The Tragic 1996 Croatia USAF Boeing CT-43 Crash
The 1996 Croatia USAF Boeing CT-43 Crash in April 1996 at 3 km (1.9 mi) north of Dubrovnik Airport, Dubrovnik, Croatia, involving the Boeing CT-43A. Explore full details and historical context.
On April 3, 1996, a United States Air Force Boeing T-43A (the military designation for the Boeing 737-200) was completely destroyed after impacting a hillside during an NDB approach to Dubrovnik Airport, Croatia. Sadly, the 1996 Croatia USAF Boeing CT-43 crash resulted in the deaths of all 35 people on board.
Background of the Mission: Flight IFO21
The aircraft was engaged in a critical mission to fly United States Secretary of Commerce Ron Brown and a delegation of industry executives around the region for official visits. Initially, the itinerary required the party to fly from Zagreb to Tuzla and Dubrovnik before returning to Zagreb.
Operating under the call sign IFO21, the aircraft departed Zagreb at 06:24 hours. Subsequently, the crew landed safely at Tuzla at 07:15 after an uneventful flight. After the passengers deplaned, the crew repositioned the aircraft to Split because Tuzla lacked sufficient ramp space to park the aircraft for the duration of the visit.
Flight Timeline and the Approach to Dubrovnik
Later that day, at 12:47, the aircraft returned to Tuzla, where the passengers reboarded. Following this, the flight departed Tuzla for Dubrovnik at 13:55. After crossing Split at 14:34, air traffic control cleared the flight to descend from FL210 to FL140. Furthermore, controllers provided an additional descent clearance to FL100. Once the aircraft reached FL100 at 14:45, just south of the Split VOR, Zagreb Center successfully transferred control to Dubrovnik Approach/Tower.
Misalignment and the Final Moments
The controller then cleared IFO21 direct to the Kolocep (KLP) NDB. After clearing opposite-direction traffic, controllers allowed IFO21 to descend to 5000 feet. At 14:52, the crew informed Dubrovnik Approach/Tower that they were 16 NM from the airport. Consequently, they received clearance to descend to 4,000 feet and instructions to report crossing the KLP beacon.
At 14:53, the aircraft crossed KLP, which served as the Final Approach Fix (FAF), at 4100 feet. However, they began the approach without formal approach clearance from Dubrovnik Tower. At that specific point, the aircraft was flying slightly high and fast. Moreover, the crew had not completely configured the aircraft for the approach, as standard procedures required.
At 14:54, the copilot of IFO21 called Dubrovnik Approach/Tower and stated, “We’re inside the locator, inbound.” IFO21 then received clearance for the NDB approach to runway 12. Unfortunately, the aircraft tracked a course of 110 degrees after crossing KLP, instead of tracking the published and correct course of 119 degrees. The aircraft maintained this erroneous track from KLP directly to the point of impact. The crew descended to 2200 feet, which was consistent with the published minimum descent altitude of 2150 feet.
Tragically, at 14:57, the aircraft impacted a rocky mountainside approximately 1.7 NM to the left (northeast) of the extended runway centerline and 1.8 NM north of the approach end of runway 12 at Dubrovnik Airport.
Official Causes of the 1996 Croatia USAF Boeing CT-43 Crash
Investigators ultimately identified three primary causes for this devastating accident:
- Command Failure: Command failure to comply with essential directives that required a thorough review of all instrument approach procedures not explicitly approved by the Defense Department.
- Aircrew Errors: Severe preflight planning errors, combined with critical mistakes made by the aircrew during the flight itself.
- Navigational Flaws: Improper and flawed design of the Dubrovnik NDB approach.
Source: Aviation Safety Network
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