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On 3rd May 2019 a 737-800, N732MA (30618/830) was landing at Jacksonville Naval Air Station,FL (KNIP) runway 10 at 21:42L (01:42Z 4th May) when it overran and came to rest in shallow water in St. John's River approximately 380m (1250 feet) past the end of the runway.

The aircraft was was partially submerged. The flight was carrying 136 passengers and 7 crew. No fatalities but 22 people were taken to hospital with minor injuries.

The NTSB reported on 5/5/19 that from preliminary FDR information, the IAS at touchdown was 163 knots, 178 knots over ground (15Kt TWC), with flap 30 and LH thrust reverser inop.

KNIP 040145Z 29008G16KT 3SM +TSRA BR SCT008 BKN015CB OVC032 24/22 A2999 RMK AO2 TSB04 FRQ LTGIC OHD TS OHD MOV E T1 SET P0063 T02440222 $=

Runway 10/28 LDA 9003ft / 2700m

The NTSB investigation docket is available here.

The final report is available here.

On 1 Jun 2019 the NTSB released an investigative update in which there were various exchanges between the pilot and ATC about the weather and choice of runways.

At 2124:55, the KNIP tower controller advised that both runways were “pretty rough,” the runways were “pretty socked in,” and the winds favored RWY28.

At 2130:03, the JAX controller advised the pilot that the flight was heading northbound and the precipitation was moving eastbound; the controller then asked the pilot if he would like to try RWY10 since it might be better. The pilot acknowledged "yeah go ahead, let’s do it."

At 2139:49, the KNIP radar controller indicated the winds were from 240° at 10 knots; he then cleared the flight to land on runway 10.

At 2142:22, the emergency locator transmitter (ELT) was heard on the frequency.

The airplane impacted a rock embankment at the end of the runway 10 overrun area before coming to rest in the St. Johns River about 1,200 ft from the end of runway 10. The center of the airplane was about 100 ft east of the river’s shoreline and about 75 ft south of the runway 28 landing light pier. The water where the airplane came to rest was 3-5 ft deep, depending on the tidal conditions. The embankment had a distinct area of disturbed rocks, consistent with the engines and main landing gear impacting the embankment. The airplane was mostly intact, but both main landing gear had separated from the airplane and were also located in the river.

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Probable Cause and Findings

An extreme loss of braking friction due to heavy rain and the water depth on the ungrooved runway, which resulted in viscous hydroplaning. Contributing to the accident was the operator’s inadequate guidance for evaluating runway braking conditions and conducting en route landing distance assessments. Contributing to the continuation of an unstabilized approach were 1) the captain’s plan continuation bias and increased workload due to the weather and performing check airman duties and 2) the first officer’s lack of experience.

Photo from Jacksonville Sheriffs office twitter feed


.Photo from NTSB

A time lapse video of the recovery of the aircraft can be found here:

The full final report can be found here

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