KARACHI, Pakistan — A Pakistan-registered Boeing 737-400 cargo plane operated by K2 Airways vanished over the Arabian Sea on Tuesday night while en route from Sharjah, United Arab Emirates, to Karachi, prompting an extensive search and rescue operation involving multiple agencies. The aircraft, carrying five crew members and no passengers, lost contact after reporting a navigation system issue, with preliminary tracking data showing erratic altitude changes before a steep descent.

Here are 10 essential details about the incident based on available information from authorities and flight tracking services:

Flight Details and Route: The aircraft, registration AP-BOI, was operating flight KTA1732 as a cargo service from Sharjah International Airport to Jinnah International Airport in Karachi. It departed on the evening of July 7 and was approximately 155 nautical miles west of Karachi when contact was lost.

Crew Composition: Five Pakistani crew members were aboard: Captain Muhammad Rizwan Idris, First Officer Faisal Jatui (or Faisal Mehmood in some reports),........

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