SDR ASAA2022103040566

Service difficulty report · Pad · Boeing 737990ER

Difficulty date: October 30, 2022
Submitted: November 3, 2022
Operation: Air carrier
Aircraft: N491AS
Make and model: Boeing 737990ER
Aircraft serial: 44109
Aircraft time: 25,879 hours, 8,156 cycles
System (JASC): 7530 · Compressor Bleed Control
Part: Pad
Condition: Debonded
Location: Nr 2 Engine
Stage of operation: IN
How discovered: V
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

DURING ASA T/C 78273000, FOUND ENG #2 FAULT CODE 75-30452 THE VBV POSITION SIGNALS DISAGREE SHORT TIME FAULT. GROUNDED - YES. REF B737-900 FIM 75-32 TASK 803, NO FAULTS FOUND DURING INITIAL EVALUATION. DURING INSPECTION OF THE #2 ENG VBV RING GUIDE PADS, ALL 4 PADS WERE FOUND DISBONDED/LOOSE. REMOVED THE LOOSE PADS FROM THE ENGINE. (ASA L/P 60373114 FOR DEFERRAL FOR REMOVED PADS). FIM 75-32 TASK 803 REPAIR CONFIRMATION SUCCESSFUL.