Iberia flight 610

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Iberia flight 610
Iberia Boeing 727-200 EC-DCC.jpg

An identical Boeing 727 from Iberia

Accident summary
Accident type Controlled flight into terrain (CFIT)
place Monte Oiz near Bilbao
date 19th February 1985
Fatalities 148
Survivors 0
Aircraft type Boeing 727
operator Iberia (IB)
Mark EC-DDU - Alhambra de Granada
Departure airport Madrid-Barajas
Destination airport Bilbao
Passengers 141
crew 7th
Lists of aviation accidents

Iberia Airlines Flight 610 was a scheduled flight of Iberia from Madrid-Barajas to Bilbao , on February 19, 1985 while approaching Bilbao, a Boeing 727 crashed on Mount Oiz. All 141 passengers and the 7 crew members were killed.

Iberia Flight 610 (Spain)
Crash site
Crash site
Madrid-Barajas Airport
Madrid-Barajas Airport
Bilbao airport
Bilbao airport
Crash location with departure and arrival airport

the accident

The machine took off from Madrid-Barajas Airport at 07:47 UTC . At 08:16, the crew contacted the control tower in Bilbao for the first time and received the approach information. An ILS / DME approach to runway 30 was planned. The aircraft received clearance to fly directly to the VOR of Bilbao and begin the approach there. At 08:22 the air traffic controller confirmed the overflight of the radio beacon, the last contact with IB610. At 8:27 a.m. the Boeing 727 collided with radio masts on the northeast flank of the 1,027 meter high Monte Oiz and crashed after losing the left wing.


The Boeing 727 was flown with a three-person crew; in addition to the captain and the copilot, this type of aircraft also has a flight engineer on board who, among other things, monitors the engine parameters and controls fuel consumption. The licenses and airworthiness certificates of the three-person cockpit crew and the cabin crew were valid.


The master was 51 years old on the day of the accident and had had a commercial pilot license ( ATPL ) since 1966 . Since 1976 he had the type rating completed for the Boeing 727 and 13 687 flight hours, of which 211 as co-pilot and 4671 as captain on the 727. The captain in the mid participated in July 1984 at a strike by Iberia pilots and therefore was dismissed on 18 July 1984 . In November 1984 he was hired again and successfully completed the airline's standardization flights.


The copilot, aged 38, had his ATPL since 1980. He had flown 5,548 hours so far, of which 2,045 hours were completed as a copilot on the Boeing 727.

Flight engineer

The flight engineer was also 38 years old, had worked on the Boeing 727 since 1980 and had 2,721 flight hours on this type.


The flight was carried out with the Boeing 727-256 Alhambra de Granada , which was registered as EC-DDU with the Spanish aviation authority. The machine, built by Boeing in 1979, had the serial number 21777 and had been in the air for 13,400 hours by the time of the accident. Three Pratt & Whitney JT8D-9A engines propelled the aircraft with its maximum take-off weight of 83,552 kilograms. The aircraft had been examined for the last time by an examiner on May 13, 1984 and was roadworthy.

On the day of the accident, the EC-DDU took off with a weight of 66,189 kilograms, the center of gravity was within the permissible limits.


The main cause of the accident is that the crew was not aware of their position and thought they were approaching, which led to the sector altitude being undershot. Based on the Bilbao VOR / DME, it could have been determined where the aircraft is and that the final descent should not have been started. Another factor contributing to the accident was that the crew misinterpreted the acoustic warnings that were heard on the Boeing 727 when

  • the target altitude (4,300 feet in this case) is 900 feet away, and
  • if a shortfall of more than 300 feet (4,000 feet) is flown.

However, the crew had already reached an altitude of 5,000 feet, so the warning 900 feet before reaching the target altitude was not issued. In the further descent, the warning sounded only at 4,000 feet that the target altitude was undercut by more than 300 feet. With that, Iberia 610 was well below the minimum sector height of 4,354 feet. Nevertheless, the crew continued the approach and thus the descent, which led to the collision with one of the antennas on Monte Oiz when it reached 3,356 feet.

Web links

Individual evidence

  1. a b c Aircraft accident data and report in the Aviation Safety Network (English)
  2. Investigation report of the Spanish aviation authority (English; PDF; 8.4 MB), p. 1ff., Accessed on January 28, 2012
  3. a b Investigation report of the Spanish aviation authority (English; PDF; 8.4 MB), p. 7.
  4. Investigation report of the Spanish aviation authority (English; PDF; 8.4 MB), p. 5.
  5. Investigation report of the Spanish aviation authority (English; PDF; 8.4 MB), p. 6.
  6. Investigation report of the Spanish aviation authority (English; PDF; 8.4 MB), p. 8f.

Coordinates: 43 ° 5 ′ 47.5 "  N , 2 ° 36 ′ 46.5"  W.