36 Years ago today: On 6 October 1981 an NLM Cityhopper Fokker F-28 crashed near Moerdijk after losing control when encountering a tornado, killing all 17 occupants.

Date:Tuesday 6 October 1981
Time:17:12
Type: Fokker F-28 Fellowship 4000
Operator:NLM Cityhopper
Registration:PH-CHI
C/n / msn:11141
First flight:1979-01-12 (2 years 9 months)
Total airframe hrs:4485
Cycles:5997
Engines:Rolls-Royce Spey 555-15P
Crew:Fatalities: 4 / Occupants: 4
Passengers:Fatalities: 13 / Occupants: 13
Total:Fatalities: 17 / Occupants: 17
Airplane damage:Destroyed
Airplane fate:Written off (damaged beyond repair)
Location:2 km (1.3 mls) SSW of Moerdijk (   Netherlands)
Phase:En route (ENR)
Nature:Domestic Scheduled Passenger
Departure airport:Rotterdam Airport (RTM/EHRD), Netherlands
Destination airport:Eindhoven Airport (EIN/EHEH), Netherlands
Flightnumber:HN431

Narrative:
An NLM Cityhopper Fokker F-28 Fellowship was destroyed when it crashed in an industrial area near Moerdijk, Netherlands. All 17 on board were killed.
The aircraft, named “Eindhoven”, operated flight HN431 from Rotterdam Airport, Netherlands to Eindhoven, Netherlands and Hamburg, Germany. During the weather briefing at Rotterdam Airport, 44 minutes before takeoff, the crew was told about the presence of an area with thunderstorms to the south and east of Rotterdam.
At 17:04 hours local time the F-28 took off from Rotterdam Airport. About five minutes after takeoff the crew noted heavy rainfall in thunderstorms on the weather avoidance radar and received clearance to avoid this area. Course was changed to the south in order to pass between two major thunderstorm cores.
At 17:12 the aircraft entered a tornado, which resulted in loads on the airframe increasing to +6.8 G and -3,2 G. The right wing was bent upwards followed by a severe downward sweep. This compromised the structural integrity of the wing, causing a large portion of the outer wing to separate in an upward and rearward motion. Control was lost and the aircraft impacted a railway bridge inverted.

Probable Cause:

The investigation report did not contain a probable cause statement per ICAO Annex 13.