SDR ASAA2023092445296

Service difficulty report · Drain Mast · Boeing 737890

Difficulty date: September 24, 2023
Submitted: September 26, 2023
Operation: Air carrier
Aircraft: N565AS
Make and model: Boeing 737890
Aircraft serial: 35181
Aircraft time: 61,288 hours, 18,344 cycles
System (JASC): 2820 · Aircraft Fuel Distribution System
Part: Drain Mast
Part number: 346A28015
Condition: Cracked
Location: Lower Fuselage
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

WHILE PERFORMING TRANSIT CHECK FOUND 2" CRACK OB SIDE AFT ENDGE 3/4" OB SIDE FWD EDGE 1 1/2" CRACK IB SIDE AFT EDGE 3/4" CRACK IB SIDE FWD EDGE. ALL CRACKS LOCATED NEAR TOP OF APU SHROUD DRAIN MAST. GROUNDED - YES. REMOVED APU FUEL FEED LINE SHROUD MAST REF AMM 28-25-07 53124REPLACED APU FUEL FEED LINE SHROUD DRAIN MAST REF AMM 28-25-07-420-801REF L/P 60911696 FOR DRAIN MAST STENCIL MARKING DEFERRALREF L/P 60911697 FOR DRAIN MAST PAINT DEFERRAL.