SDR 2006UALA00834

Service difficulty report · Csd · Boeing 737522

Difficulty date: April 30, 2006
Submitted: May 10, 2006
Operation: Air carrier
Aircraft: N921UA
Make and model: Boeing 737522
Aircraft serial: 25388
Aircraft time: 39,202 hours, 28,854 cycles
Engine: Ge CFM56*
System (JASC): 2420 · AC Generation System
Part: Csd
Condition: Making Metal
Location: Nr 1 Generator
Stage of operation: LD
How discovered: O
Nature of condition: H
Precautionary procedure: O

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

What was found

LANDED ORD UNDER AMBER ALERT DUE TO LOSS OF NR 1 GENERATOR AND PREVIOUSLY DEFERED APU. CONSTANT SPEED DRIVE FOUND CONTAMINATED WITH METAL IN SYSTEM. REPLACED CONSTANT SPEED DRIVE. FOUND GENERATOR POWER CONTROL CIRCUIT BREAKER TRIPPED. DETERMINED THAT RELAY R41 FAILED. REPLACED R41 RELAY.