Flight 401 departed JFK Airport in New York on Friday, December 29, 1972, at 21:20 EST, with 163 passengers and 13 crew members on board. The flight was routine until 23:32, when the plane began its approach into Miami International Airport. After lowering the gear, First Officer Stockstill noticed that the landing gear indicator, a green light identifying that the nose gear is properly locked in the "down" position, had not illuminated. This was later discovered to be due to a burned-out light bulb. The landing gear could have been manually lowered, nonetheless. The pilots cycled the landing gear, but still failed to get the confirmation light. Loft, who was working the radio during this leg of the flight, told the tower that they would discontinue their approach to their airport and requested to enter a holding pattern. The approach controller cleared the flight to climb to 2,000 ft (610 m), and then hold west over the Everglades. The cockpit crew removed the light assembly, and Second Officer Repo was dispatched to the avionics bay beneath the flight deck to confirm via a small porthole if the landing gear was indeed down. Fifty seconds after reaching their assigned altitude, Captain Loft instructed First Officer Stockstill to put the L-1011 on autopilot. For the next 80 seconds, the plane maintained level flight. Then, it dropped 100 ft (30 m), and then again flew level for two more minutes, after which it began a descent so gradual it could not be perceived by the crew. In the next 70 seconds, the plane lost only 250 ft (76 m), but this was enough to trigger the altitude warning C-chord chime located under the engineer's workstation. The engineer (Repo) had gone below, and no indication was heard of the pilots' voices recorded on the CVR that they heard the chime. In another 50 seconds, the plane was at half its assigned altitude. As Stockstill started another turn, onto 180°, he noticed the discrepancy. The following conversation was recovered from the flight voice recorder later:Stockstill: We did something to the altitude.Loft: What?Stockstill: We're still at 2,000 feet, right?Loft: Hey—what's happening here? Less than 10 seconds after this exchange, the jetliner crashed:Cockpit area microphone (CAM): [Sound of click]CAM: [Sound of six beeps similar to radio altimeter increasing in rate]CAM: [Sound of initial impact] The location was west-northwest of Miami, 18.7 mi (30.1 km) from the end of runway 9L. The plane was traveling at 227 miles per hour (197 kn; 365 km/h) when it hit the ground. With the aircraft in mid-turn, the left wingtip hit the surface first, then the left engine and the left landing gear, making three trails through the sawgrass, each 5 ft (1.5 m) wide and over 100 ft (30 m) long. When the main part of the fuselage hit the ground, it continued to move through the grass and water, breaking up as it went. The TriStar's port outer wing structure struck the ground first, followed by the No. 1 engine and the port main undercarriage. The disintegration of the aircraft that followed scattered wreckage over an area 1,600 ft (500 m) long and 330 ft (100 m) wide in a southwesterly direction. Only small fragments of metal marked the wingtip's first contact, followed 49 ft (15 m) further on by three massive 115 ft (35 m) swaths cut through the mud and sawgrass by the aircraft's extended undercarriage before two of the legs were sheared off. Then came scattered parts from the No. 1 (port) engine, and fragments from the port wing itself and the port tailplane. About 490 feet (150 m) from the wingtip's initial contact with the ground, the massive fuselage had begun to break up, scattering components from the underfloor galley, the cargo compartments, and the cabin interior. At 820 ft (250 m) along the wreckage trail, the outer section of the starboard wing tore off, gouging a 59-foot-long (18 m) crater in the soft ground as it did so. From this point on, the breakup of the fuselage became more extensive, scattering