# STS-92

STS-92 was a Space Shuttle mission to the International Space Station (ISS) flown by Space Shuttle Discovery. STS-92 marked the 100th mission of the Space Shuttle and Discovery's 28th flight. It was launched from Kennedy Space Center, Florida, 11 October 2000.

## Crew

| Position | Astronaut | Astronaut |
| Commander | Brian Duffy Fourth and last spaceflight | Brian Duffy Fourth and last spaceflight |
| Pilot | Pamela A. Melroy First spaceflight | Pamela A. Melroy First spaceflight |
| Mission Specialist 1 | Leroy Chiao Third spaceflight | Leroy Chiao Third spaceflight |
| Mission Specialist 2 Flight Engineer | William S. McArthur Third spaceflight | William S. McArthur Third spaceflight |
| Mission Specialist 3 | Peter J.K. Wisoff Fourth and last spaceflight | Peter J.K. Wisoff Fourth and last spaceflight |
| Mission Specialist 4 | / Michael E. López-Alegría Second spaceflight | / Michael E. López-Alegría Second spaceflight |
| Mission Specialist 5 | Koichi Wakata, JAXA Second spaceflight | Koichi Wakata, JAXA Second spaceflight |

### Spacewalks
#### EVA 1

* Personnel: Chiao and McArthur
* Start: 15 October 2000 – 14:27 UTC
* End: 15 October 2000 – 20:55 UTC
* Duration: 6 hours, 28 minutes

#### EVA 2

* Personnel: López-Alegría and Wisoff
* Start: 16 October 2000 – 14:15 UTC
* End: 16 October 2000 – 21:22 UTC
* Duration: 7 hours, 7 minutes

#### EVA 3

* Personnel: Chiao and McArthur
* Start: 17 October 2000 – 14:30 UTC
* EVA 3 End: 17 October 2000 – 21:18 UTC
* Duration: 6 hours, 48 minutes

#### EVA 4

* Personnel: López-Alegría and Wisoff
* Start: 18 October 2000 – 15:00 UTC
* End: 18 October 2000 – 21:56 UTC
* Duration: 6 hours, 56 minutes

### Crew seat assignments

| Seat | Launch | Landing | Seats 1–4 are on the flight deck. Seats 5–7 are on the mid-deck. |
| 1 | Duffy | Duffy | | Seats 1–4 are on the flight deck. Seats 5–7 are on the mid-deck. |
| 2 | Melroy | Melroy | | Seats 1–4 are on the flight deck. Seats 5–7 are on the mid-deck. |
| 3 | Wakata | Lopez-Alegria | Seats 1–4 are on the flight deck. Seats 5–7 are on the mid-deck. |
| 4 | McArthur | McArthur | | Seats 1–4 are on the flight deck. Seats 5–7 are on the mid-deck. |
| 5 | Wisoff | Wisoff | | Seats 1–4 are on the flight deck. Seats 5–7 are on the mid-deck. |
| 6 | Lopez-Alegria | Wakata | Seats 1–4 are on the flight deck. Seats 5–7 are on the mid-deck. |
| 7 | Chiao | Chiao | | Seats 1–4 are on the flight deck. Seats 5–7 are on the mid-deck. |

## Mission highlights

| Attempt | Planned | Result | Turnaround | Reason | Decision point | Weather go (%) | Notes |
| 1 | 5 Oct 2000, 9:38:26 pm | Scrubbed | — | Technical | 5 Oct 2000, 8:55 pm | 60 | Problems with ET separation bolts and a main propulsion system valve on Discovery. |
| 2 | 9 Oct 2000, 8:05:17 pm | Scrubbed | 3 days 22 hours 27 minutes | Technical | 9 Oct 2000, 9:00 am | 30 | High winds prevented pre-launch preparations. |
| 3 | 10 Oct 2000, 7:39:36 pm | Scrubbed | 0 days 23 hours 34 minutes | Technical | 10 Oct 2000, 6:30 pm ​(T−00:20:00 hold) | 70 | A metal pin was found wedged in between the orbiter and external tank in an area that technicians could not access. There was a risk that the pin could dislodge during launch and damage the shuttle. |
| 4 | 11 Oct 2000, 6:17:00 pm | Success | 0 days 22 hours 37 minutes | | | 80 | |
STS-92 was an ISS assembly flight that brought the Z1 truss, Control Moment Gyros, Pressurized Mating Adapter-3 (PMA-3) (mounted on a Spacelab pallet) and two DDCU (Heat pipes) to the space station. The Z1 truss was the first exterior framework installed on the ISS and allowed the first U.S. solar arrays to be temporarily installed on Unity for early power during flight 4A. The Ku-band communication system supported early science capabilities and U.S. television on flight 6A. The CMGs (Control Moment Gyros) weigh about 27 kilograms (60 lb) and provide non-propulsive (electrically powered) attitude control when activated on flight 5A, and PMA-3 provides shuttle docking port for solar array installation on flight 4A and Destiny Lab installation on flight 5A.
The mission included seven days of docked operations with the space station, four EVAs, and two ingress opportunities.
Over the course of four scheduled spacewalks, two teams of space walkers and an experienced robot arm operator collaborated to install the Z1 (Z for zenith port) truss structure on top of the U.S. Unity connecting node on the growing station and to deliver the third Pressurized Mating Adapter (PMA 3) to the ISS for the future berthing of new station components and to accommodate shuttle dockings.
The Z1 truss was the first permanent lattice-work structure for the ISS, very much like a girder, setting the stage for the future addition of the station's major trusses or backbones. The Z1 fixture also served as the platform on which the huge U.S. solar arrays were mounted on the next shuttle assembly flight, STS-97. The Z1 truss included many elements of the Communications and Tracking subsystem. The hardware included a Transmitter/Receiver/Controller (SGTRC) built by L3 Communications Systems-East in Camden, NJ. John Schina was the Chief Engineer of the ISS Program at L3.
The Z1 contains four large gyroscopic devices, called Control Moment Gyroscope (CMGs), which are used to maneuver the space station into the proper orientation on orbit once they were activated following the installation of the U.S. laboratory.
During the fourth spacewalk, astronauts Wisoff and López-Alegría tested the SAFER jet backpack, flying up to 50 feet while remaining tethered to the spacecraft.