U.S. Department
pitchbookof Transportation Federal Aviation Administration Office of Airport Safety and Standards
Engineering and Specifications Division
800 Independence Ave., SW
Washington, DC 20591
7/6/99
The attached is draft Federal Aviation Administration (FAA) Advisory Circular (AC) 150/5340-29 Installation Details for Land and Hold Short Lighting Systems. This AC provides standards for the design, installation, and maintenance of land and hold short lighting systems. It satisfies the new operational requirement for lighting systems contained in FAA Order 7110.199, Land and Hold Short Operations (LAHSO).
An earlier draft of this AC was circulated for review and comment. However, a new agreement between the FAA, the Airline Pilots Association, and the Air transport Association concerning LAHSO resulted in substantive changes to the lighting systems and resulted in a need to re-circulate the draft AC with revisions.
Comments are accepted through recognized industry organizations. The comment period clos August 13, 1999.
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XX/XX/XX AC 150/5340-29
TABLE OF CONTENTS
Interim Standard for Land and Hold Short Lighting Systems (iv)
PARAGRAPH PAGE
loof1.Introduction (1)
2.Background (1)
3.Definitions (1)剑桥少儿英语单词
4.Implementation Criteria (1)
5.Configuration (1)
6.Design (1)
7.Equipment and Material (3)
8.Installation (4)
9.Inspection (7)
10.Tests (8)
11.Maintenance (8)
APPENDIX 1
BIBLIOGRAPHY (2 pages)
APPENDIX 2
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DRAWINGS (13 pages)
FIGURE
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1.Typical Layout for Land and Hold Short Lights (1)
2.Special Considerations for Locating the LAHSO Alert Bar (2)
3.U of Alignment Jig, No Reference Edge Available, Ba and Conduit System (3)
4.Section Through Ba and Anchor, Ba and Conduit System, Rigid Pavement (4)
5.Section Through Ba and Anchor, Ba and Conduit System, Flexible Pavement (5)
6.Typical Wireway Installation Details for Land and Hold Short Lights (6)
7.Sawing and Drilling Details for Land and Hold Short Lights (7)
8.Typical Block Diagram for Land and Hold Short Lighting System (8)
9.Curve for Determining Maximum Separation Between Vault and
Control Panel With 120-Volt Control (9)
10.Wiring Details for Direct- and Ba-Mounted Land and Hold Short Lights (10)
11.Typical Transformer Housing and Conduit Installation Details for Where Isolation transformers
are Installed at Runway Edge (11)
12.Junction Box for Direct-Mounted Fixture Installations (12)
13.Typical Vault, Fixture Duct, Trenching, and Duct and Cable Marking Details (13)
TABLES
Table 1.Equipment and Material (4)
iii
AC 150/5340-29XX/XX/XX
iv INTERIM STANDARD FOR LAND AND HOLD SHORT LIGHTING SYSTEMS
(Valid thru June 8, 2000)
1. Background. The standard for land and hold short (LAHSO) lighting systems has consisted of a single bar of simultaneously pulsing white lights located at the hold-short point. In February 1999, bad on input from the Air Line Pilots Association, a new standard was propod and will be adopted. The new standard will include a LAHSO hold bar and a LAHSO alert bar.
The LAHSO alert bar in the new standard has a meaning opposite to that of the existing single bar of pulsing lights (hold bar). Therefore, the two systems cannot coexist. As a result, a date had to be established for all airports with LAHSO lighting systems to adopt the new standard.
2. Interim Standard. The interim standard for land and hold short lighting systems shall consist of a single bar of unidirectional simultaneously pulsing white lights located at the hold-short point. The specific configuration of the light fixtures is as described for the LAHSO hold bar in the new standard. This interim standard will remain in effect until June 9, 2000.
3. New Standard. The new standard for land and hold short lighting systems will become effective o
n June 9, 2000. The new standard for land and hold short lighting systems will consist of an alert bar of pulsing lights, and a hold bar, consisting of steady burning lights.
4. Guidance.
a. New Land and Hold Short Lighting Installations. The following suggested installation process is straightforward and designed to ea the transition from the existing standard to the new standard without causing any loss of land and hold short operations.
(1)Install an L-884A and an L-884H, described in AC 150/5345-54, in the airport lighting vault.
(2)Install the LAHSO hold bar at the hold-short point. However, instead of connecting it to the L-884H, connect it to the L-884A so that it puls.
(3)Install the LAHSO alert bar as described in the new standard.
(4)Run L-824 cable from the LAHSO alert bar to the vault, but do not connect it to an L-884A or H. NOTE: The LAHSO alert bar will not be operated prior to June 9, 2000.
