SDR WRNA200700022

Service difficulty report · Connector · Boeing 747212B

Difficulty date: April 17, 2007
Submitted: April 23, 2007
Operation: Air carrier
Aircraft: N526UP
Make and model: Boeing 747212B
Aircraft serial: 21937
Aircraft time: 90,145 hours, 16,966 cycles
System (JASC): 3297 · Landing Gear System Wiring
Part: Connector
Condition: Dirty
Location: Brake Valve
Stage of operation: TO
How discovered: O
Nature of condition: J
Precautionary procedure: C

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

What was found

TAKEOFF WARNING HORN CAME ON AT BRAKE RELEASE. TROUBLESHOOT PER FIM 31-26-00 PG 109, FOUND TAKEOFF WARNING CIRCUITS OPERABLE. DURING TROUBLESHOOTING, FOUND PARKING BRAKE LIGHT NOT ILLUMINATING, CLEANED AND RESEATED PARKING BRAKE VALVE CONNECTOR. PERFORMED AURAL TAKEOFF WARNING SYSTEM OPERATION TEST PER 747 MM 31-26-00 PAGE 502, OPS CHECKED NORMAL. AIRCRAFT RELEASED FOR SERVICE.

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