Service difficulty report · Shutoff Valve · Boeing 737890

Difficulty date
July 4, 2019
Submitted
July 9, 2019
Operation
Air carrier
Aircraft
N568AS
Make and model
Boeing 737890
Aircraft serial
35183
Aircraft time
47,437 hours, 14,307 cycles
Part
Shutoff Valve
Part number
EM91795
Part serial
061108155P
Condition
Failed
Location
Mlg Brake
Part time
47,427 hours, 14,304 cycles
Stage of operation
CL
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

AFTER TAKEOFF, ANTI-SKID LIGHT ILLUMINATED AND REMAINED ILLUMINATED. HYDRAULIC QUANTITY/PRESSURE NORMAL, ALL CB'S IN. GROUNDED - YES. DIVERSION TIME 17 MINUTES. PERFORMED BITE TEST OF AACU AND FOUND MAINT MSG FOR PARKING BRAKE REF FIM 32-42 TASK 801. ACCOMP FIM TASK 32-42 TASK 811 AND FOUND PARKING BRAKE SHUTOFF VALVE DEFECTIVE. REPLACED PARKING BRAKE SHUTOFF VALVE REF AMM 32-44-21 AND ACCOMPLISHED REPAIR CONFIRMATION BITE CK OF AACU WITH NO FAULTS FOUND.