Service difficulty report · Metering Valve · Boeing 747428

Difficulty date
April 10, 2015
Submitted
April 13, 2015
Operation
Air carrier
Aircraft
N952CA
Make and model
Boeing 747428
Aircraft serial
25238
Aircraft time
87,126 hours, 12,683 cycles
Engine
Ge CF680C2B1F
Part
Metering Valve
Part number
705073
Part serial
1440
Condition
Intermittent
Location
Brake System
Part time
87,125 hours, 12,683 cycles
Stage of operation
TX
How discovered
O
Nature of condition
O
Precautionary procedure
K

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

What was found

BRAKING NOT NORMAL. EICAS GEAR PAGE INDICATES NO BRAKING ON RT SIDE BODY & WING GEAR. R & R BRAKE METERING VLV IAW AMM 32-41-03. R & R RT AUTO BRAKE SHUTTLE VLV IAW AMM 32-42-12. R & R ANTISKID SHUTTLE VLV IAW AMM 32-42-14. BRAKE SYS CHECK NORMAL. PERFORMED TAXI TEST OF ACFT. TAXI TEST CHECKED NORMAL.