SDR UALA2011030201033

Service difficulty report · Sleeve · Boeing 747422

Difficulty date: March 2, 2011
Submitted: March 17, 2011
Operation: Air carrier
Aircraft: N171UA
Make and model: Boeing 747422
Aircraft serial: 24322
Aircraft time: 80,802 hours, 9,650 cycles
Engine: Pwa PW4056
System (JASC): 7830 · Engine Thrust Reverser
Part: Sleeve
Condition: Gouged
Location: Thrust Reverser
Stage of operation: NR
How discovered: 9
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

6 INCH GOUGE IN NR 4 INBD REVERSER SLEEVE AT BOTTOM APROX 06:30. INSIDE SLEEVE. REMOVED NR 4 ENG INBD THRUST REVERSER SLEEVE PER MM. INSTALLED NR 4 THRUST REVERSER SLEEVE INBOARD SIDE. MANUALLY RETRACTED REVERSER HALF. UNABLE TO CHECK OPERATION DUE TO REVERSER SLEEVE NOT LOCKING AND NO GREEN INDICATIONS. MANUALLY RETRACTED REVERSER HALF. UNABLE TO CHECK OPERATION DUE TO REVERSER (PARTIAL). REPLACED REVERSER SLEEVE, ALL CHECKED GOOD.