FLIGHT OPERATIONS
Operational Information
Supplement
Supplement Number G550-OIS-02:
14 CFR Part 91 Landing Field Length
Basic Issue
May 15, 2003
Type: Normal Procedures
Production Effectivity: All G550 Airplanes
This Operational Information Supplement provides additional
procedures, techniques, or information recommended for the operations
of Gulfstream G550 aircraft under normal or emergency conditions.
FAA approval is not intended or implied unless specifically noted.
 2003 Gulfstream Aerospace Corporation
All rights reserved, including the right to reproduce this publication. No part may be reproduced, stored in any
retrieval system, or transmitted in any part or form or by any means, electronic, photo-copying, microfilm,
microfiche, mechanical, or otherwise, without prior written permission of Gulfstream Aerospace Corporation.
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G550-OIS-02
LOG OF REVISIONS
Rev.
No.
Pages
Revised
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May 15/03
Description of Revision
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Date
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TABLE OF CONTENTS
SUBJECT
PAGE
General ........................................................................................... 1
Introduction.................................................................................. 1
Applicability ................................................................................. 1
Use of Abbreviations ................................................................... 1
Landing Distance Determination ................................................. 2
General Conditions Assumed To Calculate Landing Distances . 2
Dry Runway Assumptions and Information................................. 2
Wet Runway Assumptions and Information ................................ 2
Example ...................................................................................... 3
G550 Part 91 Unfactored Landing Field Length Chart................ 4
G550 Part 91 Unfactored Landing Distance Tables ................... 5
Feet To Meters Conversion Table............................................... 6
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GENERAL
Introduction
This section provides landing distance/field length data for use by
operators who are required to observe the regulations of FAR 91.
According to FAR 91 requirements, these distances are based on
the total landing distance from a height of 50 feet, as detailed in
FAR 25.125. The total distance from 50 feet is the sum of the air
distance (50 feet to touchdown) and the ground roll distance
(touchdown to full stop). Unlike FAR 121 and FAR 135 landing
criteria, no additional factors of conservatism have been added to
the computed landing distances. Since no extra conservatism has
been added for FAR 91 landing distances, additional correction
grids (grids that are not provided in Section 5 AFM Landing
Performance) for temperature and runway slope are included on
these charts. FAR 91 landing distances are further presented for
both dry and wet (ungrooved) runway surfaces.
FAR 91 landing data are shown in both graphical and tabular form.
Graphical data provides a more exact solution than the tabular
data. The tabular data are provided for ease of use, but contain
more conservatism particularly when accounting for wind, runway
slope, and temperature effects.
Applicability
These data are applicable to all G550 airplanes (GV-SP airplanes
having Aircraft Service Change (ASC) 11).
Use of Abbreviations
For ease of readability, the abbreviation “FAR” (Federal Aviation
Regulation) should be considered interchangeable with Title 14,
Code of Federal Regulations (CFR), Part 91.
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14 CFR PART 91 LANDING FIELD LENGTH
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LANDING DISTANCE DETERMINATION
General Conditions Assumed To Calculate Landing Distances
1. These data are applicable for the following conditions only: flaps
39°, and anti-skid operative.
2. At 50 feet above the runway, the aircraft speed is VREF and the
approach glide slope is 3.5°.
3. Touchdown occurs at a 8 FPS sink rate while engine thrust is at
High Idle.
4. Ground spoilers are automatically deployed on wheel spin-up
following touchdown.
5. Maximum anti-skid braking is achieved 1.5 seconds after
touchdown.
6. Separate correction grids are provided to assess the effects of
wind, temperature and runway slope.
Dry Runway Assumptions and Information
1. All data are based on a flight tested braking coefficient.
2. Following touchdown, engine thrust decays to the Low Idle
position. No credit was taken for reverse thrust.
3. For distance determination, a damp, but “non-reflective” runway
surface may be considered dry.
Wet Runway Assumptions and Information
1. The wet runway braking coefficient is based on FAA/JAA
empirical data. These data are valid for both grooved and
ungrooved runway surfaces.
2. A runway is considered wet if it appears “reflective”, but does not
have significant areas of standing water. If the depth of standing
water is greater than 0.125 inches (3 mm) and this accumulation
covers more than 25 percent of the runway surface, then the
runway is considered contaminated. Contaminated runway
methodology must be used to determine landing distance.
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14 CFR PART 91 LANDING FIELD LENGTH
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3. Computed distances assume Maximum Reverse Thrust is
selected on both engines at touchdown. Maximum Reverse
Thrust is maintained to the recommended reverse thrust cutoff
speed of 80 KCAS. A correction factor is provided for one engine
inoperative or one thrust reverser inoperative.
