AARO
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◉ 35.6892° N · 51.3890° E · Mehrabad / Shahrokhi · 19 Sep 1976

Tehran 1976

On the night of 19 September 1976, the Imperial Iranian Air Force (IIAF) scrambled two McDonnell Douglas F-4D Phantoms from Shahrokhi Air Base to investigate a brilliant object reported by civilians and tracked on radar over Tehran. Both interceptor crews — Lt. Yaddi Nazeri in the first aircraft, Lt. Parviz Jafari in the second — reported that as they closed on the object, their weapons systems and UHF communications failed. The events were summarised in a U.S. Defense Intelligence Agency (DIA) Information Report dated 22 September 1976, declassified in 1977 and routed via the Defense Intelligence School as a "good example of a classic UFO report with several elements of high credibility".

Pilots: Lt. Yaddi Nazeri · Lt. Parviz Jafari (F-4)
Aircraft: 2× McDonnell Douglas F-4D Phantom
DIA report: DTG 21115Z Sep 76 · 6 D 105 76
Status: AARO HRR Vol. I — referenced unresolved
Read time: 3 min · 752 words

The DIA report (verbatim, 22 Sep 1976)

"A. The object was sighted by four separate locations. B. The object was a credible visual sighting. C. The object was a credible radar sighting. D. There were similar electromagnetic effects on three sites. E. There were physiological effects on some crew members (i.e., loss of night vision due to the brightness of the object). F. An inordinate amount of maneuverability was displayed by the UFO."

— DIA Information Report, 22 September 1976, paragraph 8. Routed to: NSA, CIA, DIA, White House, Secretary of State, Joint Chiefs of Staff.

The intercept sequence

The first F-4 (call sign Yaddi-1, flown by Lt. Nazeri with backseater Lt. Hossein Pirouzi) launched at ~01:30 local and proceeded toward the contact at 25,000 ft. On final approach the F-4 lost UHF and intercom communications + all instrumentation; Nazeri broke off contact and the systems returned. The second F-4 (Yaddi-2, Lt. Parviz Jafari + Lt. Damirian) launched, established radar lock at 27 nautical miles, and reported the contact closing to 19 nm before the lock dropped. As Jafari moved to fire an AIM-9 Sidewinder, his weapons-control panel and UHF radio both went dead simultaneously. Jafari turned away; both systems returned. A smaller object then detached from the primary and approached the F-4; Jafari attempted to fire on it, again experienced systems failure, broke off.

Why this case still matters

The Tehran 1976 events are the first publicly-acknowledged case of military weapons / communications systems being affected at close approach to a UAP. The DIA report was distributed widely within the U.S. intelligence community at a senior level and is regarded inside AARO as one of the canonical pre-2008 reference cases for electromagnetic-effects classification — a category that AARO's modern 10 U.S.C. § 1683 framework treats as a specific evidentiary signature. Lt. Jafari, who rose to brigadier general in the Iranian Air Force and survived the 1979 revolution, gave a sworn affidavit to the National Press Club in November 2007.

The voice on the tape

As I approached the target, my radar lock-on dropped, my UHF radio went dead, and my INS gave erroneous readings. When I broke off, everything came back. Then a smaller object came out of the main one and headed straight for my aircraft. I tried to fire — again, weapons went off-line. — Brig. Gen. Parviz Jafari, sworn statement, National Press Club, Washington D.C., 12 November 2007

Timeline

Linked evidence in this archive

Why this case still matters

Tehran 1976 sets the historical benchmark for the electromagnetic-effects evidentiary class in UAP investigation. The DIA cable's distribution list — NSA, CIA, JCS, White House Situation Room — represents the highest-level routing of any single UAP report in declassified U.S. intelligence history. AARO's modern multi-sensor framework treats EM-effects cases as a distinct attribution category descended directly from the Tehran precedent.

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