In October 1938, teniente Medizabal served in Grupo 3-G-3.

During the morning, comandante Joaquín García Morato led 24 CR.32s from Grupos 2-G-3 and 3-G-3 on an escort mission for Ro.37s on the Ebro front. They encountered 28 I-16s escorting 24 I-15s that had been undertaking strafing attacks, comandante Morato and 12 fighters from 3-G-3 attacking the biplane fighters at low level, two of which were claimed shot down by Tenientes Medizabal and Emelio O’Connor Valdivielso (4-E-3). Twelve other fighters from 2-G-3 tackled the I-16s at a higher altitude, but they soon found themselves badly outnumbered.
As the I-15 escuadrillas withdrew towards Republican lines, Morato and his pilots broke off their attacks and gained height in order to aid their compatriots in the struggle against the I-16s. Morato attacked a Rata from the rear, quickly setting it on fire, but at the same time another CR.32 pilot targeted the same I-16 from an acute angle. A 12.7 mm bullet fired by the second Fiat hit the engine of Morato’s fighter, knocking it out. Still some 12 miles behind enemy lines, but at medium altitude, he used all his skills to glide the engineless CR.32 to within sight of the frontline, before he was forced to perform a dead-stick landing in a vineyard. His aircraft suffered no further damage when he landed. This was the only time that Morato was shot down in combat, albeit not through enemy action but accidentally by his wingman during the heat of battle (according to other sources, Morato was shot down by teniente Sirvent Cerrillo).
The fighter shot down by Morato (although not credited to him) was an I-16 Type 10 from 3^a Escuadrilla, and it was seen to explode in mid-air. Another I-16 (CM-061), this time from 7^a Escuadrilla was destroyed over Corbera by teniente de Hemricourt (2-E-3), de Hemricourt seeing its pilot bail out over Republican territory. A third I-16 Type 10 was hit in the propeller and main-wheel doors by bullets from a CR.32 and its pilot crash-landed near Reus, from where it was recovered.
Republican pilots, in return, claimed nine CR.32s shot down, although in actual fact only one had been lost. However, the pilot downed was none other than the commander of Escuadrilla 1-E-3, capitán Julio Salvador (CR.32ter NC 753/3-69), who was shot down after claiming two enemy aircraft. According to Republican witnesses, his CR.32 had been hit near Fayón early on in the engagement with the I-16s. Salvador’s opponent was the second-in-command of Grupo N^o 21, José Maria Bravo Fernández (according to other sources, Salvador was shot down by teniente Francisco Meroño Pellicer, CO 6^a/21, who claimed a CR.32 during the day). The nationalist pilot was taken prisoner by soldiers of the 46th Division of the Popular Army, commanded by the famous communist leader Valentin Gonzalez.
Salvador was eventually set free in France along with other pilot detainees held by the Republicans after four months in prison.
The I-15s of Grupo N^o 26 claimed four CR.32s (three by 1^a/26 and one by 3^a/26) during the day while the I-16s of Grupo N^o 21 claimed nine CR.32s (three by 4^a/21, two by 7^a/21, three by 1^a/21 and one by 6^a/21).
I-16s CM-261 and CM-263 (both from 3^a/21) were destroyed during the day.

Medizabal ended the war with 1 biplane victory.

Claims:

Kill no.	Date	Time	Number	Type	Result	Plane type	Serial no.	Locality	Unit
	1938
1	03/10/38	morning	1	I-15 (a)	Destroyed	CR.32		Ebro area	3-G-3

Biplane victories: 1 destroyed.
TOTAL: 1 destroyed.
(a) Republican pilots claimed at least 13 CR.32s during the day (on all fronts) while losing at least 3 I-16s. Grupos 2-G-3 and 3-G-3 claimed 5 enemy aircraft while losing 1 CR.32.

Sources:
Fiat CR.32 Aces of the Spanish Civil War - Alfredo Logoluso, 2010 Osprey Publishing, Oxford, ISBN 978-1-84603-983-6
Additional information kindly provided by Alfredo Logoluso.