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Statuts: Accident investigation report completed and information captured
Date:mardi 19 janvier 2021
Heure:02:37
Type/Sous-type:Silhouette image of generic B734 model; specific model in this crash may look slightly different
Boeing 737-4Q8 (SF)
Compagnie:West Atlantic (UK)
Immatriculation: G-JMCY
Numéro de série: 25114/2666
Année de Fabrication: 1994-10-20 (26 years 3 months)
Moteurs: 2 CFMI CFM56-3C1
Equipage:victimes: 0 / à bord: 2
Passagers:victimes: 0 / à bord: 0
Total:victimes: 0 / à bord: 2
Dégats de l'appareil: Substantiels
Conséquences: Written off (damaged beyond repair)
Lieu de l'accident:Exeter Airport (EXT) (   Royaume Uni)
Phase de vol: A l'atterrissage (LDG)
Nature:Cargo
Aéroport de départ:East Midlands Airport (EMA/EGNX), Royaume Uni
Aéroport de destination:Exeter Airport (EXT/EGTE), Royaume Uni
Numéro de vol:NPT05L
Détails:
West Atlantic UK flight NPT05L, a Boeing 737-400 cargo plane, suffered substantial damage during a hard landing at Exeter Airport, U.K.
The takeoff and climb from East Midlands Airport (EMA) proceeded without event. During the cruise the crew independently calculated the landing performance. Runway 26 at Exeter Airport (EXT) was forecast to be wet, so they planned to use Flap 40 for the landing, with Autobrake 3. With both pilots being familiar with EXT the co-pilot, who was Pilot Flying (PF), conducted a short brief of the pertinent points for the approach.
From the ATIS they noted that the weather seemed to be better than forecast and the surface wind was from 230° at 11 kt. The ATC provided the flight crew with radar vectors from ATC to the ILS on Runway 26 at EXT.
The landing gear was lowered and Flap 25 selected before the aircraft intercepted the glideslope. Flap 40 (the landing flap) was selected on the glideslope just below 2000 ft amsl. With a calculated VREF of 134 kt and a surface wind of 10 kt the PF planned to fly the approach with a VAPP of 140 kt. At about 10 nm finals, upon looking at the flight management computer, the captain, who was Pilot Monitoring (PM), noticed there was a 30 kt headwind, so a VAPP of 144 kt was selected on the Mode Control Panel (MCP). The crew became visual with the runway at about 1000 ft aal. The PF then disconnected the Auto Pilot and Auto Throttle; the Flight Directors remained on.
As the wind was now starting to decrease, the VAPP was then reduced from 142 to 140 kt at about 600 ft aal.
As the wind reduced, towards the 10 kt surface wind, the PF made small adjustments to the power to maintain the IAS at or close to VAPP. At 500 ft radio altimeter (RA) the approach was declared stable by the crew, as per their standard operating procedures. At this point the aircraft had a pitch attitude of 2.5° nose down, the IAS was 143 kt, the rate of descent (ROD) was about 860 ft/min, the engines were operating at about 68% N1 and the aircraft was 0.4 dots above the glideslope. However, the ROD was increasing and soon thereafter was in excess of 1,150 ft/min. This was reduced to about 300 ft/min but soon increased again.
At 320 ft RA, the aircraft went below the glideslope for about 8 seconds and, with a ROD of 1,700 ft/min, a 'SINK RATE' GPWS alert was enunciated. The PF acknowledged this and corrected the flightpath to bring the aircraft back to the glideslope before stabilizing slightly above the glideslope; the PM called this deviation too. As the PF was correcting back to the glideslope the PM did not feel there was a need to take control. During this period the maximum recorded deviation was 3/4 of a dot below the glideslope.
At about 150 ft RA, with a ROD of 1,300 ft/min, there was a further 'SINK RATE' GPWS alert, to which the PM said, 'watch that sink rate ', followed by another 'Sink Rate' alert, which the PF responded by saying 'and back...'
The commander recalled that as the aircraft crossed the threshold, at about 100 ft, the PF retarded the throttles, pitched the aircraft nose down, from about 5° nose up to 4° nose down, and then applied some power in the last few feet. During these final moments before the landing, there was another 'Sink Rate' alert. The result was a hard landing. A 'Pull Up' warning was also triggered by the GPWS, but it was not audible on the CVR.
The last surface wind transmitted by ATC, just before the landing, was from 230° at 10 kt. During the rollout the commander took control, selected the thrust reversers and slowed down to taxi speed. After the aircraft had vacated the runway at Taxiway Bravo it became apparent the aircraft was listing to the left. During the After Landing checks the co-pilot tried to select Flaps Up, but they would not move. There was then a Hydraulic LP caution. As there was still brake accumulator pressure the crew were content to taxi the aircraft slowly the short distance onto Stand 10. Once on stand the listing became more obvious.
It was then that the crew realised there was something 'seriously wrong' with the aircraft. After they had shut the aircraft down, the flight crew requested that the wheels were chocked, and the aircraft be connected to ground power before going outside to inspect the aircraft. Once outside a hydraulic leak was found. The fuselage skin aft of the wings was cracked and buckled, and the rear fuselage was distorted downward. The crown skin was creased and rippled along most of the fuselage. Both main landing gear shock absorbers were found to be bottomed, and the left main landing gear beam was distorted upwards such that the aircraft was approximately 2° left-wing low. he flap drive mechanism was damaged, and the left-wing inboard driveshaft was bent; the left inboard gearbox casing and its mountings were broken.
The maximum vertical acceleration recorded by the FDR on touchdown was 3.8g, at this point there was 3° of left roll.

