( Typical Profiles )
                                                                                       Getting to Grips with                                            Approach-and-Landing Accidents Reduction

Response to GPWS/TAWS – Pull-Up Maneuver Training
Page 5

QIT 115.3
VOR-DME

QMS 115.0
VOR-DME

D 16.0 QIT

. 13,780 ft D 16.0 QMS
Pull-up initiated Projected impact 13,200 ft
      16,408 ft Climbing to 17,000 ft

.
ILS approach RWY 35 - Night time - IMC - Rain

.
QMS VOR-DME ( 115.0 ) tuned instead of QIT ( 115.3 )

.
Procedure turn flown with reference to QMS, hence 12 NM further south

.
Crew alerted by 2500-ft radio-altimeter light

.
Crew responded to GPWS MK II warning: Terrain - Terrain - Pull up ! Pull up !

.
GPWS warning remained activated during 40 seconds

.
High terrain was avoided by only 150 ft RA

Figure 1
CFIT – An Encounter Avoided

Quito – Equador – March 92
Drawing adapted from “ Flight Into Terrain And the Ground Proximity Warning System “ by Don Bateman
Response to GPWS/TAWS – Pull-Up Maneuver Training
Page 6

200 kt Terrain along track 4000 ft/mn

Terrain if full procedure turn to right

17 degree pitch Maximum thrust Flight path
MK II GPWS warning  16 DME QMS
Terrain-Terrain ( 28 DME QIT )
Pull up ! Pull up !

150 Radial QMS ( outbound )

14 15 16 17 18 19 20 21 22 23 24 25 26
Distance from RWY 35 - NM
Figure 2 CFIT – An Encounter Avoided
Quito – Equador – March 92
Crew response to RA Alert Light and GPWS Warning
Altitude ( ft MSL ) 17 000 16 000
15 000 14 000 13 000 12 000 11 000 10 000

Drawing adapted from “ Flight Into Terrain And the Ground Proximity Warning System “ by Don Bateman
Response to GPWS/TAWS – Pull-Up Maneuver Training
Page 7

￠.  “ WHOOP WHOOP PULL UP “

Simultaneously :

. PITCH ATTITUDE .................... AT LEAST 20° NOSE UP
Use stick shaker boundary as upper limit
. THROTTLES ........................................ FULL FORWARD
. A/THR ....................................................... DISCONNECT
. AUTOPILOT .............................................. DISCONNECT

. BANK ........................................................ WINGS LEVEL
. SPEEDBRAKES ............................ CHECK RETRACTED

.  When flight path is safe and GPWS warning has ceased :
°.  Decrease pitch attitude and accelerate
.  When speed above V LS ( as applicable ) and V/S positive :
°.  Clean up aircraft as required
Figure 3
Response to GPWS Warning – Conventional Aircraft Models

￠.  “ WHOOP WHOOP PULL UP “ - “ TERRAIN TERRAIN WHOOP WHOOP PULL UP “

Simultaneously :

. AP ........................................................................... OFF . PITCH .............................................................. PULL UP Pull up to full back stick and maintain . THRUST LEVERS................................................. TOGA
　
中國航空網 www.k6050.com
航空翻譯 www.aviation.cn
本文鏈接地址：Getting to Grips with Approach-and-Landing Accidents Reducti(123)