Thanks to everyone for their helpful replies.
With Najam's permission here is his original letter and email address
To Whom it May Concern,
I was recently researching my family history when i uncovered that my maternal great-uncle lost his life during an air accident, while on active duty in the Pakistani Air Force over Karachi in Pakistan in 1969.
I attempted to further research this tragic incident but I have failed to find anything of substance. I noticed on your website you have a Chronological Listing of Pakistani Ejections and Losses, I also noticed that you have a listing for April 23rd 1969, of which there are no further details. It was around this very time that the previously mentioned incident took place.
If you could provide any additional information regarding the details of the incident, or as to where you acquired the date then I would be very grateful indeed. In return I would willing to provide crew details and corresponding photographs.
email
sonnyjim.najam@gmail.com
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Does anyone have any further deatils of Sqn Ldr M A Chaudhury.
Did the PAF have any two seat F-86s [TF-86F] - that may be an explanation of the 23rd April 1969
Best regards
Mike Bennett