SDR UALA2009101203199

Service difficulty report · Wire · Boeing 747422

Difficulty date: October 11, 2009
Submitted: October 12, 2009
Operation: Air carrier
Aircraft: N173UA
Make and model: Boeing 747422
Aircraft serial: 24380
Aircraft time: 76,059 hours, 8,630 cycles
Engine: Pwa PW4056
System (JASC): 2797 · Flight Control System Wiring
Part: Wire
Part number: W4515302303
Condition: Broken
Location: Te Flap
Stage of operation: IN
How discovered: C
Nature of condition: O
Precautionary procedure: K

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

What was found

WHILE ACP TEST FOR INBOARD FLAP COAST BREAK FOUND LEFT OUTBOARD FLAP INDICATION NOT READING. FOUND EXISTING FAULT LEFT OUTBOARD RVDT FAIL. MSG 27636. STARTED PERFORMING FIM 27-58 TASK 820. ISOLATED EACH FCU NO HELP. REPLACED LEFT O/B TRAILING EDGE FLAP RVDT, NO HELP, NEED TO CONTINUE AT STEP B3. FOUND BROKEN WIRE W4515- 302,303 NEAR CONNECTOR DM7891. REPAIRED BROKEN WIRES. FLAP INDICATION OP CHECKS NORMAL. REPLACED LEFT O/B TRAILING EDGE FLAP RVDT. COMPLETED OPS CHECK FROM STEP D7 TO END.