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MY FS FLIGHTS
Flight Score
Departure
Raise the gear lever promptly once a positive climb is confirmed, before reaching the target retraction height.
What happened: Gear retraction was delayed, with the gear not coming up until 6,981 ft agl.
Watch for: Landing gear: up by the normal retraction gate
Arrival
Add power on short final to hold speed at 153 kt, correcting the slow threshold speed before it carries through to the flare.
What happened: Threshold speed was slow at 127 kt against 153 kt, and touchdown followed short of the aim point at 786 m. Crossing the threshold slow like this usually carries the touchdown short.
Watch for: Airspeed indicator against 153 kt on short final.
Every knot above Vref is stored kinetic energy, and energy stored at the threshold must be dissipated in ground effect before the aeroplane will stop flying. Because kinetic energy scales with the square of speed, the excess you must dissipate grows fast. At a 45-knot approach, five knots hot is over a tenth more speed and roughly a quarter more energy to get rid of in ground effect. This is why the fix is never in the flare. It was decided three miles earlier, on final, at the airspeed indicator.
Read more in VRef ExplainedStart to finish · 19 stages, 17 scored
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The threshold, the flare and the hold-off. The approach that led to it is the stabilisation gates below.
Two stabilised approach gates, each with seven checks, where the approach path is 1,000 ft and 500 ft above the runway. They are the approach's score: the checks passed out of the checks that ran.
Side view — the last 1,524 m of the approach.
Plan view — the first 1,524 m of the 3,798 m runway, to the same scale as the side view.
Touched down 786 m short of the threshold. The 2.99 G arrival is the firm side of smooth.
The rest of the report
The Boeing 747-8 taxied to runway 01 at SKRG Jose Maria Córdova International Airport and commenced the departure roll. The aircraft used a takeoff distance of 2,245 m, representing 64 % of the runway, and lifted off at 166 kt. Ambient conditions were 23 °C with a wind of 2 kt from 045°, including a 1 kt cross-wind and a 1 kt head-wind component.
Climb began 2 nm north of SKRG, with the airplane accelerating from 8,036 ft asl to 25,088 ft asl, an altitude gain of 17,052 ft achieved in 9 minutes while covering 44 nm.
The first cruise segment started 5 nm south-east of Caparrapi and lasted 5 minutes, during which the aircraft progressed 26 nm at level flight.
Descent commenced 5 nm north of Argelia, descending from 25,650 ft asl to 12,014 ft asl, a loss of 13,636 ft over 7 minutes and a distance of 52 nm.
A second cruise phase originated 3 nm south of El Rosal, persisting for 3 minutes and covering 15 nm.
The next descent started 3 nm north of Facatativa, dropping from 11,978 ft asl to 10,324 ft asl, a decrease of 1,654 ft in 2 minutes across 7 nm.
A further level cruise began 3 nm south-east of El Rosal and lasted 3 minutes, adding 15 nm to the flight path.
The subsequent descent was initiated 3 nm east of Facatativa, reducing altitude from 10,221 ft asl to 9,516 ft asl, a loss of 705 ft in 2 minutes while traveling 6 nm.
Final approach to runway 14R at SKBO El Dorado International Airport was flown from the north-west on a heading of 131.0° at 4 nm and 1,137 ft agl.
A go-around was executed on runway 14R at an altitude of 25 ft agl, indicating the aircraft aborted the initial landing attempt.
A second go-around followed on the same runway at 16 ft agl before a later successful approach and landing.
Touchdown occurred before the threshold of runway 14R at a speed of 128 kt, with a vertical speed of minus 1,310 fpm. The touchdown point was misaligned by 202.0 m from the centreline. Local weather at the time was 16 °C with a wind of 11 kt from 179°, including an 8 kt cross-wind and a 6 kt head-wind component. The total landing distance recorded was 1,316 m, representing 35 % of the runway, and rollout alignment was off by 196.8 m from the centreline.
The aircraft taxied from the runway to parking in 4 minutes, covering less than 1 nm.
In total, the flight covered 159 nm, required 35 minutes, and consumed 5,923 kg of fuel.
The Boeing 747-8 established the final approach to runway 14R at SKBO El Dorado International Airport from the north-west on a heading of 131.0° at 4 nm and 1,137 ft agl. Ambient temperature was 16 °C with wind from 179° at 11 kt, giving an 8-kt crosswind component and a 6-kt headwind component.
During the threshold and flare segment the aircraft touched down before the runway threshold. Touchdown speed was 128 kt and was judged good, while the vertical touchdown rate was very heavy at minus 1,310 fpm.
The touchdown point was excessively misaligned, being 199.6 m off the centreline, and the total landing distance measured 1,316 m, representing 35 % of the available runway.
Rollout alignment remained excessively misaligned, with the aircraft deviating 194.5 m from the centreline during the rollout phase.
Focus on maintaining centreline alignment throughout the approach and flare to reduce lateral deviation, and refine flare technique to achieve a lighter vertical speed at touchdown. These adjustments will help convert the moderate 66.0 % score into a higher performance level.
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