The flight crew selected the ILS . At 21 : 33 : 04, the controller informed the flight that they were fifteen miles from the outer marker and cleared them for an ILS approach on runway 22L . Klotz acknowledged.
12.
There was no audible voice radio contact with traffic controllers from either plane after the collision, although LaGuardia had begun tracking an incoming, fast-moving, unidentified plane from Preston toward the LaGuardia " Flatbush " outer marker.
13.
The agent reported a 300'obscured, indefinite ceiling, visibility of in light drizzle, wind 020?( north-northeast ) at 4 NDB beacon at the outer marker for the approach and asked if they were receiving it.
14.
The unstabilized nature of the approach was due initially to the aircraft's passing the outer marker above the glide slope at an excessive airspeed and thereafter compounded by the flightcrew's preoccupation with the questionable information presented by the flight director system.
15.
The accident site was between the Half Moon Bay Fan Marker and the ILS Outer Marker and it appears that the flight had not maintained at least on top of clouds between these points but had descended in weather conditions which precluded reference to the ground.
16.
In this time interval it would not have been possible for the flight at normal speed to have flown from the Half Moon Bay Outer Marker to the ILS Outer Marker, make the required turn and return to the site of the crash in accordance with Civil Aeronautics Authority approved instrument approach procedure.
17.
In this time interval it would not have been possible for the flight at normal speed to have flown from the Half Moon Bay Outer Marker to the ILS Outer Marker, make the required turn and return to the site of the crash in accordance with Civil Aeronautics Authority approved instrument approach procedure.
18.
Just after 8 : 21 am ARTC cleared the flight to the San Francisco Instrument Landing System ( ILS ) Outer Marker beacon via the Half Moon Bay Fan Marker direct to the San Francisco Outer Marker, with instructions to maintain at least above all clouds and to contact San Francisco Approach Control after passing the Half Moon Bay Fan Marker.
19.
Just after 8 : 21 am ARTC cleared the flight to the San Francisco Instrument Landing System ( ILS ) Outer Marker beacon via the Half Moon Bay Fan Marker direct to the San Francisco Outer Marker, with instructions to maintain at least above all clouds and to contact San Francisco Approach Control after passing the Half Moon Bay Fan Marker.
20.
"As shown by the flight recorder trace, the aircraft stayed on the correct flight path to Runway 23 Right for most of the time between the outer marker " Metro Eco " and Mexico City International Airport, and only deviated to the runway closed to traffic ( 23 Left ) when at a height of ( 600 feet ) above the ground during its final approach ."
