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holding pattern
The FMC automatically commands an exit from some holding patterns in
procedures under the following conditions:
• for instrument approach holding patterns designed as a course reversal in
lieu of a procedure turn, the airplane exits holding upon arrival at the
holding fix inbound
• for some holding patterns in SIDs, the airplane exits holding when
arriving at an altitude
October 1, 2000
747 Operations Manual
Flight Management, Navigation -
FMC Descent and Approach
Copyright © The Boeing Company. See title page for details.
D6-30151-425 11.43.21
1 Holding FIX
Displays the holding fix.
2 Quadrant/Radial (QUAD/RADIAL)
Normally displays dashes.
Valid entry is X/XXX OR XX/XXX, or /XXX. Example: NW/330.
Entry changes INBD CRS/DIR to agree.
3 Inbound Course/Direction (INBD CRS/DIR)
Displays inbound course and direction of turn.
Valid entry is XXX (course), XXX/X, /X, or X (turn direction).
Entry changes QUAD/RADIAL to agree.
4 LEG TIME
Displays 1.0 MIN (minute) at or below 14,000 feet.
2 / 0 0 0
X T
. N M
2 0
K
S P D / T G T A L T
F I X E T A
1 4 . 5 z
EF C T I ME
Z
H O L D A V A I L
B E S T S P E E D
220 T
N E H O L D EX I T HO LD>
3 L
B A T U M
A C T
0
-- - --
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-
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M I N
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1 .
L E G T I M E
I N B D C R S / D I R
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- - - - - - - - - - - - - - - - - - - - - - -
F I X
R T E 1 H O L D 1 / 1
4
4
39
HOLD
FIX IN
ROUTE
HOLDING
14 40
2+ 45
1 7
11
12
8
9
2
3
4
5
6
10
October 1, 2000
747 Operations Manual
Copyright © The Boeing Company. See title page for details.
11.43.22 D6-30151-425
Flight Management, Navigation -
FMC Descent and Approach
Displays 1.5 MIN above 14,000 feet.
Displays dashes when entry made on LEG DIST line.
Valid entry is XXX.X.
Entry displays dashes on LEG DIST line.
When climbing/descending through 14,000 feet with VNAV active and the
SPD/TGT ALT at 1R is displayed in large font, the FMC adjusts the leg time.
5 LEG Distance (DIST)
Normally displays dashes. Allows entry of leg distance for hold.
Valid entry is XX.X or X.X.
Entry displays dashes on LEG TIME line.
6 NEXT HOLD, ERASE
NEXT HOLD -
Push – displays prompts for entering another hold in route.
ERASE -
Displayed when hold modified.
Push -
• erases modification to hold
• displays NEXT HOLD prompt
7 Speed/Target Altitude (SPD/TGT ALT)
Displays dashes or fix target speed/altitude from RTE LEGS page.
Display is small font for FMC predictions, large font for constraints or manual
entries.
Valid entry is XXX/ (speed); YYY, YYYY, or YYYYY (target altitude), or a
combination of speed/target altitude.
• speed entry requires altitude constraint
• altitude entry must be below cruise altitude
Entry displays on HOLDAT waypoint onRTE LEGS page.
During cruise, entry of a target altitude lower than CRZ ALT modifies DESCENT
page and displays a T/D. After T/D, the DESCENT page remains active unless a
new cruise altitude is entered.
8 FIX ETA
With no EFC TIME entry, displays time the fix will be passed.
April 01, 2001
747 Operations Manual
Flight Management, Navigation -
FMC Descent and Approach
Copyright © The Boeing Company. See title page for details.
D6-30151-425 11.43.23
With EFC TIME entry, displays the first time the fix will be passed after the EFC
time.
9 Expect Further Clearance Time (EFC TIME)
Normally displays dashes.
Valid entry is XXXX (time).
Entry changes ETA and fuel predictions for the route after holding.
10 HOLD Available (HOLD)
Displays holding time available before requiring reserve fuel to reach the
destination.
11 BEST SPEED
Displays best holding speed for airplane gross weight, altitude, and flap setting.
Note: BEST SPEED may exceed regulatory maximum holding speeds.
12 EXIT HOLD, EXIT ARMED
EXIT HOLD -
Push -
• arms a holding pattern exit
• displays EXIT ARMED prompt
EXIT ARMED -
When executed, airplane returns to the fix via the inbound course and exits holding
pattern.
April 01, 2001
747 Operations Manual
Copyright © The Boeing Company. See title page for details.
11.43.24 D6-30151-425
Flight Management, Navigation -
　
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