SDR 2001UALA00057

Service difficulty report · Relay · Boeing 757222

Difficulty date: January 25, 2001
Submitted: February 8, 2001
Operation: Air carrier
Aircraft: N590UA
Make and model: Boeing 757222
Aircraft serial: 28708
Aircraft time: 12,704 hours, 3,548 cycles
Engine: Pwa PW2037
System (JASC): 2750 · Trailing Edge Flap Control System
Part: Relay
Part number: 91318506
Condition: Failed
Location: Te Flaps
Stage of operation: CR
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

VARIOUS EICAS MESSAGES, FLAP ISOLATION STATUS, RUDDER RATIO, MACH SPEED TRIM, STAB TRIM, ANTISKID AUTOBRAKE. *S/D* FAILURE OF TWO RELAYS, (LISTED BELOW), CAUSED THE EICAS MESSAGES TO APPEAR. VERIFICATION FLIGHT CONFIRMED ALL SYSTEMS NORMAL AFTER REPLACEMENT OF RELAYS. REPLACED K10104 RELAY PART NUMBER KD4A017 AND K106 RELAY PART NUMBER 9131-8506.