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Honeywell EGPWS MK V Pilot's Manual page 86

Enhanced ground proximity warning system
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During a back-taxi scenario, the Insufficient Runway Length
Advisory would aid as a confirmation of pilot intent to back-
Entry and
Extended Holding On Runway
Safety data show that 17% of runway incursions involved the
poor use of a line-up-and-wait clearance (or a taxi-into-
position-and-hold clearance [TIPH]). The typical scenario
involved Tower ATC clearing an aircraft into position-and-
hold on to the departure runway. Factors such as distractions
in the Tower, handling multiple frequencies, high workload
and memory lapses have resulted in the tower controller
simultaneously clearing other traffic to land on the occupied
runway. In some cases crews issued with the TIPH clearance
were holding-in-position for an unusually extended period.
Industry safety recommendations suggest that flight crews
holding-in-position on an active runway for an unexpected
extended period should contact tower to confirm the extended
holding clearance. Timely crew intervention could potentially
reduce the risk of a runway incursion.
The purpose of the Extended Holding On Runway Advisory is
to provide crew awareness of an extended holding period on
the runway.
The aural advisory is given if the following criteria are met:
• Aircraft must be on a runway; and
• Aircraft heading is within 20 degrees of runway heading;
• Aircraft remains in position for a time period considered to
The extended holding period time is set in the RCD and it
cannot be changed by the flight crew. The time period can be
configured for 60, 90, 120, 180, 240, or 300 seconds.
The aircraft heading must be within 20 degrees of runway
heading and the aircraft must not move more than 100 ft along
the runway for this advisory to be activated.
Note that if the aircraft continues to hold for a period in
excess of the initial extended holding period, the advisory
may be set to repeat for the same or different holding interval.
The repeat advisory time may also be configured to be off.
These options are set in the RCD and cannot be changed by
the flight crew.
Smart Runway
be an extended holding period.
Mark V and Mark VII EGPWS Pilot's Guide
Rev H, August 2011

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