Investigation Summary
During the NATO exercise 'Checkmate', two pilots from Jagdbombergeschwader 32 were tasked with a triangular flight route within West Germany. Shortly after departure, the lead aircraft's compass began misreading by 40 to 60 degrees. This technical failure was compounded by a strong westerly wind that pushed the aircraft further off course than the pilots realized. The crew misidentified Liège in Belgium as Reims in France, indicating significant disorientation. As they turned east, they were tracked by NATO radar near Warburg heading toward Königs Wusterhausen, but the pilots missed radio warnings to turn back because they were preoccupied with internal cockpit communication. Upon entering East German airspace, the aircraft flew deep into the territory. Realizing they were lost while north of Leipzig, the lead pilot issued a Mayday call that was received by the French-controlled Tegel Airport in West Berlin. At the time, no fewer than 42 Soviet interceptors were reportedly scrambled to engage the intruders. A controller at the Berlin Air Route Traffic Control Center directed the F-84s to Tegel, advising them not to turn back toward the pursuing Soviet fighters. The pilots successfully evaded the interceptors by hiding in a thick cloud layer, eventually landing at Tegel. The aircraft were immediately hidden in hangars by French authorities to prevent Soviet inspection or public photography.
Final Conclusions
The investigation attributed the incident to a combination of mechanical failure (a faulty compass) and human factors, including navigational errors and poor radio discipline. The political fallout was severe: West German Defence Minister Franz-Josef Strauß and Air Force Inspector Josef Kammhuber initially bypassed a formal investigation to summarily dismiss the wing commander, Siegfried Barth, in what became known as 'Beer Order 61'. Subsequent formal investigations exonerated Barth three times, leading to his eventual reinstatement and contributing to the eventual resignation of Minister Strauß following the related Spiegel scandal. The two aircraft involved were never flown out of Berlin; they were buried at Tegel Airport and rediscovered during construction work in the 1970s, though their identity and fate were not publicly confirmed until a 2006 exhibition at the Luftwaffenmuseum Berlin-Gatow.
Video Analysis
No video analysis linked for this case file yet.
Crew Experience
Pilot
Feldwebel Peter Pfefferkorn (Checkmate Lead)
Pilot
Stabsunteroffizier Hans Eberl (Checkmate Wingman)
Systems & Failure Modes
Compass
The primary navigational instrument on the lead aircraft failed, providing readings that were inaccurate by up to 60 degrees.
Radio Communications
The crew failed to maintain a listening watch on external frequencies while attempting to troubleshoot their position, causing them to miss critical warnings from NATO radar controllers.
Interesting Facts
- 01The incident occurred during a period of high Cold War tension, just one month after the construction of the Berlin Wall began.
- 02West German aircraft were strictly prohibited from flying to West Berlin under Allied occupation rules.
- 03The two F-84F aircraft were buried at Tegel Airport to avoid further diplomatic provocation and were rediscovered in the 1970s.
- 04The summary dismissal of the wing commander led to a legal battle that reached the military ombudsman.
- 05The pilots were permanently banned from flying and reassigned to ground duties.
Safety Actions & Advisories
Reinstatement of Commander Barth
Following three investigations that cleared him of negligence, Oberstleutnant Siegfried Barth was reinstated to his position, establishing a precedent against arbitrary summary dismissals in the Bundeswehr.
Known Controversies & Unanswered Questions
Bier Order 61
Reference ↗The summary dismissal of the unit commander by Minister Strauß and General Kammhuber, reportedly decided over drinks without a formal hearing, led to a major domestic scandal regarding military justice.
Fate of the Aircraft
Reference ↗For decades, rumors persisted that the planes were repainted as USAF aircraft or disassembled; it was not confirmed until 2006 that they had been buried at Tegel Airport.