he's got Scorpio. I'm the AOT now. Okay, Charlie, go ahead. I'm on 16 now.

Okay. Fred. On page 16, perform the “Docked DPS BURN (PGNS),” that entire sequence down—down through the end of the page, except cross out that “CSM Maneuver to Burn Attitude, then CMC—FREE.” Over.

Yes. I kind of deduced that one, Charlie. Page 16, “Docked DPS BURN (PGNS),” except we'll forget the CSM maneuver.

Okay. And you can forget the “APS Follow-up,” too. Okay, on page 17, perform all of the AGS entries and at 4 minutes, we got a change. First line, CB(16) INVERTER 3, CLOSE; line 2, scratch out “Select INVERTER 1.” At—proceeding on down the page, after “ATTITUDE MONITOR,” we'd like you to place the RATE SCALE to “25 degrees a second.” Okay, proceeding on down four more lines to “BALANCE COUPLE,” we'd like to turn “BALANCE COUPLE-OFF.” That's to keep the upfiring jets off of the CSM, in case we have to damp any rates in AGS, though we don't think we will. Then perform the rest of that page as written. Over.

Okay, on page 17. Do the AGS load at minus 4 minutes; it's CB(11), INVERTER 2, CLOSE, and scratch “Select INVERTER 1.” RATE SCALE changed to “25 degrees a second.” “BALANCE COUPLE,” we'll turn “OFF;” and, incidentally, on the AGS dampen rates point, it brings up the discussion we'd had before, Charlie, on takeovers. You might discuss what it's going to cost us DELTA-V-wise, if we get a control problem, to just shut her off and it take 30 minutes to regroup for a good manual burn.

Fred, we already got that story for you, pretty well in hand. We're reviewing it right now. And I'd like to defer that question until later on. Basically, we're just going to shut down and take what we got, and we got a midcourse of about—the maximum of 5 foot per second, anywhere in the burn to get back to free return. That—that's basically the story. We'll give you the mission rules for this burn momentarily. I'd like to proceed on to page 18, at minus 1 minute, scratch “MASTER ARM—ON.” Stand by.

Okay, on page 18, and I've already done that at 1 minute; “MASTER ARM—ON,” I'll scratch —

— Slipped that … and I won't have anything to do —

— I've already scratched “CB(16) ABORT STAGE—CLOSE” for the previous burn.

Okay. We want you to close the CB(16) ABORT STAGE. Over.

Okay. You got some special reason for that?

Yes, sir. We like—In case we don't get a manual ON—I mean, an AUTO ON, we're going to back up using the abort stage in the descent-engine command override at ignition plus 1 second. Backing up to page 17, at minus 4 minutes, you read “CB(11) INVERTER 2,” it should be “CB(16) INVERTER 2.” Over.

Okay, I got you, Charlie. 17, “CB(16) INVERTER 2, CLOSE.”

Okay, back to page 18. We'll continue on as is at 30 seconds, 10 seconds, 7 seconds, minus 5 seconds. At “ignition,” no ignition and we'll add here, “no ignition, START pushbutton—push; still no ignition, DESCENT ENGINE COMMAND OVERRIDE, ON.” Over.

I got it out there, but I can't get to see it closer.

Okay, on channel—on page 18, right on down the line, everything holds until after “ignition”; “if no ignition, START pushbutton—push; still no ignition, DESCENT ENGINE COMMAND OVERRIDE switch ON.”

Okay, good readback, Fred-o. At plus 15 seconds, scratch “MASTER ARM—OFF;” and at—proceeding on down to “At Engine Cutoff,” it's—after the “MODE CONTROL: PGNS to ATT HOLD,” we'd like a “VERB 76,” and the “Damp Excessive Rates Via the LM Y, Z Translation.” Over.

Okay, scratch “MASTER ARM—OFF” at plus 15, and “At Engine Cutoff” after “MODE CONTROL: PGNS—ATT HOLD,” we want a “VERB 76 ENTER,” and “Damp Excessive rates Via LM Y, Z translation.” And a question on the—propellant quantity, we expect it to get down below 37 percent on this burn. Does that compare with that burn time when you get down to it.