Probable Cause:

Conclusion:
The aircraft suffered a hard landing as a result of the approach being continued after it became unstable after the aircraft had past the point where the crew had declared the approach stable and continued. Despite high rates of descent being observed beyond the stable point, together with associated alerts the crew elected to continue to land. Had the approach been discontinued and a GA flown, even at a low height, while the aircraft may have touched down the damage sustained may have been lessened.
While the OM did not specifically state that an approach was to remain stable beyond the gate on the approach, the FCTM was specific that, if it did not remain stable, a GA should be initiated.
The commander may have given the co-pilot the benefit of doubt and believed she had the ability to correct an approach that became unstable in the final few hundred feet of the approach. However, had there been any doubt, a GA should be executed

Accident investigation:
Investigating agency: AAIB
Status: Investigation completed
Duration: 1 year and 4 months
Accident number: AAIB-27092
Download report: Final report
Language: English

Sources:
» AAIB

METAR Weather report:
02:20 UTC / 02:20 local time:
EGTE 190220Z 23010KT 9000 -RA SCT012 BKN040 12/10 Q1009=


Photos

photo of Boeing-737-4Q8-G-JMCY
accident date: 19-01-2021
type: Boeing 737-4Q8 (SF)
registration: G-JMCY
photo of Boeing-737-4Q8-G-JMCY
FDR readout
 

Video, social media

Aircraft history
date registration operator remarks
20 October 1994 N783AS Boeing first flight
1 December 1994 N783AS Alaska Airlines delivered
24 June 2009 VQ-BAO Aeroflot-Don registered
25 September 2009 VQ-BAO Donavia airline renamed
6 October 2015 2-VBAO Vx Capital Partners registered
February 2016 2-VBAO Vx Capital Partners Converted to freighter at Shanghai Pudong (PVG)
21 March 2016 G-JMCY West Atlantic UK registered

Plan
This map shows the airport of departure and the intended destination of the flight. The line is connecting ADS-B datapoints from Flightradar24.
La distance entre East Midlands Airport et Exeter Airport est de 272 km (170 miles).
Accident location: Approximate; accuracy within a few kilometers.

Les informations ci-dessus ne représentent pas l'opinion de la 'Flight Safety Foundation' ou de 'Aviation Safety Network' sur les causes de l'accident. Ces informations prélimimaires sont basées sur les faits tel qu'ils sont connus à ce jour.
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