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‐ Untimely Terrain Awareness and Warning System (TAWS) alerts
‐ Untimely or absence of “RETARD” callout
‐ Untimely L/G GEAR NOT DOWN ECAM warning
‐ Absence or interruption of RA automatic callout (height announcement)
‐ Activation of AUTOLAND warning light in ILS (or MLS, GLS) approach (Refer to FCOM DSC
22_30 - Auto Flight - Flight Guidance) with AP engaged in LAND or FLARE mode when:
• One RA height goes below 200 feet and
• The difference between both RA height indications is greater than 15 feet
Note: There is no ECAM message or audio warning in association to the AUTOLAND
warning light. The AUTOLAND warning can be triggered even if AUTOLAND is not
planned
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
OPERATIONS ENGINEERING BULLETINS
ERRONEOUS RADIO ALTIMETER (RA) HEIGHT INDICATION
A318/A319/A320/A321 FLEET OEB-OEB1 P 5/6
FCOM 19 AUG 10
Auto Flight System mode changes (indicated on FMA):
‐ NAV mode engagement not possible after take off
‐ During an ILS (or MLS, GLS) approach, and depending on the engaged Flight Guidance (FG)
modes, the consequences may be:
• Untimely/early engagement of the LAND / FLARE / THR IDLE modes if the RA height used
by the FG is erroneous and lower than the real height.
Note: During ILS (or MLS, GLS) approach with AP and A/THR engaged, THR IDLE
(RETARD) mode untimely engagement will be associated with an initial pitch
attitude increase due to FLARE mode engagement.
• In AUTOLAND, the LAND / FLARE / THR IDLE modes will not engage, if the RA height used
by the FG is erroneous and higher than the real height.
• In case of Go-Around and if the RA is still frozen at a very low height indication:
▪ SRS and GA TRK modes engage
▪ NAV, HDG or TRK lateral modes cannot be selected
▪ LVR CLB will not be displayed on the FMA at THR RED ALT
▪ ALT* and ALT will not engage at FCU altitude Disconnecting AP and resetting both FDs
enable to recover basic modes (HDG and V/S).
During an ILS (or MLS, GLS) approach with AP engaged, if an erroneous and very low RA
height indication occurs, THR IDLE and FLARE modes may engage early with the following
consequences:
In CONF FULL, the ‐ High Angle of Attack protection is not available. As a consequence the
autopilot will not automatically disconnect at α prot +1°. If the flight crew does not immediately
react, the angle-of-attack will increase and may reach the stall value.
‐ In configurations other than CONF FULL, the High Angle of Attack autopilot disconnection is
available. The autopilot will automatically disconnect at α prot +1°.
‐ Loss of ALPHA FLOOR.
‐ The LOW ENERGY AUDIO WARNING – “SPEED SPEED SPEED” - remains available. In case
of activation of LOW ENERGY AUDIO WARNING, the flight crew must react as per procedure
(QRH ABN 22.2).
‐ In CONF FULL, the auto-trim function is inhibited.
‐ In manual flight or after AP disconnection, significant longitudinal sidestick input may be
required.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
OPERATIONS ENGINEERING BULLETINS
ERRONEOUS RADIO ALTIMETER (RA) HEIGHT INDICATION
A318/A319/A320/A321 FLEET OEB-OEB1 P 6/6
FCOM 19 AUG 10
Applicable to: ALL
PROCEDURE:
During all phases of flight, the flight crew must monitor and crosscheck all primary flight
parameters and FMA indications.
During ILS (or MLS, GLS) approach with AP engaged, in the event of an unexpected early THR
IDLE and FLARE modes engagement, the flight crew must immediately react as follows:
‐ Immediately perform an automatic Go-Around (Thrust Levers set to TOGA),
OR
‐ Immediatly disconnect the AP,
‐ Then continue the landing using raw data or visual references (FDs set to OFF),
OR
‐ Perform a manual Go-Around (Thrust Levers set to TOGA). Significant longitudinal sidestick
input may be required.
Note: 1. If the flight crew does not immediately react, the angle-of-attack will increase and
may reach the stall value.
2. In case of Go-Around and if the RA is still frozen at a very low height indication:
‐ SRS and GA TRK modes engage
‐ NAV, HDG or TRK lateral modes cannot be selected
‐ LVR CLB will not be displayed on the FMA at THR RED ALT
‐ ALT* and ALT will not engage at FCU altitude
Disconnecting AP and resetting both FDs enable to recover basic modes (HDG and
V/S).
3. In CONF FULL, the auto-trim function is inhibited. Regarding one step enable to
recover the auto-trim function.
For all the others events that may occur during approach, there is no change in the procedures
or in the recommended flight crew reactions.
　
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