Date:	Sunday 27 June 1943
Time:	15:25
Type:	de Havilland DH.98 Mosquito NF Mk II
Owner/operator:	307 (Lwowskich Puchaczy) Sqn RAF
Registration:	DD644
MSN:	EW-Y
Fatalities:	Fatalities: 2 / Occupants: 2
Other fatalities:	0
Aircraft damage:	Destroyed
Location:	field Fair Acres Farm, near Pennard, Swansea, West Glamorgan, Wales -   United Kingdom
Phase:	Initial climb
Nature:	Test
Departure airport:	RAF Fairwood Common, West Glamorgan
Destination airport:	RAF Fairwood Common

Narrative:
Mosquito DD644/Y: Took off for test flight (engines) after major repair. 27/06/1943
Aircraft was being tested after a 240 hours major inspection. Two minutes after take off from RAF Fairwood Common the starboard engine caught fire and the aircraft crashed in a field near Pennard near Swansea.
Crew:
F/Lt (P.0191) Roman GRZANKA (pol. pilot) PAF - seriously injured, died the next day
F/Sgt (P.793495) Waclaw OYRZANOWSKI (pol. Eng.mech.) PAF - seriously injured, died the next day

Details:
Mosquito DD644 She was taken off flying duties for a major overhaul on her engines which had reached their 240-hour inspection. On the 27th of June she took off on an air test, piloted by F/O Grzanka and ‘C’ flight chief mechanic Waclaw Oyrzanowski as a passenger to observe the engines.
The squadron records:
“27-6-43. Weather fine. Training continued and 4 patrols totalling 8 hours were flown at night. We regret to have to record a fatal accident. F/Lt Granka was making an engine test with F/Sgt Oyrzanowski, chief mechanic of ‘C’ flight as a passenger. They were testing an aircraft after a major overhaul. The A/C was flying low and crashed a mile south of the airfield, the cause is unknown at present. F/Lt Granka was killed, and F/Sgt Oyrzanowski died the next day at hospital.”
The reason of the crash turned out to have been caused with the port engine catching fire soon after take-off. Granka immediately turned for home and coming in from the sea, crossing the coast near Pwll Ddu. It was seen at 15:20hrs losing height with the engine on fire, at 15:25hrs they hit the ground, crashing into a hedgerow on the outskirts of Pennard.

1.http://www.airhistory.org.uk/dh/_DH98%20prodn%20list.txtt
2.ORB 307 Sqdn RAF
3.http://www.polishsquadronsremembered.com
4.http://www.ggat.org.uk/timeline/pdf/Military%20Aircraft%20Crash%20Sites%20in%20Southeast%20Wales
5. https://www.cwgc.org/find-war-dead/casualty
6. http://www.polishwargraves.nl/brit/4403.htm
7. http://ukgo7.com/cmn2/RAF%20Pembrey%20Web%20Details.pdf

Date/time	Contributor	Updates
29-Dec-2009 08:10	NePa	Added
13-Feb-2010 10:15	NePa	Updated [Narrative, ]
04-Nov-2011 01:50	Nepa	Updated [Source, Narrative, ]
12-Feb-2012 02:36	Nepa	Updated [Operator, Departure airport, ]
27-May-2014 17:24	Nepa	Updated [Aircraft type, Operator, Departure airport, Source, Narrative, ]
29-Jul-2014 15:35	DB	Updated [Total fatalities, Location, Narrative, ]
17-Mar-2015 10:35	Heil	Updated [Location, ]
27-Jul-2015 18:58	Nepa	Updated [Aircraft type, ]
23-Nov-2015 07:09	DB	Updated [Cn, Total fatalities, Location, Narrative, ]
25-Mar-2019 09:17	Nepa	Updated [Location, Narrative, Operator, ]
28-Apr-2019 01:26	Dr. John Smith	Updated [Time, Location, Phase, Departure airport, Destination airport, Source, Narrative, ]
28-Apr-2019 01:27	Dr. John Smith	Updated [Narrative, ]
04-Sep-2019 19:35	Nepa	Updated [Location, Departure airport, Destination airport, Source, Narrative, Operator, ]
18-Sep-2019 20:33	TigerTimon	Updated [Embed code, ]
28-Dec-2021 21:51	Nepa	Updated [Time, Source, Narrative, Operator, ]
21-Apr-2022 20:43	Nepa	Updated [Location, Narrative, Operator, ]
12-Jun-2023 07:07	Davies 62	Updated