SDR AALA20061100

Service difficulty report · Gearbox · Boeing 757223

Difficulty date: November 25, 2006
Submitted: December 1, 2006
Operation: Air carrier
Aircraft: N623AA
Make and model: Boeing 757223
Aircraft serial: 24581
Engine: Rroyce RB211535E4
System (JASC): 7260 · Turbine Engine Accessory Drive
Part: Gearbox
Condition: Failed
Location: Lt Engine
Stage of operation: DE
How discovered: O
Nature of condition: K
Precautionary procedure: A

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

What was found

ORD APPROXIMATELY 25 MINUTES OUT OF ORD LEFT ENGINE OIL QUANTITY BEGAN TO DECREASE. OIL QUANTITY WENT TO ZERO IN ABOUT THREE MINUTES. OIL PRESSURE SUBSEQUENTLY DECREASED TO ZERO. CREW SHUT LEFT ENGINE DOWN. RETURNED TO ORD AND LANDED WITHOUT INCIDENT. SINGLE ENGINE TIME 20 MINUTES. REPLACED LEFT ENGINE ON 26 NOV 2006 AT ORD DUE TO GEARBOX FAILURE. SYSTEM GROUND CHECKED NORMAL OPERATION.