SDR ASAA2017022119899

Service difficulty report · Flange · Boeing 737990ER

Difficulty date: February 21, 2017
Submitted: February 23, 2017
Operation: Air carrier
Aircraft: N461AS
Make and model: Boeing 737990ER
Aircraft serial: 36363
Aircraft time: 11,706 hours, 3,830 cycles
Engine: Cfmint CFM567B27E
System (JASC): 7220 · Turbine Engine Air Inlet Section
Part: Flange
Condition: Loose
Location: Nr 1 Eng Fan
Stage of operation: IN
How discovered: 9
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 ACCOMPLISHING NR 1 ENGINE INLET & FAN BLADE INSPECTION, FOUND TEST PORT FLANGE TO FAN CASE LOOSE BETWEEN FLANGE B6 AND B7, AT 11 O'CLOCK. ACFT GROUNDED. REMOVED, CLEANED, AND REINSTALLED TEST PORT BOSS IAW ENGINE SUPPLEMENTAL MANUAL 72-23-31.