Service difficulty report · Module · Boeing 7572T7

Difficulty date
August 15, 2010
Submitted
August 16, 2010
Operation
Air carrier
Aircraft
N937FD
Make and model
Boeing 7572T7
Aircraft serial
23895
Aircraft time
63,690 hours, 26,678 cycles
Part
Module
Part number
330651
Part serial
SRL038600837
Condition
Inoperative
Location
Rt Anti-Skid
Stage of operation
TX
How discovered
O
Nature of condition
O
Precautionary procedure
O

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

What was found

BRAKES ARE VERY TOUCHY. BREAKS GRAB GO FROM NON RESPONSIVE TO OVERLY RESPONSIVE. HOOKED UP BRAKE BLEEDER CART TO CK INDIVIDUAL BRAKE PRESSURES. NR4 BRAKE SHOWED ONLY 1200PSI WHEN BRAKES WERE APPLIED. ALL OTHER BRAKE PRESSURES OK FOR LT & RT GEARS. IAW MM 32-41-00-5. CKD PRESSURE OF NR4 BRAKE ONCE MORE WITH THE LT SYS ONLY AND PRESSURE WAS NORMAL (FROM ALT SYS) AT 3000 PSI. POSIBLE FUSE VALVE ON ANTI-SKID MANIFOLD BAD. ALSO, ANTI-SKID MANIFOLD MAY NOT BE SWITCHING FROM METER TO SYS PRESSURE WHEN BRAKES ARE BEING APPLIED, CAUSING THE GRABBING BRAKES. IAW MM32-41-0 0-5. HYD TEST CART STILL CONNECTED TO THE RT MLG AND BLEED SCREWS ARE STILL REMOVED. R & R RT ANTI-SKID MODULE REF MM32-42-02-4. NEEDS LEAK AND OPS CHECKS. R & R ANTI-SKID MODULE IAW MM 32-41-00-5. R & R ANTI-SKID MODULE IAW MM 32-60 41-00-5. LEAK CHECKED SYS WITH NO LEAKS NOTED. TAXIED ACFT EXTENSIVELY WITH NO BRAKE DISCREPANCIES NOTED.(CLOSED)

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