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Air crash in Giebnia

11 Dec 1969 · Giebnia

Polish Air Force Ilyushin Il-28 · Cabin depressurisation or deployment of flaps at excessive speed

From Powidz Military Airport to an unrecorded destination

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Event

Event typeAccident: someone killed or seriously injured, or the aircraft substantially damaged (NTSB definition). Incident: an occurrence that affected or could have affected safety, short of that. Glossary
Accident
Event fatalities
3 · all aircraft and ground
Ground fatalities
Unknown
Occupants
Unknown
Survivors
Unknown
InjuriesFatal: death within 30 days. Serious: over 48 hours in hospital within a week, most broken bones, severe bleeding, nerve or organ damage, or serious burns. Minor: anything less. Glossary
0
OperationWhat kind of flying it was, grouped by the rules it flew under: airline (US Part 121), air taxi and commuter (Part 135), general aviation (Part 91 and similar), military or government. Glossary
Military

Ilyushin Il-28

Flight
766
Aircraft type
Ilyushin IL-28
Category
Airplane · from aircraft type
RegistrationThe aircraft's tail number, such as N12345 or G-ABCD. Registrations are reissued, so the same one years apart can be a different aircraft. Glossary
Unknown
Onboard fatalities
3
Route
From Powidz Military AirportTo not recorded

Approximate · Coordinates from the Wikipedia article; not checked against an investigation report.

From the Wikipedia article

The air crash in Giebnia – the air crash of a military Il-28 aircraft of the 7th Reconnaissance-Bomber Aviation Brigade, which occurred on 11 December 1969 during a training flight on the route Powidz–Toruń training ground–Golub-Dobrzyń–Powidz.

Before the crash

It was 11 December 1969. The crew of the Il-28 bomber aircraft, consisting of: Lt. Jan Grymuza (pilot with 600 flight hours on Po-2, TS-8 Bies, UTIMiG-15, Lim-1, Lim-2, Il-28 aircraft), Lt. Bonifacy Hędzelewski (2nd class navigator) and Cpl. Ryszard Jędras (gunner-radio operator), took off from Powidz on a flight with the code name 766 towards Toruń and Golub-Dobrzyń, performing a navigation flight. Contrary to much of the information appearing in the media, the crew was not performing a practice bombing on that day. After reaching the last point on the route, the pilot changed course and directed the aircraft back to its home airfield in Powidz.

The crash

The machine increased its flight level to 11,000 m. In the area of the town of Janikowo the aircraft began a descent at high speed. During it the pilot extended the flaps, which led to one of them being torn off, and most probably cabin depressurisation occurred. The crew were unable to control the machine, as they probably lost consciousness, and the flight altitude was in any case too low to leave the aircraft and bail out with a parachute. The aircraft crashed in fields in the area of the village of Giebnia between two towns: Pakość and Janikowo. There is a hypothesis that the crew did not lose consciousness and deliberately tried to make an emergency landing in an uninhabited area, but this version has not been confirmed. The accident commission concluded that the probable cause of the crash was the crew's failure to observe the rules for operating the equipment while performing a manoeuvre on the approach to landing, by extending the flaps at high flight speed. However, no version was fully proven and the crash was officially deemed unexplained. The Aircraft Accident Investigation Commission in its reports did not decide that the pilot was to blame for the accident, as was maintained for years.

Translated into English with AI assistance from the Polish Wikipedia article “Katastrofa lotnicza w Giebni” (revision 76908076, retrieved 2026-09-19) by its authors, under CC BY-SA 4.0. Extracted as plain text: references, tables, images and some sections are left out; the translation may contain errors, and long articles were cut to their first 700 words. Read the article

Sources

Polish Wikipedia article: Katastrofa lotnicza w Giebni
Article
Katastrofa lotnicza w Giebni
Translation
Into English with AI assistance; names of linked operators and aircraft types from Wikidata. It may contain errors.
Revision
76908076 · 2025-05-31 · retrieved 2026-09-19
Wikidata
Q24941578
Licence
Text CC BY-SA 4.0, by the article's authors; Wikidata CC0; town positions GeoNames (CC BY 4.0)
Where each value comes from
Record
pl Wikipedia article "Katastrofa lotnicza w Giebni" (page 3502311, revision 76908076), translated into English with AI assistance
Date
Wikipedia infobox: date
Place and country
Wikipedia infobox: site; country from Wikidata (P17)
Map position
Wikipedia article coordinates
Aircraft, operator and route
Wikipedia infobox: aircraft type, registration, operator, origin and destination; route airports from the linked airport articles' Wikidata codes (OurAirports)
Operation
operator named as an armed force or military unit in the infobox
Fatalities
Wikipedia infobox: aircraft fatalities
Ground fatalities
not stated in the Wikipedia infobox
Summary
Wikipedia infobox: summary
Source notes (1)
  • Wikipedia · Facts from the Polish Wikipedia article's infobox, translated into English with AI assistance, not checked against an investigation report. Independent review pending.