20181003016629A

Accident · Substantial damage

FAA accident report · Beech 1900C · Gambell, AK · October 3, 2018

Date
October 3, 2018 · 15:31 local
Place
Gambell, AK
Airport
Gambell
Phase of flight
Landing: Touchdown
Operating rules
Air taxi and commuter (Part 135)
Operator
EPUA
Damage
Substantial damage
Aircraft
N575Q
NTSB investigation
NTSBANC19CA002
Reported as
Beech 1900C
Reported engine
Pratt & Whitney PT6A series
People aboard
9
Fatal injuries
0
Other injuries
0
Pilot’s certificates
Airline transport, commercial pilot, private pilot
Pilot’s flight hours
4,299 total149 in this make and model221 in the last 90 days

From the FAA’s Accident/Incident Data System (AIDS), through its Aviation Safety Information Portal, as reported. The NTSB investigates accidents separately, and its record of an accident is the fuller one. The aircraft is matched to the registry by N-number and event date, checked against the reported make and model; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.

What happened

The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.

On October 3, 2018, at approximately 2335Z, N575Q encountered a tailstrike during landing. This was classified as an accident due to structural damage to the aft portion of the fuselage.

Analysis of the weather indicated the prior 3 observations were steady wind at 22-24KTS, direct x-wind, below the aircraft's max demonstrated x-wind component. These observations were spaced 5 minutes apart. At the time of the accident, the wind gusted to 38KTS of x-wind. Although the previous 4 weather reports indicated steady wind, the pattern of occasional gusts exceeding 35KTS could be seen when looking at all of the observations from the surface observation station on that day.

There was an AIRMET in effect for strong sustained surface winds in excess of 30KTS, intensifying during the period. The body of the area forecast indicated surface wind e-se 30G40KTS sw of the bering strait. Using runway 16, this would put the x-wind component at 31KTS.

The conclusion of these data is that the flight crew lost control of the aircraft during landing due to an x-wind gust and there was a failure of the operational control center (dispatch) and flight crew to anticipate these conditions based on the weather data available and historical data of mechanical turbulence and gusts in this location.

As the FAA filed it

ON OCTOBER 3, 2018, AT APPROXIMATELY 2335Z, N575Q ENCOUNTERED A TAILSTRIKE DURING LANDING. THIS WAS CLASSIFIED AS AN ACCIDENT DUE TO STRUCTURAL DAMAGE TO THE AFT PORTION OF THE FUSELAGE.

ANALYSIS OF THE WEATHER INDICATED THE PRIOR 3 OBSERVATIONS WERE STEADY WIND AT 22-24KTS, DIRECT X-WIND, BELOW THE AIRCRAFT'S MAX DEMONSTRATED X-WIND COMPONENT. THESE OBSERVATIONS WERE SPACED 5 MINUTES APART. AT THE TIME OF THE ACCIDENT, THE WIND GUSTED TO 38KTS OF X-WIND. ALTHOUGH THE PREVIOUS 4 WEATHER REPORTS INDICATED STEADY WIND, THE PATTERN OF OCCASIONAL GUSTS EXCEEDING 35KTS COULD BE SEEN WHEN LOOKING AT ALL OF THE OBSERVATIONS FROM THE SURFACE OBSERVATION STATION ON THAT DAY.

THERE WAS AN AIRMET IN EFFECT FOR STRONG SUSTAINED SURFACE WINDS IN EXCESS OF 30KTS, INTENSIFYING DURING THE PERIOD. THE BODY OF THE AREA FORECAST INDICATED SURFACE WIND E-SE 30G40KTS SW OF THE BERING STRAIT. USING RUNWAY 16, THIS WOULD PUT THE X-WIND COMPONENT AT 31KTS.

THE CONCLUSION OF THESE DATA IS THAT THE FLIGHT CREW LOST CONTROL OF THE AIRCRAFT DURING LANDING DUE TO AN X-WIND GUST AND THERE WAS A FAILURE OF THE OPERATIONAL CONTROL CENTER (DISPATCH) AND FLIGHT CREW TO ANTICIPATE THESE CONDITIONS BASED ON THE WEATHER DATA AVAILABLE AND HISTORICAL DATA OF MECHANICAL TURBULENCE AND GUSTS IN THIS LOCATION.

NTSB investigation

The NTSB’s investigation of this event, with its probable cause and findings. Matched to this report by N-number and date.