United Airlines flight 1449, an Airbus A320, experienced a tailstrike on landing. Substantial damage occurred to the underbelly and aft bulkhead area. There were no injuries among the crew or passengers. According to the pilots, the approach was stabilized, on speed and on glide path, until the aircraft descended below 100 feet above the ground (AGL). Then, the airspeed began to slow below the approach speed of 141 knots, and the aircraft pitch attitude increased. At about 100 feet above the field elevation, the first officer pulled the thrust levers to idle. Shortly thereafter, the airspeed decreased to about 10 knots below approach speed. The first officer stated that he felt a “sense of ground rush” during the flare at about 70 feet and he increased back pressure on the side-stick to arrest the sink rate. The airplane touched down with a nose up pitch attitude of 12.3 degrees with the main landing gear compressed. The tail strike pitch limit at touchdown with the main landing gear compressed is 11.9 degrees nose up.
The failure of the flightcrew to arrest an excessive sink rate during the flare for landing.
— 12,000 samples, 30 parameters, SRN 191,330 to SRN 191,530.
| Parameter | Max | at | Min | at | Final | at |
|---|---|---|---|---|---|---|
| Pressure altitude ft | 3,080.0 | SRN 191,331 | 1,036.0 | SRN 191,504 | 1,100.0 | SRN 191,530 |
| Pitch attitude deg | 12.3 | SRN 191,494 | -0.4 | SRN 191,520 | 0.4 | SRN 191,530 |
| Roll attitude deg | 4.2 | SRN 191,426 | -21.4 | SRN 191,338 | -0.7 | SRN 191,530 |
| Vertical acceleration g | 1.5 | SRN 191,494 | 0.7 | SRN 191,496 | 1.0 | SRN 191,530 |
| Time | Event | Page |
|---|---|---|
| about 3 minutes before touchdown | Start of plots; after completing a left turn the aircraft straightened on the runway heading with flaps and slats deployed | 3 |
| touchdown | Both main gear touched down at the same moment, accompanied by two vertical acceleration spikes about two seconds apart (tail strike) | 3 |
| about 15 seconds after main gear touchdown | Nose gear touched down | 3 |
| landing | The copilot's sidestick was being operated at the time of the incident; the pilot's was not | 3 |
Docket: data.ntsb.gov/Docket/?NTSBNumber=DCA09FA004. This brief is an analytical aid assembled from public records; it is not an investigative finding.