-
right .......................................... 231 622 42. Transmission problem.
 -left ........................................... 231 621 41
-right .......................................... 231 621 42
 Horn, ground crew call: does not come on when selected on CDU ...................................... 234 611 00
 Hot start (impending), engine shut down before overtemp:
 -left engine .................................... 710 621 61
-right engine ................................... 710 621 62
 Hung start:
 -left engine .................................... 801 618 61
-right engine ................................... 801 618 62
OBSERVED FAULTS 
PW Page 46 D633W113-BEJ May 05/02 
H 
FAULT DESCRIPTION_________________  FAULT CODE__________ 
 Hydraulic air drive unit (ADU) turbine gearbox 
 assembly: differential pressure indicator on oil 
 filter is extended. 
 -
C1 system ...................................... 291 818 01
 -C2 system ...................................... 291 818 02
 Hydraulic air driven pump (ADP) pressure and case drain filter module: . Differential pressure indicator on case drain filter is extended.
 -C1 system ...................................... 291 814 01
-C2 system ...................................... 291 814 02
. Differential pressure indicator on pressure filter is extended.
 -C1 system ...................................... 291 815 01
-C2 system ...................................... 291 815 02
 Hydraulic alternating current motor pump (ACMP) pressure and case drain filter module:. Differential pressure indicator on case drain filter is extended.
 -C1 system ...................................... 291 812 01
-C2 system ...................................... 291 812 02
-left system .................................... 291 812 41
-right system ................................... 291 812 42
. Differential pressure indicator on pressure filter is extended.
 -C1 system ...................................... 291 813 01
-C2 system ...................................... 291 813 02
-left system .................................... 291 813 41
-right system ................................... 291 813 42
OBSERVED FAULTS 
PW Page 47 D633W113-BEJ May 05/02 
H 
FAULT DESCRIPTION_________________  FAULT CODE__________ 
 Hydraulic engine driven pump (EDP) pressure and 
 case drain filter module: 
 . Differential pressure indicator on case drain 
 filter is extended. 
 -
C1 system ...................................... 291 816 01
 
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