(5)On the night of June 8, 2000, disconnect the LAHSO hold bar from the L-884A and connect it to th
e L-884H. Then connect the LAHSO alert bar to the L-884A using the cables which were run in the previous step. Any other connections, i.e., interlocks, automatic intensity control, etc., should then be made.
b. Existing 6-light Land and Hold Short Lighting Installations. Follow the process described above for new installations. AC 150/5345-54, Paragraph 3.5.4, contains failure mode requirements which should be met by all new and retrofitted systems.
c. Existing 5-light Land and Hold Short Lighting Installations. 5-light single bar systems powered by an L-884A are acceptable for the conduct of LAHSO operations thru June 8, 2000. Prior to that date, two additional light fixtures should be added to the bar in accordance with the new standard for land and hold short lighting systems. Follow the process described above for new installations. AC 150/5345-54, Paragraph 3.5.4, contains failure mode requirements which should be met by all new and retrofitted systems.
XX/XX/XX AC 150/5340-29
1
INSTALLATION DETAILS FOR LAND AND HOLD SHORT LIGHTING SYSTEMS
1.INTRODUCTION. Land and hold short lighting systems are installed to indicate the location of hold-short points on runways approved for land and hold short operations (LAHSO).
2.BACKGROUND. FAA Order 7110.199,Land and Hold Short Operations (LAHSO),provides operational requirements for lighting systems and other visual navigational aids that are required to conduct LAHSO.
3.
DEFINITIONS.
a. Available Landing Distance (ALD) - That portion of a runway available for landing roll-out for aircraft cleared for LAHSO. This distance is measured from the landing threshold to the hold-short point.
b. Hold-Short Point - A point on the runway beyond which a landing aircraft with a LAHSO clearance is not authorized to cross.
企业管理模式c. LAHSO Hold Bar - A row of steady-burning in-pavement white lights located at the hold-short point.
d. LAHSO Alert Bar - A row of pulsing in-pavement white lights located approximately 1,000 feet (300 m) prior to the LAHSO Hold Bar.
e. Land and Hold Short Operations (LAHSO) The operations include landing and holding short of an intercting runway, a taxiway, a predetermined point, or an approach/departure flightpath.
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4.IMPLEMENTATION CRITERIA. Install land and hold short lighting systems at locations described in the letter of agreement between the airport authority and the local Air Traffic Control Tower. See FAA Order 7110.199 for information on the letter of agreement.
5.CONFIGURATION. A land and hold short lighting system consists of a LAHSO Hold Bar and a LAHSO Alert Bar as shown in Appendix 2,Figure 1. The LAHSO Hold Bar consists of a row of six or ven in-pavement unidirectional steady-burning white lights installed across the runway at
the hold-short point. A 6-light bar is standard for new installations. A 7-light bar is standard for airports with existing 5-light bars. Five-light bars should be upgraded to meet the standard by adding a light fixture on each end of the existing installation,with the same spacing as the existing fixtures.Selection of the 6- or 7-light bar is not bad on the prence of runway centerline lights. The LAHSO Alert Bar consists of a row of six in-pavement unidirectional simultaneously pulsing whit
e lights installed across the runway 1,000 feet (300 m) prior to the LAHSO Hold Bar.
a.LAHSO Hold Bar and Alert Bar Locations. The light fixtures in the LAHSO Hold Bar should be centered on an imaginary line which is parallel to, and 2 feet (610 mm), -0 ft (0 mm), +3feet (915 mm), prior to the holding side of the runway holding position marking, as shown in Appendix 2, Figure 1. The light fixtures in the LAHSO Alert Bar should be centered on an imaginary line which is parallel to, and 1,000 feet (300 m), +/-3 feet (915 mm) from the LAHSO Hold Bar, as shown in Appendix 2, Figure 1. Individual fixtures in each bar may vary from the imaginary line up to ±2 inches (51 mm) in a direction parallel to the runway centerline. Fixtures should be installed so that their nearest edge is approximately 2 feet (610 mm) from any rigid pavement joint or another fixture. In the event of a conflict between any of the light fixtures and undesirable areas, such as rigid pavement joints, etc., which cannot be resolved through the 3 foot (915 mm) longitudinal tolerance or by varying the lateral spacing as specified in 5c, below, the holding position marking and the entire land and hold short lighting system should be moved sufficiently toward the landing threshold (shortening the available landing distance)to resolve the conflict.
b.Special Considerations for Locating the LAHSO Alert Bar. In the event the LAHSO Alert Bar falls within the confines of an intercting runway, the LAHSO Alert Bar (alone) should be moved away fr
om the hold-short point a sufficient distance to resolve the conflict. In addition, if the LAHSO Alert Bar falls outside the confines of an intercting runway, but would interfere with operations on that runway, then the LAHSO Alert Bar should be moved to the other side of the
