but the 737 landing in front positioned its vertical fin and rudder straight in the beam of the ILS localizer antenna when it was about to reach the runway threshold. The beam deflection gave a false impression that the MD-80 had rapidly drifted off the beam (Evans 2003

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NU (Canada) went missing. It was flying with 11 passengers and 4 crew members. Later on it was found crashed while on approach to Resolute Bay. Only 3 passengers survived with injuries (Hradecky 2011).

The progress report released by TSB confirmed that the aircraft using ILS approach to runway35T was reported 10 miles visibility in the light drizzle with overcast cloud at 700ft AGL whereas it was found to be 5miles visibility in the light drizzle with overcast cloud at 300ft.AGL just after the crash. The crew started a go-round for 2 seconds and then impacted terrain at396ft.MSL whereas the runway level was 215ft. MSL. The impact was approximately1nm east from the middle point of the runway. There were no technical errors found in the aircraft before the impact but the ILS was confirmed to be serviceable (Hradecky 2011).

The weakness of the ILS system was observed critically when guidance signals were reflected due to two consecutively landing aircrafts resulting in false guidance. This may not be so dangerous if the weather conditions allow the pilot of the following aircraft to see the runway ahead. The weakness of the ILS relative to false signals was considerably experienced at Londons Gatwick airport years ago. MD-80 crew decided to make a practice hands off ILS auto land approach and touchdown while following a Boeing 737 to land on Gatwicks single runway. Everything was going on smoothly

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