That's negative. At this—this burn, we're looking at—not reaching 37 percent, so I don't think we'll have to perform that step. We will verify that for you. Okay. One other statement: “At Engine Cutoff, if manual start, then at 30 feet per second to go, throttle to 40 percent. At DELTA-V equals zero, stop pushbutton, push.” Over.

Okay, Charlie. If a manual start, that was throttle to 40 percent at—Was that 30 foot per second to go?

That's affirmative. At 30 foot per second to go.

Okay. Then it's stop pushbutton at VGO equals zero?

That's affirmative. What we want to do, if we got a manual start, we're going to have to shut down manually, and, to get a better guided cut-off at 30 foot per second to go, we want you to throttle at 40 and acceleration is within reason there, and we feel like we can get a good manual cut-off. Over.

Okay.

Okay. Now, Fred, that was good in the checklist. That's all. We'll have the powerdown checklist for you momentarily, and we'd like to ask you if you plan to use the DPS burn card. If you do, we have some changes to that. Over.

Okay. Let me get ahold of this … right now.

Let me know when you are ready to copy. Over.

I'm ready.

Okay. The first two lines are okay. CB—third line, CB(11) and (16): STAB/CONTROL, all CLOSED except CB(11) AEA, OPEN; ABORT STAGE, OPEN; AELD, OPEN. CB(16) AELD, OPEN. Over.

Okay, on the DPS burn card, third line should read CB(11) and (16): STAB/CONTROL CBs all CLOSED, except CB(11) AEA, OPEN; ABORT STAGE, OPEN; AELD, OPEN; CB (16) AELD, OPEN.

Okay. Good readback. Proceeding on down the page. “BALANCE COUPLE” switch, “BALANCE COUPLE OFF.” Okay, down to the TTCA—it's the last line before minus 2 minutes—“TTCA COMMANDER THROTTLE, MINIMUM; LMP TTCA to JETS.” At minus 2 minutes, scratch “400 plus 1.” At minus 1 minute, scratch “MASTER ARM, ON.” At minus 10 seconds, add “MANUAL ULLAGE.” At plus 5 seconds, scratch “DESCENT ENGINE COMMAND OVERRIDE, ON;” add “TTCA, 40 percent.” Okay, the same comments apply about the manual start: “At the ignition time, if no start, manual START pushbutton, push; if still no start, DESCENT ENGINE COMMAND OVERRIDE, ON.” And the same comments apply to shutting down at manual start. Over.

Okay. The same comments. I'll start at the top again here. Okay. “BALANCE COUPLE” should be changed to “OFF.” Under TTCA, it should be “LMP TTCA” to “JET.” Scratch “400 plus 1” at minus 2; scratch “MASTER ARM, ON” at minus 1. Add at minus 10 seconds “MANUAL ULLAGE”; add ignition—can add the comment about “If no start, START pushbutton, push; still no start, DESCENT ENGINE COMMAND OVERRIDE, ON.” At the plus 5-second point, scratch “DESCENT ENGINE COMMAND OVERRIDE, ON,” and add “TTCA to 40 percent,” and the same comment applies at engine stop to perform.

We really don't use this card at that time.

Roger, Fred-o. Now we aren't—also at minus 30 seconds, we aren't looking at an AGS burn so you can scratch “ABORT pushbutton, push,” and at DELTA-V equal to zero, scratch “ABORT pushbutton, reset.” Over.

Okay. Minus 30 for AGS burn, “ABORT pushbutton, push” is scratched, and at DELTA-V equals zero, “ABORT pushbutton, reset” is scratched.

Okay, you got it, babe. We'll have some mission rules for you momentarily, and the powerdown checklist and also a PTC setup. Over.

Okay.

Houston, Aquarius.

Go ahead, Jim. Over.

Roger. Be advised I'm now seeing Antares and Nunki in the AOT, and I just wanted to know whether you want me to try to do a P52.

Roger. Stand by. We copy the stars you are seeing. Stand by on a P52.

Not very far apart. Put the card back up, Jim —

It's better than Antares and Shaula.

Yes. Sure is. That's right.