MV Elsie MacGill was an Eridani Systems, Inc. heavy freighter of the Sheila McGuffie class. Launched in 4127, it was purchased and operated by Frangmire Astral Refineries until its loss in an accident in 4154.

The ship was identical to the other ships in its class, measuring (not counting antennae) 415 metres in length, 155 metres in width, and 120 metres in height. Main propulsion was provided by four ESI vectored fusion drives, with an additional four dedicated vertical lift engines. Although notionally operable a single person, or even in an entirely automated mode, the ship was authorised to fly with a minimum crew of 10.

In April 4154, MV Elsie MacGill was in transit from a Frangmire refinery in the Caleb's Crossing system to a customer facility on Prandari, in the Wherrick system. The ship was loaded entirely with containers of processed beryllium. The captain at the time was Joachim Kubira.

Like all modern starships, the ship was equipped with two primary defenses against incidental collisions with spaceborne matter: an array of automated lasers, and a layer of protective plating across the ship's bow surfaces, which also provides protection against atmospheric heating and abrasion during re-entry. The anticollision lasers destroy or break up any hazards large enough to be detected by radar and lidar; the transit plating absorbs smaller particles. Because these two systems are critical to the safety of the ship in flight, there are strict regulatory requirements for their maintenance and protection. The incident leading to the loss of MV Elsie MacGill was the result of substantial failures to observe those requirements.

While landed for loading at the Frangmire cargo port in Caleb's Crossing, the ship had had to weather a planetary sandstorm. In order to protect the anticollision lasers from damage and buildups of sand, they should have been fitted with polyfabric coverings, but the ship's crew failed to do this.

On the 15th of April, the ship departed Caleb's Crossing. On the 17th, it made a scheduled stop at an automated waystation in Karantova to take on supplies. While departing the waystation in realspace, the ship encountered a 39cm piece of metallic stellar detritus travelling at a relative velocity of approximately 2500m/s. The anticollision system targeted the object with the B2 anticollision laser (mounted on the starboard side of the bow), but the turret traverse mechanism jammed due to sand ingress, and the laser failed to fire. The ACS immediately attempted to re-engage with the B1 laser (on the port side). The B1 laser successfully acquired the object and began to fire, but sand abrasion had caused serious damage to the exterior of the firing aperture, and the laser almost immediately shut down to avoid inflicting reflection damage to its internal components. At this point, the collision alarm sounded, and the ACS automatically began rotating the ship to try to bring the B3 laser (mounted centrally at the bottom of the bow) to bear on the object. Unfortunately, the B3 laser had suffered similar damage to the B1 laser, and also shut down immediately upon beginning to fire.

With no remaining lasers with adequate fields of fire, the ACS oriented the ship to ensure the object - partially melted by the brief firing of the B1 and B3 lasers, but still largely coherent - would strike the most protected part of the ship: the bow transit plating. Accordingly, the object impacted the starboard side of the bow at a shallow angle. In its molten state, a significant part of the object's mass and energy was dispersed by the transit plating, but a penetration was inevitable. The impact blew a crater in the plating 2.5m across, culminating in a 12cm hole into the interior of the ship. Remnants of the object caused damage to several compartments behind the breach, and the shock of the impact caused cracks in various plates and structural members surrounding the point of contact.

Despite the apparent severity of the strike, the compartments behind the transit plating mainly contained either empty crumple zones, or cooling systems for the plating. As a result, there was no immediate danger to the ship or the crew. Only one pressurised compartment suffered a minor breach, and emergency doors successfully contained the leak.

After figuring out what had just happened, Captain Kubira chose to abort the flight and return to the waystation, since its own anticollision systems could protect the ship while docked. There, the crew made emergency repairs to the ship's lasers, this time verifying that they were operational, and patched the hole in the bow using High Density Expansion Tape.

After making these repairs, the crew departed the waystation once more on the evening of the 19th of April. Departure was uneventful and the ship successfully entered jump space. The ship arrived in the Wherrick system on the 22nd.

Although it was acceptable to continue the flight with the ship repaired as described, it required higher vigilance and several alterations to the flight parameters. Most notably, any damage to the transit plating meant that the ship needed to enter Prandari's atmosphere at a significantly reduced relative speed. In its weakened state, the plating could not be relied upon to resist normal levels of atmospheric heating - and the HDET sealing the hole was even less resilient. However, while they had been trained for this type of damage, the crew made no changes to the atmospheric insertion plan.

At 2317 on the 22nd, MV Elsie MacGill contacted Prandari traffic control and entered the atmospheric approach pattern. The first officer did not report the damage to the ship to traffic control, but Captain Kubira did report it to the port controller when confirming their landing plans, intending to have a repair crew fix the plating after landing.

Descending into the upper atmosphere at normal speeds, there was initially no sign of trouble, but as the air density thickened, the problems began to show themselves. The damaged transit plating began to heat much more rapidly than expected, triggering an alarm. Soon afterwards, the HDET covering the breach failed, allowing high-speed air to directly enter the ship. Ship systems recorded an increase in vibrations and ambient noise on the bridge, but the crew apparently didn't notice over the temperature alarm.

The first officer investigated the alarm, noted the temperature rise, and verified that the internal cooling systems were increasing their activity to compensate. Seemingly satisfied that this would solve the issue, the first officer reset the alarm and reported this to the captain. However, 20 seconds later, the alarm sounded again, as the heating began to exceed the system's ability to compensate. As the crew responded to this, additional alarms started to chime in. The jet of high-speed air from the breach was causing severe damage to internal compartments, triggering both fire and depressurisation alarms. Acting like a pressure cutter, the air jet gradually penetrated further and further aft into the ship. Simultaneously, the weakened transit plating around the breach began to buckle, widening the breach as it collapsed inwards. Automated systems responded to the fire alarms, but since the “fire” was actually friction superheating, the fire-suppressant foam had little effect, and was simply blown aftwards along with everything else.

On the bridge, the crew finally began to notice the increasing vibrations. Captain Kubira ordered a level-off at the current altitude, voicing his concern that the higher air density at lower altitude would worsen the problem. The first officer contacted traffic control, requesting and receiving the appropriate clearance, but did not declare an emergency. Unfortunately, the air density was already sufficient to overwhelm the ship's protection. The only solutions would have been to reduce the air density, ideally with an immediate return to orbit, or to conduct a harsh braking maneuver and reduce the relative air speed.

Maintaining altitude and speed, the ship flew a wide circle, attempting to remain roughly near the approach path and hopefully resume its planned descent. But the transit plating continued to overheat, starting to burn through in areas damaged by the previous impact. To make that problem worse, the internal cooling systems were not only beginning to overstress, but were also suffering damage from the spreading effects of the breach. As their cooling capacity reduced, the plating burnthrough sped up.