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, , MSN 4566, 4719, 4617, 4473
M Localization T DU Title DU identification DU date
OEBPROCOEBPROC1
Erroneous Radio Altimeter (RA) Height
Indication
NG01007
OEBPROCOEBPROC1
Erroneous Radio Altimeter (RA) Height
Indication - Approval
00012048.0001001 09 MAR 10
Criteria: SA
Applicable to: ALL
OEBPROCOEBPROC1
Erroneous Radio Altimeter (RA) Height
Indication - Procedure
00012049.0001001 09 MAR 10
Criteria: SA
Applicable to: ALL
OEBPROCOEBPROC1
AQU3I1CK8 R/AEF3E1RE9N/ACE3 H2A0ND/A B3O2OK1 3/4
OPERATIONS ENGINEERING BULLETINS
30 AUG 10
A318/A319/A320/A321 FLEET , , , , , , , ,
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, , MSN 4566, 4719, 4617, 4473
ECAM ENTRY
NONE
PROCEDURE:
This bulletin is issued to remind operators of the possible consequences of an
erroneous Radio
Altimeter (RA) height indication.
Erroneous RA height indication may have on aircraft systems, any of the effects listed
in the OEB1 of
the FCOM.
This OEBPROC1 is issued to provide flight crews with the following
recommendations:
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.
Flight crews must report in the aircraft technical logbook if any of the consequences
listed in the OEB1
of the FCOM, are seen.
OEBPROCOEBPROC1
AQU3I1CK8 R/AEF3E1RE9N/ACE3 H2A0ND/A B3O2OK1 4/4
OPERATIONS ENGINEERING BULLETINS
30 AUG 10
Intentionally left blank
A318/A319/A320/A321 FLEET , , , , , , , ,
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, , MSN 4566, 4719, 4617, 4473__
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