LLL

Question 1

What is the purpose of lost link logic?
What are the two different types of lost link logic?

Answer 1

Safe and predictable operation

Ground lost link
In-flight lost link (aka “climb state” or high speed lost link)

Ground lost link = <50 KIAS AND <50 KGS AND gear down
In-flight lost link = >50 KIAS OR >50 KGS OR gear up

Question 2

What happens to the aircraft if it loses link while in manual taxi <2kts?

Answer 2

Immediately
-Brakes full
-throttle idle
-And lots of other things

5 seconds
-engine killed

5 min
-brakes released for recovery

Question 3

What happens to the aircraft if it loses link while in manual taxi >2kts?

Answer 3

Immediately
-Brakes full
-Engine killed
-And lots of other things

5 min
-brakes released for recovery

Question 4

What are the various arming times for lost link logic?

Answer 4

2 seconds = C-band LOS or Ku (launch and recovery mode)
5 seconds = DLOS or IDL (launch and recovery)
10 seconds = Ku (cruise mode) or IDL (cruise mode)

2 seconds of any lost uplink will result in status warning message

Question 5

What happens if no emergency mission is loaded?

Answer 5

Aircraft flies a circular loiter over GDT position at initial lost link altitude at 105 KIAS

Question 6

What happens if aircraft loses link below initial lost link altitude? (non ATLC)

Answer 6

-aircraft starts climb
-creates flyover waypoint 2.5 NM on initial lost link heading
-3 NM loiter at flyover waypoint until reaching initial lost link altitude or 30 min
-aircraft begins emergency mission

Question 7

What happens if aircraft loses link above initial lost link altitude? (non ATLC)

Answer 7

Aircraft begins emergency mission

Question 8

What is aircraft lost link logic if ATLC landing active?

Answer 8

If before WP4 = continue to fly ATLC pattern until WP4

At/after WP4 = climb to pattern altitude and departure waypoint WP10 then execute standard lost link procedure

Aircraft landed = stopping procedure and kill engine

Link re

Question 9

What is aircraft lost link logic if ATLC takeoff active?

Answer 9

Aircraft on ground = stop aircraft and kill engine

Aircraft in air = fly to WP 10 then emergency mission

Question 10

What is lost link logic if aircraft in ATLC takeoff or landing and link is reestablished?

Answer 10

Return to ATLC mission at selected pattern entry waypoint

Question 11

What reasons might cause you to send the aircraft lostlink even though you have a good link?

Answer 11

1. Heading towards bad weather
2. Heading towards airspace border
3. Bad Ku link (Aircraft switching between lost link and preprogram mission)

Question 12

What is a quick way to send the aircraft lost link? (Not turning off GDT power)

Answer 12

Switch racks with intentional mismatch of control