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Accident and Serious Incident Reports: LB

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Article Information
Category: Level Bust Level Bust
Content source: SKYbrary About SKYbrary
Content control: EUROCONTROL EUROCONTROL

Contents

Definition

Accident and Serious Incident Reports relating to accidents which involved Level Bust

The events are organised under the following sub-categories:

Accepted ATC Clearance not Followed

  • A310, vicinity Birmingham UK, 2006 (LB CFIT HF) (On 24 November 2006, an A310 descended significantly below cleared altitude during a radar vectored approach positioning, as a result of the flight crew's failure to set the QNH, which was unusually low.)
  • FA50, vicinity London City UK, 2010 (CFIT LB HF) (On 21 January 2010, a Mystere Falcon 50 being operated by TAG Aviation on a positioning flight from Biggin Hill to London City in day VMC began a descent at a high rate below its cleared altitude of 2000 ft amsl because the aircraft commander believed, on the basis of external visual cues, that the aircraft was on a final approach track for Runway 27 at destination when in fact it was downwind for Runway 09. After an alert from ATC as the aircraft passed 900 ft agl at a rate of descent of approximately 2200 fpm, recovery to a normal landing on Runway 09 was achieved.)
  • B733, vicinity Manchester UK, 1997 (LB CFIT HF) (On 1 August 1997, an Air Malta B737, descending for an approach into Manchester UK in poor weather, descended significantly below the cleared and correctly acknowledged altitude, below MSA.)
  • GLF5 / A319, south-eastern France, 2004 (LB LOS HF) (On 16 September 2004, a loss of separation occurred over Geneva between Air France A319 and a Gulfstream 5 which commenced descent without clearance by ATC and with coordinated TCAS RAs not followed by either aircraft.)
  • C525 / B773, vicinity London City UK, 2009 (LB LOS AGC HF) (On 27 July 2009, a Cessna 525 departing from London City failed to comply with the initial 3000 ft QNH SID Stop altitude and at 4000 ft QNH in day VMC came into close proximity on an almost reciprocal heading with a Boeing 777-300. Actual minimum separation was approximately 0.5nm laterally and estimated at between 100 ft and 200 ft vertically.)
  • … further results


SID Bust

  • C525 / B773, vicinity London City UK, 2009 (LB LOS AGC HF) (On 27 July 2009, a Cessna 525 departing from London City failed to comply with the initial 3000 ft QNH SID Stop altitude and at 4000 ft QNH in day VMC came into close proximity on an almost reciprocal heading with a Boeing 777-300. Actual minimum separation was approximately 0.5nm laterally and estimated at between 100 ft and 200 ft vertically.)


Clearance Readback Error Undetected

  • C525 / B773, vicinity London City UK, 2009 (LB LOS AGC HF) (On 27 July 2009, a Cessna 525 departing from London City failed to comply with the initial 3000 ft QNH SID Stop altitude and at 4000 ft QNH in day VMC came into close proximity on an almost reciprocal heading with a Boeing 777-300. Actual minimum separation was approximately 0.5nm laterally and estimated at between 100 ft and 200 ft vertically.)


TCAS RA Response

  • GLF5 / A319, south-eastern France, 2004 (LB LOS HF) (On 16 September 2004, a loss of separation occurred over Geneva between Air France A319 and a Gulfstream 5 which commenced descent without clearance by ATC and with coordinated TCAS RAs not followed by either aircraft.)
  • C525 / B773, vicinity London City UK, 2009 (LB LOS AGC HF) (On 27 July 2009, a Cessna 525 departing from London City failed to comply with the initial 3000 ft QNH SID Stop altitude and at 4000 ft QNH in day VMC came into close proximity on an almost reciprocal heading with a Boeing 777-300. Actual minimum separation was approximately 0.5nm laterally and estimated at between 100 ft and 200 ft vertically.)


Manual Flight

  • F15 / E145, en-route, Bedford UK, 2005 (LB AI LOS AGC HF) (On 27 January 2005, two USAF-operated McDonald Douglas F15E fighter aircraft, both continued to climb and both passed through the level of an Embraer 145 being operated by British Airways Regional on a scheduled passenger flight from Birmingham to Hannover, one seen at an estimated range of 100 feet.)
  • A321, en-route, Vienna Austria, 2003 (WX LB LOC) (On 26th May 2003, a British Midland A321 suffered severe damage from hail en route near Vienna.)
  • FA50, vicinity London City UK, 2010 (CFIT LB HF) (On 21 January 2010, a Mystere Falcon 50 being operated by TAG Aviation on a positioning flight from Biggin Hill to London City in day VMC began a descent at a high rate below its cleared altitude of 2000 ft amsl because the aircraft commander believed, on the basis of external visual cues, that the aircraft was on a final approach track for Runway 27 at destination when in fact it was downwind for Runway 09. After an alert from ATC as the aircraft passed 900 ft agl at a rate of descent of approximately 2200 fpm, recovery to a normal landing on Runway 09 was achieved.)
  • B738, en-route, Arabian Sea, 2010 (LOC LB HF) (On 26 May 2010, a Boeing 737-800 being operated by Air India Express on a passenger flight from Dubai UAE to Pune, India was in the cruise at night at FL370 near PARAR when a sudden high speed descent occurred without ATC clearance during which nearly 7000 feet of altitude was lost in a little over 30 seconds before recovery was made. The remainder of the flight was uneventful. Despite the abnormal pitch, pitch change and ‘g’ variation, none of the 113 occupants had been injured.)
  • B733, vicinity Helsinki Finland, 2008 (LB CFIT HF) (On 26 March 2008, while being radar vectored to the Helsinki-Vantaaa airport, a Ukraine International Airlines’ Boeing 737-300 descended below its ATC cleared altitude, breaking the minimum terrain clearance with a telecommunications mast ahead of its track. The air traffic controller noticed that the airliner had deviated from its clearance altitude and ordered it to immediately return to 2300 FT.)


Pressure Altimeter Setting Error

  • B733, vicinity Helsinki Finland, 2008 (LB CFIT HF) (On 26 March 2008, while being radar vectored to the Helsinki-Vantaaa airport, a Ukraine International Airlines’ Boeing 737-300 descended below its ATC cleared altitude, breaking the minimum terrain clearance with a telecommunications mast ahead of its track. The air traffic controller noticed that the airliner had deviated from its clearance altitude and ordered it to immediately return to 2300 FT.)
  • MD11, vicinity East Midlands UK, 2005 (LB HF) (On 3 December 2005, the crew of a MD-11 freighter failed to set the (very low) QNH for a night approach, due to distraction, and as a result descended well below the cleared altitude given by ATC for the intercept heading for the ILS at Nottingham East Midlands airport, UK.)


Related Articles

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