SDR ASAA2019101731297

Service difficulty report · Engine · Boeing 737990ER

Difficulty date: October 17, 2019
Submitted: November 13, 2019
Operation: Air carrier
Aircraft: N440AS
Make and model: Boeing 737990ER
Aircraft serial: 41705
Aircraft time: 23,707 hours, 7,704 cycles
Engine: Ge CFM56*
Engine time: 20,199 hours, 6,523 cycles
System (JASC): 7220 · Turbine Engine Air Inlet Section
Part: Engine
Condition: Corroded
Location: Left
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

#1 ENG INLET AND FAN BLADES- DETAILED INSPT.FOUND 11 EACH NUTPLATES FOR AFT ACOUSTICAL PANELS THAT HAVE CORROSION ON O/B SIDE OF FAN FRAME CASE. ( CORROSION IS ON FAN FRAME CASE). LOCATED AT 3 OCLOCK PANEL, 4 OCLOCK PANEL, 5 OCLOCK PANEL. AND 10 OCLOCK PANEL. ALL NUT PLATES MARKED. GROUNDED - YES. #1 ENGINE REPLACED.