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GBAS Landing System (GLS) Topics for Today
Boeing history with GLS
Equipage
Training
Operational
Implementation
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Boeing History with GLS
Boeing – NASA Research Program (1995)
1000+ successful approaches with (4)
prototype Differential GNSS Systems
225 successful autolands
Led to development of SARPS compliant
prototype ground station
Boeing decision to develop and certify
GLS for the 737NG
Production Certification on 737NG (2005)
GLS is production option
Available with bulletin and retrofit kit
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service kit.
Certified 737 GLS Architecture
GPS ANT-L
GPS ANT L
MMR–1/-2 FCC MMR–1/-2
CLOCK
GLS is designed to
be “ILS-like”. ILS #
MMR-1
ADIRU
- VDB/LOC
A/B
EGPWS
MMR 1/ MMR–1/-2
MMR–1/-2
MMR–1/-2
VOR/LOC ANT
(TAIL)
ANT
SW#1
PORT
B
1
ILS #
GNSS
L/R
NCP
ADIRU-L/R
NCP - CAP
NCP - F/O
VDB/LOC
FMC
L/R
MCU MSU
MMR–1/-2
MMR–1/-2
ANT
SW#2
2
AUDI
O
MMR-2
DUAL G/S ANT
G/S ANT
DFDAU
SAI
ISFD
REU
MMR–1/-2
DUAL LOC ANT MMR–1/-2 MMR–1
(NOSE)
GPS ANT-R
GPS ANT - R
L/R
ND
L/R
DEU-1 PFD
DEU-2
MMR–1/-2
MMR–1/-2
FMC Flight Management Computer
MCU Mode Control Unit
SAI Standby Attitude Indicator
ISFD Integrated Standby Flight Display
DEU Display Electronics Unit
PFD Primary Flight Display
ND Navigation Display
VOR VHF Omnidirectional Ranging Receiver
MMR Multimode Receiver
ADIRU Air Data Inertial Reference Unit
NCP Navigation Control Panel
LOC Localizer
G/S Glideplope
GPS Global Positioning System
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DFDAU Digital Flight Data Acquisition Unit
REU Remote Electronics Unit
FCC Flight Control Computer
EGPWS Enhanced Ground Proximity Warning System
The Next Generation 737 Flight Deck with GLS
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Navigation Control Panel (Tuning Panel)
Select GLS mode
Set GLS channel number
Select GLS mode “Active”
Verify tuning (on PFD)
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GLS - Approach Selection via FMS
Line select a "GLS" approach
Missed approach" is auto selected
"GLS data" is presented
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GLS – Primary Flight Display
ILS GLS
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Flight Crew Training
Training for flight crews current in
B737-600/-700/-800/-900 aircraft is
established at Level A..
GLS approach procedures and
techniques are identical to those
of ILS (with 2 minor exceptions):
ILS uses a radio frequency whereas
the GLS is a channel on the MMR.
The navigation reference on the PFD
say “GLS” instead of “ILS”.
Crew actions while flying a GLS
approach are the same as those
for an ILS approach.
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GLS on other Boeing Models
For the 787 Dreamliner, GLS
is a basic capability (2010).
For the 747-8, GLS is a basic
capability (provisioned for
Category III) (2010).
For the 777, Boeing is
evaluating the potential
incorporation of GLS
Category III capability.
Implementation on other
Boeing models is subject to
customer demand.
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Future Category III Capability with GBAS
Boeing & FAA are pursuing
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