Service difficulty report · Nut Plate · Boeing 737890

Difficulty date
January 8, 2020
Submitted
January 29, 2020
Operation
Air carrier
Aircraft
N564AS
Make and model
Boeing 737890
Aircraft serial
35103
Aircraft time
50,395 hours, 15,180 cycles
Engine
Cfmint CFM567B262
Part
Nut Plate
Condition
Corroded
Location
Lt Accous Panel
Part time
35,075 hours, 10,208 cycles
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

NR 1 ENG INLET AND FAN BLADES-DETAILED INSP FOUND 17 EACH NUTPLATES HAVE CORROSION UNDER THEM ON O/B FAN FRAME CASE AT AFT ACOUSTICAL PANEL LOCATION. GROUNDED - YES. CONTINUE IN-SERVICE OF 50 CYCLES, NO CRACKS IN ALL NUTPLATES FOUND IAW AMM 72-23-05-700-801-F00 2,F,(H),2. REPAIR MUST BE DONE IN 50 CYCLES. REMOVED AND REPLACED NR 1 ENGINE.