Date:	Monday 21 April 1947
Time:
Type:	de Havilland DH.98 Mosquito NF Mk 36
Owner/operator:	85 Sqn RAF
Registration:	RL198
MSN:
Fatalities:	Fatalities: 0 / Occupants: 2
Aircraft damage:	Destroyed
Location:	RAF stn Tangmere, Chichester, West Sussex, England -   United Kingdom
Phase:	Taxi
Nature:	Military
Departure airport:	RAF Tangmere, West Sussex
Destination airport:	RAF West Malling, Kent

Narrative:
Mosquito RL198: W/O White and Sgt Collins went to RAF Tangmere to collect a Mosquito Aircraft. 21/04/1947. The Mosquito was being taxied downwind along the taxiway when it began to swing off the taxiway. The pilot applied the brakes, to correct the swing, but this proved ineffective, and therefore the pilot applied the port throttle to correct the swing; this only succeed in pushing the aircraft off the taxiway, and onto the wet grass. At the time of the incident there was a crosswind blowing at RAF Tangmere, which was gusting up to 40 knots. Sgt Robert Collins was at the controls when the brakes failed while taxiing. The Mosquito skidded on the wet grass and ran into parked Avro Anson NK235 at RAF Tangmere. Both aircraft were declared Damaged Cat. E.
Crew:
Sgt (????) Robert "Bob" COLLINS (pilot) RAFVR: Ok  
W/O ???? WHITE (nav.) RAFVR: Ok

Anson NK235 of the RAF Kenley Station Flight (the other aircraft involved in the collision) was also deemed as damaged beyond repair and struck off charge the same day.
The subsequent Board of Inquiry into the accident deemed that the Mosquito had suffered brake failure; this had been caused by grease on the brakes, after an aircraft fitter had failed to clean the preserving grease off the linings of the brakes prior to fitting them.

1.http://www.airhistory.org.uk/dh/_DH98%20prodn%20list.txtt
2.ORB 85 Sqdn RAF:
3.AIR27/2439/10
4.https://discovery.nationalarchives.gov.uk/details/r/D8420627
5.Halley, James (1999). Broken Wings – Post-War Royal Air Force Accidents.

Date/time	Contributor	Updates
20-Feb-2014 16:55	Nepa	Added
24-Jun-2014 16:40	Nepa	Updated [Location, Departure airport]
31-Jul-2015 19:36	Nepa	Updated [Aircraft type, Location, Narrative]
10-Feb-2019 16:55	Nepa	Updated [Total fatalities, Total occupants, Other fatalities, Source, Narrative, Operator]
25-Nov-2019 23:11	Dr. John Smith	Updated [Time, Location, Departure airport, Source, Narrative]
27-Nov-2019 09:50	Nepa	Updated [Aircraft type, Location, Departure airport, Destination airport, Source, Narrative, Operator]
14-Jul-2021 08:39	Coufal	Updated [Time, Operator]
19-Nov-2021 18:23	Nepa	Updated [Source, Narrative, Operator]
19-Nov-2021 23:23	Nepa	Updated [Narrative, Operator]
28-Aug-2022 22:34	Nepa	Updated [Departure airport, Destination airport, Narrative, Operator]
18-May-2023 14:49	Dr. John Smith	Updated [[Departure airport, Destination airport, Narrative, Operator]]
18-May-2023 15:55	Nepa	Updated [[[Departure airport, Destination airport, Narrative, Operator]]]
12-Oct-2023 20:23	Nepa	Updated [[[[Departure airport, Destination airport, Narrative, Operator]]]]