On the night 4/5 January 1942 the RAF bombers (Blenheims and Wellingtons) from Malta paid a visit to Castelvetrano (I have also seen Castel Vetrano and Castelveltrano as spelling) airfield on Sicily. At the time, the airfield was stuffed with Axis transport planes which gathered in the Med, either to resupply Africa, or to transport in units and supplies belonging to the Luftwaffe’s 2nd Air Fleet which had just started its camapign against Malta.
This aerial reconnaissance picture below shows the airfield and the Axis planes parked on it on the day before the successful attack, and it was probably the reason for the attack.
Vertical aerial reconnaissance view of Castelvetrano airfield, Sicily, the day before a successful attack was made on it by Malta-based Bristol Blenheims of Nos. 18 and 107 Squadrons RAF. A number of Junkers Ju 52 and Savoia Marchetti SM 82 transport aircraft, many of which were destroyed during the raid, can be seen parked around the airfield perimeter. © IWM (C 4183)
The after action report (AAR) of the Wellington attack makes interesting reading. 11 Wellington sorties were flown that night, with four a/c making the trip twice. One of the Wellingtons carried a 4,000 lb (1,800kg) “blockbuster” bomb, and appears to have managed to drop it right into the parked planes.
From the individual plane narratives:
Plane M […]He saw that most aircraft had been parked near the runway directly on the east of the aerodrome and that they looked like JU 52’s. […]
Plane Z dropped his 4,000lb [Blockbuster] bomb from 8,000 feet which landed just east of runway about two thirds of the way down from North-South. A terrific explosion resulted throwing up debris and dust. The target was visible when aircraft crossed the coast and showed up well.
Plane P No fires were burning when the aircraft arrived on the target at 0357 hours (Approximately 4.5 hours later than aircraft Z).
The attack went in in two waves, first four aircraft between 2041 and 2200. Then a single aircraft with the blockbuster bomb. A second wave from 0357 to 0525. Total bombs dropped were:
21 x 250lb GP
28 x 500lb GP
1 x 4,000lb GP
One aircraft failed to return, with the crew of Sgts. Lewthwaite, Pick, Chalmers, Bryan, and James. The Axis air forces lost six S.82s (one of which was used by the Germans), four Z1007bis, a CR42 and a Ju52, all of which were destroyed; in addition 42 more aircraft were damaged to various degrees: 22 S.82s, 15 Z1007bis, 2 FN305s, 2 CR42s and a MC200 (Thanks to Jon G. on AHF for the info). The S.82 were the biggest transport planes available in the Med at this stage, and losing 28 of them even if some were only out of service temporarily must have been a very big drain on overall Axis air transport capacity at a critical juncture.
(see also this prior post)