Service difficulty report · Control Unit · Boeing 7373H4

Difficulty date
April 1, 2015
Submitted
April 6, 2015
Operation
Air carrier
Aircraft
N636WN
Make and model
Boeing 7373H4
Aircraft serial
27709
Aircraft time
59,655 hours, 47,208 cycles
Part
Control Unit
Part number
654476122
Part serial
12472A
Condition
Faulty
Location
Aileron
Stage of operation
UK
How discovered
O
Nature of condition
J
Precautionary procedure
A

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

DIVERSION, SYS A ENG DRIVEN HYDRAULIC PUMP LOW PRESS LIGHT ILLUMINATED SYS A HYD QTY STABILIZED AT 1/4 FOR A LONG PERIOD THEN SLOWLY DECREASED TO NEAR ZERO. R & R A AILERON & ELEVATOR POWER CONTROL UNIT IAW MM.

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