Rafael Pacheco Pérez 'voice' case
A Mexican student pilot's light plane reportedly vanished from radar and reappeared over Acapulco, while a voice speaking through him on the radio claimed to be extraterrestrial.
1976 CE · 16.76, -99.88 · status: claim
The account
Mexican press accounts say that on 21 June 1976 Rafael Pacheco Pérez, a student at the Escuela de Aviación de México, flew a small Cessna (registration given as XB-ZOX) out of Mexico City and turned up over Acapulco far sooner than the trip should take. Acapulco controller Carlos de Kretschy later said a calm voice speaking through the pilot claimed to come from beings who were using him as a 'microphone' and said humanity is not alone. Pacheco said he remembered almost nothing, was found sober by doctors, and never flew again. MrBallen discussed an 'aliens hijacking an aircraft' story on the Shawn Ryan Show (episode #249).
The sceptical view
Everything rests on the controller's recollection, told decades later. No official record, transcript or authenticated audio has been published; accounts disagree on the frequency, the timing and even whether Pacheco was a student, and the 85,000 ft altitude in one version is impossible for a Cessna 150. Disorientation, a prank or simple embellishment are ordinary possibilities.
The researched reading
A dramatic story with no records behind it. Light planes dropping off radar is ordinary, and the “alien voice” rests on retellings that disagree with each other. Until logs or a recording turn up, it is best read as a legend built around a real flight.
| Explanation | Weight | Why |
|---|---|---|
| Undetermined | 30% | The share the reading had given to fabrication on doubt rather than evidence: the record does not settle it either way. |
| Perception, memory or mind | 25% | A tired student pilot on a solo flight who later remembered only overwhelming sleepiness fits fatigue, hypoxia or a dissociative episode, and an odd-sounding radio voice is easy to over-read after the fact. |
| A hoax or fabrication | 15% | No radar log, flight record, investigation file or verifiable recording has been produced; the story spread mainly through viral posts, podcasts and 2026 film tie-ins, and details such as the wording and fuel state change between versions, the mark of a legend growing in the telling. |
| A known natural phenomenon | 12% | Temperature inversions bend radar beams and create or erase returns; a later version of the story itself says the Air Force put the radar gap down to an inversion. |
| Something known, misidentified | 8% | A light aircraft dropping off 1976 primary radar over the mountains between Mexico City and Acapulco is routine: low altitude and terrain masking hide small planes, so the “vanishing” needs no exotic cause. |
| Genuinely anomalous | 6% | If the core facts (lost time, near-full tanks, the voice) were documented they would be striking, but none of them can currently be checked against a primary record. |
| A poorly understood natural phenomenon | 2% | Nothing in the account points to a luminous or plasma phenomenon; this is kept only for completeness. |
| Secret human technology | 2% | There is no plausible secret technology that would take over a pilot’s voice; listed for completeness. |
Official position: No official report is available; later retellings say Mexican authorities examined the pilot and blamed the radar gap on a temperature inversion.