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1946 Railway Air Services Dakota crash

19 Dec 1946 · 1 km North-East of Northolt Aerodrome, London, United Kingdom

Douglas Dakota 3 · Failure to climb due to snow and ice contamination of the wings

From RAF Northolt (NHT) to Renfrew Airport, Glasgow, United Kingdom

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Event

Event typeAccident: someone killed or seriously injured, or the aircraft substantially damaged (NTSB definition). Incident: an occurrence that affected or could have affected safety, short of that. Glossary
Accident
Event fatalities
0 · all aircraft and ground (occupants minus survivors)
Ground fatalities
Unknown
Occupants
5
Survivors
5
InjuriesFatal: death within 30 days. Serious: over 48 hours in hospital within a week, most broken bones, severe bleeding, nerve or organ damage, or serious burns. Minor: anything less. Glossary
Unknown
OperationWhat kind of flying it was, grouped by the rules it flew under: airline (US Part 121), air taxi and commuter (Part 135), general aviation (Part 91 and similar), military or government. Glossary
Airline

Douglas Dakota 3

Aircraft type
Douglas Dakota 3
Category
Airplane · from aircraft type
RegistrationThe aircraft's tail number, such as N12345 or G-ABCD. Registrations are reissued, so the same one years apart can be a different aircraft. Glossary
G-AGZA
Onboard fatalities
0 (occupants minus survivors)
Route
From RAF Northolt (NHT)To Renfrew Airport, Glasgow, United Kingdom

Cause areas

  • Aircraft › Fluids/misc hardware
  • Personnel issues › Action/decision

From the investigation findings the Wikipedia article reports, sorted into the NTSB's cause areas with AI assistance.

Approximate · Coordinates from the Wikipedia article; not checked against an investigation report.

From the Wikipedia article

The 1946 Railway Air Services Dakota crash was the crash of a Douglas Dakota 3 of the British airline Railway Air Services 1 km north-east of Northolt Airport, London, United Kingdom on 19 December 1946.

Crash

The Railway Air Services Dakota was ready to depart from Northolt Aerodrome, London, United Kingdom on a scheduled service to Renfrew Airport (Glasgow) on behalf of Scottish Airways and had a total of four crew and one passenger on board. The aircraft had been de-iced since it was a cold, snowy evening which had delayed the departure. While the Dakota was waiting the temperature dropped and snow began falling which froze on the wings. The aircraft was finally ready for departure and taxied into position for take-off. The snow storm had closed the airport to incoming traffic and outbound traffic was subject to long delays. The aircraft had been waiting for more than an hour for clearance. When the flight received clearance, the pilot ran the engines up to 45.5 inches of manifold pressure and 2,500 RPM.

When the pilot accelerated down the runway he noticed that when the aircraft lifted off, it could not gain any height. The ice on the wings disturbed the air flow, which resulted in the aircraft not gaining any height. It was however too late to abort take-off so the pilot was forced to try to get the aircraft to climb. The aircraft flew only a few metres high straight down Angus Drive from the end of the runway until the left wing contacted some rooftops and the aircraft slewed through 90 degrees and came to rest on the roofs of two houses at 44 and 46 Angus Drive in the London suburb of South Ruislip.

G-AGZA was severely damaged and radio officer Murdoch was fortunate that he was not sitting in his seat as some metalwork was pushed through the seat and it would probably have killed him had he been sitting there. Irene Zigmund and her 4-month old-son David were in one of the houses (44 Angus Drive) at the time, but the aircraft came to rest on the roof without even waking the child who was asleep in his cot upstairs. In fact no one was injured in the incident, the crew and passenger all descended into the house's loft, down the loft ladder onto the landing and then down stairs out the front door. The aircraft was a total loss and the house was badly damaged. Repairs were completed within six months, although oil stains would re-appear in the ceilings for the next 10 years.

Investigation and cause

Investigation

It was quickly determined that the cause of the crash was the snow which had frozen to the aircraft's wings while G-AGZA was waiting to take-off, resulting in the aircraft not gaining any height. The house it landed on was subsequently nicknamed "Dakota Rest". The pilot was also assigned a cause factor for an error in judgement by taking off "when the aircraft was almost entirely covered with snow." The crash landing on the houses earned the captain the nickname "Rooftop Johnson".

Text from the Wikipedia article “1946 Railway Air Services Dakota crash” (revision 1354228542, retrieved 2026-09-18) by its authors, under CC BY-SA 4.0. Extracted as plain text: references, tables, images and some sections are left out. Read the article

Sources

Wikipedia article: 1946 Railway Air Services Dakota crash
Article
1946 Railway Air Services Dakota crash
Revision
1354228542 · 2026-05-15 · retrieved 2026-09-18
Wikidata
Q23808587
Licence
Text CC BY-SA 4.0, by the article's authors; Wikidata CC0; town positions GeoNames (CC BY 4.0)
Where each value comes from
Record
Wikipedia article "1946 Railway Air Services Dakota crash" (page 49328198, revision 1354228542)
Date
Wikipedia infobox: date
Place and country
Wikipedia infobox: site
Map position
Wikipedia article coordinates
Aircraft, operator and route
Wikipedia infobox: aircraft type, registration, operator, origin and destination; route airports from the linked airport articles' Wikidata codes (OurAirports)
Operation
operator is an airline according to Wikidata
Fatalities
Wikipedia infobox: aircraft fatalities (aircraft occupants minus survivors)
Ground fatalities
not stated in the Wikipedia infobox
Summary
Wikipedia infobox: summary
Source notes (1)
  • Wikipedia · Facts from the Wikipedia article's infobox and coordinates, not checked against an investigation report. Independent review pending.