actually, the pakistani pilots played a side roll in the 1973 war in egypt. they were responsible for patrolling the airspace over Inshas airbase and none were involved in any air combat against israelis during that war.
Yom Kippur War - 1973
The PAF was active again in the Middle East sector after about 6 years. The PAF contingent deployed at Inchas Air Base (Egypt) was led by Wg.Cmdr. Masood Hatif and five other pilots plus two air defence controllers.
however, a pakistani pilot did get involved in air combat against an israeli reconaissance mission over syria in 1974 resulting in the loss of one israeli mirage:
During this war, Flt.Lt Sattar Alvi was decorated by the Syrian goverment when he shot down an Israeli Mirage over Golan Heights. On 26 April, 1974, in an encounter over Golan Heights between a Mig-21 of the Syrian Air Force, flown by Flight Lieutenant Sattar Alvi, PAF, and two Israeli Mirages. An added feature of this engagement was that the Air Defence Controller, Sqn Ldr Saleem Metla was also a Pakistani. While leading a Mig-21 patrol along the border, Sqn Ldr Arif Manzoor, also of the PAF was apprised of the presence of two Israeli Phantom aircraft and was cautioned that these could be decoys while two other fast tracks approaching from the opposite direction might be the real threat. The latter turned out to be Mirages and a moment later Alvi, in Arif’s formation saw the No 2 Mirage breaking towards him. All this time, heavy radio jamming by Israeli ground stations was making things difficult but the Pakistani pilots were used to such tactics. Sattar forced the Israeli pair into close combat, firing his K-13 missile at the first opportunity. The Israeli wingman’s Mirage exploded into a ball of fire, while the leader quickly disengaged.
the most direct significant pakistani contribution was in the 1967 war:
The Arab-Israel War - 1967
During this war, PAF sent a contingent of its pilots and airmen to Egypt, Jordan and Syria. PAF pilots performed excellently and downed about 10 Israeli planes including Mirages, Mysteres, Vautours without losing a single plane of their own. Flt.Lt. Saif-ul-Azam was decorated by Jordan and Iraq. The performance of PAF pilots was praised by Israelis too. Eizer Weizman, then Chief Of Israeli Air Force said once about Air Marshal Noor Khan (Commander PAF at that time): "...He is a formidable person and I am glad that he is Pakistani not Egyptian..." On 07 June 1967 Flight Lieutenant Saiful Azam, PAF, destroyed an Israeli Mirage in Iraq. In his second encounter with Israelis in the Middle East, he despatched one of the Mirages that were escorting the Israeli Vatour bombers. Moments later, he shot down one of the two escaping Vatour bombers. Two days earlier he had shot down an Israeli Super Mystere over Mafrak Air Base, Jordan. The officer was decorated with gallantry awards after the war both by Jordan and Iraq. He had already earned Sitara-i-Jurat during the 65 war when he shot down an Indian Gnat.
however, i do not know where global security is getting the figure of 10 airplanes downed from. Pakistan Air Force's official website / records state Saif ul Azam as having shot down 3 israeli planes but does not credit any other pilot with any other kills.
so, the official PAF records show 4 kills (3 in '67 and 1 in '74)