CAUTION: THESE DISTANCES ARE BASED ON THE
PROCEDURES DETAILED ABOVE. EXCESSIVE THRESHOLD
SPEEDS, SHALLOW APPROACH ANGLES, EXTENDED FLARE AND
DELAYED BRAKE APPLICATION WILL RESULT IN LONGER
LANDING DISTANCES THAN INDICATED.
Example
Determine the landing distance for a FAR 91 operator.
Given:
Landing Gross Weight.........................54,000 pounds (24,494 kg)
Airport Pressure Altitude .................................................2000 feet
Airport Temperature Deviation from ISA ..................................0°C
Runway Condition ..................................................................WET
Ground Spoilers ........................................................ OPERATIVE
Anti-Skid .................................................................... OPERATIVE
Wind ............................................................ +10 knots (headwind)
Runway Slope ...................................................... -1.0% (downhill)
Chart Solution:
Landing Distance from Chart ............................ 3090 feet (942 m)
Table Solution:
1. In the wet runway table, interpolate between 50000 lb. and
55000 lb. at 2000 ft. to get the resulting landing distance of
3162 ft. at a gross weight of 54000 lb.
2. Next multiply 3162 ft. by 110% (100% + (1.0*10%)) to account for a runway slope of –1.0%. The resulting landing distance is 3480 ft.
3. Intentionally, no credit is applied for headwind.
Landing Distance from Table .......................... 3480 feet (1061 m)
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14 CFR PART 91 LANDING FIELD LENGTH
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14 CFR PART 91 LANDING FIELD LENGTH
BASIC ISSUE
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G550-OIS-02
G550 PART 91 UNFACTORED LANDING DISTANCE
DRY RUNWAY
APA
Weight (Pounds)
(Feet)
50,000
55,000
60,000
65,000
70,000
75,000
0
2200
2270
2380
2510
2640
2770
2,000
2270
2340
2470
2610
2750
2890
4,000
2340
2430
2580
2720
2870
3022
6,000
2420
2530
2680
2840
3000
3170
8,000
2510
2630
2800
2970
3140
3320
10,000
2600
2750
2930
3110
3300
3490
12,000
2700
2880
3080
3270
3480
3690
14,000
2820
3030
3240
3450
3670
3900
15,000
2890
3110
3320
3550
3770
4010
WET RUNWAY
APA
Weight (Pounds)
(Feet)
50,000
55,000
60,000
65,000
70,000
75,000
2910
3050
3260
3520
3780
4030
2,000
3,0500
3,1900
3440
3720
3990
4270
4,000
3190
3360
3660
3930
4230
4520
6,000
3340
3560
3850
4170
4480
4820
8,000
3520
3760
4090
4430
4760
5110
10,000
3700
3990
4350
4700
5060
5450
12,000
3900
4250
4640
5020
5430
5840
14,000
4130
4540
4960
5370
5800
6260
15,000
4270
4700
5110
5570
6000
6470
0
Exclusions:
1. No credit for headwind.
2. No credit for temperature below ISA.
3. No credit for uphill slope.
4. No credit for reverse thrust on dry runways.
Corrections:
1. Increase landing distance by 25% for every 10 knots of tailwind.
2. Increase landing distance by 5% for every 10° above ISA.
3. Increase landing distance by 10% for every 1% of downhill slope.
4. For wet runway conditions, increase landing distance by 4% for
one engine inoperative or one thrust reverser inoperative landings.
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Feet To Meters Conversion
Feet
Meters
2000
610
2100
640
2200
671
2300
701
2400
732
Feet
Meters
2500
762
2600
792
2700
823
2800
853
2900
884
Feet
Meters
3000
914
3100
945
3200
975
3300
1006
3400
1036
Feet
Meters
3500
1067
3600
1097
3700
1128
3800
1158
3900
1189
Feet
Meters
4000
1219
4100
1250
4200
1280
4300
1311
4400
1341
Feet
Meters
4500
1372
4600
1402
4700
1433
4800
1463
4900
1494
Feet
Meters
5000
1524
5100
1554
5200
1585
5300
1615
5400
1646
Feet
Meters
5500
1676
5600
1707
5700
1737
5800
1768
5900
1798
Feet
Meters
6000
1829
6100
1859
6200
1890
6300
1920
6400
1951
Feet
Meters
6500
1981
6600
2012
6700
2042
6800
2073
6900
2103
Feet
Meters
7000
2134
7100
2164
7200
2195
7300
2225
7400
2256
Feet
Meters
7500
2286
7600
2316
7700
2347
7800
2377
7900
2408
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14 CFR PART 91 LANDING FIELD LENGTH
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May 15/03